Qwt User's Guide: qwt_plot.h Source File

Qwt User's Guide 6.3.0

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qwt_plot.h
1/******************************************************************************
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_PLOT_H
11#define QWT_PLOT_H
12
13#include "qwt_global.h"
14#include "qwt_axis_id.h"
15#include "qwt_plot_dict.h"
16
17#include <qframe.h>
18
19class QwtPlotLayout;
20class QwtAbstractLegend;
21class QwtScaleWidget;
22class QwtScaleEngine;
23class QwtScaleDiv;
24class QwtScaleMap;
25class QwtScaleDraw;
26class QwtTextLabel;
27class QwtInterval;
28class QwtText;
29template< typename T > class QList;
30
31// 6.1 compatibility definitions
32#define QWT_AXIS_COMPAT 1
33
78 class QWT_EXPORT QwtPlot : public QFrame, public QwtPlotDict
79{
80 Q_OBJECT
81
82 Q_PROPERTY( QBrush canvasBackground
83 READ canvasBackground WRITE setCanvasBackground )
84
85 Q_PROPERTY( bool autoReplot READ autoReplot WRITE setAutoReplot )
86
87 public:
93 enum LegendPosition
94 {
96 LeftLegend,
97
99 RightLegend,
100
102 BottomLegend,
103
105 TopLegend
106 };
107
108 explicit QwtPlot( QWidget* = NULL );
109 explicit QwtPlot( const QwtText& title, QWidget* = NULL );
110
111 virtual ~QwtPlot();
112
113 void setAutoReplot( bool = true );
114 bool autoReplot() const;
115
116 // Layout
117
118 void setPlotLayout( QwtPlotLayout* );
119
120 QwtPlotLayout* plotLayout();
121 const QwtPlotLayout* plotLayout() const;
122
123 // Title
124
125 void setTitle( const QString& );
126 void setTitle( const QwtText& );
127 QwtText title() const;
128
129 QwtTextLabel* titleLabel();
130 const QwtTextLabel* titleLabel() const;
131
132 // Footer
133
134 void setFooter( const QString& );
135 void setFooter( const QwtText& );
136 QwtText footer() const;
137
138 QwtTextLabel* footerLabel();
139 const QwtTextLabel* footerLabel() const;
140
141 // Canvas
142
143 void setCanvas( QWidget* );
144
145 QWidget* canvas();
146 const QWidget* canvas() const;
147
148 void setCanvasBackground( const QBrush& );
149 QBrush canvasBackground() const;
150
151 virtual QwtScaleMap canvasMap( QwtAxisId ) const;
152
153 double invTransform( QwtAxisId, double pos ) const;
154 double transform( QwtAxisId, double value ) const;
155
156 // Axes
157
158 bool isAxisValid( QwtAxisId ) const;
159
160 void setAxisVisible( QwtAxisId, bool on = true );
161 bool isAxisVisible( QwtAxisId ) const;
162
163 // Axes data
164
165 QwtScaleEngine* axisScaleEngine( QwtAxisId );
166 const QwtScaleEngine* axisScaleEngine( QwtAxisId ) const;
167 void setAxisScaleEngine( QwtAxisId, QwtScaleEngine* );
168
169 void setAxisAutoScale( QwtAxisId, bool on = true );
170 bool axisAutoScale( QwtAxisId ) const;
171
172 void setAxisFont( QwtAxisId, const QFont& );
173 QFont axisFont( QwtAxisId ) const;
174
175 void setAxisScale( QwtAxisId, double min, double max, double stepSize = 0 );
176 void setAxisScaleDiv( QwtAxisId, const QwtScaleDiv& );
177 void setAxisScaleDraw( QwtAxisId, QwtScaleDraw* );
178
179 double axisStepSize( QwtAxisId ) const;
180 QwtInterval axisInterval( QwtAxisId ) const;
181 const QwtScaleDiv& axisScaleDiv( QwtAxisId ) const;
182
183 const QwtScaleDraw* axisScaleDraw( QwtAxisId ) const;
184 QwtScaleDraw* axisScaleDraw( QwtAxisId );
185
186 const QwtScaleWidget* axisWidget( QwtAxisId ) const;
187 QwtScaleWidget* axisWidget( QwtAxisId );
188
189 void setAxisLabelAlignment( QwtAxisId, Qt::Alignment );
190 void setAxisLabelRotation( QwtAxisId, double rotation );
191
192 void setAxisTitle( QwtAxisId, const QString& );
193 void setAxisTitle( QwtAxisId, const QwtText& );
194 QwtText axisTitle( QwtAxisId ) const;
195
196 void setAxisMaxMinor( QwtAxisId, int maxMinor );
197 int axisMaxMinor( QwtAxisId ) const;
198
199 void setAxisMaxMajor( QwtAxisId, int maxMajor );
200 int axisMaxMajor( QwtAxisId ) const;
201
202 // Legend
203
204 void insertLegend( QwtAbstractLegend*,
205 LegendPosition = QwtPlot::RightLegend, double ratio = -1.0 );
206
207 QwtAbstractLegend* legend();
