1 | // Copyright (C) 2024 The Qt Company Ltd. |
---|---|
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only |
3 | |
4 | #include <QtQuick/private/qquicktext_p.h> |
5 | #include <QtQuickShapes/private/qquickshape_p.h> |
6 | #include <private/qpieslice_p.h> |
7 | |
8 | QT_BEGIN_NAMESPACE |
9 | |
10 | /*! |
11 | \class QPieSlice |
12 | \inmodule QtGraphs |
13 | \ingroup graphs_2D |
14 | \brief The QPieSlice class represents a single slice in a pie series. |
15 | |
16 | A pie slice has a value and a label. When the slice is added to a pie series, the |
17 | QPieSeries object calculates the percentage of the slice compared with the sum of |
18 | all slices in the series to determine the actual size of the slice in the graph. |
19 | |
20 | By default, the label is hidden. If it is visible, it can be either located outside |
21 | the slice and connected to it with an arm or centered inside the slice either |
22 | horizontally or in parallel with the tangential or normal of the slice's arc. |
23 | |
24 | By default, the visual appearance of the slice is set by a theme, but the theme can be |
25 | overridden by specifying slice properties. However, if the theme is changed after the |
26 | slices are customized, all customization will be lost. |
27 | |
28 | To enable user interaction with the pie graph, some basic signals are emitted when |
29 | users click pie slices or hover the mouse over them. |
30 | |
31 | \sa QPieSeries |
32 | */ |
33 | |
34 | /*! |
35 | \qmltype PieSlice |
36 | \nativetype QPieSlice |
37 | \inqmlmodule QtGraphs |
38 | \ingroup graphs_qml_2D |
39 | \brief Represents a single slice in a pie series. |
40 | |
41 | A pie slice has a value and a label. When the slice is added to a pie series, the |
42 | PieSeries type calculates the percentage of the slice compared with the sum of |
43 | all slices in the series to determine the actual size of the slice in the graph. |
44 | |
45 | By default, the label is hidden. If it is visible, it can be either located outside |
46 | the slice and connected to it with an arm or centered inside the slice either |
47 | horizontally or in parallel with the tangential or normal of the slice's arc. |
48 | |
49 | By default, the visual appearance of the slice is set by a theme, but the theme can be |
50 | overridden by specifying slice properties. However, if the theme is changed after the |
51 | slices are customized, all customization will be lost. |
52 | |
53 | The PieSlice type should be used as a child of a PieSeries type. For example: |
54 | |
55 | Alternatively, slices can be added to a pie series by using the \l {QtGraphs::PieSeries::append()} |
56 | {PieSeries.append()} method. |
57 | |
58 | In that case, \l {QtGraphs::PieSeries::at()}{PieSeries.at()} or \l {QtGraphs::PieSeries::find()} |
59 | {PieSeries.find()} can be used to access the properties of an individual PieSlice instance. |
60 | |
61 | \sa PieSeries |
62 | */ |
63 | |
64 | /*! |
65 | \enum QPieSlice::LabelPosition |
66 | |
67 | This enum describes the position of the slice label. |
68 | |
69 | \value Outside |
70 | The label is located outside the slice connected to it with an arm. |
71 | This is the default value. |
72 | \value InsideHorizontal |
73 | The label is centered within the slice and laid out horizontally. |
74 | \value InsideTangential |
75 | The label is centered within the slice and rotated to be parallel with |
76 | the tangential of the slice's arc. |
77 | \value InsideNormal |
