| @@ -1,249 +1,250 | |||
|
|
1 | 1 | /**************************************************************************** |
|
|
2 | 2 | ** |
|
|
3 | 3 | ** Copyright (C) 2012 Digia Plc |
|
|
4 | 4 | ** All rights reserved. |
|
|
5 | 5 | ** For any questions to Digia, please use contact form at http://qt.digia.com |
|
|
6 | 6 | ** |
|
|
7 | 7 | ** This file is part of the Qt Commercial Charts Add-on. |
|
|
8 | 8 | ** |
|
|
9 | 9 | ** $QT_BEGIN_LICENSE$ |
|
|
10 | 10 | ** Licensees holding valid Qt Commercial licenses may use this file in |
|
|
11 | 11 | ** accordance with the Qt Commercial License Agreement provided with the |
|
|
12 | 12 | ** Software or, alternatively, in accordance with the terms contained in |
|
|
13 | 13 | ** a written agreement between you and Digia. |
|
|
14 | 14 | ** |
|
|
15 | 15 | ** If you have questions regarding the use of this file, please use |
|
|
16 | 16 | ** contact form at http://qt.digia.com |
|
|
17 | 17 | ** $QT_END_LICENSE$ |
|
|
18 | 18 | ** |
|
|
19 | 19 | ****************************************************************************/ |
|
|
20 | 20 | |
|
|
21 | 21 | #include "piesliceitem_p.h" |
|
|
22 | 22 | #include "piechartitem_p.h" |
|
|
23 | 23 | #include "qpieseries.h" |
|
|
24 | 24 | #include "qpieslice.h" |
|
|
25 | 25 | #include "chartpresenter_p.h" |
|
|
26 | 26 | #include <QPainter> |
|
|
27 | 27 | #include <qmath.h> |
|
|
28 | 28 | #include <QGraphicsSceneEvent> |
|
|
29 | 29 | #include <QTime> |
|
|
30 | 30 | #include <QDebug> |
|
|
31 | 31 | |
|
|
32 | 32 | QTCOMMERCIALCHART_BEGIN_NAMESPACE |
|
|
33 | 33 | |
|
|
34 | 34 | QPointF offset(qreal angle, qreal length) |
|
|
35 | 35 | { |
|
|
36 | 36 | qreal dx = qSin(angle*(M_PI/180)) * length; |
|
|
37 | 37 | qreal dy = qCos(angle*(M_PI/180)) * length; |
|
|
38 | 38 | return QPointF(dx, -dy); |
|
|
39 | 39 | } |
|
|
40 | 40 | |
|
|
41 | 41 | PieSliceItem::PieSliceItem(QGraphicsItem* parent) |
|
|
42 | 42 | :QGraphicsObject(parent), |
|
|
43 | 43 | m_hovered(false) |
|
|
44 | 44 | { |
|
|
45 | 45 | setAcceptHoverEvents(true); |
|
|
46 | 46 | setAcceptedMouseButtons(Qt::MouseButtonMask); |
|
|
47 | 47 | setZValue(ChartPresenter::PieSeriesZValue); |
|
|
48 | 48 | } |
|
|
49 | 49 | |
|
|
50 | 50 | PieSliceItem::~PieSliceItem() |
|
|
51 | 51 | { |
|
|
52 | 52 | // If user is hovering over the slice and it gets destroyed we do |
|
|
53 | 53 | // not get a hover leave event. So we must emit the signal here. |
|
|
54 | 54 | if (m_hovered) |
|
|
55 | 55 | emit hovered(false); |
|
|
56 | 56 | } |
|
|
57 | 57 | |
|
|
58 | 58 | QRectF PieSliceItem::boundingRect() const |
|
|
59 | 59 | { |
|
|
60 | 60 | return m_boundingRect; |
|
|
61 | 61 | } |
|
|
62 | 62 | |
|
|
63 | 63 | QPainterPath PieSliceItem::shape() const |
|
|
64 | 64 | { |
|
|
65 | 65 | // Don't include the label and label arm. |
|
|
66 | 66 | // This is used to detect a mouse clicks. We do not want clicks from label. |
|
|
67 | 67 | return m_slicePath; |
|
|
68 | 68 | } |
|
|
69 | 69 | |
|
|
70 | 70 | void PieSliceItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* /*option*/, QWidget* /*widget*/) |
|
|
71 | 71 | { |
|
|
72 | 72 | painter->save(); |
|
|
73 | 73 | painter->setClipRect(parentItem()->boundingRect()); |
|
|
74 | 74 | painter->setPen(m_data.m_slicePen); |
|
|
75 | 75 | painter->setBrush(m_data.m_sliceBrush); |
|
|
76 | 76 | painter->drawPath(m_slicePath); |
|
|
77 | 77 | painter->restore(); |
|
|
78 | 78 | |
|
|
79 | 79 | if (m_data.m_isLabelVisible) { |
|
|
80 | 80 | painter->save(); |
|
|
81 | 81 | |
|
|
82 | 82 | // Pen for label arm not defined in the QPieSeries api, let's use brush's color instead |
|
|
83 | 83 | // Also, the drawText actually uses the pen color for the text color (unlike QGraphicsSimpleTextItem) |
|
|
84 | 84 | painter->setPen(m_data.m_labelBrush.color()); |
|
|
85 | 85 | painter->setBrush(m_data.m_labelBrush); |
|
|
86 | 86 | painter->setFont(m_data.m_labelFont); |
|
|
87 | 87 | if (m_data.m_donut) { |
