Qwt User's Guide 6.3.0

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qwt_dial.cpp
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#include "qwt_dial.h"
11#include "qwt_dial_needle.h"
12#include "qwt_math.h"
13#include "qwt_scale_map.h"
14#include "qwt_round_scale_draw.h"
15#include "qwt_painter.h"
16#include "qwt.h"
17
18#include <qpainter.h>
19#include <qpalette.h>
20#include <qpixmap.h>
21#include <qevent.h>
22#include <qstyle.h>
23#include <qstyleoption.h>
24
25 static inline double qwtAngleDist( double a1, double a2 )
26{
27 double dist = qAbs( a2 - a1 );
28 if ( dist > 360.0 )
29 dist -= 360.0;
30
31 return dist;
32}
33
34 static inline bool qwtIsOnArc( double angle, double min, double max )
35{
36 if ( min < max )
37 {
38 return ( angle >= min ) && ( angle <= max );
39 }
40 else
41 {
42 return ( angle >= min ) || ( angle <= max );
43 }
44}
45
46 static inline double qwtBoundedAngle( double min, double angle, double max )
47{
48 double from = qwtNormalizeDegrees( min );
49 double to = qwtNormalizeDegrees( max );
50
51 double a;
52
53 if ( qwtIsOnArc( angle, from, to ) )
54 {
55 a = angle;
56 if ( a < min )
57 a += 360.0;
58 }
59 else
60 {
61 if ( qwtAngleDist( angle, from ) <
62 qwtAngleDist( angle, to ) )
63 {
64 a = min;
65 }
66 else
67 {
68 a = max;
69 }
70 }
71
72 return a;
73}
74
75 class QwtDial::PrivateData
76{
77 public:
78 PrivateData()
79 : frameShadow( Sunken )
80 , lineWidth( 0 )
81 , mode( RotateNeedle )
82 , origin( 90.0 )
83 , minScaleArc( 0.0 )
84 , maxScaleArc( 0.0 )
85 , needle( NULL )
86 , arcOffset( 0.0 )
87 , mouseOffset( 0.0 )
88 {
89 }
90
91 ~PrivateData()
92 {
93 delete needle;
94 }
95 Shadow frameShadow;
96 int lineWidth;
97
98 QwtDial::Mode mode;
99
100 double origin;
101 double minScaleArc;
102 double maxScaleArc;
103
104 QwtDialNeedle* needle;
105
106 double arcOffset;
107 double mouseOffset;
108
109 QPixmap pixmapCache;
110};
111
124 QwtDial::QwtDial( QWidget* parent )
125 : QwtAbstractSlider( parent )
126{
127 m_data = new PrivateData;
128
129 setFocusPolicy( Qt::TabFocus );
130
131 QPalette p = palette();
132 for ( int i = 0; i < QPalette::NColorGroups; i++ )
133 {
134 const QPalette::ColorGroup colorGroup =
135 static_cast< QPalette::ColorGroup >( i );
136
137 // Base: background color of the circle inside the frame.