78 | The label is centered within the slice and rotated to be parallel with |
79 | the normal of the slice's arc. |
80 | */ |
81 | |
82 | /*! |
83 | \property QPieSlice::label |
84 | \brief The label of the slice. |
85 | \note The string can be HTML formatted. |
86 | |
87 | \sa labelVisible, labelFont, labelArmLengthFactor |
88 | */ |
89 | /*! |
90 | \qmlproperty string PieSlice::label |
91 | The label of the slice. |
92 | \note The string can be HTML formatted. |
93 | */ |
94 | |
95 | /*! |
96 | \qmlsignal PieSlice::labelChanged() |
97 | This signal is emitted when the slice label changes. |
98 | \sa label |
99 | */ |
100 | |
101 | /*! |
102 | \property QPieSlice::value |
103 | \brief The value of the slice. |
104 | \note A negative value is converted to a positive value. |
105 | \sa percentage(), QPieSeries::sum() |
106 | */ |
107 | /*! |
108 | \qmlproperty real PieSlice::value |
109 | The value of the slice. |
110 | |
111 | \note A negative value is converted to a positive value. |
112 | */ |
113 | |
114 | /*! |
115 | \qmlsignal PieSlice::valueChanged() |
116 | This signal is emitted when the slice value changes. |
117 | \sa value |
118 | */ |
119 | |
120 | /*! |
121 | \property QPieSlice::labelVisible |
122 | \brief The visibility of the slice label. By default, the label is not visible. |
123 | \sa label, labelFont, labelArmLengthFactor |
124 | */ |
125 | /*! |
126 | \qmlproperty bool PieSlice::labelVisible |
127 | The visibility of the slice label. By default, the label is not visible. |
128 | */ |
129 | |
130 | /*! |
131 | \qmlsignal PieSlice::labelVisibleChanged() |
132 | This signal is emitted when the visibility of the slice label changes. |
133 | \sa labelVisible |
134 | */ |
135 | |
136 | /*! |
137 | \property QPieSlice::labelColor |
138 | \brief The color used to draw the slice label. |
139 | */ |
140 | /*! |
141 | \qmlproperty color PieSlice::labelColor |
142 | The color used to draw the slice label. |
143 | */ |
144 | |
145 | /*! |
146 | \qmlsignal PieSlice::labelColorChanged() |
147 | This signal is emitted when the slice label color changes. |
148 | \sa labelColor |
149 | */ |
150 | |
151 | /*! |
152 | \property QPieSlice::labelFont |
153 | \brief The font used for drawing the label text. |
154 | \sa label, labelVisible, labelArmLengthFactor |
155 | */ |
156 | |
157 | /*! |
158 | \qmlsignal PieSlice::labelFontChanged() |
159 | This signal is emitted when the label font of the slice changes. |
160 | \sa labelFont |
161 | */ |
162 | |
163 | /*! |
164 | \qmlproperty font PieSlice::labelFont |
165 | |
166 | The font used for the slice label. |
167 | |
168 | For more information, see \l [QML]{font}. |
169 | |
170 | \sa labelVisible, labelPosition |
171 | */ |
172 | /*! |
173 | \qmlsignal PieSlice::labelFontChanged() |
174 | This signal is emitted when the label font changes. |
175 | \sa labelFont |
176 | */ |
177 | |
178 | /*! |
179 | \property QPieSlice::labelPosition |
180 | \brief The position of the slice label. |
181 | \sa label, labelVisible |
182 | */ |
183 | /*! |
184 | \qmlproperty enumeration PieSlice::labelPosition |
185 | |
186 | Describes the position of the slice label. |
187 | |
188 | \value PieSlice.LabelPosition.Outside |
189 | The label is located outside the slice connected to it with an arm. |
190 | This is the default value. |
191 | \value PieSlice.LabelPosition.InsideHorizontal |
192 | The label is centered within the slice and laid out horizontally. |
193 | \value PieSlice.LabelPosition.InsideTangential |
