Qwt User's Guide 6.1.4

qwt_picker.h
1 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
2 * Qwt Widget Library
3 * Copyright (C) 1997 Josef Wilgen
4 * Copyright (C) 2002 Uwe Rathmann
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the Qwt License, Version 1.0
8 *****************************************************************************/
9
10 #ifndef QWT_PICKER
11 #define QWT_PICKER 1
12
13 #include "qwt_global.h"
14 #include "qwt_text.h"
15 #include "qwt_event_pattern.h"
16 #include <qobject.h>
17 #include <qpen.h>
18 #include <qfont.h>
19 #include <qrect.h>
20 #include <qpainterpath.h>
21
22 class QWidget;
23 class QMouseEvent;
24 class QWheelEvent;
25 class QKeyEvent;
26 class QwtPickerMachine;
27 class QwtWidgetOverlay;
28
98 class QWT_EXPORT QwtPicker: public QObject, public QwtEventPattern
99 {
100 Q_OBJECT
101
102 Q_ENUMS( RubberBand DisplayMode ResizeMode )
103
104 Q_PROPERTY( bool isEnabled READ isEnabled WRITE setEnabled )
105 Q_PROPERTY( ResizeMode resizeMode READ resizeMode WRITE setResizeMode )
106
107 Q_PROPERTY( DisplayMode trackerMode READ trackerMode WRITE setTrackerMode )
108 Q_PROPERTY( QPen trackerPen READ trackerPen WRITE setTrackerPen )
109 Q_PROPERTY( QFont trackerFont READ trackerFont WRITE setTrackerFont )
110
111 Q_PROPERTY( RubberBand rubberBand READ rubberBand WRITE setRubberBand )
112 Q_PROPERTY( QPen rubberBandPen READ rubberBandPen WRITE setRubberBandPen )
113
114 public:
122 enum RubberBand
123 {
125 NoRubberBand = 0,
126
128 HLineRubberBand,
129
131 VLineRubberBand,
132
134 CrossRubberBand,
135
137 RectRubberBand,
138
140 EllipseRubberBand,
141
143 PolygonRubberBand,
144
149 UserRubberBand = 100
150 };
151
156 enum DisplayMode
157 {
159 AlwaysOff,
160
162 AlwaysOn,
163
165 ActiveOnly
166 };
167
176 enum ResizeMode
177 {
179 Stretch,
180
182 KeepSize
183 };
184
185 explicit QwtPicker( QWidget *parent );
186 explicit QwtPicker( RubberBand rubberBand,
187 DisplayMode trackerMode, QWidget * );
188
189 virtual ~QwtPicker();
190
191 void setStateMachine( QwtPickerMachine * );
192 const QwtPickerMachine *stateMachine() const;
193 QwtPickerMachine *stateMachine();
194
195 void setRubberBand( RubberBand );
196 RubberBand rubberBand() const;
197
198 void setTrackerMode( DisplayMode );
199 DisplayMode trackerMode() const;
200
201 void setResizeMode( ResizeMode );
202 ResizeMode resizeMode() const;
203
204 void setRubberBandPen( const QPen & );
205 QPen rubberBandPen() const;
206
207 void setTrackerPen( const QPen & );
208 QPen trackerPen() const;
209
210 void setTrackerFont( const QFont & );
211 QFont trackerFont() const;
212
213 bool isEnabled() const;
214 bool isActive() const;
215
216 virtual bool eventFilter( QObject *, QEvent * );
217
218 QWidget *parentWidget();
219 const QWidget *parentWidget() const;
220
221 virtual QPainterPath pickArea() const;
222
223 virtual void drawRubberBand( QPainter * ) const;
224 virtual void drawTracker( QPainter * ) const;
225
226 virtual QRegion rubberBandMask() const;
227
228 virtual QwtText trackerText( const QPoint &pos ) const;
229 QPoint trackerPosition() const;
230 virtual QRect trackerRect( const QFont & ) const;
231
232 QPolygon selection() const;
233
234 public Q_SLOTS:
