FCL/sf/mw/qt: comparison util/src/gui/widgets/qcombobox.cpp

equal deleted inserted replaced

-:41300fa6a67c
+:f7bc934e204c
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "qcombobox.h"
+#ifndef QT_NO_COMBOBOX
+#include <qstylepainter.h>
+#include <qlineedit.h>
+#include <qapplication.h>
+#include <qdesktopwidget.h>
+#include <qlistview.h>
+#include <qtableview.h>
+#include <qitemdelegate.h>
+#include <qmap.h>
+#include <qmenu.h>
+#include <qevent.h>
+#include <qlayout.h>
+#include <qscrollbar.h>
+#include <qtreeview.h>
+#include <qheaderview.h>
+#ifndef QT_NO_IM
+#include "qinputcontext.h"
+#endif
+#include <private/qapplication_p.h>
+#include <private/qcombobox_p.h>
+#include <private/qabstractitemmodel_p.h>
+#include <private/qabstractscrollarea_p.h>
+#include <private/qsoftkeymanager_p.h>
+#include <qdebug.h>
+#ifdef Q_WS_X11
+#include <private/qt_x11_p.h>
+#endif
+#if defined(Q_WS_MAC) && !defined(QT_NO_EFFECTS) && !defined(QT_NO_STYLE_MAC)
+#include <private/qcore_mac_p.h>
+#include <QMacStyle>
+#include <private/qt_cocoa_helpers_mac_p.h>
+#endif
+#ifndef QT_NO_EFFECTS
+# include <private/qeffects_p.h>
+#endif
+QT_BEGIN_NAMESPACE
+QComboBoxPrivate::QComboBoxPrivate()
+: QWidgetPrivate(),
+model(0),
+lineEdit(0),
+container(0),
+insertPolicy(QComboBox::InsertAtBottom),
+sizeAdjustPolicy(QComboBox::AdjustToContentsOnFirstShow),
+minimumContentsLength(0),
+shownOnce(false),
+autoCompletion(true),
+duplicatesEnabled(false),
+frame(true),
+maxVisibleItems(10),
+maxCount(INT_MAX),
+modelColumn(0),
+inserting(false),
+arrowState(QStyle::State_None),
+hoverControl(QStyle::SC_None),
+autoCompletionCaseSensitivity(Qt::CaseInsensitive),
+indexBeforeChange(-1)
+#ifndef QT_NO_COMPLETER
+, completer(0)
+#endif
+{
+}
+QStyleOptionMenuItem QComboMenuDelegate::getStyleOption(const QStyleOptionViewItem &option,
+const QModelIndex &index) const
+{
+QStyleOptionMenuItem menuOption;
+menuOption.palette = option.palette.resolve(QApplication::palette("QMenu"));
+menuOption.state = QStyle::State_None;
+if (mCombo->window()->isActiveWindow())
+menuOption.state = QStyle::State_Active;
+if ((option.state & QStyle::State_Enabled) && (index.model()->flags(index) & Qt::ItemIsEnabled))
+menuOption.state |= QStyle::State_Enabled;
+else
+menuOption.palette.setCurrentColorGroup(QPalette::Disabled);
+if (option.state & QStyle::State_Selected)
+menuOption.state |= QStyle::State_Selected;
+menuOption.checkType = QStyleOptionMenuItem::NonExclusive;
+menuOption.checked = mCombo->currentIndex() == index.row();
+if (QComboBoxDelegate::isSeparator(index))
+menuOption.menuItemType = QStyleOptionMenuItem::Separator;
+else
+menuOption.menuItemType = QStyleOptionMenuItem::Normal;
+QVariant variant = index.model()->data(index, Qt::DecorationRole);
+switch (variant.type()) {
+case QVariant::Icon:
+menuOption.icon = qvariant_cast<QIcon>(variant);
+break;
+case QVariant::Color: {
+static QPixmap pixmap(option.decorationSize);
+pixmap.fill(qvariant_cast<QColor>(variant));
+menuOption.icon = pixmap;
+break; }
+default:
+menuOption.icon = qvariant_cast<QPixmap>(variant);
+break;
+}
+menuOption.text = index.model()->data(index, Qt::DisplayRole).toString()
+.replace(QLatin1Char('&'), QLatin1String("&&"));
+menuOption.tabWidth = 0;
+menuOption.maxIconWidth =  option.decorationSize.width() + 4;
+menuOption.menuRect = option.rect;
+menuOption.rect = option.rect;
+// Make sure fonts set on the combo box also overrides the font for the popup menu.
+if (mCombo->testAttribute(Qt::WA_SetFont)
+|| mCombo->testAttribute(Qt::WA_MacSmallSize)
+|| mCombo->testAttribute(Qt::WA_MacMiniSize)
+|| mCombo->font() != qt_app_fonts_hash()->value("QComboBox", QFont()))
+menuOption.font = mCombo->font();
+else
+menuOption.font = qt_app_fonts_hash()->value("QComboMenuItem", mCombo->font());
+menuOption.fontMetrics = QFontMetrics(menuOption.font);
+return menuOption;
+}
+#ifdef QT_KEYPAD_NAVIGATION
+void QComboBoxPrivate::_q_completerActivated()
+{
+Q_Q(QComboBox);
+if ( QApplication::keypadNavigationEnabled()
+&& q->isEditable()
+&& q->completer()
+&& q->completer()->completionMode() == QCompleter::UnfilteredPopupCompletion ) {
+q->setEditFocus(false);
+}
+}
+#endif
+void QComboBoxPrivate::updateArrow(QStyle::StateFlag state)
+{
+Q_Q(QComboBox);
+if (arrowState == state)
+return;
+arrowState = state;
+QStyleOptionComboBox opt;
+q->initStyleOption(&opt);
+q->update(q->style()->subControlRect(QStyle::CC_ComboBox, &opt, QStyle::SC_ComboBoxArrow, q));
+}
+void QComboBoxPrivate::_q_modelReset()
+{
+Q_Q(QComboBox);
+if (lineEdit) {
+lineEdit->setText(QString());
+updateLineEditGeometry();
+}
+if (currentIndex.row() != indexBeforeChange)
+_q_emitCurrentIndexChanged(currentIndex);
+q->update();
+}
+void QComboBoxPrivate::_q_modelDestroyed()
+{
+model = QAbstractItemModelPrivate::staticEmptyModel();
+}
+//Windows and KDE allows menus to cover the taskbar, while GNOME and Mac don't
+QRect QComboBoxPrivate::popupGeometry(int screen) const
+{
+#ifdef Q_WS_WIN
+return QApplication::desktop()->screenGeometry(screen);
+#elif defined Q_WS_X11
+if (X11->desktopEnvironment == DE_KDE)
+return QApplication::desktop()->screenGeometry(screen);
+else
+return QApplication::desktop()->availableGeometry(screen);
+#else
+return QApplication::desktop()->availableGeometry(screen);
+#endif
+}
+bool QComboBoxPrivate::updateHoverControl(const QPoint &pos)
+{
+Q_Q(QComboBox);
+QRect lastHoverRect = hoverRect;
+QStyle::SubControl lastHoverControl = hoverControl;
+bool doesHover = q->testAttribute(Qt::WA_Hover);
+if (lastHoverControl != newHoverControl(pos) && doesHover) {
+q->update(lastHoverRect);
+q->update(hoverRect);
+return true;
+}
+return !doesHover;
+}
+QStyle::SubControl QComboBoxPrivate::newHoverControl(const QPoint &pos)
+{
+Q_Q(QComboBox);
+QStyleOptionComboBox opt;
+q->initStyleOption(&opt);
+opt.subControls = QStyle::SC_All;
+hoverControl = q->style()->hitTestComplexControl(QStyle::CC_ComboBox, &opt, pos, q);
+hoverRect = (hoverControl != QStyle::SC_None)
+? q->style()->subControlRect(QStyle::CC_ComboBox, &opt, hoverControl, q)
+: QRect();
+return hoverControl;
+}
+/*
+Computes a size hint based on the maximum width
+for the items in the combobox.
+*/
+int QComboBoxPrivate::computeWidthHint() const
+{
+Q_Q(const QComboBox);
+int width = 0;
+const int count = q->count();
+const int iconWidth = q->iconSize().width() + 4;
+const QFontMetrics &fontMetrics = q->fontMetrics();
+for (int i = 0; i < count; ++i) {
+const int textWidth = fontMetrics.width(q->itemText(i));
+if (q->itemIcon(i).isNull())
+width = (qMax(width, textWidth));
+else
+width = (qMax(width, textWidth + iconWidth));
+}
+QStyleOptionComboBox opt;
+q->initStyleOption(&opt);
+QSize tmp(width, 0);
+tmp = q->style()->sizeFromContents(QStyle::CT_ComboBox, &opt, tmp, q);
+return tmp.width();
+}
+QSize QComboBoxPrivate::recomputeSizeHint(QSize &sh) const
+{
+Q_Q(const QComboBox);
+if (!sh.isValid()) {
+bool hasIcon = sizeAdjustPolicy == QComboBox::AdjustToMinimumContentsLengthWithIcon ? true : false;
+int count = q->count();
+QSize iconSize = q->iconSize();
+const QFontMetrics &fm = q->fontMetrics();
+// text width
+if (&sh == &sizeHint || minimumContentsLength == 0) {
+switch (sizeAdjustPolicy) {
+case QComboBox::AdjustToContents:
+case QComboBox::AdjustToContentsOnFirstShow:
+if (count == 0) {
+sh.rwidth() = 7 * fm.width(QLatin1Char('x'));
+} else {
+for (int i = 0; i < count; ++i) {
+if (!q->itemIcon(i).isNull()) {
+hasIcon = true;
+sh.setWidth(qMax(sh.width(), fm.boundingRect(q->itemText(i)).width() + iconSize.width() + 4));
+} else {
+sh.setWidth(qMax(sh.width(), fm.boundingRect(q->itemText(i)).width()));
+}
+}
+}
+break;
+case QComboBox::AdjustToMinimumContentsLength:
+for (int i = 0; i < count && !hasIcon; ++i)
+hasIcon = !q->itemIcon(i).isNull();
+default:
+;
+}
+} else {
+for (int i = 0; i < count && !hasIcon; ++i)
+hasIcon = !q->itemIcon(i).isNull();
+}
+if (minimumContentsLength > 0)
+sh.setWidth(qMax(sh.width(), minimumContentsLength * fm.width(QLatin1Char('X')) + (hasIcon ? iconSize.width() + 4 : 0)));
+// height
+sh.setHeight(qMax(fm.height(), 14) + 2);
+if (hasIcon) {
+sh.setHeight(qMax(sh.height(), iconSize.height() + 2));
+}
+// add style and strut values
+QStyleOptionComboBox opt;
+q->initStyleOption(&opt);
+sh = q->style()->sizeFromContents(QStyle::CT_ComboBox, &opt, sh, q);
+}
+return sh.expandedTo(QApplication::globalStrut());
+}
+void QComboBoxPrivate::adjustComboBoxSize()
+{
+viewContainer()->adjustSizeTimer.start(20, container);
+}
+void QComboBoxPrivate::updateLayoutDirection()
+{
+Q_Q(const QComboBox);
+QStyleOptionComboBox opt;
+q->initStyleOption(&opt);
+Qt::LayoutDirection dir = Qt::LayoutDirection(
+q->style()->styleHint(QStyle::SH_ComboBox_LayoutDirection, &opt, q));
+if (lineEdit)
+lineEdit->setLayoutDirection(dir);
+if (container)
+container->setLayoutDirection(dir);
+}
+void QComboBoxPrivateContainer::timerEvent(QTimerEvent *timerEvent)
+{
+if (timerEvent->timerId() == adjustSizeTimer.timerId()) {
+adjustSizeTimer.stop();
+if (combo->sizeAdjustPolicy() == QComboBox::AdjustToContents) {
+combo->adjustSize();
+combo->update();
+}
+}
+}
+void QComboBoxPrivateContainer::resizeEvent(QResizeEvent *e)
+{
+QStyleOptionComboBox opt = comboStyleOption();
+if (combo->style()->styleHint(QStyle::SH_ComboBox_Popup, &opt, combo)) {
+QStyleOption myOpt;
+myOpt.initFrom(this);
+QStyleHintReturnMask mask;
+if (combo->style()->styleHint(QStyle::SH_Menu_Mask, &myOpt, this, &mask)) {
+setMask(mask.region);
+}
+} else {
+clearMask();
+}
+QFrame::resizeEvent(e);
+}
+void QComboBoxPrivateContainer::leaveEvent(QEvent *)
+{
+// On Mac using the Mac style we want to clear the selection
+// when the mouse moves outside the popup.