194 | The label is centered within the slice and rotated to be parallel with |
195 | the tangential of the slice's arc. |
196 | \value PieSlice.LabelPosition.InsideNormal |
197 | The label is centered within the slice and rotated to be parallel with |
198 | the normal of the slice's arc. |
199 | |
200 | \sa labelVisible |
201 | */ |
202 | /*! |
203 | \qmlsignal PieSlice::labelPositionChanged() |
204 | This signal is emitted when the label position changes. |
205 | \sa labelPosition |
206 | */ |
207 | |
208 | /*! |
209 | \property QPieSlice::labelArmLengthFactor |
210 | \brief The length of the label arm. |
211 | The factor is relative to the pie radius. For example: |
212 | \list |
213 | \li 1.0 means that the length is the same as the radius. |
214 | \li 0.5 means that the length is half of the radius. |
215 | \endlist |
216 | By default, the arm length is 0.15 |
217 | \sa label, labelVisible, labelFont |
218 | */ |
219 | /*! |
220 | \qmlproperty real PieSlice::labelArmLengthFactor |
221 | The length of the label arm. |
222 | The factor is relative to the pie radius. For example: |
223 | \list |
224 | \li 1.0 means that the length is the same as the radius. |
225 | \li 0.5 means that the length is half of the radius. |
226 | \endlist |
227 | By default, the arm length is 0.15 |
228 | |
229 | \sa labelVisible |
230 | */ |
231 | /*! |
232 | \qmlsignal PieSlice::labelArmLengthFactorChanged() |
233 | This signal is emitted when the label arm length factor changes. |
234 | \sa labelArmLengthFactor |
235 | */ |
236 | |
237 | /*! |
238 | \property QPieSlice::color |
239 | \brief The fill color of the slice. |
240 | This is a convenience property for modifying the slice fill color. |
241 | */ |
242 | /*! |
243 | \qmlproperty color PieSlice::color |
244 | The fill color of the slice. |
245 | */ |
246 | |
247 | /*! |
248 | \qmlsignal PieSlice::colorChanged() |
249 | This signal is emitted when the slice color changes. |
250 | */ |
251 | |
252 | /*! |
253 | \property QPieSlice::borderColor |
254 | \brief The color used to draw the slice border. |
255 | This is a convenience property for modifying the slice. |
256 | \sa borderWidth |
257 | */ |
258 | /*! |
259 | \qmlproperty color PieSlice::borderColor |
260 | The color used to draw the slice border. |
261 | \sa borderWidth |
262 | */ |
263 | |
264 | /*! |
265 | \qmlsignal PieSlice::borderColorChanged() |
266 | This signal is emitted when the slice border color changes. |
267 | \sa borderColor |
268 | */ |
269 | |
270 | /*! |
271 | \property QPieSlice::borderWidth |
272 | \brief The width of the slice border. |
273 | This is a convenience property for modifying the slice border width. |
274 | \sa borderColor |
275 | */ |
276 | /*! |
277 | \qmlproperty qreal PieSlice::borderWidth |
278 | The width of the slice border. |
279 | This is a convenience property for modifying the slice border width. |
280 | \sa borderColor |
281 | */ |
282 | |
283 | /*! |
284 | \qmlsignal PieSlice::borderWidthChanged() |
285 | This signal is emitted when the slice border width changes. |
286 | \sa borderWidth |
287 | */ |
288 | |
289 | /*! |
290 | \property QPieSlice::exploded |
291 | \brief Whether the slice is separated from the pie. |
292 | \sa explodeDistanceFactor |
293 | */ |
294 | /*! |
295 | \qmlproperty bool PieSlice::exploded |
296 | Whether the slice is separated from the pie. |
297 | \sa explodeDistanceFactor |
298 | */ |
299 | /*! |
300 | \qmlsignal PieSlice::explodedChanged() |
