mirror of
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298 lines
9.6 KiB
C++
298 lines
9.6 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Copyright (C) 2016-2019 Ivailo Monev
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**
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** This file is part of the Qt Designer of the Katie Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qdesigner_dnditem_p.h"
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#include "formwindowbase_p.h"
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#include "ui4_p.h"
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#include <QtGui/QPainter>
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#include <QtGui/QBitmap>
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#include <QtGui/QPixmap>
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#include <QtGui/QImage>
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#include <QtGui/QLabel>
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#include <QtGui/QDrag>
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#include <QtGui/QCursor>
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#include <QtGui/qevent.h>
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#include <QtGui/QRgb>
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#include <QtCore/qmap.h>
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QT_BEGIN_NAMESPACE
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namespace qdesigner_internal {
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QDesignerDnDItem::QDesignerDnDItem(DropType type, QWidget *source) :
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m_source(source),
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m_type(type),
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m_dom_ui(0),
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m_widget(0),
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m_decoration(0)
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{
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}
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void QDesignerDnDItem::init(DomUI *ui, QWidget *widget, QWidget *decoration,
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const QPoint &global_mouse_pos)
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{
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Q_ASSERT(widget != 0 || ui != 0);
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Q_ASSERT(decoration != 0);
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m_dom_ui = ui;
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m_widget = widget;
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m_decoration = decoration;
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m_hot_spot = global_mouse_pos - m_decoration->geometry().topLeft();
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}
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QDesignerDnDItem::~QDesignerDnDItem()
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{
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if (m_decoration != 0)
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m_decoration->deleteLater();
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delete m_dom_ui;
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}
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DomUI *QDesignerDnDItem::domUi() const
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{
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return m_dom_ui;
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}
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QWidget *QDesignerDnDItem::decoration() const
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{
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return m_decoration;
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}
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QPoint QDesignerDnDItem::hotSpot() const
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{
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return m_hot_spot;
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}
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QWidget *QDesignerDnDItem::widget() const
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{
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return m_widget;
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}
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QDesignerDnDItem::DropType QDesignerDnDItem::type() const
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{
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return m_type;
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}
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QWidget *QDesignerDnDItem::source() const
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{
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return m_source;
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}
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void QDesignerDnDItem::setDomUi(DomUI *dom_ui)
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{
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delete m_dom_ui;
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m_dom_ui = dom_ui;
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}
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// ---------- QDesignerMimeData
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// Make pixmap transparent, on Unix usually does not work.
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// #define TRANSPARENT_DRAG_PIXMAP
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QDesignerMimeData::QDesignerMimeData(const QDesignerDnDItems &items, QDrag *drag) :
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m_items(items)
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{
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enum { Alpha = 200 };
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QPoint decorationTopLeft;
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switch (m_items.size()) {
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case 0:
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break;
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case 1: {
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QWidget *deco = m_items.first()->decoration();
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decorationTopLeft = deco->pos();
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const QPixmap widgetPixmap = QPixmap::grabWidget(deco);
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#ifdef TRANSPARENT_DRAG_PIXMAP
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QImage image(widgetPixmap.size(), QImage::Format_ARGB32);
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image.fill(QColor(Qt::transparent).rgba());
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QPainter painter(&image);
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painter.drawPixmap(QPoint(0, 0), widgetPixmap);
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painter.end();
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setImageTransparency(image, Alpha);
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drag->setPixmap(QPixmap::fromImage(image));
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#else
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drag->setPixmap(widgetPixmap);
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#endif
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}
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break;
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default: {
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// determine size of drag decoration by uniting all geometries
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const QDesignerDnDItems::const_iterator cend = m_items.constEnd();
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QDesignerDnDItems::const_iterator it =m_items.constBegin();
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QRect unitedGeometry = (*it)->decoration()->geometry();
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for (++it; it != cend; ++it )
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unitedGeometry = unitedGeometry .united((*it)->decoration()->geometry());
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// paint with offset. At the same time, create a mask bitmap, containing widget rectangles.