138 // WindowText: background color of the circle inside the scale
139
140 p.setColor( colorGroup, QPalette::WindowText,
141 p.color( colorGroup, QPalette::Base ) );
142 }
143 setPalette( p );
144
145 QwtRoundScaleDraw* scaleDraw = new QwtRoundScaleDraw();
146 scaleDraw->setRadius( 0 );
147
148 setScaleDraw( scaleDraw );
149
150 setScaleArc( 0.0, 360.0 ); // scale as a full circle
151
152 setScaleMaxMajor( 10 );
153 setScaleMaxMinor( 5 );
154
155 setValue( 0.0 );
156}
157
159 QwtDial::~QwtDial()
160{
161 delete m_data;
162}
163
170 void QwtDial::setFrameShadow( Shadow shadow )
171{
172 if ( shadow != m_data->frameShadow )
173 {
174 invalidateCache();
175
176 m_data->frameShadow = shadow;
177 if ( lineWidth() > 0 )
178 update();
179 }
180}
181
186 QwtDial::Shadow QwtDial::frameShadow() const
187{
188 return m_data->frameShadow;
189}
190
197 void QwtDial::setLineWidth( int lineWidth )
198{
199 if ( lineWidth < 0 )
200 lineWidth = 0;
201
202 if ( m_data->lineWidth != lineWidth )
203 {
204 invalidateCache();
205
206 m_data->lineWidth = lineWidth;
207 update();
208 }
209}
210
215 int QwtDial::lineWidth() const
216{
217 return m_data->lineWidth;
218}
219
224QRect QwtDial::innerRect() const
225{
226 const int lw = lineWidth();
227 return boundingRect().adjusted( lw, lw, -lw, -lw );
228}
229
234QRect QwtDial::boundingRect() const
235{
236 const QRect cr = contentsRect();
237
238 const int dim = qMin( cr.width(), cr.height() );
239
240 QRect inner( 0, 0, dim, dim );
241 inner.moveCenter( cr.center() );
242
243 return inner;
244}
245
250QRect QwtDial::scaleInnerRect() const
251{
252 QRect rect = innerRect();
253
254 const QwtAbstractScaleDraw* sd = scaleDraw();
255 if ( sd )
256 {
257 int scaleDist = qwtCeil( sd->extent( font() ) );
258 scaleDist++; // margin
259
260 rect.adjust( scaleDist, scaleDist, -scaleDist, -scaleDist );
261 }
262
263 return rect;
264}
265
278 void QwtDial::setMode( Mode mode )
279{
280 if ( mode != m_data->mode )
281 {
282 invalidateCache();
283
284 m_data->mode = mode;
285 sliderChange();
286 }
287}
288
293 QwtDial::Mode QwtDial::mode() const
294{
295 return m_data->mode;
296}
297
301 void QwtDial::invalidateCache()
302{
303 m_data->pixmapCache = QPixmap();
304}
305
310 void QwtDial::paintEvent( QPaintEvent* event )
311{
312 QPainter painter( this );
313 painter.setClipRegion( event->region() );
314
315 QStyleOption opt;
316 opt.initFrom(this);
317 style()->drawPrimitive(QStyle::PE_Widget, &opt, &painter, this);
318
319 if ( m_data->mode == QwtDial::RotateScale )
320 {
321 painter.save();
322 painter.setRenderHint( QPainter::Antialiasing, true );
323
324 drawContents( &painter );
325
326 painter.restore();
327 }
328
329 const QRect r = contentsRect();
330 if ( r.size() != m_data->pixmapCache.size() )
331 {
332 m_data->pixmapCache = QwtPainter::backingStore( this, r.size() );
333 m_data->pixmapCache.fill( Qt::transparent );
334
335 QPainter p( &m_data->pixmapCache );
336 p.setRenderHint( QPainter::Antialiasing, true );
337 p.translate( -r.topLeft() );
338
339 if ( m_data->mode != QwtDial::RotateScale )
340 drawContents( &p );
341
342 if ( lineWidth() > 0 )
343 drawFrame( &p );
344
345 if ( m_data->mode != QwtDial::RotateNeedle )
346 drawNeedle( &p );
347 }
348
349 painter.drawPixmap( r.topLeft(), m_data->pixmapCache );
350
351 if ( m_data->mode == QwtDial::RotateNeedle )
352 drawNeedle( &painter );
353