301 | This signal is emitted when the exploded property changes. |
302 | \sa exploded |
303 | */ |
304 | |
305 | /*! |
306 | \property QPieSlice::explodeDistanceFactor |
307 | \brief Determines how far away from the pie the slice is exploded. |
308 | \list |
309 | \li 1.0 means that the distance is the same as the radius. |
310 | \li 0.5 means that the distance is half of the radius. |
311 | \endlist |
312 | By default, the distance is 0.15 |
313 | \sa exploded |
314 | */ |
315 | /*! |
316 | \qmlproperty real PieSlice::explodeDistanceFactor |
317 | Determines how far away from the pie the slice is exploded. |
318 | \list |
319 | \li 1.0 means that the distance is the same as the radius. |
320 | \li 0.5 means that the distance is half of the radius. |
321 | \endlist |
322 | By default, the distance is 0.15 |
323 | |
324 | \sa exploded |
325 | */ |
326 | /*! |
327 | \qmlsignal PieSlice::explodeDistanceFactorChanged() |
328 | This signal is emitted when the explode distance factor changes. |
329 | \sa explodeDistanceFactor |
330 | */ |
331 | |
332 | /*! |
333 | \property QPieSlice::percentage |
334 | \brief The percentage of the slice compared to the sum of all slices in the series. |
335 | The actual value ranges from 0.0 to 1.0. |
336 | Updated automatically once the slice is added to the series. |
337 | \sa value, QPieSeries::sum |
338 | */ |
339 | /*! |
340 | \qmlproperty real PieSlice::percentage |
341 | The percentage of the slice compared to the sum of all slices in the series. |
342 | The actual value ranges from 0.0 to 1.0. |
343 | Updated automatically once the slice is added to the series. |
344 | */ |
345 | |
346 | /*! |
347 | \qmlsignal PieSlice::percentageChanged() |
348 | This signal is emitted when the percentage of the slice changes. |
349 | \sa percentage |
350 | */ |
351 | |
352 | /*! |
353 | \property QPieSlice::startAngle |
354 | \brief The starting angle of this slice in the series it belongs to. |
355 | A full pie is 360 degrees, where 0 degrees is at 12 a'clock. |
356 | Updated automatically once the slice is added to the series. |
357 | */ |
358 | /*! |
359 | \qmlproperty real PieSlice::startAngle |
360 | The starting angle of this slice in the series it belongs to. |
361 | A full pie is 360 degrees, where 0 degrees is at 12 a'clock. |
362 | Updated automatically once the slice is added to the series. |
363 | */ |
364 | |
365 | /*! |
366 | \qmlsignal PieSlice::startAngleChanged() |
367 | This signal is emitted when the starting angle of the slice changes. |
368 | \sa startAngle |
369 | */ |
370 | |
371 | /*! |
372 | \property QPieSlice::angleSpan |
373 | \brief The span of the slice in degrees. |
374 | A full pie is 360 degrees, where 0 degrees is at 12 a'clock. |
375 | Updated automatically once the slice is added to the series. |
376 | */ |
377 | /*! |
378 | \qmlproperty real PieSlice::angleSpan |
379 | The span of the slice in degrees. |
380 | A full pie is 360 degrees, where 0 degrees is at 12 a'clock. |
381 | Updated automatically once the slice is added to the series. |
382 | */ |
383 | |
384 | /*! |
385 | \qmlsignal PieSlice::angleSpanChanged() |
386 | This signal is emitted when the angle span of the slice changes. |
387 | \sa angleSpan |
388 | */ |
389 | |
390 | /*! |
391 | Constructs an empty slice with the parent \a parent. |
392 | \sa QPieSeries::append(), QPieSeries::insert() |
393 | */ |
394 | QPieSlice::QPieSlice(QObject *parent) |
395 | : QObject(*(new QPieSlicePrivate), parent) |
