/**************************************************************************** | |
** | |
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
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** Contact: Nokia Corporation (qt-info@nokia.com) | |
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** This file is part of the Qt Designer of the Qt Toolkit. | |
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** $QT_BEGIN_LICENSE:LGPL$ | |
** GNU Lesser General Public License Usage | |
** 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 | |
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** file. Please review the following information to ensure the GNU Lesser | |
** General Public License version 2.1 requirements will be met: | |
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** 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. | |
** | |
** GNU General Public License Usage | |
** Alternatively, this file may be used under the terms of the GNU General | |
** Public License version 3.0 as published by the Free Software Foundation | |
** and appearing in the file LICENSE.GPL included in the packaging of this | |
** file. Please review the following information to ensure the GNU General | |
** Public License version 3.0 requirements will be met: | |
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** Other Usage | |
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****************************************************************************/ | |
// | |
// W A R N I N G | |
// ------------- | |
// | |
// This file is not part of the Qt API. It exists for the convenience | |
// of Qt Designer. This header | |
// file may change from version to version without notice, or even be removed. | |
// | |
// We mean it. | |
// | |
#ifndef ZOOMWIDGET_H | |
#define ZOOMWIDGET_H | |
#include "shared_global_p.h" | |
#include <QtGui/QGraphicsView> | |
#include <QtGui/QGraphicsProxyWidget> | |
#include <QtCore/QList> | |
QT_BEGIN_NAMESPACE | |
class QGraphicsScene; | |
class QMenu; | |
class QAction; | |
class QActionGroup; | |
namespace qdesigner_internal { | |
// A checkable zoom menu action group. Operates in percent. | |
class QDESIGNER_SHARED_EXPORT ZoomMenu : public QObject { | |
Q_OBJECT | |
Q_DISABLE_COPY(ZoomMenu) | |
public: | |
ZoomMenu(QObject *parent = 0); | |
void addActions(QMenu *m); | |
int zoom() const; | |
// Return a list of available zoom values. | |
static QList<int> zoomValues(); | |
public slots: | |
void setZoom(int percent); | |
signals: | |
void zoomChanged(int); | |
private slots: | |
void slotZoomMenu(QAction *); | |
private: | |
static int zoomOf(const QAction *a); | |
QActionGroup *m_menuActions; | |
}; | |
/* Zoom view: A QGraphicsView with a zoom menu */ | |
class QDESIGNER_SHARED_EXPORT ZoomView : public QGraphicsView | |
{ | |
Q_PROPERTY(int zoom READ zoom WRITE setZoom DESIGNABLE true SCRIPTABLE true) | |
Q_PROPERTY(bool zoomContextMenuEnabled READ isZoomContextMenuEnabled WRITE setZoomContextMenuEnabled DESIGNABLE true SCRIPTABLE true) | |
Q_OBJECT | |
Q_DISABLE_COPY(ZoomView) | |
public: | |
ZoomView(QWidget *parent = 0); | |
/* Zoom in percent (for easily implementing menus) and qreal zoomFactor | |
* in sync */ | |
int zoom() const; // in percent | |
qreal zoomFactor() const; | |
// Zoom Menu on QGraphicsView. | |
bool isZoomContextMenuEnabled() const; | |
void setZoomContextMenuEnabled(bool e); | |
QGraphicsScene &scene() { return *m_scene; } | |
const QGraphicsScene &scene() const { return *m_scene; } | |
// Helpers for menu | |