235 void setEnabled( bool );
236
237 Q_SIGNALS:
245 void activated( bool on );
246
253 void selected( const QPolygon &polygon );
254
261 void appended( const QPoint &pos );
262
270 void moved( const QPoint &pos );
271
279 void removed( const QPoint &pos );
287 void changed( const QPolygon &selection );
288
289 protected:
290 virtual QPolygon adjustedPoints( const QPolygon & ) const;
291
292 virtual void transition( const QEvent * );
293
294 virtual void begin();
295 virtual void append( const QPoint & );
296 virtual void move( const QPoint & );
297 virtual void remove();
298 virtual bool end( bool ok = true );
299
300 virtual bool accept( QPolygon & ) const;
301 virtual void reset();
302
303 virtual void widgetMousePressEvent( QMouseEvent * );
304 virtual void widgetMouseReleaseEvent( QMouseEvent * );
305 virtual void widgetMouseDoubleClickEvent( QMouseEvent * );
306 virtual void widgetMouseMoveEvent( QMouseEvent * );
307 virtual void widgetWheelEvent( QWheelEvent * );
308 virtual void widgetKeyPressEvent( QKeyEvent * );
309 virtual void widgetKeyReleaseEvent( QKeyEvent * );
310 virtual void widgetEnterEvent( QEvent * );
311 virtual void widgetLeaveEvent( QEvent * );
312
313 virtual void stretchSelection(
314 const QSize &oldSize, const QSize &newSize );
315
316 virtual void updateDisplay();
317
318 const QwtWidgetOverlay *rubberBandOverlay() const;
319 const QwtWidgetOverlay *trackerOverlay() const;
320
321 const QPolygon &pickedPoints() const;
322
323 private:
324 void init( QWidget *, RubberBand rubberBand, DisplayMode trackerMode );
325
326 void setMouseTracking( bool );
327
328 class PrivateData;
329 PrivateData *d_data;
330 };
331
332 #endif
QwtPicker::Stretch
All points are scaled according to the new size,.
Definition: qwt_picker.h:179
QwtPicker::HLineRubberBand
A horizontal line ( only for QwtPickerMachine::PointSelection )
Definition: qwt_picker.h:128
QwtText
A class representing a text.
Definition: qwt_text.h:51
QwtPickerMachine
A state machine for QwtPicker selections.
Definition: qwt_picker_machine.h:28
QwtPicker::ResizeMode
ResizeMode
Definition: qwt_picker.h:176
QwtPicker::DisplayMode
DisplayMode
Display mode.
Definition: qwt_picker.h:156
QwtPicker::RubberBand
RubberBand
Definition: qwt_picker.h:122
QwtPicker::PolygonRubberBand
A polygon ( only for QwtPickerMachine::PolygonSelection )
Definition: qwt_picker.h:143
QwtEventPattern
A collection of event patterns.
Definition: qwt_event_pattern.h:29
QwtWidgetOverlay
An overlay for a widget.
Definition: qwt_widget_overlay.h:40
QwtPicker::CrossRubberBand
A crosshair ( only for QwtPickerMachine::PointSelection )
Definition: qwt_picker.h:134
QwtPicker::AlwaysOff
Display never.
Definition: qwt_picker.h:159
QwtPicker::EllipseRubberBand
An ellipse ( only for QwtPickerMachine::RectSelection )
Definition: qwt_picker.h:140
QwtPicker::VLineRubberBand
A vertical line ( only for QwtPickerMachine::PointSelection )
Definition: qwt_picker.h:131
QwtPicker
QwtPicker provides selections on a widget.
Definition: qwt_picker.h:98
QwtPicker::AlwaysOn
Display always.
Definition: qwt_picker.h:162
QwtPicker::RectRubberBand
A rectangle ( only for QwtPickerMachine::RectSelection )
Definition: qwt_picker.h:137