396 | {} |
397 | |
398 | /*! |
399 | Constructs an empty slice with the specified \a value, \a label, and \a parent. |
400 | \sa QPieSeries::append(), QPieSeries::insert() |
401 | */ |
402 | QPieSlice::QPieSlice(const QString &label, qreal value, QObject *parent) |
403 | : QObject(*(new QPieSlicePrivate), parent) |
404 | { |
405 | setLabel(label); |
406 | setValue(value); |
407 | } |
408 | |
409 | /*! |
410 | Removes the slice. The slice should not be removed if it has been added to a series. |
411 | */ |
412 | QPieSlice::~QPieSlice() {} |
413 | |
414 | /*! |
415 | Returns the series that this slice belongs to. |
416 | |
417 | \sa QPieSeries::append() |
418 | */ |
419 | QPieSeries *QPieSlice::series() const |
420 | { |
421 | Q_D(const QPieSlice); |
422 | return d->m_series; |
423 | } |
424 | |
425 | qreal QPieSlice::percentage() const |
426 | { |
427 | Q_D(const QPieSlice); |
428 | return d->m_percentage; |
429 | } |
430 | |
431 | qreal QPieSlice::startAngle() const |
432 | { |
433 | Q_D(const QPieSlice); |
434 | return d->m_startAngle; |
435 | } |
436 | |
437 | qreal QPieSlice::angleSpan() const |
438 | { |
439 | Q_D(const QPieSlice); |
440 | return d->m_angleSpan; |
441 | } |
442 | |
443 | void QPieSlice::setLabel(const QString &label) |
444 | { |
445 | Q_D(QPieSlice); |
446 | if (d->m_labelText == label) |
447 | return; |
448 | d->m_labelText = label; |
449 | d->m_labelItem->setText(label); |
450 | emit labelChanged(); |
451 | } |
452 | |
453 | QString QPieSlice::label() const |
454 | { |
455 | Q_D(const QPieSlice); |
456 | return d->m_labelText; |
457 | } |
458 | |
459 | void QPieSlice::setLabelVisible(bool visible) |
460 | { |
461 | Q_D(QPieSlice); |
462 | if (d->m_isLabelVisible == visible) |
463 | return; |
464 | |
465 | d->setLabelVisible(visible); |
466 | emit labelVisibleChanged(); |
467 | } |
468 | |
469 | bool QPieSlice::isLabelVisible() const |
470 | { |
471 | Q_D(const QPieSlice); |
472 | return d->m_isLabelVisible; |
473 | } |
474 | |
475 | void QPieSlice::setLabelPosition(LabelPosition position) |
476 | { |
477 | Q_D(QPieSlice); |
478 | if (d->m_labelPosition == position) |
479 | return; |
480 | |
481 | d->setLabelPosition(position); |
482 | emit labelPositionChanged(); |
483 | } |
484 | |
485 | QPieSlice::LabelPosition QPieSlice::labelPosition() |
486 | { |
487 | Q_D(QPieSlice); |
488 | return d->m_labelPosition; |
489 | } |
490 | |
491 | void QPieSlice::setLabelColor(QColor color) |
492 | { |
493 | Q_D(QPieSlice); |
494 | if (d->m_labelColor == color) |
495 | return; |
496 | |
497 | d->m_labelItem->setColor(color); |
498 | d->m_labelColor = color; |
499 | emit labelColorChanged(); |
500 | } |
501 | |
502 | QColor QPieSlice::labelColor() const |
503 | { |
504 | Q_D(const QPieSlice); |
505 | return d->m_labelColor; |
506 | } |
507 | |
508 | void QPieSlice::setLabelFont(const QFont &font) |
509 | { |
510 | Q_D(QPieSlice); |
511 | d->m_labelFont = font; |
512 | d->m_labelItem->setFont(font); |
513 | emit labelFontChanged(); |
514 | } |
515 | |
516 | QFont QPieSlice::labelFont() const |
517 | { |
518 | Q_D(const QPieSlice); |
519 | return d->m_labelFont; |
520 | } |
521 | |
522 | void QPieSlice::setLabelArmLengthFactor(qreal factor) |
523 | { |
524 | Q_D(QPieSlice); |
525 | |
526 | if (qFuzzyCompare(p1: d->m_labelArmLengthFactor, p2: factor)) |
527 | return; |
528 | |
529 | d->m_labelArmLengthFactor = factor; |
530 | emit labelArmLengthFactorChanged(); |
531 | } |
532 | |