354 if ( hasFocus() )
355 drawFocusIndicator( &painter );
356}
357
362 void QwtDial::drawFocusIndicator( QPainter* painter ) const
363{
364 QwtPainter::drawFocusRect( painter, this, boundingRect() );
365}
366
373 void QwtDial::drawFrame( QPainter* painter )
374{
375 QwtPainter::drawRoundFrame( painter, boundingRect(),
376 palette(), lineWidth(), m_data->frameShadow );
377}
378
391 void QwtDial::drawContents( QPainter* painter ) const
392{
393 if ( testAttribute( Qt::WA_NoSystemBackground ) ||
394 palette().brush( QPalette::Base ) !=
395 palette().brush( QPalette::Window ) )
396 {
397 const QRectF br = boundingRect();
398
399 painter->save();
400 painter->setPen( Qt::NoPen );
401 painter->setBrush( palette().brush( QPalette::Base ) );
402 painter->drawEllipse( br );
403 painter->restore();
404 }
405
406 const QRectF insideScaleRect = scaleInnerRect();
407 if ( palette().brush( QPalette::WindowText ) !=
408 palette().brush( QPalette::Base ) )
409 {
410 painter->save();
411 painter->setPen( Qt::NoPen );
412 painter->setBrush( palette().brush( QPalette::WindowText ) );
413 painter->drawEllipse( insideScaleRect );
414 painter->restore();
415 }
416
417 const QPointF center = insideScaleRect.center();
418 const double radius = 0.5 * insideScaleRect.width();
419
420 painter->save();
421 drawScale( painter, center, radius );
422 painter->restore();
423
424 painter->save();
425 drawScaleContents( painter, center, radius );
426 painter->restore();
427}
428
438 void QwtDial::drawNeedle( QPainter* painter, const QPointF& center,
439 double radius, double direction, QPalette::ColorGroup colorGroup ) const
440{
441 if ( m_data->needle )
442 {
443 direction = 360.0 - direction; // counter clockwise
444 m_data->needle->draw( painter, center, radius, direction, colorGroup );
445 }
446}
447
448 void QwtDial::drawNeedle( QPainter* painter ) const
449{
450 if ( !isValid() )
451 return;
452
453 QPalette::ColorGroup colorGroup;
454 if ( isEnabled() )
455 colorGroup = hasFocus() ? QPalette::Active : QPalette::Inactive;
456 else
457 colorGroup = QPalette::Disabled;
458
459 const QRectF sr = scaleInnerRect();
460
461 painter->save();
462 painter->setRenderHint( QPainter::Antialiasing, true );
463 drawNeedle( painter, sr.center(), 0.5 * sr.width(),
464 scaleMap().transform( value() ) + 270.0, colorGroup );
465 painter->restore();
466}
467
475 void QwtDial::drawScale( QPainter* painter,
476 const QPointF& center, double radius ) const
477{
478 QwtRoundScaleDraw* sd = const_cast< QwtRoundScaleDraw* >( scaleDraw() );
479 if ( sd == NULL )
480 return;
481
482 sd->setRadius( radius );
483 sd->moveCenter( center );
484
485 QPalette pal = palette();
486
487 const QColor textColor = pal.color( QPalette::Text );
488 pal.setColor( QPalette::WindowText, textColor ); // ticks, backbone
489
490 painter->setFont( font() );
491 painter->setPen( QPen( textColor, sd->penWidthF() ) );
492
493 painter->setBrush( Qt::red );
494 sd->draw( painter, pal );
495}
496
506 void QwtDial::drawScaleContents( QPainter* painter,
507 const QPointF& center, double radius ) const
508{
509 Q_UNUSED(painter);
510 Q_UNUSED(center);
511 Q_UNUSED(radius);
512}
513
522 void QwtDial::setNeedle( QwtDialNeedle* needle )
523{
524 if ( needle != m_data->needle )
525 {
526 if ( m_data->needle )
527 delete m_data->needle;
528
529 m_data->needle = needle;
530 update();
531 }
532}
533
538 const QwtDialNeedle* QwtDial::needle() const