+#ifdef Q_WS_MAC
+QStyleOptionComboBox opt = comboStyleOption();
+if (combo->style()->styleHint(QStyle::SH_ComboBox_Popup, &opt, combo))
+view->clearSelection();
+#endif
+}
+QComboBoxPrivateContainer::QComboBoxPrivateContainer(QAbstractItemView *itemView, QComboBox *parent)
+: QFrame(parent, Qt::Popup), combo(parent), view(0), top(0), bottom(0)
+{
+// we need the combobox and itemview
+Q_ASSERT(parent);
+Q_ASSERT(itemView);
+setAttribute(Qt::WA_WindowPropagation);
+setAttribute(Qt::WA_X11NetWmWindowTypeCombo);
+// setup container
+blockMouseReleaseTimer.setSingleShot(true);
+// we need a vertical layout
+QBoxLayout *layout =  new QBoxLayout(QBoxLayout::TopToBottom, this);
+layout->setSpacing(0);
+layout->setMargin(0);
+// set item view
+setItemView(itemView);
+// add scroller arrows if style needs them
+QStyleOptionComboBox opt = comboStyleOption();
+const bool usePopup = combo->style()->styleHint(QStyle::SH_ComboBox_Popup, &opt, combo);
+if (usePopup) {
+top = new QComboBoxPrivateScroller(QAbstractSlider::SliderSingleStepSub, this);
+bottom = new QComboBoxPrivateScroller(QAbstractSlider::SliderSingleStepAdd, this);
+top->hide();
+bottom->hide();
+} else {
+setLineWidth(1);
+}
+setFrameStyle(combo->style()->styleHint(QStyle::SH_ComboBox_PopupFrameStyle, &opt, combo));
+if (top) {
+layout->insertWidget(0, top);
+connect(top, SIGNAL(doScroll(int)), this, SLOT(scrollItemView(int)));
+}
+if (bottom) {
+layout->addWidget(bottom);
+connect(bottom, SIGNAL(doScroll(int)), this, SLOT(scrollItemView(int)));
+}
+// Some styles (Mac) have a margin at the top and bottom of the popup.
+layout->insertSpacing(0, 0);
+layout->addSpacing(0);
+updateTopBottomMargin();
+}
+void QComboBoxPrivateContainer::scrollItemView(int action)
+{
+#ifndef QT_NO_SCROLLBAR
+if (view->verticalScrollBar())
+view->verticalScrollBar()->triggerAction(static_cast<QAbstractSlider::SliderAction>(action));
+#endif
+}
+/*
+Hides or shows the scrollers when we emulate a popupmenu
+*/
+void QComboBoxPrivateContainer::updateScrollers()
+{
+#ifndef QT_NO_SCROLLBAR
+if (!top || !bottom)
+return;
+if (isVisible() == false)
+return;
+QStyleOptionComboBox opt = comboStyleOption();
+if (combo->style()->styleHint(QStyle::SH_ComboBox_Popup, &opt, combo) &&
+view->verticalScrollBar()->minimum() < view->verticalScrollBar()->maximum()) {
+bool needTop = view->verticalScrollBar()->value()
+> (view->verticalScrollBar()->minimum() + spacing());
+bool needBottom = view->verticalScrollBar()->value()
+< (view->verticalScrollBar()->maximum() - spacing()*2);
+if (needTop)
+top->show();
+else
+top->hide();
+if (needBottom)
+bottom->show();
+else
+bottom->hide();
+} else {
+top->hide();
+bottom->hide();
+}
+#endif // QT_NO_SCROLLBAR
+}
+/*
+Cleans up when the view is destroyed.
+*/
+void QComboBoxPrivateContainer::viewDestroyed()
+{
+view = 0;
+setItemView(new QComboBoxListView());
+}
+/*
+Returns the item view used for the combobox popup.
+*/
+QAbstractItemView *QComboBoxPrivateContainer::itemView() const
+{
+return view;
+}
+/*!
+Sets the item view to be used for the combobox popup.
+*/
+void QComboBoxPrivateContainer::setItemView(QAbstractItemView *itemView)
+{
+Q_ASSERT(itemView);
+// clean up old one
+if (view) {
+view->removeEventFilter(this);
+view->viewport()->removeEventFilter(this);
+#ifndef QT_NO_SCROLLBAR
+disconnect(view->verticalScrollBar(), SIGNAL(valueChanged(int)),
+this, SLOT(updateScrollers()));
+disconnect(view->verticalScrollBar(), SIGNAL(rangeChanged(int,int)),
+this, SLOT(updateScrollers()));
+#endif
+disconnect(view, SIGNAL(destroyed()),
+this, SLOT(viewDestroyed()));
+delete view;
+view = 0;
+}
+// setup the item view
+view = itemView;
+view->setParent(this);
+view->setAttribute(Qt::WA_MacShowFocusRect, false);
+qobject_cast<QBoxLayout*>(layout())->insertWidget(top ? 2 : 0, view);
+view->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
+view->installEventFilter(this);
+view->viewport()->installEventFilter(this);
+view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+QStyleOptionComboBox opt = comboStyleOption();
+const bool usePopup = combo->style()->styleHint(QStyle::SH_ComboBox_Popup, &opt, combo);
+#ifndef QT_NO_SCROLLBAR
+#ifndef Q_WS_S60
+if (usePopup)
+view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+#endif
+#endif
+if (combo->style()->styleHint(QStyle::SH_ComboBox_ListMouseTracking, &opt, combo) ||
+usePopup) {
+view->setMouseTracking(true);
+}
+view->setSelectionMode(QAbstractItemView::SingleSelection);
+view->setFrameStyle(QFrame::NoFrame);
+view->setLineWidth(0);
+view->setEditTriggers(QAbstractItemView::NoEditTriggers);
+#ifndef QT_NO_SCROLLBAR
+connect(view->verticalScrollBar(), SIGNAL(valueChanged(int)),
+this, SLOT(updateScrollers()));
+connect(view->verticalScrollBar(), SIGNAL(rangeChanged(int,int)),
+this, SLOT(updateScrollers()));
+#endif
+connect(view, SIGNAL(destroyed()),
+this, SLOT(viewDestroyed()));
+#ifdef QT_SOFTKEYS_ENABLED
+selectAction = QSoftKeyManager::createKeyedAction(QSoftKeyManager::SelectSoftKey, Qt::Key_Select, itemView);
+cancelAction = QSoftKeyManager::createKeyedAction(QSoftKeyManager::CancelSoftKey, Qt::Key_Escape, itemView);
+addAction(selectAction);
+addAction(cancelAction);
+#endif
+}
+/*!
+Returns the spacing between the items in the view.
+*/
+int QComboBoxPrivateContainer::spacing() const
+{
+QListView *lview = qobject_cast<QListView*>(view);
+if (lview)
+return lview->spacing();
+#ifndef QT_NO_TABLEVIEW
+QTableView *tview = qobject_cast<QTableView*>(view);
+if (tview)
+return tview->showGrid() ? 1 : 0;
+#endif
+return 0;
+}
+void QComboBoxPrivateContainer::updateTopBottomMargin()
+{
+if (!layout() || layout()->count() < 1)
+return;
+QBoxLayout *boxLayout = qobject_cast<QBoxLayout *>(layout());
+if (!boxLayout)
+return;
+const QStyleOptionComboBox opt = comboStyleOption();
+const bool usePopup = combo->style()->styleHint(QStyle::SH_ComboBox_Popup, &opt, combo);
+const int margin = usePopup ? combo->style()->pixelMetric(QStyle::PM_MenuVMargin, &opt, combo) : 0;
+QSpacerItem *topSpacer = boxLayout->itemAt(0)->spacerItem();
+if (topSpacer)
+topSpacer->changeSize(0, margin, QSizePolicy::Minimum, QSizePolicy::Fixed);
+QSpacerItem *bottomSpacer = boxLayout->itemAt(boxLayout->count() - 1)->spacerItem();
+if (bottomSpacer && bottomSpacer != topSpacer)
+bottomSpacer->changeSize(0, margin, QSizePolicy::Minimum, QSizePolicy::Fixed);
+boxLayout->invalidate();
+}
+void QComboBoxPrivateContainer::changeEvent(QEvent *e)
+{
+if (e->type() == QEvent::StyleChange) {
+QStyleOptionComboBox opt = comboStyleOption();
+view->setMouseTracking(combo->style()->styleHint(QStyle::SH_ComboBox_ListMouseTracking, &opt, combo) ||
+combo->style()->styleHint(QStyle::SH_ComboBox_Popup, &opt, combo));
+setFrameStyle(combo->style()->styleHint(QStyle::SH_ComboBox_PopupFrameStyle, &opt, combo));
+#ifdef QT_SOFTKEYS_ENABLED
+} else if (e->type() == QEvent::LanguageChange) {
+selectAction->setText(QSoftKeyManager::standardSoftKeyText(QSoftKeyManager::SelectSoftKey));
+cancelAction->setText(QSoftKeyManager::standardSoftKeyText(QSoftKeyManager::CancelSoftKey));
+#endif
+}
+QWidget::changeEvent(e);
+}
+bool QComboBoxPrivateContainer::eventFilter(QObject *o, QEvent *e)
+{
+switch (e->type()) {
+case QEvent::ShortcutOverride:
+switch (static_cast<QKeyEvent*>(e)->key()) {
+case Qt::Key_Enter:
+case Qt::Key_Return:
+#ifdef QT_KEYPAD_NAVIGATION
+case Qt::Key_Select:
+#endif
+if (view->currentIndex().isValid() && (view->currentIndex().flags() & Qt::ItemIsEnabled) ) {
+combo->hidePopup();
+emit itemSelected(view->currentIndex());
+}
+return true;
+case Qt::Key_Down:
+if (!(static_cast<QKeyEvent*>(e)->modifiers() & Qt::AltModifier))
+break;
+// fall through
+case Qt::Key_F4:
+case Qt::Key_Escape:
+combo->hidePopup();
+return true;
+default:
+break;
+}
+break;
+case QEvent::MouseMove:
+if (isVisible()) {
+QMouseEvent *m = static_cast<QMouseEvent *>(e);
+QWidget *widget = static_cast<QWidget *>(o);
+QPoint vector = widget->mapToGlobal(m->pos()) - initialClickPosition;
+if (vector.manhattanLength() > 9 && blockMouseReleaseTimer.isActive())
+blockMouseReleaseTimer.stop();
+QModelIndex indexUnderMouse = view->indexAt(m->pos());
+if (indexUnderMouse.isValid() && indexUnderMouse != view->currentIndex()
+&& !QComboBoxDelegate::isSeparator(indexUnderMouse)) {
+view->setCurrentIndex(indexUnderMouse);
+}
+}
+break;
+case QEvent::MouseButtonRelease: {
+QMouseEvent *m = static_cast<QMouseEvent *>(e);
+if (isVisible() && view->rect().contains(m->pos()) && view->currentIndex().isValid()
+&& !blockMouseReleaseTimer.isActive()
+&& (view->currentIndex().flags() & Qt::ItemIsEnabled)
+&& (view->currentIndex().flags() & Qt::ItemIsSelectable)) {
+combo->hidePopup();
+emit itemSelected(view->currentIndex());
+return true;
+}
+break;
+}
+default:
+break;
+}
+return QFrame::eventFilter(o, e);
+}
+void QComboBoxPrivateContainer::showEvent(QShowEvent *)
+{
+combo->update();
+}
+void QComboBoxPrivateContainer::hideEvent(QHideEvent *)
+{
+emit resetButton();
+combo->update();
+}
+void QComboBoxPrivateContainer::mousePressEvent(QMouseEvent *e)
+{
+QStyleOptionComboBox opt = comboStyleOption();
+opt.subControls = QStyle::SC_All;
+opt.activeSubControls = QStyle::SC_ComboBoxArrow;
+QStyle::SubControl sc = combo->style()->hitTestComplexControl(QStyle::CC_ComboBox, &opt,
+combo->mapFromGlobal(e->globalPos()),
+combo);
+if ((combo->isEditable() && sc == QStyle::SC_ComboBoxArrow)
+|| (!combo->isEditable() && sc != QStyle::SC_None))
+setAttribute(Qt::WA_NoMouseReplay);
+combo->hidePopup();
+}
+void QComboBoxPrivateContainer::mouseReleaseEvent(QMouseEvent *e)
+{
+Q_UNUSED(e);
+if (!blockMouseReleaseTimer.isActive()){
+combo->hidePopup();
+emit resetButton();
+}
+}
+QStyleOptionComboBox QComboBoxPrivateContainer::comboStyleOption() const
+{
+// ### This should use QComboBox's initStyleOption(), but it's protected
+// perhaps, we could cheat by having the QCombo private instead?
+QStyleOptionComboBox opt;
+opt.initFrom(combo);
+opt.subControls = QStyle::SC_All;
+opt.activeSubControls = QStyle::SC_None;
+opt.editable = combo->isEditable();
+return opt;
+}
+/*!
+\enum QComboBox::InsertPolicy
+This enum specifies what the QComboBox should do when a new string is
+entered by the user.
+\value NoInsert             The string will not be inserted into the combobox.
+\value InsertAtTop          The string will be inserted as the first item in the combobox.
+\value InsertAtCurrent      The current item will be \e replaced by the string.
+\value InsertAtBottom       The string will be inserted after the last item in the combobox.
+\value InsertAfterCurrent   The string is inserted after the current item in the combobox.
