104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
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/* -*- 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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