539{
540 return m_data->needle;
541}
542
547 QwtDialNeedle* QwtDial::needle()
548{
549 return m_data->needle;
550}
551
553 QwtRoundScaleDraw* QwtDial::scaleDraw()
554{
555 return static_cast< QwtRoundScaleDraw* >( abstractScaleDraw() );
556}
557
559 const QwtRoundScaleDraw* QwtDial::scaleDraw() const
560{
561 return static_cast< const QwtRoundScaleDraw* >( abstractScaleDraw() );
562}
563
574 void QwtDial::setScaleDraw( QwtRoundScaleDraw* scaleDraw )
575{
576 setAbstractScaleDraw( scaleDraw );
577 sliderChange();
578}
579
588 void QwtDial::setScaleArc( double minArc, double maxArc )
589{
590 if ( minArc != 360.0 && minArc != -360.0 )
591 minArc = std::fmod( minArc, 360.0 );
592 if ( maxArc != 360.0 && maxArc != -360.0 )
593 maxArc = std::fmod( maxArc, 360.0 );
594
595 double minScaleArc = qwtMinF( minArc, maxArc );
596 double maxScaleArc = qwtMaxF( minArc, maxArc );
597
598 if ( maxScaleArc - minScaleArc > 360.0 )
599 maxScaleArc = minScaleArc + 360.0;
600
601 if ( ( minScaleArc != m_data->minScaleArc ) ||
602 ( maxScaleArc != m_data->maxScaleArc ) )
603 {
604 m_data->minScaleArc = minScaleArc;
605 m_data->maxScaleArc = maxScaleArc;
606
607 invalidateCache();
608 sliderChange();
609 }
610}
611
618 void QwtDial::setMinScaleArc( double min )
619{
620 setScaleArc( min, m_data->maxScaleArc );
621}
622
627 double QwtDial::minScaleArc() const
628{
629 return m_data->minScaleArc;
630}
631
638 void QwtDial::setMaxScaleArc( double max )
639{
640 setScaleArc( m_data->minScaleArc, max );
641}
642
647 double QwtDial::maxScaleArc() const
648{
649 return m_data->maxScaleArc;
650}
651
660 void QwtDial::setOrigin( double origin )
661{
662 invalidateCache();
663
664 m_data->origin = origin;
665 sliderChange();
666}
667
674 double QwtDial::origin() const
675{
676 return m_data->origin;
677}
678
683QSize QwtDial::sizeHint() const
684{
685 int sh = 0;
686 if ( scaleDraw() )
687 sh = qwtCeil( scaleDraw()->extent( font() ) );
688
689 const int d = 6 * sh + 2 * lineWidth();
690
691 QSize hint( d, d );
692 if ( !isReadOnly() )
693 hint = qwtExpandedToGlobalStrut( hint );
694
695 return hint;
696}
697
702QSize QwtDial::minimumSizeHint() const
703{
704 int sh = 0;
705 if ( scaleDraw() )
706 sh = qwtCeil( scaleDraw()->extent( font() ) );
707
708 const int d = 3 * sh + 2 * lineWidth();
709
710 return QSize( d, d );
711}
712
721 bool QwtDial::isScrollPosition( const QPoint& pos ) const
722{
723 const QRegion region( innerRect(), QRegion::Ellipse );
724 if ( region.contains( pos ) && ( pos != innerRect().center() ) )
725 {
726 double angle = QLineF( rect().center(), pos ).angle();
727 if ( m_data->mode == QwtDial::RotateScale )
728 angle = 360.0 - angle;
729
730 double valueAngle =
731 qwtNormalizeDegrees( 90.0 - scaleMap().transform( value() ) );
732
733 m_data->mouseOffset = qwtNormalizeDegrees( angle - valueAngle );
734 m_data->arcOffset = scaleMap().p1();
735
736 return true;
737 }
738
739 return false;
740}
741
751 double QwtDial::scrolledTo( const QPoint& pos ) const
752{
753 double angle = QLineF( rect().center(), pos ).angle();
754 if ( m_data->mode == QwtDial::RotateScale )
755 {
756 angle += scaleMap().p1() - m_data->arcOffset;
757 angle = 360.0 - angle;
758 }
759
760 angle = qwtNormalizeDegrees( angle - m_data->mouseOffset );
761 angle = qwtNormalizeDegrees( 90.0 - angle );
762
763 if ( scaleMap().pDist() >= 360.0 )
764 {