208 const QwtAbstractLegend* legend() const;
209
210 void updateLegend();
211 void updateLegend( const QwtPlotItem* );
212
213 // Misc
214
215 virtual QSize sizeHint() const QWT_OVERRIDE;
216 virtual QSize minimumSizeHint() const QWT_OVERRIDE;
217
218 virtual void updateLayout();
219 virtual void drawCanvas( QPainter* );
220
221 void updateAxes();
222 void updateCanvasMargins();
223
224 virtual void getCanvasMarginsHint(
225 const QwtScaleMap maps[], const QRectF& canvasRect,
226 double& left, double& top, double& right, double& bottom) const;
227
228 virtual bool event( QEvent* ) QWT_OVERRIDE;
229 virtual bool eventFilter( QObject*, QEvent* ) QWT_OVERRIDE;
230
231 virtual void drawItems( QPainter*, const QRectF&,
232 const QwtScaleMap maps[ QwtAxis::AxisPositions ] ) const;
233
234 virtual QVariant itemToInfo( QwtPlotItem* ) const;
235 virtual QwtPlotItem* infoToItem( const QVariant& ) const;
236
237#if QWT_AXIS_COMPAT
238 enum Axis
239 {
240 yLeft = QwtAxis::YLeft,
241 yRight = QwtAxis::YRight,
242 xBottom = QwtAxis::XBottom,
243 xTop = QwtAxis::XTop,
244
245 axisCnt = QwtAxis::AxisPositions
246 };
247
248 void enableAxis( int axisId, bool on = true )
249 {
250 setAxisVisible( axisId, on );
251 }
252
253 bool axisEnabled( int axisId ) const
254 {
255 return isAxisVisible( axisId );
256 }
257#endif
258
259 Q_SIGNALS:
266 void itemAttached( QwtPlotItem* plotItem, bool on );
267
278 void legendDataChanged( const QVariant& itemInfo,
279 const QList< QwtLegendData >& data );
280
281 public Q_SLOTS:
282 virtual void replot();
283 void autoRefresh();
284
285 protected:
286
287 virtual void resizeEvent( QResizeEvent* ) QWT_OVERRIDE;
288
289 private Q_SLOTS:
290 void updateLegendItems( const QVariant& itemInfo,
291 const QList< QwtLegendData >& legendData );
292
293 private:
294 friend class QwtPlotItem;
295 void attachItem( QwtPlotItem*, bool );
296
297 void initAxesData();
298 void deleteAxesData();
299 void updateScaleDiv();
300
301 void initPlot( const QwtText& title );
302
303 class ScaleData;
304 ScaleData* m_scaleData;
305
306 class PrivateData;
307 PrivateData* m_data;
308};
309
310#endif
QList
Definition qwt_abstract_legend.h:17
QwtAbstractLegend
Abstract base class for legend widgets.
Definition qwt_abstract_legend.h:35
QwtInterval
A class representing an interval.
Definition qwt_interval.h:23
QwtPlotDict
A dictionary for plot items.
Definition qwt_plot_dict.h:33
QwtPlot
A 2-D plotting widget.
Definition qwt_plot.h:79
QwtPlot::itemAttached
void itemAttached(QwtPlotItem *plotItem, bool on)
QwtPlot::LegendPosition
LegendPosition
Definition qwt_plot.h:94
QwtPlot::LeftLegend
@ LeftLegend
The legend will be left from the QwtAxis::YLeft axis.
Definition qwt_plot.h:96
QwtPlot::RightLegend
@ RightLegend
The legend will be right from the QwtAxis::YRight axis.
Definition qwt_plot.h:99
QwtPlot::BottomLegend
@ BottomLegend
The legend will be below the footer.
Definition qwt_plot.h:102
QwtPlot::legendDataChanged
void legendDataChanged(const QVariant &itemInfo, const QList< QwtLegendData > &data)
QwtPlotItem
Base class for items on the plot canvas.
Definition qwt_plot_item.h:67
QwtPlotLayout
Layout engine for QwtPlot.
Definition qwt_plot_layout.h:28
QwtScaleDiv
A class representing a scale division.
Definition qwt_scale_div.h:34
QwtScaleDraw
A class for drawing scales.
Definition qwt_scale_draw.h:36
QwtScaleEngine
Base class for scale engines.
Definition qwt_scale_engine.h:46
QwtScaleMap
A scale map.
Definition qwt_scale_map.h:27
QwtScaleWidget
A Widget which contains a scale.
Definition qwt_scale_widget.h:35
QwtText
A class representing a text.
Definition qwt_text.h:52
QwtTextLabel
A Widget which displays a QwtText.
Definition qwt_text_label.h:27
QwtAxis
Definition qwt_axis.h:19
QwtAxis::YRight
@ YRight
Y axis right of the canvas.
Definition qwt_axis.h:27
QwtAxis::XTop
@ XTop
X axis above the canvas.
Definition qwt_axis.h:33
QwtAxis::XBottom
@ XBottom
X axis below the canvas.
Definition qwt_axis.h:30
QwtAxis::YLeft
@ YLeft
Y axis left of the canvas.
Definition qwt_axis.h:24