+\value InsertBeforeCurrent  The string is inserted before the current item in the combobox.
+\value InsertAlphabetically The string is inserted in the alphabetic order in the combobox.
+\omitvalue NoInsertion
+\omitvalue AtTop
+\omitvalue AtCurrent
+\omitvalue AtBottom
+\omitvalue AfterCurrent
+\omitvalue BeforeCurrent
+*/
+/*!
+\enum QComboBox::SizeAdjustPolicy
+This enum specifies how the size hint of the QComboBox should
+adjust when new content is added or content changes.
+\value AdjustToContents              The combobox will always adjust to the contents
+\value AdjustToContentsOnFirstShow   The combobox will adjust to its contents the first time it is shown.
+\value AdjustToMinimumContentsLength Use AdjustToContents or AdjustToContentsOnFirstShow instead.
+\value AdjustToMinimumContentsLengthWithIcon The combobox will adjust to \l minimumContentsLength plus space for an icon. For performance reasons use this policy on large models.
+*/
+/*!
+\fn void QComboBox::activated(int index)
+This signal is sent when the user chooses an item in the combobox.
+The item's \a index is passed. Note that this signal is sent even
+when the choice is not changed. If you need to know when the
+choice actually changes, use signal currentIndexChanged().
+*/
+/*!
+\fn void QComboBox::activated(const QString &text)
+This signal is sent when the user chooses an item in the combobox.
+The item's \a text is passed. Note that this signal is sent even
+when the choice is not changed. If you need to know when the
+choice actually changes, use signal currentIndexChanged().
+*/
+/*!
+\fn void QComboBox::highlighted(int index)
+This signal is sent when an item in the combobox popup list is
+highlighted by the user. The item's \a index is passed.
+*/
+/*!
+\fn void QComboBox::highlighted(const QString &text)
+This signal is sent when an item in the combobox popup list is
+highlighted by the user. The item's \a text is passed.
+*/
+/*!
+\fn void QComboBox::currentIndexChanged(int index)
+\since 4.1
+This signal is sent whenever the currentIndex in the combobox
+changes either through user interaction or programmatically. The
+item's \a index is passed or -1 if the combobox becomes empty or the
+currentIndex was reset.
+*/
+/*!
+\fn void QComboBox::currentIndexChanged(const QString &text)
+\since 4.1
+This signal is sent whenever the currentIndex in the combobox
+changes either through user interaction or programmatically.  The
+item's \a text is passed.
+*/
+/*!
+Constructs a combobox with the given \a parent, using the default
+model QStandardItemModel.
+*/
+QComboBox::QComboBox(QWidget *parent)
+: QWidget(*new QComboBoxPrivate(), parent, 0)
+{
+Q_D(QComboBox);
+d->init();
+}
+/*!
+\internal
+*/
+QComboBox::QComboBox(QComboBoxPrivate &dd, QWidget *parent)
+: QWidget(dd, parent, 0)
+{
+Q_D(QComboBox);
+d->init();
+}
+#ifdef QT3_SUPPORT
+/*!
+Use one of the constructors that doesn't take the \a name
+argument and then use setObjectName() instead.
+*/
+QComboBox::QComboBox(QWidget *parent, const char *name)
+: QWidget(*new QComboBoxPrivate(), parent, 0)
+{
+Q_D(QComboBox);
+d->init();
+setObjectName(QString::fromAscii(name));
+}
+/*!
+Use one of the constructors that doesn't take the \a name
+argument and then use setObjectName() instead.
+*/
+QComboBox::QComboBox(bool rw, QWidget *parent, const char *name)
+: QWidget(*new QComboBoxPrivate(), parent, 0)
+{
+Q_D(QComboBox);
+d->init();
+setEditable(rw);
+setObjectName(QString::fromAscii(name));
+}
+#endif //QT3_SUPPORT
+/*!
+\class QComboBox
+\brief The QComboBox widget is a combined button and popup list.
+\ingroup basicwidgets
+A QComboBox provides a means of presenting a list of options to the user
+in a way that takes up the minimum amount of screen space.
+A combobox is a selection widget that displays the current item,
+and can pop up a list of selectable items. A combobox may be editable,
+allowing the user to modify each item in the list.
+Comboboxes can contain pixmaps as well as strings; the
+insertItem() and setItemText() functions are suitably overloaded.
+For editable comboboxes, the function clearEditText() is provided,
+to clear the displayed string without changing the combobox's
+contents.
+There are two signals emitted if the current item of a combobox
+changes, currentIndexChanged() and activated().
+currentIndexChanged() is always emitted regardless if the change
+was done programmatically or by user interaction, while
+activated() is only emitted when the change is caused by user
+interaction. The highlighted() signal is emitted when the user
+highlights an item in the combobox popup list. All three signals
+exist in two versions, one with a QString argument and one with an
+\c int argument. If the user selectes or highlights a pixmap, only
+the \c int signals are emitted. Whenever the text of an editable
+combobox is changed the editTextChanged() signal is emitted.
+When the user enters a new string in an editable combobox, the
+widget may or may not insert it, and it can insert it in several
+locations. The default policy is is \l AtBottom but you can change
+this using setInsertPolicy().
+It is possible to constrain the input to an editable combobox
+using QValidator; see setValidator(). By default, any input is
+accepted.
+A combobox can be populated using the insert functions,
+insertItem() and insertItems() for example. Items can be
+changed with setItemText(). An item can be removed with
+removeItem() and all items can be removed with clear(). The text
+of the current item is returned by currentText(), and the text of
+a numbered item is returned with text(). The current item can be
+set with setCurrentIndex(). The number of items in the combobox is
+returned by count(); the maximum number of items can be set with
+setMaxCount(). You can allow editing using setEditable(). For
+editable comboboxes you can set auto-completion using
+setCompleter() and whether or not the user can add duplicates
+is set with setDuplicatesEnabled().
+QComboBox uses the \l{Model/View Programming}{model/view
+framework} for its popup list and to store its items.  By default
+a QStandardItemModel stores the items and a QListView subclass
+displays the popuplist. You can access the model and view directly
+(with model() and view()), but QComboBox also provides functions
+to set and get item data (e.g., setItemData() and itemText()). You
+can also set a new model and view (with setModel() and setView()).
+For the text and icon in the combobox label, the data in the model
+that has the Qt::DisplayRole and Qt::DecorationRole is used.
+\image qstyle-comboboxes.png Comboboxes in the different built-in styles.
+\sa QLineEdit, QSpinBox, QRadioButton, QButtonGroup,
+{fowler}{GUI Design Handbook: Combo Box, Drop-Down List Box}
+*/
+void QComboBoxPrivate::init()
+{
+Q_Q(QComboBox);
+q->setFocusPolicy(Qt::WheelFocus);
+q->setSizePolicy(QSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed,
+QSizePolicy::ComboBox));
+setLayoutItemMargins(QStyle::SE_ComboBoxLayoutItem);
+q->setModel(new QStandardItemModel(0, 1, q));
+if (!q->isEditable())
+q->setAttribute(Qt::WA_InputMethodEnabled, false);
+else
+q->setAttribute(Qt::WA_InputMethodEnabled);
+}
+QComboBoxPrivateContainer* QComboBoxPrivate::viewContainer()
+{
+if (container)
+return container;
+Q_Q(QComboBox);
+container = new QComboBoxPrivateContainer(new QComboBoxListView(q), q);
+container->itemView()->setModel(model);
+container->itemView()->setTextElideMode(Qt::ElideMiddle);
+updateDelegate(true);
+updateLayoutDirection();
+updateViewContainerPaletteAndOpacity();
+QObject::connect(container, SIGNAL(itemSelected(QModelIndex)),
+q, SLOT(_q_itemSelected(QModelIndex)));
+QObject::connect(container->itemView()->selectionModel(),
+SIGNAL(currentChanged(QModelIndex,QModelIndex)),
+q, SLOT(_q_emitHighlighted(QModelIndex)));
+QObject::connect(container, SIGNAL(resetButton()), q, SLOT(_q_resetButton()));
+return container;
+}
+void QComboBoxPrivate::_q_resetButton()
+{
+updateArrow(QStyle::State_None);
+}
+void QComboBoxPrivate::_q_dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight)
+{
+Q_Q(QComboBox);
+if (inserting || topLeft.parent() != root)
+return;
+if (sizeAdjustPolicy == QComboBox::AdjustToContents) {
+sizeHint = QSize();
+adjustComboBoxSize();
+q->updateGeometry();
+}
+if (currentIndex.row() >= topLeft.row() && currentIndex.row() <= bottomRight.row()) {
+if (lineEdit) {
+lineEdit->setText(q->itemText(currentIndex.row()));
+updateLineEditGeometry();
+}
+q->update();
+}
+}
+void QComboBoxPrivate::_q_rowsInserted(const QModelIndex &parent, int start, int end)
+{
+Q_Q(QComboBox);
+if (inserting || parent != root)
+return;
+if (sizeAdjustPolicy == QComboBox::AdjustToContents) {
+sizeHint = QSize();
+adjustComboBoxSize();
+q->updateGeometry();
+}
+// set current index if combo was previously empty
+if (start == 0 && (end - start + 1) == q->count() && !currentIndex.isValid()) {
+q->setCurrentIndex(0);
+// need to emit changed if model updated index "silently"
+} else if (currentIndex.row() != indexBeforeChange) {
+q->update();
+_q_emitCurrentIndexChanged(currentIndex);
+}
+}
+void QComboBoxPrivate::_q_updateIndexBeforeChange()
+{
+indexBeforeChange = currentIndex.row();
+}
+void QComboBoxPrivate::_q_rowsRemoved(const QModelIndex &parent, int /*start*/, int /*end*/)
+{
+Q_Q(QComboBox);
+if (parent != root)
+return;
+if (sizeAdjustPolicy == QComboBox::AdjustToContents) {
+sizeHint = QSize();
+adjustComboBoxSize();
+q->updateGeometry();
+}
+// model has changed the currentIndex
+if (currentIndex.row() != indexBeforeChange) {
+if (!currentIndex.isValid() && q->count()) {
+q->setCurrentIndex(qMin(q->count() - 1, qMax(indexBeforeChange, 0)));
+return;
+}
+if (lineEdit) {
+lineEdit->setText(q->itemText(currentIndex.row()));
+updateLineEditGeometry();
+}
+q->update();
+_q_emitCurrentIndexChanged(currentIndex);
+}
+}
+void QComboBoxPrivate::updateViewContainerPaletteAndOpacity()
+{
+if (!container)
+return;
+Q_Q(QComboBox);
+QStyleOptionComboBox opt;
+q->initStyleOption(&opt);
+#ifndef QT_NO_MENU
+if (q->style()->styleHint(QStyle::SH_ComboBox_Popup, &opt, q)) {
+QMenu menu;
+menu.ensurePolished();
+container->setPalette(menu.palette());
+container->setWindowOpacity(menu.windowOpacity());
+} else
+#endif
+{
+container->setPalette(q->palette());
+container->setWindowOpacity(1.0);
+}
+}
+/*!
+Initialize \a option with the values from this QComboBox. This method
+is useful for subclasses when they need a QStyleOptionComboBox, but don't want
+to fill in all the information themselves.