533 | qreal QPieSlice::labelArmLengthFactor() const |
534 | { |
535 | Q_D(const QPieSlice); |
536 | return d->m_labelArmLengthFactor; |
537 | } |
538 | |
539 | void QPieSlice::setValue(qreal value) |
540 | { |
541 | Q_D(QPieSlice); |
542 | value = qAbs(t: value); // negative values not allowed |
543 | if (qFuzzyCompare(p1: d->m_value, p2: value)) |
544 | return; |
545 | |
546 | d->m_value = value; |
547 | emit sliceChanged(); |
548 | emit valueChanged(); |
549 | } |
550 | |
551 | qreal QPieSlice::value() const |
552 | { |
553 | Q_D(const QPieSlice); |
554 | return d->m_value; |
555 | } |
556 | |
557 | void QPieSlice::setExploded(bool exploded) |
558 | { |
559 | Q_D(QPieSlice); |
560 | |
561 | if (d->m_isExploded == exploded) |
562 | return; |
563 | |
564 | d->m_isExploded = exploded; |
565 | emit sliceChanged(); |
566 | emit explodedChanged(); |
567 | } |
568 | |
569 | bool QPieSlice::isExploded() const |
570 | { |
571 | Q_D(const QPieSlice); |
572 | return d->m_isExploded; |
573 | } |
574 | |
575 | void QPieSlice::setExplodeDistanceFactor(qreal factor) |
576 | { |
577 | Q_D(QPieSlice); |
578 | |
579 | if (qFuzzyCompare(p1: d->m_explodeDistanceFactor, p2: factor)) |
580 | return; |
581 | |
582 | d->m_explodeDistanceFactor = factor; |
583 | emit sliceChanged(); |
584 | emit explodeDistanceFactorChanged(); |
585 | } |
586 | |
587 | qreal QPieSlice::explodeDistanceFactor() const |
588 | { |
589 | Q_D(const QPieSlice); |
590 | return d->m_explodeDistanceFactor; |
591 | } |
592 | |
593 | void QPieSlice::setColor(QColor color) |
594 | { |
595 | Q_D(QPieSlice); |
596 | if (d->m_color == color) |
597 | return; |
598 | |
599 | d->m_color = color; |
600 | emit colorChanged(); |
601 | } |
602 | |
603 | QColor QPieSlice::color() const |
604 | { |
605 | Q_D(const QPieSlice); |
606 | return d->m_color; |
607 | } |
608 | |
609 | void QPieSlice::setBorderColor(QColor borderColor) |
610 | { |
611 | Q_D(QPieSlice); |
612 | if (d->m_borderColor == borderColor) |
613 | return; |
614 | |
615 | d->m_borderColor = borderColor; |
616 | emit borderColorChanged(); |
617 | } |
618 | |
619 | QColor QPieSlice::borderColor() const |
620 | { |
621 | Q_D(const QPieSlice); |
622 | return d->m_borderColor; |
623 | } |
624 | |
625 | void QPieSlice::setBorderWidth(qreal borderWidth) |
626 | { |
627 | Q_D(QPieSlice); |
628 | if (d->m_borderWidth == borderWidth) |
629 | return; |
630 | |
631 | d->m_borderWidth = borderWidth; |
632 | emit borderWidthChanged(); |
633 | } |
634 | |
635 | qreal QPieSlice::borderWidth() const |
636 | { |
637 | Q_D(const QPieSlice); |
638 | return d->m_borderWidth; |
639 | } |
640 | |
641 | QPieSlicePrivate::QPieSlicePrivate() |
642 | : m_isLabelVisible(false) |
643 | , m_labelPosition(QPieSlice::LabelPosition::Outside) |
644 | , m_labelArmLengthFactor(.15) |
645 | , m_value(0.0) |
646 | , m_percentage(0.0) |
647 | , m_startAngle(0.0) |
648 | , m_angleSpan(0.0) |
649 | , m_isExploded(false) |
650 | , m_explodeDistanceFactor(.15) |
651 | , m_labelDirty(false) |
652 | , m_borderWidth(1.0) |
653 | , m_shapePath(new QQuickShapePath) |
654 | , m_labelItem(new QQuickText) |
655 | , m_labelShape(new QQuickShape) |
656 | , m_labelPath(new QQuickShapePath) |
657 | { |
658 | m_labelItem->setColor(Qt::white); |
659 | m_labelItem->setVisible(m_isLabelVisible); |
660 | m_labelShape->setVisible(m_isLabelVisible); |
661 | m_labelPath->setParent(m_labelShape); |
662 | auto data = m_labelShape->data(); |
663 | data.append(&data, m_labelPath); |