765 if ( angle < scaleMap().p1() )
766 angle += 360.0;
767
768 if ( !wrapping() )
769 {
770 double boundedAngle = angle;
771
772 const double arc = angle - scaleMap().transform( value() );
773 if ( qAbs( arc ) > 180.0 )
774 {
775 boundedAngle = ( arc > 0 )
776 ? scaleMap().p1() : scaleMap().p2();
777 }
778
779 m_data->mouseOffset += ( boundedAngle - angle );
780
781 angle = boundedAngle;
782 }
783 }
784 else
785 {
786 const double boundedAngle =
787 qwtBoundedAngle( scaleMap().p1(), angle, scaleMap().p2() );
788
789 if ( !wrapping() )
790 m_data->mouseOffset += ( boundedAngle - angle );
791
792 angle = boundedAngle;
793 }
794
795 return scaleMap().invTransform( angle );
796}
797
804 void QwtDial::changeEvent( QEvent* event )
805{
806 switch( event->type() )
807 {
808 case QEvent::EnabledChange:
809 case QEvent::FontChange:
810 case QEvent::StyleChange:
811 case QEvent::PaletteChange:
812 case QEvent::LanguageChange:
813 case QEvent::LocaleChange:
814 {
815 invalidateCache();
816 break;
817 }
818 default:
819 break;
820 }
821
822 QwtAbstractSlider::changeEvent( event );
823}
824
829 void QwtDial::wheelEvent( QWheelEvent* event )
830{
831#if QT_VERSION < 0x050e00
832 const QPoint wheelPos = event->pos();
833#else
834 const QPoint wheelPos = event->position().toPoint();
835#endif
836
837 const QRegion region( innerRect(), QRegion::Ellipse );
838 if ( region.contains( wheelPos ) )
839 QwtAbstractSlider::wheelEvent( event );
840}
841
842 void QwtDial::setAngleRange( double angle, double span )
843{
844 if ( QwtRoundScaleDraw* sd = scaleDraw() )
845 {
846 angle = qwtNormalizeDegrees( angle - 270.0 );
847 sd->setAngleRange( angle, angle + span );
848 }
849}
850
855 void QwtDial::scaleChange()
856{
857 invalidateCache();
858 QwtAbstractSlider::scaleChange();
859}
860
861 void QwtDial::sliderChange()
862{
863 setAngleRange( m_data->origin + m_data->minScaleArc,
864 m_data->maxScaleArc - m_data->minScaleArc );
865
866 if ( mode() == RotateScale )
867 {
868 const double arc = scaleMap().transform( value() ) - scaleMap().p1();
869 setAngleRange( m_data->origin - arc,
870 m_data->maxScaleArc - m_data->minScaleArc );
871 }
872
873 QwtAbstractSlider::sliderChange();
874}
875
876#include "moc_qwt_dial.cpp"
QwtAbstractScaleDraw
A abstract base class for drawing scales.
Definition qwt_abstract_scale_draw.h:32
QwtAbstractScaleDraw::extent
virtual double extent(const QFont &font) const =0
QwtAbstractScaleDraw::draw
virtual void draw(QPainter *, const QPalette &) const
Draw the scale.
Definition qwt_abstract_scale_draw.cpp:169
QwtAbstractScaleDraw::penWidthF
qreal penWidthF() const
Definition qwt_abstract_scale_draw.cpp:156
QwtAbstractScale::scaleMap
const QwtScaleMap & scaleMap() const
Definition qwt_abstract_scale.cpp:357
QwtAbstractScale::setScaleMaxMajor
void setScaleMaxMajor(int ticks)
Set the maximum number of major tick intervals.
Definition qwt_abstract_scale.cpp:189
QwtAbstractScale::abstractScaleDraw
const QwtAbstractScaleDraw * abstractScaleDraw() const
Definition qwt_abstract_scale.cpp:302
QwtAbstractScale::setScaleMaxMinor
void setScaleMaxMinor(int ticks)
Set the maximum number of minor tick intervals.
Definition qwt_abstract_scale.cpp:219
QwtAbstractScale::transform
int transform(double) const
Definition qwt_abstract_scale.cpp:369
QwtAbstractScale::setAbstractScaleDraw
void setAbstractScaleDraw(QwtAbstractScaleDraw *)
Set a scale draw.