+\sa QStyleOption::initFrom()
+*/
+void QComboBox::initStyleOption(QStyleOptionComboBox *option) const
+{
+if (!option)
+return;
+Q_D(const QComboBox);
+option->initFrom(this);
+option->editable = isEditable();
+option->frame = d->frame;
+if (hasFocus() && !option->editable)
+option->state |= QStyle::State_Selected;
+option->subControls = QStyle::SC_All;
+if (d->arrowState == QStyle::State_Sunken) {
+option->activeSubControls = QStyle::SC_ComboBoxArrow;
+option->state |= d->arrowState;
+} else {
+option->activeSubControls = d->hoverControl;
+}
+if (d->currentIndex.isValid()) {
+option->currentText = currentText();
+option->currentIcon = d->itemIcon(d->currentIndex);
+}
+option->iconSize = iconSize();
+if (d->container && d->container->isVisible())
+option->state |= QStyle::State_On;
+}
+void QComboBoxPrivate::updateLineEditGeometry()
+{
+if (!lineEdit)
+return;
+Q_Q(QComboBox);
+QStyleOptionComboBox opt;
+q->initStyleOption(&opt);
+QRect editRect = q->style()->subControlRect(QStyle::CC_ComboBox, &opt,
+QStyle::SC_ComboBoxEditField, q);
+if (!q->itemIcon(q->currentIndex()).isNull()) {
+QRect comboRect(editRect);
+editRect.setWidth(editRect.width() - q->iconSize().width() - 4);
+editRect = QStyle::alignedRect(q->layoutDirection(), Qt::AlignRight,
+editRect.size(), comboRect);
+}
+lineEdit->setGeometry(editRect);
+}
+Qt::MatchFlags QComboBoxPrivate::matchFlags() const
+{
+// Base how duplicates are determined on the autocompletion case sensitivity
+Qt::MatchFlags flags = Qt::MatchFixedString;
+#ifndef QT_NO_COMPLETER
+if (!lineEdit->completer() || lineEdit->completer()->caseSensitivity() == Qt::CaseSensitive)
+#endif
+flags |= Qt::MatchCaseSensitive;
+return flags;
+}
+void QComboBoxPrivate::_q_editingFinished()
+{
+Q_Q(QComboBox);
+if (lineEdit && !lineEdit->text().isEmpty()) {
+//here we just check if the current item was entered
+const int index = q_func()->findText(lineEdit->text(), matchFlags());
+if (index != -1 && itemText(currentIndex) != lineEdit->text()) {
+q->setCurrentIndex(index);
+emitActivated(currentIndex);
+}
+}
+}
+void QComboBoxPrivate::_q_returnPressed()
+{
+Q_Q(QComboBox);
+if (lineEdit && !lineEdit->text().isEmpty()) {
+if (q->count() >= maxCount && !(this->insertPolicy == QComboBox::InsertAtCurrent))
+return;
+lineEdit->deselect();
+lineEdit->end(false);
+QString text = lineEdit->text();
+// check for duplicates (if not enabled) and quit
+int index = -1;
+if (!duplicatesEnabled) {
+index = q->findText(text, matchFlags());
+if (index != -1) {
+q->setCurrentIndex(index);
+emitActivated(currentIndex);
+return;
+}
+}
+switch (insertPolicy) {
+case QComboBox::InsertAtTop:
+index = 0;
+break;
+case QComboBox::InsertAtBottom:
+index = q->count();
+break;
+case QComboBox::InsertAtCurrent:
+case QComboBox::InsertAfterCurrent:
+case QComboBox::InsertBeforeCurrent:
+if (!q->count() || !currentIndex.isValid())
+index = 0;
+else if (insertPolicy == QComboBox::InsertAtCurrent)
+q->setItemText(q->currentIndex(), text);
+else if (insertPolicy == QComboBox::InsertAfterCurrent)
+index = q->currentIndex() + 1;
+else if (insertPolicy == QComboBox::InsertBeforeCurrent)
+index = q->currentIndex();
+break;
+case QComboBox::InsertAlphabetically:
+index = 0;
+for (int i=0; i< q->count(); i++, index++ ) {
+if (text.toLower() < q->itemText(i).toLower())
+break;
+}
+break;
+case QComboBox::NoInsert:
+default:
+break;
+}
+if (index >= 0) {
+q->insertItem(index, text);
+q->setCurrentIndex(index);
+emitActivated(currentIndex);
+}
+}
+}
+void QComboBoxPrivate::_q_itemSelected(const QModelIndex &item)
+{
+Q_Q(QComboBox);
+if (item != currentIndex) {
+setCurrentIndex(item);
+} else if (lineEdit) {
+lineEdit->selectAll();
+lineEdit->setText(q->itemText(currentIndex.row()));
+}
+emitActivated(currentIndex);
+}
+void QComboBoxPrivate::emitActivated(const QModelIndex &index)
+{
+Q_Q(QComboBox);
+if (!index.isValid())
+return;
+QString text(itemText(index));
+emit q->activated(index.row());
+emit q->activated(text);
+}
+void QComboBoxPrivate::_q_emitHighlighted(const QModelIndex &index)
+{
+Q_Q(QComboBox);
+if (!index.isValid())
+return;
+QString text(itemText(index));
+emit q->highlighted(index.row());
+emit q->highlighted(text);
+}
+void QComboBoxPrivate::_q_emitCurrentIndexChanged(const QModelIndex &index)
+{
+Q_Q(QComboBox);
+emit q->currentIndexChanged(index.row());
+emit q->currentIndexChanged(itemText(index));
+}
+QString QComboBoxPrivate::itemText(const QModelIndex &index) const
+{
+return index.isValid() ? model->data(index, itemRole()).toString() : QString();
+}
+int QComboBoxPrivate::itemRole() const
+{
+return q_func()->isEditable() ? Qt::EditRole : Qt::DisplayRole;
+}
+/*!
+Destroys the combobox.
+*/
+QComboBox::~QComboBox()
+{
+// ### check delegateparent and delete delegate if us?
+Q_D(QComboBox);
+QT_TRY {
+disconnect(d->model, SIGNAL(destroyed()),
+this, SLOT(_q_modelDestroyed()));
+} QT_CATCH(...) {
+; // objects can't throw in destructor
+}
+}
+/*!
+\property QComboBox::maxVisibleItems
+\brief the maximum allowed size on screen of the combo box, measured in items
+By default, this property has a value of 10.
+\note This property is ignored for non-editable comboboxes in Mac style.
+*/
+int QComboBox::maxVisibleItems() const
+{
+Q_D(const QComboBox);
+return d->maxVisibleItems;
+}
+void QComboBox::setMaxVisibleItems(int maxItems)
+{
+Q_D(QComboBox);
+if (maxItems < 0) {
+qWarning("QComboBox::setMaxVisibleItems: "
+"Invalid max visible items (%d) must be >= 0", maxItems);
+return;
+}
+d->maxVisibleItems = maxItems;
+}
+/*!
+\property QComboBox::count
+\brief the number of items in the combobox
+By default, for an empty combo box, this property has a value of 0.
+*/
+int QComboBox::count() const
+{
+Q_D(const QComboBox);
+return d->model->rowCount(d->root);
+}
+/*!
+\property QComboBox::maxCount
+\brief the maximum number of items allowed in the combobox
+\note If you set the maximum number to be less then the current
+amount of items in the combobox, the extra items will be
+truncated. This also applies if you have set an external model on
+the combobox.
+By default, this property's value is derived from the highest
+signed integer available (typically 2147483647).
+*/
+void QComboBox::setMaxCount(int max)
+{
+Q_D(QComboBox);
+if (max < 0) {
+qWarning("QComboBox::setMaxCount: Invalid count (%d) must be >= 0", max);
+return;
+}
+if (max < count())
+d->model->removeRows(max, count() - max, d->root);
+d->maxCount = max;
+}
+int QComboBox::maxCount() const
+{
+Q_D(const QComboBox);
+return d->maxCount;
+}
+#ifndef QT_NO_COMPLETER
+/*!
+\property QComboBox::autoCompletion
+\brief whether the combobox provides auto-completion for editable items
+\since 4.1
+\obsolete
+Use setCompleter() instead.
+By default, this property is true.
+\sa editable
+*/
+/*!
+\obsolete
+Use setCompleter() instead.
+*/
+bool QComboBox::autoCompletion() const
+{
+Q_D(const QComboBox);
+return d->autoCompletion;
+}
+/*!
+\obsolete
+Use setCompleter() instead.
+*/
+void QComboBox::setAutoCompletion(bool enable)
+{
+Q_D(QComboBox);
+#ifdef QT_KEYPAD_NAVIGATION
+if (QApplication::keypadNavigationEnabled() && !enable && isEditable())
+qWarning("QComboBox::setAutoCompletion: auto completion is mandatory when combo box editable");
+#endif
+d->autoCompletion = enable;
+if (!d->lineEdit)
+return;
+if (enable) {
+if (d->lineEdit->completer())
+return;
+d->completer = new QCompleter(d->model, d->lineEdit);
+d->completer->setCaseSensitivity(d->autoCompletionCaseSensitivity);
+d->completer->setCompletionMode(QCompleter::InlineCompletion);
+d->completer->setCompletionColumn(d->modelColumn);
+d->lineEdit->setCompleter(d->completer);
+d->completer->setWidget(this);
+} else {
+d->lineEdit->setCompleter(0);
+}
+}
+/*!
+\property QComboBox::autoCompletionCaseSensitivity
+\brief whether string comparisons are case-sensitive or case-insensitive for auto-completion
+\obsolete
+By default, this property is Qt::CaseInsensitive.
+Use setCompleter() instead. Case sensitivity of the auto completion can be
+changed using QCompleter::setCaseSensitivity().
+\sa autoCompletion
+*/
+/*!
+\obsolete
+Use setCompleter() and QCompleter::setCaseSensitivity() instead.
+*/
+Qt::CaseSensitivity QComboBox::autoCompletionCaseSensitivity() const
+{
+Q_D(const QComboBox);
+return d->autoCompletionCaseSensitivity;
+}
+/*!
+\obsolete
+Use setCompleter() and QCompleter::setCaseSensitivity() instead.
+*/
+void QComboBox::setAutoCompletionCaseSensitivity(Qt::CaseSensitivity sensitivity)
+{
+Q_D(QComboBox);
+d->autoCompletionCaseSensitivity = sensitivity;
+if (d->lineEdit && d->lineEdit->completer())
+d->lineEdit->completer()->setCaseSensitivity(sensitivity);
+}
+#endif // QT_NO_COMPLETER
+/*!
+\property QComboBox::duplicatesEnabled
+\brief whether the user can enter duplicate items into the combobox
+Note that it is always possible to programmatically insert duplicate items into the
+combobox.
+By default, this property is false (duplicates are not allowed).
+*/
+bool QComboBox::duplicatesEnabled() const
+{
+Q_D(const QComboBox);
+return d->duplicatesEnabled;
+}
+void QComboBox::setDuplicatesEnabled(bool enable)
+{
+Q_D(QComboBox);
+d->duplicatesEnabled = enable;
+}
+/*!  \fn int QComboBox::findText(const QString &text, Qt::MatchFlags flags = Qt::MatchExactly|Qt::MatchCaseSensitive) const
+Returns the index of the item containing the given \a text; otherwise
+returns -1.
+The \a flags specify how the items in the combobox are searched.
+*/
+/*!
+Returns the index of the item containing the given \a data for the
+given \a role; otherwise returns -1.
+The \a flags specify how the items in the combobox are searched.
+*/
+int QComboBox::findData(const QVariant &data, int role, Qt::MatchFlags flags) const
+{
+Q_D(const QComboBox);
+QModelIndexList result;
+QModelIndex start = d->model->index(0, d->modelColumn, d->root);
+result = d->model->match(start, role, data, 1, flags);
+if (result.isEmpty())
+return -1;
+return result.first().row();
+}
+/*!
+\property QComboBox::insertPolicy
+\brief the policy used to determine where user-inserted items should
+appear in the combobox
+The default value is \l AtBottom, indicating that new items will appear
+at the bottom of the list of items.
+\sa InsertPolicy
+*/
+QComboBox::InsertPolicy QComboBox::insertPolicy() const
+{
+Q_D(const QComboBox);
+return d->insertPolicy;
+}
+void QComboBox::setInsertPolicy(InsertPolicy policy)
+{
+Q_D(QComboBox);
+d->insertPolicy = policy;
+}
+/*!
+\property QComboBox::sizeAdjustPolicy
+\brief the policy describing how the size of the combobox changes
+when the content changes
+The default value is \l AdjustToContentsOnFirstShow.
+\sa SizeAdjustPolicy
+*/
+QComboBox::SizeAdjustPolicy QComboBox::sizeAdjustPolicy() const
+{
+Q_D(const QComboBox);
+return d->sizeAdjustPolicy;
+}
+void QComboBox::setSizeAdjustPolicy(QComboBox::SizeAdjustPolicy policy)
+{
+Q_D(QComboBox);
+if (policy == d->sizeAdjustPolicy)
+return;
+d->sizeAdjustPolicy = policy;
+d->sizeHint = QSize();
+d->adjustComboBoxSize();
+updateGeometry();
+}
+/*!
+\property QComboBox::minimumContentsLength
+\brief the minimum number of characters that should fit into the combobox.
+The default value is 0.
+If this property is set to a positive value, the
+minimumSizeHint() and sizeHint() take it into account.
+\sa sizeAdjustPolicy
+*/
+int QComboBox::minimumContentsLength() const
+{
+Q_D(const QComboBox);
+return d->minimumContentsLength;
+}
+void QComboBox::setMinimumContentsLength(int characters)
+{
+Q_D(QComboBox);
+if (characters == d->minimumContentsLength || characters < 0)
+return;
+d->minimumContentsLength = characters;
+if (d->sizeAdjustPolicy == AdjustToContents
+|| d->sizeAdjustPolicy == AdjustToMinimumContentsLength
+|| d->sizeAdjustPolicy == AdjustToMinimumContentsLengthWithIcon) {
+d->sizeHint = QSize();
+d->adjustComboBoxSize();
+updateGeometry();
+}
+}
+/*!
+\property QComboBox::iconSize
+\brief the size of the icons shown in the combobox.
+Unless explicitly set this returns the default value of the
+current style.  This size is the maximum size that icons can have;
+icons of smaller size are not scaled up.
+*/
+QSize QComboBox::iconSize() const
+{
+Q_D(const QComboBox);
+if (d->iconSize.isValid())
+return d->iconSize;
+int iconWidth = style()->pixelMetric(QStyle::PM_SmallIconSize, 0, this);
+return QSize(iconWidth, iconWidth);
+}
+void QComboBox::setIconSize(const QSize &size)
+{
+Q_D(QComboBox);
+if (size == d->iconSize)
+return;
+view()->setIconSize(size);
+d->iconSize = size;
+d->sizeHint = QSize();
+updateGeometry();
+}
+/*!