664 | m_labelPath->setFillColor(Qt::transparent); |
665 | } |
666 | |
667 | QPieSlicePrivate::~QPieSlicePrivate() {} |
668 | |
669 | void QPieSlicePrivate::setPercentage(qreal percentage) |
670 | { |
671 | Q_Q(QPieSlice); |
672 | if (qFuzzyCompare(p1: m_percentage, p2: percentage)) |
673 | return; |
674 | m_percentage = percentage; |
675 | emit q->percentageChanged(); |
676 | } |
677 | |
678 | void QPieSlicePrivate::setStartAngle(qreal angle) |
679 | { |
680 | Q_Q(QPieSlice); |
681 | if (qFuzzyCompare(p1: m_startAngle, p2: angle)) |
682 | return; |
683 | m_startAngle = angle; |
684 | emit q->startAngleChanged(); |
685 | } |
686 | |
687 | void QPieSlicePrivate::setAngleSpan(qreal span) |
688 | { |
689 | Q_Q(QPieSlice); |
690 | if (qFuzzyCompare(p1: m_angleSpan, p2: span)) |
691 | return; |
692 | m_angleSpan = span; |
693 | emit q->angleSpanChanged(); |
694 | } |
695 | |
696 | void QPieSlicePrivate::setLabelVisible(bool visible) |
697 | { |
698 | m_isLabelVisible = visible; |
699 | m_labelItem->setVisible(visible); |
700 | if (m_labelPosition == QPieSlice::LabelPosition::Outside) |
701 | m_labelShape->setVisible(visible); |
702 | } |
703 | |
704 | void QPieSlicePrivate::setLabelPosition(QPieSlice::LabelPosition position) |
705 | { |
706 | m_labelPosition = position; |
707 | |
708 | if (position == QPieSlice::LabelPosition::Outside) { |
709 | m_labelShape->setVisible(m_isLabelVisible); |
710 | qreal radian = qDegreesToRadians(degrees: m_startAngle + (m_angleSpan * .5)); |
711 | QQuickText *labelItem = m_labelItem; |
712 | qreal height = labelItem->height(); |
713 | qreal labelWidth = radian > M_PI ? -labelItem->width() : labelItem->width(); |
714 | if (labelWidth > 0) |
715 | labelItem->setX(m_labelArm.x()); |
716 | else |
717 | labelItem->setX(m_labelArm.x() + labelWidth); |
718 | labelItem->setY(m_labelArm.y() - height); |
719 | labelItem->setRotation(0); |
720 | } else { |
721 | m_labelShape->setVisible(false); |
722 | qreal centerX = (m_largeArc.x() + m_centerLine.x()) / 2.0; |
723 | qreal centerY = (m_largeArc.y() + m_centerLine.y()) / 2.0; |
724 | QQuickText *labelItem = m_labelItem; |
725 | centerX -= labelItem->width() * .5; |
726 | centerY -= labelItem->height() * .5; |
727 | labelItem->setPosition(QPointF(centerX, centerY)); |
728 | |
729 | if (position == QPieSlice::LabelPosition::InsideHorizontal) { |
730 | labelItem->setRotation(0); |
731 | } else if (position == QPieSlice::LabelPosition::InsideTangential) { |
732 | labelItem->setRotation(m_startAngle + (m_angleSpan * .5)); |
733 | } else if (position == QPieSlice::LabelPosition::InsideNormal) { |
734 | qreal angle = m_startAngle + (m_angleSpan * .5); |
735 | if (angle > 180) |
736 | angle += 90; |
737 | else |
738 | angle -= 90; |
739 | labelItem->setRotation(angle); |
740 | } |
741 | } |
742 | } |
743 | |
744 | QT_END_NAMESPACE |
745 |
Definitions
- QPieSlice
- QPieSlice
- ~QPieSlice
- series
- percentage
- startAngle
- angleSpan
- setLabel
- label
- setLabelVisible
- isLabelVisible
- setLabelPosition
- labelPosition
- setLabelColor
- labelColor
- setLabelFont
- labelFont
- setLabelArmLengthFactor
- labelArmLengthFactor
- setValue
- value
- setExploded
- isExploded
- setExplodeDistanceFactor
- explodeDistanceFactor
- setColor
- color
- setBorderColor
- borderColor
- setBorderWidth
- borderWidth
- QPieSlicePrivate
- ~QPieSlicePrivate
- setPercentage
- setStartAngle
- setAngleSpan
- setLabelVisible
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