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QImage image(unitedGeometry.size(), QImage::Format_ARGB32);
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image.fill(QColor(Qt::transparent).rgba());
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QBitmap mask(unitedGeometry.size());
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mask.clear();
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// paint with offset, determine action
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QPainter painter(&image);
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QPainter maskPainter(&mask);
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decorationTopLeft = unitedGeometry.topLeft();
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for (it = m_items.constBegin() ; it != cend; ++it ) {
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QWidget *w = (*it)->decoration();
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const QPixmap wp = QPixmap::grabWidget(w);
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const QPoint pos = w->pos() - decorationTopLeft;
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painter.drawPixmap(pos, wp);
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maskPainter.fillRect(QRect(pos, wp.size()), Qt::color1);
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}
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painter.end();
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maskPainter.end();
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#ifdef TRANSPARENT_DRAG_PIXMAP
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setImageTransparency(image, Alpha);
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#endif
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QPixmap pixmap = QPixmap::fromImage(image);
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pixmap.setMask(mask);
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drag->setPixmap(pixmap);
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}
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break;
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}
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// determine hot spot and reconstruct the exact starting position as form window
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// introduces some offset when detecting DnD
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m_globalStartPos = m_items.first()->decoration()->pos() + m_items.first()->hotSpot();
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m_hotSpot = m_globalStartPos - decorationTopLeft;
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drag->setHotSpot(m_hotSpot);
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drag->setMimeData(this);
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}
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QDesignerMimeData::~QDesignerMimeData()
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{
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const QDesignerDnDItems::const_iterator cend = m_items.constEnd();
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for (QDesignerDnDItems::const_iterator it = m_items.constBegin(); it != cend; ++it )
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delete *it;
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}
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Qt::DropAction QDesignerMimeData::proposedDropAction() const
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{
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return m_items.first()->type() == QDesignerDnDItemInterface::CopyDrop ? Qt::CopyAction : Qt::MoveAction;
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}
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Qt::DropAction QDesignerMimeData::execDrag(const QDesignerDnDItems &items, QWidget * dragSource)
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{
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if (items.empty())
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return Qt::IgnoreAction;
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QDrag *drag = new QDrag(dragSource);
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QDesignerMimeData *mimeData = new QDesignerMimeData(items, drag);
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// Store pointers to widgets that are to be re-shown if a move operation is canceled
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QWidgetList reshowWidgets;
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const QDesignerDnDItems::const_iterator cend = items.constEnd();
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for (QDesignerDnDItems::const_iterator it = items.constBegin(); it != cend; ++it )
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if (QWidget *w = (*it)->widget())
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if ((*it)->type() == QDesignerDnDItemInterface::MoveDrop)
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reshowWidgets.push_back(w);
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const Qt::DropAction executedAction = drag->exec(Qt::CopyAction|Qt::MoveAction, mimeData->proposedDropAction());
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if (executedAction == Qt::IgnoreAction && !reshowWidgets.empty())
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foreach (QWidget *w, reshowWidgets)
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w->show();
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return executedAction;
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}
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void QDesignerMimeData::moveDecoration(const QPoint &globalPos) const
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{
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const QPoint relativeDistance = globalPos - m_globalStartPos;
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const QDesignerDnDItems::const_iterator cend = m_items.constEnd();
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for (QDesignerDnDItems::const_iterator it =m_items.constBegin(); it != cend; ++it ) {
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QWidget *w = (*it)->decoration();
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w->move(w->pos() + relativeDistance);
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}
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}
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void QDesignerMimeData::removeMovedWidgetsFromSourceForm(const QDesignerDnDItems &items)
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{
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typedef QMultiMap<FormWindowBase *, QWidget *> FormWidgetMap;
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FormWidgetMap formWidgetMap;
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// Find moved widgets per form
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const QDesignerDnDItems::const_iterator cend = items.constEnd();
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for (QDesignerDnDItems::const_iterator it = items.constBegin(); it != cend; ++it )
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if ((*it)->type() == QDesignerDnDItemInterface::MoveDrop)
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if (QWidget *w = (*it)->widget())
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if (FormWindowBase *fb = qobject_cast<FormWindowBase *>((*it)->source()))
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formWidgetMap.insert(fb, w);
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if (formWidgetMap.empty())
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return;
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foreach (FormWindowBase * fb, formWidgetMap.keys())
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fb->deleteWidgetList(formWidgetMap.values(fb));
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}
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void QDesignerMimeData::acceptEventWithAction(Qt::DropAction desiredAction, QDropEvent *e)
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{
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if (e->proposedAction() == desiredAction) {
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e->acceptProposedAction();
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} else {
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e->setDropAction(desiredAction);
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e->accept();
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}
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}
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void QDesignerMimeData::acceptEvent(QDropEvent *e) const
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{
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acceptEventWithAction(proposedDropAction(), e);
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}
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void QDesignerMimeData::setImageTransparency(QImage &image, int alpha)
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{
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const int height = image.height();
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for (int l = 0; l < height; l++) {
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QRgb *line = reinterpret_cast<QRgb *>(image.scanLine(l));
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QRgb *lineEnd = line + image.width();
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for ( ; line < lineEnd; line++) {
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const QRgb rgba = *line;
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*line = qRgba(qRed(rgba), qGreen(rgba), qBlue(rgba), alpha);
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}
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}
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}
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} // namespace qdesigner_internal
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QT_END_NAMESPACE
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#include <moc_qdesigner_dnditem_p.h>
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