+\property QComboBox::editable
+\brief whether the combo box can be edited by the user
+By default, this property is false.
+*/
+bool QComboBox::isEditable() const
+{
+Q_D(const QComboBox);
+return d->lineEdit != 0;
+}
+/*! \internal
+update the default delegate
+depending on the style's SH_ComboBox_Popup hint, we use a different default delegate.
+but we do not change the delegate is the combobox use a custom delegate,
+unless \a force is set to true.
+*/
+void QComboBoxPrivate::updateDelegate(bool force)
+{
+Q_Q(QComboBox);
+QStyleOptionComboBox opt;
+q->initStyleOption(&opt);
+if (q->style()->styleHint(QStyle::SH_ComboBox_Popup, &opt, q)) {
+if (force || qobject_cast<QComboBoxDelegate *>(q->itemDelegate()))
+q->setItemDelegate(new QComboMenuDelegate(q->view(), q));
+} else {
+if (force || qobject_cast<QComboMenuDelegate *>(q->itemDelegate()))
+q->setItemDelegate(new QComboBoxDelegate(q->view(), q));
+}
+}
+QIcon QComboBoxPrivate::itemIcon(const QModelIndex &index) const
+{
+QVariant decoration = model->data(index, Qt::DecorationRole);
+if (decoration.type() == QVariant::Pixmap)
+return QIcon(qvariant_cast<QPixmap>(decoration));
+else
+return qvariant_cast<QIcon>(decoration);
+}
+void QComboBox::setEditable(bool editable)
+{
+Q_D(QComboBox);
+if (isEditable() == editable)
+return;
+d->updateDelegate();
+QStyleOptionComboBox opt;
+initStyleOption(&opt);
+if (editable) {
+if (style()->styleHint(QStyle::SH_ComboBox_Popup, &opt, this)) {
+d->viewContainer()->updateScrollers();
+view()->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
+}
+QLineEdit *le = new QLineEdit(this);
+setLineEdit(le);
+} else {
+if (style()->styleHint(QStyle::SH_ComboBox_Popup, &opt, this)) {
+d->viewContainer()->updateScrollers();
+view()->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+}
+setAttribute(Qt::WA_InputMethodEnabled, false);
+d->lineEdit->hide();
+d->lineEdit->deleteLater();
+d->lineEdit = 0;
+}
+d->viewContainer()->updateTopBottomMargin();
+if (!testAttribute(Qt::WA_Resized))
+adjustSize();
+}
+/*!
+Sets the line \a edit to use instead of the current line edit widget.
+The combo box takes ownership of the line edit.
+*/
+void QComboBox::setLineEdit(QLineEdit *edit)
+{
+Q_D(QComboBox);
+if (!edit) {
+qWarning("QComboBox::setLineEdit: cannot set a 0 line edit");
+return;
+}
+if (edit == d->lineEdit)
+return;
+edit->setText(currentText());
+delete d->lineEdit;
+d->lineEdit = edit;
+if (d->lineEdit->parent() != this)
+d->lineEdit->setParent(this);
+connect(d->lineEdit, SIGNAL(returnPressed()), this, SLOT(_q_returnPressed()));
+connect(d->lineEdit, SIGNAL(editingFinished()), this, SLOT(_q_editingFinished()));
+connect(d->lineEdit, SIGNAL(textChanged(QString)), this, SIGNAL(editTextChanged(QString)));
+#ifdef QT3_SUPPORT
+connect(d->lineEdit, SIGNAL(textChanged(QString)), this, SIGNAL(textChanged(QString)));
+#endif
+d->lineEdit->setFrame(false);
+d->lineEdit->setContextMenuPolicy(Qt::NoContextMenu);
+d->lineEdit->setFocusProxy(this);
+d->lineEdit->setAttribute(Qt::WA_MacShowFocusRect, false);
+#ifndef QT_NO_COMPLETER
+setAutoCompletion(d->autoCompletion);
+#endif
+#ifdef QT_KEYPAD_NAVIGATION
+#ifndef QT_NO_COMPLETER
+if (QApplication::keypadNavigationEnabled()) {
+// Editable combo boxes will have a completer that is set to UnfilteredPopupCompletion.
+// This means that when the user enters edit mode they are immediately presented with a
+// list of possible completions.
+setAutoCompletion(true);
+if (d->completer) {
+d->completer->setCompletionMode(QCompleter::UnfilteredPopupCompletion);
+connect(d->completer, SIGNAL(activated(QModelIndex)), this, SLOT(_q_completerActivated()));
+}
+}
+#endif
+#endif
+setAttribute(Qt::WA_InputMethodEnabled);
+d->updateLayoutDirection();
+d->updateLineEditGeometry();
+if (isVisible())
+d->lineEdit->show();
+update();
+}
+/*!
+Returns the line edit used to edit items in the combobox, or 0 if there
+is no line edit.
+Only editable combo boxes have a line edit.
+*/
+QLineEdit *QComboBox::lineEdit() const
+{
+Q_D(const QComboBox);
+return d->lineEdit;
+}
+#ifndef QT_NO_VALIDATOR
+/*!
+\fn void QComboBox::setValidator(const QValidator *validator)
+Sets the \a validator to use instead of the current validator.
+*/
+void QComboBox::setValidator(const QValidator *v)
+{
+Q_D(QComboBox);
+if (d->lineEdit)
+d->lineEdit->setValidator(v);
+}
+/*!
+Returns the validator that is used to constrain text input for the
+combobox.
+\sa editable
+*/
+const QValidator *QComboBox::validator() const
+{
+Q_D(const QComboBox);
+return d->lineEdit ? d->lineEdit->validator() : 0;
+}
+#endif // QT_NO_VALIDATOR
+#ifndef QT_NO_COMPLETER
+/*!
+\fn void QComboBox::setCompleter(QCompleter *completer)
+\since 4.2
+Sets the \a completer to use instead of the current completer.
+If \a completer is 0, auto completion is disabled.
+By default, for an editable combo box, a QCompleter that
+performs case insensitive inline completion is automatically created.
+*/
+void QComboBox::setCompleter(QCompleter *c)
+{
+Q_D(QComboBox);
+if (!d->lineEdit)
+return;
+d->lineEdit->setCompleter(c);
+if (c)
+c->setWidget(this);
+}
+/*!
+\since 4.2
+Returns the completer that is used to auto complete text input for the
+combobox.
+\sa editable
+*/
+QCompleter *QComboBox::completer() const
+{
+Q_D(const QComboBox);
+return d->lineEdit ? d->lineEdit->completer() : 0;
+}
+#endif // QT_NO_COMPLETER
+/*!
+Returns the item delegate used by the popup list view.
+\sa setItemDelegate()
+*/
+QAbstractItemDelegate *QComboBox::itemDelegate() const
+{
+return view()->itemDelegate();
+}
+/*!
+Sets the item \a delegate for the popup list view.
+The combobox takes ownership of the delegate.
+\warning You should not share the same instance of a delegate between comboboxes,
+widget mappers or views. Doing so can cause incorrect or unintuitive editing behavior
+since each view connected to a given delegate may receive the
+\l{QAbstractItemDelegate::}{closeEditor()} signal, and attempt to access, modify or
+close an editor that has already been closed.
+\sa itemDelegate()
+*/
+void QComboBox::setItemDelegate(QAbstractItemDelegate *delegate)
+{
+if (!delegate) {
+qWarning("QComboBox::setItemDelegate: cannot set a 0 delegate");
+return;
+}
+delete view()->itemDelegate();
+view()->setItemDelegate(delegate);
+}
+/*!
+Returns the model used by the combobox.
+*/
+QAbstractItemModel *QComboBox::model() const
+{
+Q_D(const QComboBox);
+if (d->model == QAbstractItemModelPrivate::staticEmptyModel()) {
+QComboBox *that = const_cast<QComboBox*>(this);
+that->setModel(new QStandardItemModel(0, 1, that));
+}
+return d->model;
+}
+/*!
+Sets the model to be \a model. \a model must not be 0.
+If you want to clear the contents of a model, call clear().
+\sa clear()
+*/
+void QComboBox::setModel(QAbstractItemModel *model)
+{
+Q_D(QComboBox);
+if (!model) {
+qWarning("QComboBox::setModel: cannot set a 0 model");
+return;
+}
+#ifndef QT_NO_COMPLETER
+if (d->lineEdit && d->lineEdit->completer()
+&& d->lineEdit->completer() == d->completer)
+d->lineEdit->completer()->setModel(model);
+#endif
+if (d->model) {
+disconnect(d->model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),
+this, SLOT(_q_dataChanged(QModelIndex,QModelIndex)));
+disconnect(d->model, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),
+this, SLOT(_q_updateIndexBeforeChange()));
+disconnect(d->model, SIGNAL(rowsInserted(QModelIndex,int,int)),
+this, SLOT(_q_rowsInserted(QModelIndex,int,int)));
+disconnect(d->model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),
+this, SLOT(_q_updateIndexBeforeChange()));
+disconnect(d->model, SIGNAL(rowsRemoved(QModelIndex,int,int)),
+this, SLOT(_q_rowsRemoved(QModelIndex,int,int)));
+disconnect(d->model, SIGNAL(destroyed()),
+this, SLOT(_q_modelDestroyed()));
+disconnect(d->model, SIGNAL(modelAboutToBeReset()),
+this, SLOT(_q_updateIndexBeforeChange()));
+disconnect(d->model, SIGNAL(modelReset()),
+this, SLOT(_q_modelReset()));
+if (d->model->QObject::parent() == this)
+delete d->model;
+}
+d->model = model;
+connect(model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),
+this, SLOT(_q_dataChanged(QModelIndex,QModelIndex)));
+connect(model, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),
+this, SLOT(_q_updateIndexBeforeChange()));
+connect(model, SIGNAL(rowsInserted(QModelIndex,int,int)),
+this, SLOT(_q_rowsInserted(QModelIndex,int,int)));
+connect(model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),
+this, SLOT(_q_updateIndexBeforeChange()));
+connect(model, SIGNAL(rowsRemoved(QModelIndex,int,int)),
+this, SLOT(_q_rowsRemoved(QModelIndex,int,int)));
+connect(model, SIGNAL(destroyed()),
+this, SLOT(_q_modelDestroyed()));
+connect(model, SIGNAL(modelAboutToBeReset()),
+this, SLOT(_q_updateIndexBeforeChange()));
+connect(model, SIGNAL(modelReset()),
+this, SLOT(_q_modelReset()));
+if (d->container)
+d->container->itemView()->setModel(model);
+bool currentReset = false;
+if (count()) {
+for (int pos=0; pos < count(); pos++) {
+if (d->model->index(pos, d->modelColumn, d->root).flags() & Qt::ItemIsEnabled) {
+setCurrentIndex(pos);
+currentReset = true;
+break;
+}
+}
+}
+if (!currentReset)
+setCurrentIndex(-1);
+d->modelChanged();
+}
+/*!
+Returns the root model item index for the items in the combobox.
+\sa setRootModelIndex()
+*/
+QModelIndex QComboBox::rootModelIndex() const
+{
+Q_D(const QComboBox);
+return QModelIndex(d->root);
+}
+/*!
+Sets the root model item \a index for the items in the combobox.
+\sa rootModelIndex()
+*/
+void QComboBox::setRootModelIndex(const QModelIndex &index)
+{
+Q_D(QComboBox);
+d->root = QPersistentModelIndex(index);
+view()->setRootIndex(index);
+update();
+}
+/*!
+\property QComboBox::currentIndex
+\brief the index of the current item in the combobox.
+The current index can change when inserting or removing items.
+By default, for an empty combo box or a combo box in which no current
+item is set, this property has a value of -1.
+*/
+int QComboBox::currentIndex() const
+{
+Q_D(const QComboBox);
+return d->currentIndex.row();
+}
+void QComboBox::setCurrentIndex(int index)
+{
+Q_D(QComboBox);
+QModelIndex mi = d->model->index(index, d->modelColumn, d->root);
+d->setCurrentIndex(mi);
+}
+void QComboBoxPrivate::setCurrentIndex(const QModelIndex &mi)
+{
+Q_Q(QComboBox);
+bool indexChanged = (mi != currentIndex);
+if (indexChanged)
+currentIndex = QPersistentModelIndex(mi);
+if (lineEdit) {
+QString newText = q->itemText(currentIndex.row());
+if (lineEdit->text() != newText)
+lineEdit->setText(newText);
+updateLineEditGeometry();
+}
+if (indexChanged) {
+q->update();
+_q_emitCurrentIndexChanged(currentIndex);
+}
+}
+/*!
+\property QComboBox::currentText
+\brief the text of the current item
+By default, for an empty combo box or a combo box in which no current
+item is set, this property contains an empty string.
+*/
+QString QComboBox::currentText() const
+{
+Q_D(const QComboBox);
+if (d->lineEdit)
+return d->lineEdit->text();
+else if (d->currentIndex.isValid())
+return d->itemText(d->currentIndex);
+else
+return QString();
+}
+/*!
