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00010 #ifndef QWT_PICKER
00011 #define QWT_PICKER 1
00012
00013 #include "qwt_global.h"
00014 #include "qwt_text.h"
00015 #include "qwt_event_pattern.h"
00016 #include <qobject.h>
00017 #include <qpen.h>
00018 #include <qfont.h>
00019 #include <qrect.h>
00020
00021 class QWidget;
00022 class QMouseEvent;
00023 class QWheelEvent;
00024 class QKeyEvent;
00025 class QwtPickerMachine;
00026
00093 class QWT_EXPORT QwtPicker: public QObject, public QwtEventPattern
00094 {
00095 Q_OBJECT
00096
00097 Q_ENUMS( RubberBand )
00098 Q_ENUMS( DisplayMode )
00099 Q_ENUMS( ResizeMode )
00100
00101 Q_PROPERTY( bool isEnabled READ isEnabled WRITE setEnabled )
00102 Q_PROPERTY( ResizeMode resizeMode READ resizeMode WRITE setResizeMode )
00103
00104 Q_PROPERTY( DisplayMode trackerMode READ trackerMode WRITE setTrackerMode )
00105 Q_PROPERTY( QPen trackerPen READ trackerPen WRITE setTrackerPen )
00106 Q_PROPERTY( QFont trackerFont READ trackerFont WRITE setTrackerFont )
00107
00108 Q_PROPERTY( RubberBand rubberBand READ rubberBand WRITE setRubberBand )
00109 Q_PROPERTY( QPen rubberBandPen READ rubberBandPen WRITE setRubberBandPen )
00110
00111 public:
00119 enum RubberBand
00120 {
00122 NoRubberBand = 0,
00123
00125 HLineRubberBand,
00126
00128 VLineRubberBand,
00129
00131 CrossRubberBand,
00132
00134 RectRubberBand,
00135
00137 EllipseRubberBand,
00138
00140 PolygonRubberBand,
00141
00146 UserRubberBand = 100
00147 };
00148
00153 enum DisplayMode
00154 {
00156 AlwaysOff,
00157
00159 AlwaysOn,
00160
00162 ActiveOnly
00163 };
00164
00173 enum ResizeMode
00174 {
00176 Stretch,
00177
00179 KeepSize
00180 };
00181
00182 explicit QwtPicker( QWidget *parent );
00183 explicit QwtPicker( RubberBand rubberBand,
00184 DisplayMode trackerMode, QWidget * );
00185
00186 virtual ~QwtPicker();
00187
00188 void setStateMachine( QwtPickerMachine * );
00189 const QwtPickerMachine *stateMachine() const;
00190 QwtPickerMachine *stateMachine();
00191
00192 void setRubberBand( RubberBand );
00193 RubberBand rubberBand() const;
00194
00195 void setTrackerMode( DisplayMode );
00196 DisplayMode trackerMode() const;
00197
00198 void setResizeMode( ResizeMode );
00199 ResizeMode resizeMode() const;
00200
00201 void setRubberBandPen( const QPen & );
00202 QPen rubberBandPen() const;
00203
00204 void setTrackerPen( const QPen & );
00205 QPen trackerPen() const;
00206
00207 void setTrackerFont( const QFont & );
00208 QFont trackerFont() const;
00209
00210 bool isEnabled() const;
00211 bool isActive() const;
00212
00213 virtual bool eventFilter( QObject *, QEvent * );
00214
00215 QWidget *parentWidget();
00216 const QWidget *parentWidget() const;
00217
00218 virtual QRect pickRect() const;
00219
00220 virtual void drawRubberBand( QPainter * ) const;
00221 virtual void drawTracker( QPainter * ) const;
00222
00223 virtual QwtText trackerText( const QPoint &pos ) const;
00224 QPoint trackerPosition() const;
00225 virtual QRect trackerRect( const QFont & ) const;
00226
00227 QPolygon selection() const;
00228
00229 public Q_SLOTS:
00230 void setEnabled( bool );
00231
00232 Q_SIGNALS:
00240 void activated( bool on );
00241
00248 void selected( const QPolygon &polygon );
00249
00256 void appended( const QPoint &pos );
00257
00265 void moved( const QPoint &pos );
00266
00273 void removed( const QPoint &pos );
00281 void changed( const QPolygon &selection );
00282
00283 protected:
00284 virtual QPolygon adjustedPoints( const QPolygon & ) const;
00285
00286 virtual void transition( const QEvent * );
00287
00288 virtual void begin();
00289 virtual void append( const QPoint & );
00290 virtual void move( const QPoint & );
00291 virtual void remove();
00292 virtual bool end( bool ok = true );
00293
00294 virtual bool accept( QPolygon & ) const;
00295 virtual void reset();
00296
00297 virtual void widgetMousePressEvent( QMouseEvent * );
00298 virtual void widgetMouseReleaseEvent( QMouseEvent * );
00299 virtual void widgetMouseDoubleClickEvent( QMouseEvent * );
00300 virtual void widgetMouseMoveEvent( QMouseEvent * );
00301 virtual void widgetWheelEvent( QWheelEvent * );
00302 virtual void widgetKeyPressEvent( QKeyEvent * );
00303 virtual void widgetKeyReleaseEvent( QKeyEvent * );
00304 virtual void widgetEnterEvent( QEvent * );
00305 virtual void widgetLeaveEvent( QEvent * );
00306
00307 virtual void stretchSelection( const QSize &oldSize,
00308 const QSize &newSize );
00309
00310 virtual void updateDisplay();
00311
00312 const QWidget *rubberBandWidget() const;
00313 const QWidget *trackerWidget() const;
00314
00315 const QPolygon &pickedPoints() const;
00316
00317 private:
00318 void init( QWidget *, RubberBand rubberBand, DisplayMode trackerMode );
00319
00320 void setMouseTracking( bool );
00321
00322 class PickerWidget;
00323 class PrivateData;
00324 PrivateData *d_data;
00325 };
00326
00327 #endif