[89] | 1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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| 2 | * Qwt Widget Library
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| 3 | * Copyright (C) 1997 Josef Wilgen
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| 4 | * Copyright (C) 2002 Uwe Rathmann
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the Qwt License, Version 1.0
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| 8 | *****************************************************************************/
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| 9 |
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| 10 | #ifndef QWT_PANNER_H
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| 11 | #define QWT_PANNER_H 1
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| 12 |
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| 13 | #include <qnamespace.h>
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| 14 | #include <qwidget.h>
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| 15 | #include "qwt_global.h"
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| 16 |
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| 17 | class QCursor;
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| 18 |
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| 19 | /*!
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| 20 | \brief QwtPanner provides panning of a widget
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| 21 |
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| 22 | QwtPanner grabs the contents of a widget, that can be dragged
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| 23 | in all directions. The offset between the start and the end position
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| 24 | is emitted by the panned signal.
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| 25 |
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| 26 | QwtPanner grabs the content of the widget into a pixmap and moves
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| 27 | the pixmap around, without initiating any repaint events for the widget.
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| 28 | Areas, that are not part of content are not painted while panning
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| 29 | in in process. This makes panning fast enough for widgets, where
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| 30 | repaints are too slow for mouse movements.
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| 31 |
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| 32 | For widgets, where repaints are very fast it might be better to
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| 33 | implement panning manually by mapping mouse events into paint events.
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| 34 | */
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| 35 | class QWT_EXPORT QwtPanner: public QWidget
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| 36 | {
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| 37 | Q_OBJECT
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| 38 |
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| 39 | public:
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| 40 | QwtPanner(QWidget* parent);
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| 41 | virtual ~QwtPanner();
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| 42 |
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| 43 | void setEnabled(bool);
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| 44 | bool isEnabled() const;
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| 45 |
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| 46 | void setMouseButton(int button, int buttonState = Qt::NoButton);
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| 47 | void getMouseButton(int &button, int &buttonState) const;
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| 48 | void setAbortKey(int key, int state = Qt::NoButton);
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| 49 | void getAbortKey(int &key, int &state) const;
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| 50 |
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| 51 | void setCursor(const QCursor &);
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| 52 | const QCursor cursor() const;
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| 53 |
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| 54 | #if QT_VERSION >= 0x040000
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| 55 | void setOrientations(Qt::Orientations);
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| 56 | Qt::Orientations orientations() const;
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| 57 | #else
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| 58 | void enableOrientation(Qt::Orientation, bool enable);
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| 59 | #endif
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| 60 |
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| 61 | bool isOrientationEnabled(Qt::Orientation) const;
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| 62 |
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| 63 | virtual bool eventFilter(QObject *, QEvent *);
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| 64 |
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| 65 | signals:
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| 66 | /*!
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| 67 | Signal emitted, when panning is done
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| 68 |
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| 69 | \param dx Offset in horizontal direction
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| 70 | \param dy Offset in vertical direction
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| 71 | */
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| 72 | void panned(int dx, int dy);
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| 73 |
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| 74 | /*!
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| 75 | Signal emitted, while the widget moved, but panning
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| 76 | is not finished.
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| 77 |
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| 78 | \param dx Offset in horizontal direction
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| 79 | \param dy Offset in vertical direction
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| 80 | */
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| 81 | void moved(int dx, int dy);
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| 82 |
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| 83 | protected:
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| 84 | virtual void widgetMousePressEvent(QMouseEvent *);
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| 85 | virtual void widgetMouseReleaseEvent(QMouseEvent *);
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| 86 | virtual void widgetMouseMoveEvent(QMouseEvent *);
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| 87 | virtual void widgetKeyPressEvent(QKeyEvent *);
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| 88 | virtual void widgetKeyReleaseEvent(QKeyEvent *);
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| 89 |
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| 90 | virtual void paintEvent(QPaintEvent *);
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| 91 |
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| 92 | private:
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| 93 | #ifndef QT_NO_CURSOR
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| 94 | void showCursor(bool);
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| 95 | #endif
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| 96 |
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| 97 | class PrivateData;
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| 98 | PrivateData *d_data;
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| 99 | };
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| 100 |
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| 101 | #endif
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