--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/designer/src/lib/shared/spacer_widget.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,280 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Designer 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 "spacer_widget_p.h"
+#include "layoutinfo_p.h"
+
+#include <QtDesigner/abstractformwindow.h>
+#include <QtDesigner/QDesignerFormWindowInterface>
+#include <QtDesigner/QDesignerFormEditorInterface>
+#include <QtDesigner/QDesignerPropertySheetExtension>
+#include <QtDesigner/QExtensionManager>
+
+#include <QtGui/QLayout>
+#include <QtGui/QPainter>
+#include <QtGui/qevent.h>
+#include <QtCore/qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+// The Spacer widget is Designer representation of QLayoutItem.
+// It uses QLayoutItem's sizeHint property as QWidget
+// sizeHint and the QLayoutItem's sizeType property as QWidget size policy.
+// If it is not within a layout, it adds a margin (m_SizeOffset) around it
+// to avoid being shrunk to an invisible state when the sizeHint is reset to 0,0
+// and enables sizeHandle-resizing. In a layout, however, this m_SizeOffset
+// should not be applied for pixel-exact design.
+
+Spacer::Spacer(QWidget *parent) :
+ QWidget(parent),
+ m_SizeOffset(3, 3), // A small offset to ensure the spacer is still visible when reset to size 0,0
+ m_orientation(Qt::Vertical),
+ m_interactive(true),
+ m_layoutState(UnknownLayoutState),
+ m_sizeHint(0, 0)
+{
+ setAttribute(Qt::WA_MouseNoMask);
+ m_formWindow = QDesignerFormWindowInterface::findFormWindow(this);
+ setSizeType(QSizePolicy::Expanding);
+}
+
+bool Spacer::event(QEvent *e)
+{
+ switch (e->type()) {
+ case QEvent::ToolTip:
+ updateToolTip(); // Tooltip includes size, so, refresh on demand
+ break;
+ case QEvent::ParentChange: // Cache information about 'being in layout' which is expensive to calculate.
+ m_layoutState = UnknownLayoutState;
+ break;
+ default:
+ break;
+ }
+ return QWidget::event(e);
+}
+
+bool Spacer::isInLayout() const
+{
+ if (m_layoutState == UnknownLayoutState) {
+ m_layoutState = OutsideLayout;
+ if (m_formWindow)
+ if (const QWidget *parent = parentWidget())
+ if (qdesigner_internal::LayoutInfo::managedLayoutType(m_formWindow->core(), parent) != qdesigner_internal::LayoutInfo::NoLayout)
+ m_layoutState = InLayout;
+ }
+ return m_layoutState == InLayout;
+}
+
+void Spacer::paintEvent(QPaintEvent *)
+{
+ // Only draw spacers when we're editting widgets
+ if (m_formWindow != 0 && m_formWindow->currentTool() != 0)
+ return;
+
+ QPainter p(this);
+ p.setPen(Qt::blue);
+ const int w = width();
+ const int h = height();
+ if (w * h == 0)
+ return;
+
+ if (w <= m_SizeOffset.width() || h <= m_SizeOffset.height()) {
+ const int lw = w - 1;
+ const int lh = h - 1;
+ switch (m_orientation) {
+ case Qt::Horizontal:
+ p.drawLine(0, 0, 0, lh);
+ p.drawLine(lw, 0, lw, lh);
+ break;
+ case Qt::Vertical:
+ p.drawLine(0, 0, lw, 0);
+ p.drawLine(0, lh, lw, lh);
+ break;
+ }
+ return;
+ }
+ if (m_orientation == Qt::Horizontal) {
+ const int dist = 3;
+ const int amplitude = qMin(3, h / 3);
+ const int base = h / 2;
+ int i = 0;
+ p.setPen(Qt::white);
+ for (i = 0; i < w / 3 +2; ++i)
+ p.drawLine(i * dist, base - amplitude, i * dist + dist / 2, base + amplitude);
+ p.setPen(Qt::blue);
+ for (i = 0; i < w / 3 +2; ++i)
+ p.drawLine(i * dist + dist / 2, base + amplitude, i * dist + dist, base - amplitude);
+ const int y = h/2;
+ p.drawLine(0, y-10, 0, y+10);
+ p.drawLine(w - 1, y-10, w - 1, y+10);
+ } else {
+ const int dist = 3;
+ const int amplitude = qMin(3, w / 3);
+ const int base = w / 2;
+ int i = 0;
+ p.setPen(Qt::white);
+ for (i = 0; i < h / 3 +2; ++i)
+ p.drawLine(base - amplitude, i * dist, base + amplitude,i * dist + dist / 2);
+ p.setPen(Qt::blue);
+ for (i = 0; i < h / 3 +2; ++i)
+ p.drawLine(base + amplitude, i * dist + dist / 2, base - amplitude, i * dist + dist);
+ const int x = w/2;
+ p.drawLine(x-10, 0, x+10, 0);
+ p.drawLine(x-10, h - 1, x+10, h - 1);
+ }
+}
+
+void Spacer::resizeEvent(QResizeEvent* e)
+{
+ QWidget::resizeEvent(e);
+ // When resized by widget handle dragging after a reset (QSize(0, 0)):
+ // Mark the property as changed (geometry and sizeHint are in sync except for 'changed').
