--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/designer/src/lib/shared/qdesigner_dnditem.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,300 @@
+/****************************************************************************
+**
+** 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 "qdesigner_dnditem_p.h"
+#include "formwindowbase_p.h"
+#include "ui4_p.h"
+
+#include <QtGui/QPainter>
+#include <QtGui/QBitmap>
+#include <QtGui/QPixmap>
+#include <QtGui/QImage>
+#include <QtGui/QLabel>
+#include <QtGui/QDrag>
+#include <QtGui/QCursor>
+#include <QtGui/QDropEvent>
+#include <QtGui/QRgb>
+
+#include <QtCore/QMultiMap>
+
+QT_BEGIN_NAMESPACE
+
+namespace qdesigner_internal {
+
+QDesignerDnDItem::QDesignerDnDItem(DropType type, QWidget *source) :
+ m_source(source),
+ m_type(type),
+ m_dom_ui(0),
+ m_widget(0),
+ m_decoration(0)
+{
+}
+
+void QDesignerDnDItem::init(DomUI *ui, QWidget *widget, QWidget *decoration,
+ const QPoint &global_mouse_pos)
+{
+ Q_ASSERT(widget != 0 || ui != 0);
+ Q_ASSERT(decoration != 0);
+
+ m_dom_ui = ui;
+ m_widget = widget;
+ m_decoration = decoration;
+
+ const QRect geometry = m_decoration->geometry();
+ m_hot_spot = global_mouse_pos - m_decoration->geometry().topLeft();
+}
+
+QDesignerDnDItem::~QDesignerDnDItem()
+{
+ if (m_decoration != 0)
+ m_decoration->deleteLater();
+ delete m_dom_ui;
+}
+
+DomUI *QDesignerDnDItem::domUi() const
+{
+ return m_dom_ui;
+}
+
+QWidget *QDesignerDnDItem::decoration() const
+{
+ return m_decoration;
+}
+
+QPoint QDesignerDnDItem::hotSpot() const
+{
+ return m_hot_spot;
+}
+
+QWidget *QDesignerDnDItem::widget() const
+{
+ return m_widget;
+}
+
+QDesignerDnDItem::DropType QDesignerDnDItem::type() const
+{
+ return m_type;
+}
+
+QWidget *QDesignerDnDItem::source() const
+{
+ return m_source;
+}
+
+void QDesignerDnDItem::setDomUi(DomUI *dom_ui)
+{
+ delete m_dom_ui;
+ m_dom_ui = dom_ui;
+}
+
+// ---------- QDesignerMimeData
+
+// Make pixmap transparent on Windows only. Mac is transparent by default, Unix usually does not work.
+#ifdef Q_WS_WIN
+# define TRANSPARENT_DRAG_PIXMAP
+#endif
+
+QDesignerMimeData::QDesignerMimeData(const QDesignerDnDItems &items, QDrag *drag) :
+ m_items(items)
+{
+ enum { Alpha = 200 };
+ QPoint decorationTopLeft;
+ switch (m_items.size()) {
+ case 0:
+ break;
+ case 1: {
+ QWidget *deco = m_items.first()->decoration();
+ decorationTopLeft = deco->pos();
+ const QPixmap widgetPixmap = QPixmap::grabWidget(deco);
+#ifdef TRANSPARENT_DRAG_PIXMAP
+ QImage image(widgetPixmap.size(), QImage::Format_ARGB32);
+ image.fill(QColor(Qt::transparent).rgba());
+ QPainter painter(&image);
+ painter.drawPixmap(QPoint(0, 0), widgetPixmap);
+ painter.end();
+ setImageTransparency(image, Alpha);
+ drag->setPixmap(QPixmap::fromImage(image));
+#else
+ drag->setPixmap(widgetPixmap);
+#endif
+ }
+ break;
+ default: {
+ // determine size of drag decoration by uniting all geometries
+ const QDesignerDnDItems::const_iterator cend = m_items.constEnd();
+ QDesignerDnDItems::const_iterator it =m_items.constBegin();
+ QRect unitedGeometry = (*it)->decoration()->geometry();
+ for (++it; it != cend; ++it )
+ unitedGeometry = unitedGeometry .united((*it)->decoration()->geometry());
+
+ // paint with offset. At the same time, create a mask bitmap, containing widget rectangles.