Definition qwt_abstract_scale.cpp:277
QwtAbstractScale::changeEvent
virtual void changeEvent(QEvent *) override
Definition qwt_abstract_scale.cpp:453
QwtAbstractSlider
An abstract base class for slider widgets with a scale.
Definition qwt_abstract_slider.h:33
QwtAbstractSlider::scaleChange
virtual void scaleChange() override
Definition qwt_abstract_slider.cpp:811
QwtAbstractSlider::sliderChange
virtual void sliderChange()
Calling update()
Definition qwt_abstract_slider.cpp:829
QwtAbstractSlider::setValue
void setValue(double value)
Definition qwt_abstract_slider.cpp:570
QwtAbstractSlider::wrapping
bool wrapping() const
Definition qwt_abstract_slider.cpp:608
QwtAbstractSlider::isReadOnly
bool isReadOnly() const
Definition qwt_abstract_slider.cpp:159
QwtAbstractSlider::isValid
bool isValid() const
Definition qwt_abstract_slider.cpp:125
QwtAbstractSlider::wheelEvent
virtual void wheelEvent(QWheelEvent *) override
Definition qwt_abstract_slider.cpp:296
QwtAbstractSlider::value
double value() const
Returns the current value.
Definition qwt_abstract_slider.cpp:587
QwtDial::setMinScaleArc
void setMinScaleArc(double)
Definition qwt_dial.cpp:618
QwtDial::drawFrame
virtual void drawFrame(QPainter *)
Definition qwt_dial.cpp:373
QwtDial::minScaleArc
double minScaleArc() const
Definition qwt_dial.cpp:627
QwtDial::~QwtDial
virtual ~QwtDial()
Destructor.
Definition qwt_dial.cpp:159
QwtDial::maxScaleArc
double maxScaleArc() const
Definition qwt_dial.cpp:647
QwtDial::setFrameShadow
void setFrameShadow(Shadow)
Definition qwt_dial.cpp:170
QwtDial::wheelEvent
virtual void wheelEvent(QWheelEvent *) override
Definition qwt_dial.cpp:829
QwtDial::sizeHint
virtual QSize sizeHint() const override
Definition qwt_dial.cpp:683
QwtDial::setScaleDraw
void setScaleDraw(QwtRoundScaleDraw *)
Definition qwt_dial.cpp:574
QwtDial::scaleInnerRect
virtual QRect scaleInnerRect() const
Definition qwt_dial.cpp:250
QwtDial::setOrigin
virtual void setOrigin(double)
Change the origin.
Definition qwt_dial.cpp:660
QwtDial::changeEvent
virtual void changeEvent(QEvent *) override
Definition qwt_dial.cpp:804
QwtDial::scaleChange
virtual void scaleChange() override
Definition qwt_dial.cpp:855
QwtDial::origin
double origin() const
Definition qwt_dial.cpp:674
QwtDial::boundingRect
QRect boundingRect() const
Definition qwt_dial.cpp:234
QwtDial::drawScale
virtual void drawScale(QPainter *, const QPointF &center, double radius) const
Definition qwt_dial.cpp:475
QwtDial::needle
const QwtDialNeedle * needle() const
Definition qwt_dial.cpp:538
QwtDial::setMode
void setMode(Mode)
Change the mode of the dial.
Definition qwt_dial.cpp:278
QwtDial::Mode
Mode
Mode controlling whether the needle or the scale is rotating.
Definition qwt_dial.h:87
QwtDial::RotateScale
@ RotateScale
The needle is fixed, the scales are rotating.
Definition qwt_dial.h:92
QwtDial::RotateNeedle
@ RotateNeedle
The needle is rotating.
Definition qwt_dial.h:89
QwtDial::Shadow
Shadow
Frame shadow.
Definition qwt_dial.h:74
QwtDial::Sunken
@ Sunken
QFrame::Sunken.
Definition qwt_dial.h:82
QwtDial::setLineWidth
void setLineWidth(int)
Definition qwt_dial.cpp:197
QwtDial::isScrollPosition
virtual bool isScrollPosition(const QPoint &) const override
Determine what to do when the user presses a mouse button.