ZoomMenu *zoomMenu(); | |
QPoint scrollPosition() const; | |
void setScrollPosition(const QPoint& pos); | |
void scrollToOrigin(); | |
public slots: | |
void setZoom(int percent); | |
void showContextMenu(const QPoint &globalPos); | |
protected: | |
void contextMenuEvent(QContextMenuEvent *event); | |
// Overwrite for implementing additional behaviour when doing setZoom(); | |
virtual void applyZoom(); | |
private: | |
QGraphicsScene *m_scene; | |
int m_zoom; | |
qreal m_zoomFactor; | |
bool m_zoomContextMenuEnabled; | |
bool m_resizeBlocked; | |
ZoomMenu *m_zoomMenu; | |
}; | |
/* The proxy widget used in ZoomWidget. It refuses to move away from 0,0, | |
* This behaviour is required for Windows only. */ | |
class QDESIGNER_SHARED_EXPORT ZoomProxyWidget : public QGraphicsProxyWidget { | |
Q_DISABLE_COPY(ZoomProxyWidget) | |
public: | |
explicit ZoomProxyWidget(QGraphicsItem *parent = 0, Qt::WindowFlags wFlags = 0); | |
protected: | |
virtual QVariant itemChange(GraphicsItemChange change, const QVariant &value); | |
}; | |
/* Zoom widget: A QGraphicsView-based container for a widget that allows for | |
* zooming it. Communicates changes in size in the following ways: | |
* 1) Embedded widget wants to resize: Listen for its resize in event filter | |
* and resize | |
* 2) Zoom is changed: resize to fully display the embedded widget | |
* 3) Outer widget changes (by manually resizing the window: | |
* Pass the scaled change on to the embedded widget. | |
* Provides helper functions for a zoom context menu on the widget. */ | |
class QDESIGNER_SHARED_EXPORT ZoomWidget : public ZoomView | |
{ | |
Q_PROPERTY(bool widgetZoomContextMenuEnabled READ isWidgetZoomContextMenuEnabled WRITE setWidgetZoomContextMenuEnabled DESIGNABLE true SCRIPTABLE true) | |
Q_PROPERTY(bool itemAcceptDrops READ itemAcceptDrops WRITE setItemAcceptDrops DESIGNABLE true SCRIPTABLE true) | |
Q_OBJECT | |
Q_DISABLE_COPY(ZoomWidget) | |
public: | |
ZoomWidget(QWidget *parent = 0); | |
void setWidget(QWidget *w, Qt::WindowFlags wFlags = 0); | |
const QGraphicsProxyWidget *proxy() const { return m_proxy; } | |
QGraphicsProxyWidget *proxy() { return m_proxy; } | |
/* Enable the zoom Menu on the Widget (as opposed ZoomView's menu which | |
* is on the canvas). */ | |
bool isWidgetZoomContextMenuEnabled() const; | |
void setWidgetZoomContextMenuEnabled(bool e); | |
void setItemAcceptDrops(bool); | |
bool itemAcceptDrops() const; | |
virtual QSize minimumSizeHint() const; | |
virtual QSize sizeHint() const; | |
bool zoomedEventFilter(QObject *watched, QEvent *event); | |
public slots: | |
// debug state | |
void dump() const; | |
protected: | |
void resizeEvent(QResizeEvent * event); | |
// Overwritten from ZoomView | |
virtual void applyZoom(); | |
// Overwrite to actually perform a resize. This is required if we are in a layout. Default does resize(). | |
virtual void doResize(const QSize &s); | |
private: | |
// Factory function for QGraphicsProxyWidgets which can be overwritten. Default creates a ZoomProxyWidget | |
virtual QGraphicsProxyWidget *createProxyWidget(QGraphicsItem *parent = 0, Qt::WindowFlags wFlags = 0) const; | |
QSize widgetSizeToViewSize(const QSize &s, bool *ptrToValid = 0) const; | |
void resizeToWidgetSize(); | |
QSize viewPortMargin() const; | |
QSize widgetSize() const; | |
QSizeF widgetDecorationSizeF() const; | |
QGraphicsProxyWidget *m_proxy; | |
bool m_viewResizeBlocked; | |
bool m_widgetResizeBlocked; | |
bool m_widgetZoomContextMenuEnabled; | |
}; | |
} // namespace qdesigner_internal | |
QT_END_NAMESPACE | |
#endif |