+Returns the text for the given \a index in the combobox.
+*/
+QString QComboBox::itemText(int index) const
+{
+Q_D(const QComboBox);
+QModelIndex mi = d->model->index(index, d->modelColumn, d->root);
+return d->itemText(mi);
+}
+/*!
+Returns the icon for the given \a index in the combobox.
+*/
+QIcon QComboBox::itemIcon(int index) const
+{
+Q_D(const QComboBox);
+QModelIndex mi = d->model->index(index, d->modelColumn, d->root);
+return d->itemIcon(mi);
+}
+/*!
+Returns the data for the given \a role in the given \a index in the
+combobox, or QVariant::Invalid if there is no data for this role.
+*/
+QVariant QComboBox::itemData(int index, int role) const
+{
+Q_D(const QComboBox);
+QModelIndex mi = d->model->index(index, d->modelColumn, d->root);
+return d->model->data(mi, role);
+}
+/*!
+\fn void QComboBox::insertItem(int index, const QString &text, const QVariant &userData)
+Inserts the \a text and \a userData (stored in the Qt::UserRole)
+into the combobox at the given \a index.
+If the index is equal to or higher than the total number of items,
+the new item is appended to the list of existing items. If the
+index is zero or negative, the new item is prepended to the list
+of existing items.
+\sa insertItems()
+*/
+/*!
+Inserts the \a icon, \a text and \a userData (stored in the
+Qt::UserRole) into the combobox at the given \a index.
+If the index is equal to or higher than the total number of items,
+the new item is appended to the list of existing items. If the
+index is zero or negative, the new item is prepended to the list
+of existing items.
+\sa insertItems()
+*/
+void QComboBox::insertItem(int index, const QIcon &icon, const QString &text, const QVariant &userData)
+{
+Q_D(QComboBox);
+int itemCount = count();
+index = qBound(0, index, itemCount);
+if (index >= d->maxCount)
+return;
+// For the common case where we are using the built in QStandardItemModel
+// construct a QStandardItem, reducing the number of expensive signals from the model
+if (QStandardItemModel *m = qobject_cast<QStandardItemModel*>(d->model)) {
+QStandardItem *item = new QStandardItem(text);
+if (!icon.isNull()) item->setData(icon, Qt::DecorationRole);
+if (userData.isValid()) item->setData(userData, Qt::UserRole);
+m->insertRow(index, item);
+++itemCount;
+} else {
+d->inserting = true;
+if (d->model->insertRows(index, 1, d->root)) {
+QModelIndex item = d->model->index(index, d->modelColumn, d->root);
+if (icon.isNull() && !userData.isValid()) {
+d->model->setData(item, text, Qt::EditRole);
+} else {
+QMap<int, QVariant> values;
+if (!text.isNull()) values.insert(Qt::EditRole, text);
+if (!icon.isNull()) values.insert(Qt::DecorationRole, icon);
+if (userData.isValid()) values.insert(Qt::UserRole, userData);
+if (!values.isEmpty()) d->model->setItemData(item, values);
+}
+d->inserting = false;
+d->_q_rowsInserted(d->root, index, index);
+++itemCount;
+} else {
+d->inserting = false;
+}
+}
+if (itemCount > d->maxCount)
+d->model->removeRows(itemCount - 1, itemCount - d->maxCount, d->root);
+}
+/*!
+Inserts the strings from the \a list into the combobox as separate items,
+starting at the \a index specified.
+If the index is equal to or higher than the total number of items, the new items
+are appended to the list of existing items. If the index is zero or negative, the
+new items are prepended to the list of existing items.
+\sa insertItem()
+*/
+void QComboBox::insertItems(int index, const QStringList &list)
+{
+Q_D(QComboBox);
+if (list.isEmpty())
+return;
+index = qBound(0, index, count());
+int insertCount = qMin(d->maxCount - index, list.count());
+if (insertCount <= 0)
+return;
+// For the common case where we are using the built in QStandardItemModel
+// construct a QStandardItem, reducing the number of expensive signals from the model
+if (QStandardItemModel *m = qobject_cast<QStandardItemModel*>(d->model)) {
+QList<QStandardItem *> items;
+QStandardItem *hiddenRoot = m->invisibleRootItem();
+for (int i = 0; i < insertCount; ++i)
+items.append(new QStandardItem(list.at(i)));
+hiddenRoot->insertRows(index, items);
+} else {
+d->inserting = true;
+if (d->model->insertRows(index, insertCount, d->root)) {
+QModelIndex item;
+for (int i = 0; i < insertCount; ++i) {
+item = d->model->index(i+index, d->modelColumn, d->root);
+d->model->setData(item, list.at(i), Qt::EditRole);
+}
+d->inserting = false;
+d->_q_rowsInserted(d->root, index, index + insertCount - 1);
+} else {
+d->inserting = false;
+}
+}
+int mc = count();
+if (mc > d->maxCount)
+d->model->removeRows(d->maxCount, mc - d->maxCount, d->root);
+}
+/*!
+\since 4.4
+Inserts a separator item into the combobox at the given \a index.
+If the index is equal to or higher than the total number of items, the new item
+is appended to the list of existing items. If the index is zero or negative, the
+new item is prepended to the list of existing items.
+\sa insertItem()
+*/
+void QComboBox::insertSeparator(int index)
+{
+Q_D(QComboBox);
+int itemCount = count();
+index = qBound(0, index, itemCount);
+if (index >= d->maxCount)
+return;
+insertItem(index, QIcon(), QString());
+QComboBoxDelegate::setSeparator(d->model, d->model->index(index, 0, d->root));
+}
+/*!
+Removes the item at the given \a index from the combobox.
+This will update the current index if the index is removed.
+This function does nothing if \a index is out of range.
+*/
+void QComboBox::removeItem(int index)
+{
+Q_D(QComboBox);
+if (index < 0 || index >= count())
+return;
+d->model->removeRows(index, 1, d->root);
+}
+/*!
+Sets the \a text for the item on the given \a index in the combobox.
+*/
+void QComboBox::setItemText(int index, const QString &text)
+{
+Q_D(const QComboBox);
+QModelIndex item = d->model->index(index, d->modelColumn, d->root);
+if (item.isValid()) {
+d->model->setData(item, text, Qt::EditRole);
+}
+}
+/*!
+Sets the \a icon for the item on the given \a index in the combobox.
+*/
+void QComboBox::setItemIcon(int index, const QIcon &icon)
+{
+Q_D(const QComboBox);
+QModelIndex item = d->model->index(index, d->modelColumn, d->root);
+if (item.isValid()) {
+d->model->setData(item, icon, Qt::DecorationRole);
+}
+}
+/*!
+Sets the data \a role for the item on the given \a index in the combobox
+to the specified \a value.
+*/
+void QComboBox::setItemData(int index, const QVariant &value, int role)
+{
+Q_D(const QComboBox);
+QModelIndex item = d->model->index(index, d->modelColumn, d->root);
+if (item.isValid()) {
+d->model->setData(item, value, role);
+}
+}
+/*!
+Returns the list view used for the combobox popup.
+*/
+QAbstractItemView *QComboBox::view() const
+{
+Q_D(const QComboBox);
+return const_cast<QComboBoxPrivate*>(d)->viewContainer()->itemView();
+}
+/*!
+Sets the view to be used in the combobox popup to the given \a
+itemView. The combobox takes ownership of the view.
+Note: If you want to use the convenience views (like QListWidget,
+QTableWidget or QTreeWidget), make sure to call setModel() on the
+combobox with the convenience widgets model before calling this
+function.
+*/
+void QComboBox::setView(QAbstractItemView *itemView)
+{
+Q_D(QComboBox);
+if (!itemView) {
+qWarning("QComboBox::setView: cannot set a 0 view");
+return;
+}
+if (itemView->model() != d->model)
+itemView->setModel(d->model);
+d->viewContainer()->setItemView(itemView);
+}
+/*!
+\reimp
+*/
+QSize QComboBox::minimumSizeHint() const
+{
+Q_D(const QComboBox);
+return d->recomputeSizeHint(d->minimumSizeHint);
+}
+/*!
+\reimp
+This implementation caches the size hint to avoid resizing when
+the contents change dynamically. To invalidate the cached value
+change the \l sizeAdjustPolicy.
+*/
+QSize QComboBox::sizeHint() const
+{
+Q_D(const QComboBox);
+return d->recomputeSizeHint(d->sizeHint);
+}
+/*!
+Displays the list of items in the combobox. If the list is empty
+then the no items will be shown.
+If you reimplement this function to show a custom pop-up, make
+sure you call hidePopup() to reset the internal state.
+\sa hidePopup()
+*/
+void QComboBox::showPopup()
+{
+Q_D(QComboBox);
+if (count() <= 0)
+return;
+#ifdef QT_KEYPAD_NAVIGATION
+#ifndef QT_NO_COMPLETER
+if (QApplication::keypadNavigationEnabled() && d->completer) {
+// editable combo box is line edit plus completer
+setEditFocus(true);
+d->completer->complete(); // show popup
+return;
+}
+#endif
+#endif
+QStyle * const style = this->style();
+// set current item and select it
+view()->selectionModel()->setCurrentIndex(d->currentIndex,
+QItemSelectionModel::ClearAndSelect);
+QComboBoxPrivateContainer* container = d->viewContainer();
+QStyleOptionComboBox opt;
+initStyleOption(&opt);
+QRect listRect(style->subControlRect(QStyle::CC_ComboBox, &opt,
+QStyle::SC_ComboBoxListBoxPopup, this));
+QRect screen = d->popupGeometry(QApplication::desktop()->screenNumber(this));
+QPoint below = mapToGlobal(listRect.bottomLeft());
+int belowHeight = screen.bottom() - below.y();
+QPoint above = mapToGlobal(listRect.topLeft());
+int aboveHeight = above.y() - screen.y();
+bool boundToScreen = !window()->testAttribute(Qt::WA_DontShowOnScreen);
+const bool usePopup = style->styleHint(QStyle::SH_ComboBox_Popup, &opt, this);
+{
+int listHeight = 0;
+int count = 0;
+QStack<QModelIndex> toCheck;
+toCheck.push(view()->rootIndex());
+#ifndef QT_NO_TREEVIEW
+QTreeView *treeView = qobject_cast<QTreeView*>(view());
+if (treeView && treeView->header() && !treeView->header()->isHidden())
+listHeight += treeView->header()->height();
+#endif
+while (!toCheck.isEmpty()) {
+QModelIndex parent = toCheck.pop();
+for (int i = 0; i < d->model->rowCount(parent); ++i) {
+QModelIndex idx = d->model->index(i, d->modelColumn, parent);
+if (!idx.isValid())
+continue;
+listHeight += view()->visualRect(idx).height() + container->spacing();
+#ifndef QT_NO_TREEVIEW
+if (d->model->hasChildren(idx) && treeView && treeView->isExpanded(idx))
+toCheck.push(idx);
+#endif
+++count;
+if (!usePopup && count > d->maxVisibleItems) {
+toCheck.clear();
+break;
+}
+}
+}
+listRect.setHeight(listHeight);
+}
+{
+// add the spacing for the grid on the top and the bottom;
+int heightMargin = 2*container->spacing();
+// add the frame of the container
+int marginTop, marginBottom;
+container->getContentsMargins(0, &marginTop, 0, &marginBottom);
+heightMargin += marginTop + marginBottom;
+//add the frame of the view
+view()->getContentsMargins(0, &marginTop, 0, &marginBottom);
+marginTop += static_cast<QAbstractScrollAreaPrivate *>(QObjectPrivate::get(view()))->top;
+marginBottom += static_cast<QAbstractScrollAreaPrivate *>(QObjectPrivate::get(view()))->bottom;
+heightMargin += marginTop + marginBottom;
+listRect.setHeight(listRect.height() + heightMargin);
+}
+// Add space for margin at top and bottom if the style wants it.
+if (usePopup)
+listRect.setHeight(listRect.height() + style->pixelMetric(QStyle::PM_MenuVMargin, &opt, this) * 2);
+// Make sure the popup is wide enough to display its contents.
+if (usePopup) {
+const int diff = d->computeWidthHint() - width();
+if (diff > 0)
+listRect.setWidth(listRect.width() + diff);
+}
+//we need to activate the layout to make sure the min/maximum size are set when the widget was not yet show
+container->layout()->activate();
+//takes account of the minimum/maximum size of the container
+listRect.setSize( listRect.size().expandedTo(container->minimumSize())
+.boundedTo(container->maximumSize()));
+// make sure the widget fits on screen
+if (boundToScreen) {
+if (listRect.width() > screen.width() )
+listRect.setWidth(screen.width());
+if (mapToGlobal(listRect.bottomRight()).x() > screen.right()) {
+below.setX(screen.x() + screen.width() - listRect.width());
+above.setX(screen.x() + screen.width() - listRect.width());
+}
+if (mapToGlobal(listRect.topLeft()).x() < screen.x() ) {
+below.setX(screen.x());
+above.setX(screen.x());
+}
+}
+if (usePopup) {
+// Position horizontally.