+ if (m_formWindow) {
+ const QSize oldSize = e->oldSize();
+ if (oldSize.isNull() || oldSize.width() <= m_SizeOffset.width() || oldSize.height() <= m_SizeOffset.height())
+ if (QDesignerPropertySheetExtension *sheet = qt_extension<QDesignerPropertySheetExtension*>(m_formWindow->core()->extensionManager(), this))
+ sheet->setChanged(sheet->indexOf(QLatin1String("sizeHint")), true);
+ }
+
+ updateMask();
+
+ if (!m_interactive)
+ return;
+
+ if (!isInLayout()) { // Allow size-handle resize only if not in layout
+ const QSize currentSize = size();
+ if (currentSize.width() >= m_SizeOffset.width() && currentSize.height() >= m_SizeOffset.height())
+ m_sizeHint = currentSize - m_SizeOffset;
+ }
+}
+
+void Spacer::updateMask()
+{
+ QRegion r(rect());
+ const int w = width();
+ const int h = height();
+ if (w > 1 && h > 1) {
+ if (m_orientation == Qt::Horizontal) {
+ const int amplitude = qMin(3, h / 3);
+ const int base = h / 2;
+ r = r.subtract(QRect(1, 0, w - 2, base - amplitude));
+ r = r.subtract(QRect(1, base + amplitude, w - 2, h - base - amplitude));
+ } else {
+ const int amplitude = qMin(3, w / 3);
+ const int base = w / 2;
+ r = r.subtract(QRect(0, 1, base - amplitude, h - 2));
+ r = r.subtract(QRect(base + amplitude, 1, w - base - amplitude, h - 2));
+ }
+ }
+ setMask(r);
+}
+
+void Spacer::setSizeType(QSizePolicy::Policy t)
+{
+ const QSizePolicy sizeP = m_orientation == Qt::Vertical ? QSizePolicy(QSizePolicy::Minimum, t) : QSizePolicy(t, QSizePolicy::Minimum);
+ setSizePolicy(sizeP);
+}
+
+
+QSizePolicy::Policy Spacer::sizeType() const
+{
+ return m_orientation == Qt::Vertical ? sizePolicy().verticalPolicy() : sizePolicy().horizontalPolicy();
+}
+
+Qt::Alignment Spacer::alignment() const
+{
+ // For grid layouts
+ return m_orientation == Qt::Vertical ? Qt::AlignHCenter : Qt::AlignVCenter;
+}
+
+QSize Spacer::sizeHint() const
+{
+ return isInLayout() ? m_sizeHint : m_sizeHint + m_SizeOffset;
+}
+
+QSize Spacer::sizeHintProperty() const
+{
+ return m_sizeHint;
+}
+
+void Spacer::setSizeHintProperty(const QSize &s)
+{
+ m_sizeHint = s;
+
+ if (!isInLayout()) // Visible resize only if not in layout
+ resize(s + m_SizeOffset);
+
+ updateGeometry();
+}
+
+Qt::Orientation Spacer::orientation() const
+{
+ return m_orientation;
+}
+
+void Spacer::setOrientation(Qt::Orientation o)
+{
+ if (m_orientation == o)
+ return;
+
+ const QSizePolicy::Policy st = sizeType(); // flip size type
+ m_orientation = o;
+ setSizeType(st);
+
+ if (m_interactive) {
+ m_sizeHint = QSize(m_sizeHint.height(), m_sizeHint.width());
+ if (!isInLayout())
+ resize(m_sizeHint + m_SizeOffset);
+ }
+
+ updateMask();
+ update();
+ updateGeometry();
+}
+
+void Spacer::updateToolTip()
+{
+ const QString format = m_orientation == Qt::Horizontal ? tr("Horizontal Spacer '%1', %2 x %3") : tr("Vertical Spacer '%1', %2 x %3");
+ QString msg = format.arg(objectName()).arg(m_sizeHint.width()).arg(m_sizeHint.height());
+ setToolTip(msg);
+}
+
+QT_END_NAMESPACE