Definition qwt_dial.cpp:721
QwtDial::mode
Mode mode() const
Definition qwt_dial.cpp:293
QwtDial::scrolledTo
virtual double scrolledTo(const QPoint &) const override
Determine the value for a new position of the slider handle.
Definition qwt_dial.cpp:751
QwtDial::invalidateCache
void invalidateCache()
Definition qwt_dial.cpp:301
QwtDial::lineWidth
int lineWidth() const
Definition qwt_dial.cpp:215
QwtDial::QwtDial
QwtDial(QWidget *parent=NULL)
Constructor.
Definition qwt_dial.cpp:124
QwtDial::drawFocusIndicator
virtual void drawFocusIndicator(QPainter *) const
Definition qwt_dial.cpp:362
QwtDial::sliderChange
virtual void sliderChange() override
Calling update()
Definition qwt_dial.cpp:861
QwtDial::minimumSizeHint
virtual QSize minimumSizeHint() const override
Definition qwt_dial.cpp:702
QwtDial::frameShadow
Shadow frameShadow() const
Definition qwt_dial.cpp:186
QwtDial::paintEvent
virtual void paintEvent(QPaintEvent *) override
Definition qwt_dial.cpp:310
QwtDial::setNeedle
void setNeedle(QwtDialNeedle *)
Definition qwt_dial.cpp:522
QwtDial::drawNeedle
virtual void drawNeedle(QPainter *, const QPointF &, double radius, double direction, QPalette::ColorGroup) const
Definition qwt_dial.cpp:438
QwtDial::setScaleArc
void setScaleArc(double minArc, double maxArc)
Definition qwt_dial.cpp:588
QwtDial::scaleDraw
QwtRoundScaleDraw * scaleDraw()
Definition qwt_dial.cpp:553
QwtDial::drawScaleContents
virtual void drawScaleContents(QPainter *painter, const QPointF &center, double radius) const
Definition qwt_dial.cpp:506
QwtDial::innerRect
QRect innerRect() const
Definition qwt_dial.cpp:224
QwtDial::drawContents
virtual void drawContents(QPainter *) const
Draw the contents inside the frame.
Definition qwt_dial.cpp:391
QwtDial::setMaxScaleArc
void setMaxScaleArc(double)
Definition qwt_dial.cpp:638
QwtDialNeedle
Base class for needles that can be used in a QwtDial.
Definition qwt_dial_needle.h:28
QwtDialNeedle::draw
virtual void draw(QPainter *, const QPointF &center, double length, double direction, QPalette::ColorGroup=QPalette::Active) const
Definition qwt_dial_needle.cpp:219
QwtPainter::drawRoundFrame
static void drawRoundFrame(QPainter *, const QRectF &, const QPalette &, int lineWidth, int frameStyle)
Definition qwt_painter.cpp:835
QwtPainter::drawFocusRect
static void drawFocusRect(QPainter *, const QWidget *)
Draw a focus rectangle on a widget using its style.
Definition qwt_painter.cpp:805
QwtPainter::backingStore
static QPixmap backingStore(QWidget *, const QSize &)
Definition qwt_painter.cpp:1515
QwtRoundScaleDraw
A class for drawing round scales.
Definition qwt_round_scale_draw.h:32
QwtRoundScaleDraw::setRadius
void setRadius(double radius)
Definition qwt_round_scale_draw.cpp:66
QwtRoundScaleDraw::moveCenter
void moveCenter(double x, double y)
Move the center of the scale draw, leaving the radius unchanged.
Definition qwt_round_scale_draw.h:64
QwtScaleMap::p1
double p1() const
Definition qwt_scale_map.h:99
QwtScaleMap::transform
double transform(double s) const
Definition qwt_scale_map.h:137
QwtScaleMap::invTransform
double invTransform(double p) const
Definition qwt_scale_map.h:154
QwtScaleMap::p2
double p2() const
Definition qwt_scale_map.h:107