+listRect.moveLeft(above.x());
+#ifndef Q_WS_S60
+// Position vertically so the curently selected item lines up
+// with the combo box.
+const QRect currentItemRect = view()->visualRect(view()->currentIndex());
+const int offset = listRect.top() - currentItemRect.top();
+listRect.moveTop(above.y() + offset - listRect.top());
+#endif
+// Clamp the listRect height and vertical position so we don't expand outside the
+// available screen geometry.This may override the vertical position, but it is more
+// important to show as much as possible of the popup.
+const int height = !boundToScreen ? listRect.height() : qMin(listRect.height(), screen.height());
+#ifdef Q_WS_S60
+//popup needs to be stretched with screen minimum dimension
+listRect.setHeight(qMin(screen.height(), screen.width()));
+#else
+listRect.setHeight(height);
+#endif
+if (boundToScreen) {
+if (listRect.top() < screen.top())
+listRect.moveTop(screen.top());
+if (listRect.bottom() > screen.bottom())
+listRect.moveBottom(screen.bottom());
+}
+#ifdef Q_WS_S60
+if (screen.width() < screen.height()) {
+// in portait, menu should be positioned above softkeys
+listRect.moveBottom(screen.bottom());
+} else {
+// landscape, menu should be at the right and horizontally centered
+listRect.setWidth(listRect.height());
+listRect.moveCenter(screen.center());
+(opt.direction == Qt::LeftToRight) ? listRect.setRight(screen.right()) :
+listRect.setLeft(screen.left());
+}
+#endif
+} else if (!boundToScreen || listRect.height() <= belowHeight) {
+listRect.moveTopLeft(below);
+} else if (listRect.height() <= aboveHeight) {
+listRect.moveBottomLeft(above);
+} else if (belowHeight >= aboveHeight) {
+listRect.setHeight(belowHeight);
+listRect.moveTopLeft(below);
+} else {
+listRect.setHeight(aboveHeight);
+listRect.moveBottomLeft(above);
+}
+#ifndef QT_NO_IM
+if (QInputContext *qic = inputContext())
+qic->reset();
+#endif
+QScrollBar *sb = view()->horizontalScrollBar();
+Qt::ScrollBarPolicy policy = view()->horizontalScrollBarPolicy();
+bool needHorizontalScrollBar = (policy == Qt::ScrollBarAsNeeded || policy == Qt::ScrollBarAlwaysOn)
+&& sb->minimum() < sb->maximum();
+if (needHorizontalScrollBar) {
+listRect.adjust(0, 0, 0, sb->height());
+}
+container->setGeometry(listRect);
+#ifndef Q_WS_MAC
+const bool updatesEnabled = container->updatesEnabled();
+#endif
+#if defined(Q_WS_WIN) && !defined(QT_NO_EFFECTS)
+bool scrollDown = (listRect.topLeft() == below);
+if (QApplication::isEffectEnabled(Qt::UI_AnimateCombo)
+&& !style->styleHint(QStyle::SH_ComboBox_Popup, &opt, this) && !window()->testAttribute(Qt::WA_DontShowOnScreen))
+qScrollEffect(container, scrollDown ? QEffects::DownScroll : QEffects::UpScroll, 150);
+#endif
+// Don't disable updates on Mac OS X. Windows are displayed immediately on this platform,
+// which means that the window will be visible before the call to container->show() returns.
+// If updates are disabled at this point we'll miss our chance at painting the popup
+// menu before it's shown, causing flicker since the window then displays the standard gray
+// background.
+#ifndef Q_WS_MAC
+container->setUpdatesEnabled(false);
+#endif
+container->raise();
+container->show();
+container->updateScrollers();
+view()->setFocus();
+view()->scrollTo(view()->currentIndex(),
+style->styleHint(QStyle::SH_ComboBox_Popup, &opt, this)
+? QAbstractItemView::PositionAtCenter
+: QAbstractItemView::EnsureVisible);
+#ifndef Q_WS_MAC
+container->setUpdatesEnabled(updatesEnabled);
+#endif
+container->update();
+#ifdef QT_KEYPAD_NAVIGATION
+if (QApplication::keypadNavigationEnabled())
+view()->setEditFocus(true);
+#endif
+}
+/*!
+Hides the list of items in the combobox if it is currently visible
+and resets the internal state, so that if the custom pop-up was
+shown inside the reimplemented showPopup(), then you also need to
+reimplement the hidePopup() function to hide your custom pop-up
+and call the base class implementation to reset the internal state
+whenever your custom pop-up widget is hidden.
+\sa showPopup()
+*/
+void QComboBox::hidePopup()
+{
+Q_D(QComboBox);
+if (d->container && d->container->isVisible()) {
+#if !defined(QT_NO_EFFECTS)
+d->model->blockSignals(true);
+d->container->itemView()->blockSignals(true);
+d->container->blockSignals(true);
+// Flash selected/triggered item (if any).
+if (style()->styleHint(QStyle::SH_Menu_FlashTriggeredItem)) {
+QItemSelectionModel *selectionModel = view() ? view()->selectionModel() : 0;
+if (selectionModel && selectionModel->hasSelection()) {
+QEventLoop eventLoop;
+const QItemSelection selection = selectionModel->selection();
+// Deselect item and wait 60 ms.
+selectionModel->select(selection, QItemSelectionModel::Toggle);
+QTimer::singleShot(60, &eventLoop, SLOT(quit()));
+eventLoop.exec();
+// Select item and wait 20 ms.
+selectionModel->select(selection, QItemSelectionModel::Toggle);
+QTimer::singleShot(20, &eventLoop, SLOT(quit()));
+eventLoop.exec();
+}
+}
+// Fade out.
+bool needFade = style()->styleHint(QStyle::SH_Menu_FadeOutOnHide);
+if (needFade) {
+#if defined(Q_WS_MAC)
+macWindowFade(qt_mac_window_for(d->container));
+#endif // Q_WS_MAC
+// Other platform implementations welcome :-)
+}
+d->model->blockSignals(false);
+d->container->itemView()->blockSignals(false);
+d->container->blockSignals(false);
+if (!needFade)
+#endif // QT_NO_EFFECTS
+// Fade should implicitly hide as well ;-)
+d->container->hide();
+}
+#ifdef QT_KEYPAD_NAVIGATION
+if (QApplication::keypadNavigationEnabled() && isEditable() && hasFocus())
+setEditFocus(true);
+#endif
+d->_q_resetButton();
+}
+/*!
+Clears the combobox, removing all items.
+Note: If you have set an external model on the combobox this model
+will still be cleared when calling this function.
+*/
+void QComboBox::clear()
+{
+Q_D(QComboBox);
+d->model->removeRows(0, d->model->rowCount(d->root), d->root);
+}
+/*!
+\fn void QComboBox::clearValidator()
+Use setValidator(0) instead.
+*/
+/*!
+Clears the contents of the line edit used for editing in the combobox.
+*/
+void QComboBox::clearEditText()
+{
+Q_D(QComboBox);
+if (d->lineEdit)
+d->lineEdit->clear();
+}
+/*!
+Sets the \a text in the combobox's text edit.
+*/
+void QComboBox::setEditText(const QString &text)
+{
+Q_D(QComboBox);
+if (d->lineEdit)
+d->lineEdit->setText(text);
+}
+/*!
+\reimp
+*/
+void QComboBox::focusInEvent(QFocusEvent *e)
+{
+Q_D(QComboBox);
+update();
+if (d->lineEdit) {
+d->lineEdit->event(e);
+#ifndef QT_NO_COMPLETER
+if (d->lineEdit->completer())
+d->lineEdit->completer()->setWidget(this);
+#endif
+}
+}
+/*!
+\reimp
+*/
+void QComboBox::focusOutEvent(QFocusEvent *e)
+{
+Q_D(QComboBox);
+update();
+if (d->lineEdit)
+d->lineEdit->event(e);
+}
+/*! \reimp */
+void QComboBox::changeEvent(QEvent *e)
+{
+Q_D(QComboBox);
+switch (e->type()) {
+case QEvent::StyleChange:
+d->updateDelegate();
+#ifdef Q_WS_MAC
+case QEvent::MacSizeChange:
+#endif
+d->sizeHint = QSize(); // invalidate size hint
+d->minimumSizeHint = QSize();
+d->updateLayoutDirection();
+if (d->lineEdit)
+d->updateLineEditGeometry();
+d->setLayoutItemMargins(QStyle::SE_ComboBoxLayoutItem);
+#ifdef Q_WS_S60
+if (d->container) {
+QStyleOptionComboBox opt;
+initStyleOption(&opt);
+if (style()->styleHint(QStyle::SH_ComboBox_Popup, &opt, this)) {
+const QRect screen = d->popupGeometry(QApplication::desktop()->screenNumber(this));
+QRect listRect(style()->subControlRect(QStyle::CC_ComboBox, &opt,
+QStyle::SC_ComboBoxListBoxPopup, this));
+listRect.setHeight(qMin(screen.height(), screen.width()));
+if (screen.width() < screen.height()) {
+// in portait, menu should be positioned above softkeys
+listRect.moveBottom(screen.bottom());
+} else {
+// landscape, menu should be at the right and horizontally centered
+listRect.setWidth(listRect.height());
+listRect.moveCenter(screen.center());
+(opt.direction == Qt::LeftToRight) ? listRect.setRight(screen.right()) :
+listRect.setLeft(screen.left());
+}
+d->container->setGeometry(listRect);
+}
+}
+#endif
+// ### need to update scrollers etc. as well here
+break;
+case QEvent::EnabledChange:
+if (!isEnabled())
+hidePopup();
+break;
+case QEvent::PaletteChange: {
+d->updateViewContainerPaletteAndOpacity();
+break;
+}
+case QEvent::FontChange:
+d->sizeHint = QSize(); // invalidate size hint
+d->viewContainer()->setFont(font());
+if (d->lineEdit)
+d->updateLineEditGeometry();
+break;
+default:
+break;
+}
+QWidget::changeEvent(e);
+}
+/*!
+\reimp
+*/
+void QComboBox::resizeEvent(QResizeEvent *)
+{
+Q_D(QComboBox);
+d->updateLineEditGeometry();
+}
+/*!
+\reimp
+*/
+void QComboBox::paintEvent(QPaintEvent *)
+{
+QStylePainter painter(this);
+painter.setPen(palette().color(QPalette::Text));
+// draw the combobox frame, focusrect and selected etc.
+QStyleOptionComboBox opt;
+initStyleOption(&opt);
+painter.drawComplexControl(QStyle::CC_ComboBox, opt);
+// draw the icon and text
+painter.drawControl(QStyle::CE_ComboBoxLabel, opt);
+}
+/*!
+\reimp
+*/
+void QComboBox::showEvent(QShowEvent *e)
+{
+Q_D(QComboBox);
+if (!d->shownOnce && d->sizeAdjustPolicy == QComboBox::AdjustToContentsOnFirstShow) {
+d->sizeHint = QSize();
+updateGeometry();
+}
+d->shownOnce = true;
+QWidget::showEvent(e);
+}
+/*!
+\reimp
+*/
+void QComboBox::hideEvent(QHideEvent *)
+{
+hidePopup();
+}
+/*!
+\reimp
+*/
+bool QComboBox::event(QEvent *event)
+{
+Q_D(QComboBox);
+switch(event->type()) {
+case QEvent::LayoutDirectionChange:
+case QEvent::ApplicationLayoutDirectionChange:
+d->updateLayoutDirection();
+d->updateLineEditGeometry();
+break;
+case QEvent::HoverEnter:
+case QEvent::HoverLeave:
+case QEvent::HoverMove:
+if (const QHoverEvent *he = static_cast<const QHoverEvent *>(event))
+d->updateHoverControl(he->pos());
+break;
+case QEvent::ShortcutOverride:
+if (d->lineEdit)
+return d->lineEdit->event(event);
+break;
+#ifdef QT_KEYPAD_NAVIGATION
+case QEvent::EnterEditFocus:
+if (!d->lineEdit)
+setEditFocus(false); // We never want edit focus if we are not editable
+else
+d->lineEdit->event(event);  //so cursor starts
+break;
+case QEvent::LeaveEditFocus:
+if (d->lineEdit)
+d->lineEdit->event(event);  //so cursor stops
+break;
+#endif
+default:
+break;
+}
+return QWidget::event(event);
+}
+/*!
+\reimp
+*/
+void QComboBox::mousePressEvent(QMouseEvent *e)
+{
+Q_D(QComboBox);
+QStyleOptionComboBox opt;
+initStyleOption(&opt);
+QStyle::SubControl sc = style()->hitTestComplexControl(QStyle::CC_ComboBox, &opt, e->pos(),
+this);
+if (e->button() == Qt::LeftButton && (sc == QStyle::SC_ComboBoxArrow || !isEditable())
+&& !d->viewContainer()->isVisible()) {
+if (sc == QStyle::SC_ComboBoxArrow)
+d->updateArrow(QStyle::State_Sunken);
+#ifdef QT_KEYPAD_NAVIGATION
+if (!d->lineEdit) {
+#endif
+// We've restricted the next couple of lines, because by not calling
+// viewContainer(), we avoid creating the QComboBoxPrivateContainer.
