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103 lines
2.9 KiB
103 lines
2.9 KiB
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- ***************************** |
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* Qwt Widget Library |
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* Copyright (C) 1997 Josef Wilgen |
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* Copyright (C) 2002 Uwe Rathmann |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the Qwt License, Version 1.0 |
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*****************************************************************************/ |
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#ifndef QWT_PANNER_H |
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#define QWT_PANNER_H 1 |
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#include "qwt_global.h" |
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#include <qwidget.h> |
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#include <qpixmap.h> |
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class QCursor; |
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/*! |
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\brief QwtPanner provides panning of a widget |
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QwtPanner grabs the contents of a widget, that can be dragged |
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in all directions. The offset between the start and the end position |
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is emitted by the panned signal. |
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QwtPanner grabs the content of the widget into a pixmap and moves |
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the pixmap around, without initiating any repaint events for the widget. |
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Areas, that are not part of content are not painted while panning. |
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This makes panning fast enough for widgets, where |
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repaints are too slow for mouse movements. |
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For widgets, where repaints are very fast it might be better to |
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implement panning manually by mapping mouse events into paint events. |
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*/ |
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class QWT_EXPORT QwtPanner: public QWidget |
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{ |
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Q_OBJECT |
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public: |
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QwtPanner( QWidget* parent ); |
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virtual ~QwtPanner(); |
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void setEnabled( bool ); |
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bool isEnabled() const; |
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void setMouseButton( Qt::MouseButton, |
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Qt::KeyboardModifiers = Qt::NoModifier ); |
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void getMouseButton( Qt::MouseButton &button, |
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Qt::KeyboardModifiers & ) const; |
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void setAbortKey( int key, Qt::KeyboardModifiers = Qt::NoModifier ); |
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void getAbortKey( int &key, Qt::KeyboardModifiers & ) const; |
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void setCursor( const QCursor & ); |
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const QCursor cursor() const; |
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void setOrientations( Qt::Orientations ); |
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Qt::Orientations orientations() const; |
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bool isOrientationEnabled( Qt::Orientation ) const; |
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virtual bool eventFilter( QObject *, QEvent * ); |
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Q_SIGNALS: |
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/*! |
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Signal emitted, when panning is done |
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\param dx Offset in horizontal direction |
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\param dy Offset in vertical direction |
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*/ |
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void panned( int dx, int dy ); |
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/*! |
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Signal emitted, while the widget moved, but panning |
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is not finished. |
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\param dx Offset in horizontal direction |
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\param dy Offset in vertical direction |
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*/ |
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void moved( int dx, int dy ); |
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protected: |
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virtual void widgetMousePressEvent( QMouseEvent * ); |
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virtual void widgetMouseReleaseEvent( QMouseEvent * ); |
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virtual void widgetMouseMoveEvent( QMouseEvent * ); |
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virtual void widgetKeyPressEvent( QKeyEvent * ); |
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virtual void widgetKeyReleaseEvent( QKeyEvent * ); |
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virtual void paintEvent( QPaintEvent * ); |
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virtual QBitmap contentsMask() const; |
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virtual QPixmap grab() const; |
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private: |
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#ifndef QT_NO_CURSOR |
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void showCursor( bool ); |
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#endif |
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class PrivateData; |
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PrivateData *d_data; |
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}; |
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#endif
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