+ QImage image(unitedGeometry.size(), QImage::Format_ARGB32);
+ image.fill(QColor(Qt::transparent).rgba());
+ QBitmap mask(unitedGeometry.size());
+ mask.clear();
+ // paint with offset, determine action
+ QPainter painter(&image);
+ QPainter maskPainter(&mask);
+ decorationTopLeft = unitedGeometry.topLeft();
+ for (it = m_items.constBegin() ; it != cend; ++it ) {
+ QWidget *w = (*it)->decoration();
+ const QPixmap wp = QPixmap::grabWidget(w);
+ const QPoint pos = w->pos() - decorationTopLeft;
+ painter.drawPixmap(pos, wp);
+ maskPainter.fillRect(QRect(pos, wp.size()), Qt::color1);
+ }
+ painter.end();
+ maskPainter.end();
+#ifdef TRANSPARENT_DRAG_PIXMAP
+ setImageTransparency(image, Alpha);
+#endif
+ QPixmap pixmap = QPixmap::fromImage(image);
+ pixmap.setMask(mask);
+ drag->setPixmap(pixmap);
+ }
+ break;
+ }
+ // determine hot spot and reconstruct the exact starting position as form window
+ // introduces some offset when detecting DnD
+ m_globalStartPos = m_items.first()->decoration()->pos() + m_items.first()->hotSpot();
+ m_hotSpot = m_globalStartPos - decorationTopLeft;
+ drag->setHotSpot(m_hotSpot);
+
+ drag->setMimeData(this);
+}
+
+QDesignerMimeData::~QDesignerMimeData()
+{
+ const QDesignerDnDItems::const_iterator cend = m_items.constEnd();
+ for (QDesignerDnDItems::const_iterator it = m_items.constBegin(); it != cend; ++it )
+ delete *it;
+}
+
+Qt::DropAction QDesignerMimeData::proposedDropAction() const
+{
+ return m_items.first()->type() == QDesignerDnDItemInterface::CopyDrop ? Qt::CopyAction : Qt::MoveAction;
+}
+
+Qt::DropAction QDesignerMimeData::execDrag(const QDesignerDnDItems &items, QWidget * dragSource)
+{
+ if (items.empty())
+ return Qt::IgnoreAction;
+
+ QDrag *drag = new QDrag(dragSource);
+ QDesignerMimeData *mimeData = new QDesignerMimeData(items, drag);
+
+ // Store pointers to widgets that are to be re-shown if a move operation is canceled
+ QWidgetList reshowWidgets;
+ const QDesignerDnDItems::const_iterator cend = items.constEnd();
+ for (QDesignerDnDItems::const_iterator it = items.constBegin(); it != cend; ++it )
+ if (QWidget *w = (*it)->widget())
+ if ((*it)->type() == QDesignerDnDItemInterface::MoveDrop)
+ reshowWidgets.push_back(w);
+
+ const Qt::DropAction executedAction = drag->exec(Qt::CopyAction|Qt::MoveAction, mimeData->proposedDropAction());
+
+ if (executedAction == Qt::IgnoreAction && !reshowWidgets.empty())
+ foreach (QWidget *w, reshowWidgets)
+ w->show();
+
+ return executedAction;
+}
+
+
+void QDesignerMimeData::moveDecoration(const QPoint &globalPos) const
+{
+ const QPoint relativeDistance = globalPos - m_globalStartPos;
+ const QDesignerDnDItems::const_iterator cend = m_items.constEnd();
+ for (QDesignerDnDItems::const_iterator it =m_items.constBegin(); it != cend; ++it ) {
+ QWidget *w = (*it)->decoration();
+ w->move(w->pos() + relativeDistance);
+ }
+}
+
+void QDesignerMimeData::removeMovedWidgetsFromSourceForm(const QDesignerDnDItems &items)
+{
+ typedef QMultiMap<FormWindowBase *, QWidget *> FormWidgetMap;
+ FormWidgetMap formWidgetMap;
+ // Find moved widgets per form
+ const QDesignerDnDItems::const_iterator cend = items.constEnd();
+ for (QDesignerDnDItems::const_iterator it = items.constBegin(); it != cend; ++it )
+ if ((*it)->type() == QDesignerDnDItemInterface::MoveDrop)
+ if (QWidget *w = (*it)->widget())
+ if (FormWindowBase *fb = qobject_cast<FormWindowBase *>((*it)->source()))
+ formWidgetMap.insert(fb, w);
+ if (formWidgetMap.empty())
+ return;
+
+ foreach (FormWindowBase * fb, formWidgetMap.keys())
+ fb->deleteWidgetList(formWidgetMap.values(fb));
+}
+
+void QDesignerMimeData::acceptEventWithAction(Qt::DropAction desiredAction, QDropEvent *e)
+{
+ if (e->proposedAction() == desiredAction) {
+ e->acceptProposedAction();
+ } else {
+ e->setDropAction(desiredAction);
+ e->accept();
+ }
+}
+
+void QDesignerMimeData::acceptEvent(QDropEvent *e) const
+{
+ acceptEventWithAction(proposedDropAction(), e);
+}
+
+void QDesignerMimeData::setImageTransparency(QImage &image, int alpha)
+{
+ const int height = image.height();
+ for (int l = 0; l < height; l++) {
+ QRgb *line = reinterpret_cast<QRgb *>(image.scanLine(l));
+ QRgb *lineEnd = line + image.width();
+ for ( ; line < lineEnd; line++) {
+ const QRgb rgba = *line;
+ *line = qRgba(qRed(rgba), qGreen(rgba), qBlue(rgba), alpha);
+ }
+ }
+}
+
+} // namespace qdesigner_internal
+
+QT_END_NAMESPACE