+d->viewContainer()->blockMouseReleaseTimer.start(QApplication::doubleClickInterval());
+d->viewContainer()->initialClickPosition = mapToGlobal(e->pos());
+#ifdef QT_KEYPAD_NAVIGATION
+}
+#endif
+showPopup();
+} else {
+#ifdef QT_KEYPAD_NAVIGATION
+if (QApplication::keypadNavigationEnabled() && sc == QStyle::SC_ComboBoxEditField && d->lineEdit) {
+d->lineEdit->event(e);  //so lineedit can move cursor, etc
+return;
+}
+#endif
+QWidget::mousePressEvent(e);
+}
+}
+/*!
+\reimp
+*/
+void QComboBox::mouseReleaseEvent(QMouseEvent *e)
+{
+Q_D(QComboBox);
+Q_UNUSED(e);
+d->updateArrow(QStyle::State_None);
+}
+/*!
+\reimp
+*/
+void QComboBox::keyPressEvent(QKeyEvent *e)
+{
+Q_D(QComboBox);
+#ifndef QT_NO_COMPLETER
+if (d->lineEdit
+&& d->lineEdit->completer()
+&& d->lineEdit->completer()->popup()
+&& d->lineEdit->completer()->popup()->isVisible()) {
+// provide same autocompletion support as line edit
+d->lineEdit->event(e);
+return;
+}
+#endif
+enum Move { NoMove=0 , MoveUp , MoveDown , MoveFirst , MoveLast};
+Move move = NoMove;
+int newIndex = currentIndex();
+switch (e->key()) {
+case Qt::Key_Up:
+if (e->modifiers() & Qt::ControlModifier)
+break; // pass to line edit for auto completion
+case Qt::Key_PageUp:
+#ifdef QT_KEYPAD_NAVIGATION
+if (QApplication::keypadNavigationEnabled())
+e->ignore();
+else
+#endif
+move = MoveUp;
+break;
+case Qt::Key_Down:
+if (e->modifiers() & Qt::AltModifier) {
+showPopup();
+return;
+} else if (e->modifiers() & Qt::ControlModifier)
+break; // pass to line edit for auto completion
+// fall through
+case Qt::Key_PageDown:
+#ifdef QT_KEYPAD_NAVIGATION
+if (QApplication::keypadNavigationEnabled())
+e->ignore();
+else
+#endif
+move = MoveDown;
+break;
+case Qt::Key_Home:
+if (!d->lineEdit)
+move = MoveFirst;
+break;
+case Qt::Key_End:
+if (!d->lineEdit)
+move = MoveLast;
+break;
+case Qt::Key_F4:
+if (!e->modifiers()) {
+showPopup();
+return;
+}
+break;
+case Qt::Key_Space:
+if (!d->lineEdit) {
+showPopup();
+return;
+}
+case Qt::Key_Enter:
+case Qt::Key_Return:
+case Qt::Key_Escape:
+if (!d->lineEdit)
+e->ignore();
+break;
+#ifdef QT_KEYPAD_NAVIGATION
+case Qt::Key_Select:
+if (QApplication::keypadNavigationEnabled()
+&& (!hasEditFocus() || !d->lineEdit)) {
+showPopup();
+return;
+}
+break;
+case Qt::Key_Left:
+case Qt::Key_Right:
+if (QApplication::keypadNavigationEnabled() && !hasEditFocus())
+e->ignore();
+break;
+case Qt::Key_Back:
+if (QApplication::keypadNavigationEnabled()) {
+if (!hasEditFocus() || !d->lineEdit)
+e->ignore();
+} else {
+e->ignore(); // let the surounding dialog have it
+}
+break;
+#endif
+default:
+if (!d->lineEdit) {
+if (!e->text().isEmpty())
+d->keyboardSearchString(e->text());
+else
+e->ignore();
+}
+}
+if (move != NoMove) {
+e->accept();
+switch (move) {
+case MoveFirst:
+newIndex = -1;
+case MoveDown:
+newIndex++;
+while ((newIndex < count()) && !(d->model->flags(d->model->index(newIndex,d->modelColumn,d->root)) & Qt::ItemIsEnabled))
+newIndex++;
+break;
+case MoveLast:
+newIndex = count();
+case MoveUp:
+newIndex--;
+while ((newIndex >= 0) && !(d->model->flags(d->model->index(newIndex,d->modelColumn,d->root)) & Qt::ItemIsEnabled))
+newIndex--;
+break;
+default:
+e->ignore();
+break;
+}
+if (newIndex >= 0 && newIndex < count() && newIndex != currentIndex()) {
+setCurrentIndex(newIndex);
+d->emitActivated(d->currentIndex);
+}
+} else if (d->lineEdit) {
+d->lineEdit->event(e);
+}
+}
+/*!
+\reimp
+*/
+void QComboBox::keyReleaseEvent(QKeyEvent *e)
+{
+Q_D(QComboBox);
+if (d->lineEdit)
+d->lineEdit->event(e);
+}
+/*!
+\reimp
+*/
+#ifndef QT_NO_WHEELEVENT
+void QComboBox::wheelEvent(QWheelEvent *e)
+{
+Q_D(QComboBox);
+if (!d->viewContainer()->isVisible()) {
+int newIndex = currentIndex();
+if (e->delta() > 0) {
+newIndex--;
+while ((newIndex >= 0) && !(d->model->flags(d->model->index(newIndex,d->modelColumn,d->root)) & Qt::ItemIsEnabled))
+newIndex--;
+} else {
+newIndex++;
+while ((newIndex < count()) && !(d->model->flags(d->model->index(newIndex,d->modelColumn,d->root)) & Qt::ItemIsEnabled))
+newIndex++;
+}
+if (newIndex >= 0 && newIndex < count() && newIndex != currentIndex()) {
+setCurrentIndex(newIndex);
+d->emitActivated(d->currentIndex);
+}
+e->accept();
+}
+}
+#endif
+#ifndef QT_NO_CONTEXTMENU
+/*!
+\reimp
+*/
+void QComboBox::contextMenuEvent(QContextMenuEvent *e)
+{
+Q_D(QComboBox);
+if (d->lineEdit) {
+Qt::ContextMenuPolicy p = d->lineEdit->contextMenuPolicy();
+d->lineEdit->setContextMenuPolicy(Qt::DefaultContextMenu);
+d->lineEdit->event(e);
+d->lineEdit->setContextMenuPolicy(p);
+}
+}
+#endif // QT_NO_CONTEXTMENU
+void QComboBoxPrivate::keyboardSearchString(const QString &text)
+{
+// use keyboardSearch from the listView so we do not duplicate code
+QAbstractItemView *view = viewContainer()->itemView();
+view->setCurrentIndex(currentIndex);
+int currentRow = view->currentIndex().row();
+view->keyboardSearch(text);
+if (currentRow != view->currentIndex().row()) {
+setCurrentIndex(view->currentIndex());
+emitActivated(currentIndex);
+}
+}
+void QComboBoxPrivate::modelChanged()
+{
+Q_Q(QComboBox);
+if (sizeAdjustPolicy == QComboBox::AdjustToContents) {
+sizeHint = QSize();
+adjustComboBoxSize();
+q->updateGeometry();
+}
+}
+/*!
+\reimp
+*/
+void QComboBox::inputMethodEvent(QInputMethodEvent *e)
+{
+Q_D(QComboBox);
+if (d->lineEdit) {
+d->lineEdit->event(e);
+} else {
+if (!e->commitString().isEmpty())
+d->keyboardSearchString(e->commitString());
+else
+e->ignore();
+}
+}
+/*!
+\reimp
+*/
+QVariant QComboBox::inputMethodQuery(Qt::InputMethodQuery query) const
+{
+Q_D(const QComboBox);
+if (d->lineEdit)
+return d->lineEdit->inputMethodQuery(query);
+return QWidget::inputMethodQuery(query);
+}
+/*!
+\fn bool QComboBox::editable() const
+Use isEditable() instead.
+*/
+/*!
+\fn void QComboBox::insertItem(const QPixmap &pixmap, int index)
+Use an insertItem() function that takes a QIcon instead, for
+example, insertItem(index, QIcon(pixmap)).
+*/
+/*!
+\fn void QComboBox::insertItem(const QPixmap &pixmap, const QString &text, int index)
+Use an insertItem() function that takes a QIcon instead, for
+example, insertItem(index, QIcon(pixmap), text).
+\sa insertItems()
+*/
+/*!
+\fn void QComboBox::changeItem(const QString &text, int index)
+Use setItemText() instead.
+*/
+/*!
+\fn void QComboBox::changeItem(const QPixmap &pixmap, int index)
+Use setItemIcon() instead, for example,
+setItemIcon(index, QIcon(pixmap)).
+*/
+/*!
+\fn void QComboBox::changeItem(const QPixmap &pixmap, const QString &text, int index)
+Use setItem() instead, for example, setItem(index, QIcon(pixmap),text).
+*/
+/*!
+\fn void QComboBox::addItem(const QString &text, const QVariant &userData)
+Adds an item to the combobox with the given \a text, and
+containing the specified \a userData (stored in the Qt::UserRole).
+The item is appended to the list of existing items.
+*/
+/*!
+\fn void QComboBox::addItem(const QIcon &icon, const QString &text,
+const QVariant &userData)
+Adds an item to the combobox with the given \a icon and \a text,
+and containing the specified \a userData (stored in the
+Qt::UserRole). The item is appended to the list of existing items.
+*/
+/*!
+\fn void QComboBox::addItems(const QStringList &texts)
+Adds each of the strings in the given \a texts to the combobox. Each item
+is appended to the list of existing items in turn.
+*/
+/*!
+\fn void QComboBox::editTextChanged(const QString &text)
+This signal is emitted when the text in the combobox's line edit
+widget is changed. The new text is specified by \a text.
+*/
+/*!
+\fn QComboBox::InsertPolicy QComboBox::insertionPolicy() const
+\compat
+Use QComboBox::insertPolicy instead.
+*/
+/*!
+\fn void QComboBox::setInsertionPolicy(InsertPolicy policy)
+\compat
+Use QComboBox::insertPolicy instead.
+*/
+/*!
+\fn void QComboBox::setCurrentText(const QString &text)
+\compat
+Use setItemText() instead.
+\sa currentIndex()
+*/
+/*!
+\fn QString QComboBox::text(int index) const
+\compat
+Use itemText() instead.
+*/
+/*!
+\fn QPixmap QComboBox::pixmap(int index) const
+\compat
+Use itemIcon() instead.
+*/
+/*!
+\fn void QComboBox::insertStringList(const QStringList &list, int index)
+\compat
+Use insertItems() instead.
+*/
+/*!
+\fn void QComboBox::insertItem(const QString &text, int index)
+\compat
+*/
+/*!
+\fn void QComboBox::clearEdit()
+\compat
+Use clearEditText() instead.
+*/
+/*!
+\property QComboBox::frame
+\brief whether the combo box draws itself with a frame
+If enabled (the default) the combo box draws itself inside a
+frame, otherwise the combo box draws itself without any frame.
+*/
+bool QComboBox::hasFrame() const
+{
+Q_D(const QComboBox);
+return d->frame;
+}
+void QComboBox::setFrame(bool enable)
+{
+Q_D(QComboBox);
+d->frame = enable;
+update();
+updateGeometry();
+}
+/*!
+\property QComboBox::modelColumn
+\brief the column in the model that is visible.
+If set prior to populating the combo box, the pop-up view will
+not be affected and will show the first column (using this property's
+default value).
+By default, this property has a value of 0.
+*/
+int QComboBox::modelColumn() const
+{
+Q_D(const QComboBox);
+return d->modelColumn;
+}
+void QComboBox::setModelColumn(int visibleColumn)
+{
+Q_D(QComboBox);
+d->modelColumn = visibleColumn;
+QListView *lv = qobject_cast<QListView *>(d->viewContainer()->itemView());
+if (lv)
+lv->setModelColumn(visibleColumn);
+#ifndef QT_NO_COMPLETER
+if (d->lineEdit && d->lineEdit->completer()
+&& d->lineEdit->completer() == d->completer)
+d->lineEdit->completer()->setCompletionColumn(visibleColumn);
+#endif
+setCurrentIndex(currentIndex()); //update the text to the text of the new column;
+}
+/*!
+\fn int QComboBox::currentItem() const
+Use currentIndex() instead.
+*/
+/*!
+\fn void QComboBox::setCurrentItem(int)
+Use setCurrentIndex(int) instead.
+*/
+/*!
+\fn void QComboBox::popup()
+Use showPopup() instead.
+*/
+/*!
+\fn void QComboBox::textChanged(const QString &text)
+Use the editTextChanged(const QString &text) signal instead.
+*/
+/*!
+\typedef QComboBox::Policy
+\compat
+Use QComboBox::InsertPolicy instead.
+*/
+QT_END_NAMESPACE
+#include "moc_qcombobox.cpp"
+#endif // QT_NO_COMBOBOX