|
|
88 | 88 | painter->translate(m_labelTextRect.center()); |
|
|
89 | 89 | painter->rotate(m_data.m_startAngle + m_data.m_angleSpan / 2); |
|
|
90 | 90 | painter->drawText(-m_labelTextRect.width() / 2, -m_labelTextRect.height() / 2, m_labelTextRect.width(), m_labelTextRect.height(), Qt::AlignCenter, m_data.m_labelText); |
|
|
91 | 91 | }else if (m_data.m_labelPosition == QPieSlice::LabelOutside) { |
|
|
92 | 92 | painter->setClipRect(parentItem()->boundingRect()); |
|
|
93 | 93 | painter->strokePath(m_labelArmPath, m_data.m_labelBrush.color()); |
|
|
94 | painter->drawText(m_labelTextRect, Qt::AlignCenter, m_data.m_labelText); | |
|
|
94 | 95 | } else { // QPieSlice::LabelInside |
|
|
95 | 96 | painter->setClipPath(m_slicePath); |
|
|
96 | 97 | painter->drawText(m_labelTextRect, Qt::AlignCenter, m_data.m_labelText); |
|
|
97 | 98 | } |
|
|
98 | 99 | |
|
|
99 | 100 | painter->restore(); |
|
|
100 | 101 | } |
|
|
101 | 102 | } |
|
|
102 | 103 | |
|
|
103 | 104 | void PieSliceItem::hoverEnterEvent(QGraphicsSceneHoverEvent* /*event*/) |
|
|
104 | 105 | { |
|
|
105 | 106 | m_hovered = true; |
|
|
106 | 107 | emit hovered(true); |
|
|
107 | 108 | } |
|
|
108 | 109 | |
|
|
109 | 110 | void PieSliceItem::hoverLeaveEvent(QGraphicsSceneHoverEvent* /*event*/) |
|
|
110 | 111 | { |
|
|
111 | 112 | m_hovered = false; |
|
|
112 | 113 | emit hovered(false); |
|
|
113 | 114 | } |
|
|
114 | 115 | |
|
|
115 | 116 | void PieSliceItem::mousePressEvent(QGraphicsSceneMouseEvent *event) |
|
|
116 | 117 | { |
|
|
117 | 118 | emit clicked(event->buttons()); |
|
|
118 | 119 | } |
|
|
119 | 120 | |
|
|
120 | 121 | void PieSliceItem::setLayout(const PieSliceData &sliceData) |
|
|
121 | 122 | { |
|
|
122 | 123 | m_data = sliceData; |
|
|
123 | 124 | updateGeometry(); |
|
|
124 | 125 | update(); |
|
|
125 | 126 | } |
|
|
126 | 127 | |
|
|
127 | 128 | void PieSliceItem::updateGeometry() |
|
|
128 | 129 | { |
|
|
129 | 130 | if (m_data.m_radius <= 0) |
|
|
130 | 131 | return; |
|
|
131 | 132 | |
|
|
132 | 133 | prepareGeometryChange(); |
|
|
133 | 134 | |
|
|
134 | 135 | // slice path |
|
|
135 | 136 | qreal centerAngle; |
|
|
136 | 137 | QPointF armStart; |
|
|
137 | 138 | m_slicePath = slicePath(m_data.m_center, m_data.m_radius, m_data.m_startAngle, m_data.m_angleSpan, ¢erAngle, &armStart); |
|
|
138 | 139 | |
|
|
139 | 140 | // text rect |
|
|
140 | 141 | QFontMetricsF fm(m_data.m_labelFont); |
|
|
141 | 142 | m_labelTextRect = QRectF(0, 0, fm.width(m_data.m_labelText), fm.height()); |
|
|
142 | 143 | |
|
|
143 | 144 | // label arm path |
|
|
144 | 145 | QPointF labelTextStart; |
|
|
145 | 146 | m_labelArmPath = labelArmPath(armStart, centerAngle, m_data.m_radius * m_data.m_labelArmLengthFactor, m_labelTextRect.width(), &labelTextStart); |
|
|
146 | 147 | |
|
|
147 | 148 | // text position |
|
|
148 | 149 | if (m_data.m_donut) { |
|
|
149 | 150 | QPointF donutCenter = m_data.m_center + offset(centerAngle, m_data.m_innerRadius + (m_data.m_radius - m_data.m_innerRadius) / 2); |
|
|
150 | 151 | m_labelTextRect.moveCenter(donutCenter); |
|
|
151 | 152 | } else if (m_data.m_labelPosition == QPieSlice::LabelOutside) { |
|
|
152 | 153 | m_labelTextRect.moveBottomLeft(labelTextStart); |
|
|
153 | 154 | } else {// QPieSlice::LabelInside |
|
|
154 | 155 | QPointF sliceCenter = m_data.m_center + offset(centerAngle, m_data.m_radius / 2); |
|
|
155 | 156 | m_labelTextRect.moveCenter(sliceCenter); |
|
|
156 | 157 | } |
|
|
157 | 158 | |
|
|
158 | 159 | // bounding rect |
|
|
159 | 160 | if (m_data.m_isLabelVisible) |
|
|
160 | 161 | m_boundingRect = m_slicePath.boundingRect().united(m_labelArmPath.boundingRect()).united(m_labelTextRect); |
|
|
161 | 162 | else |
|
|
162 | 163 | m_boundingRect = m_slicePath.boundingRect(); |
|
|
163 | 164 | } |
|
|
164 | 165 | |
|
|
165 | 166 | QPointF PieSliceItem::sliceCenter(QPointF point, qreal radius, QPieSlice *slice) |
|
|
166 | 167 | { |
|
|
167 | 168 | if (slice->isExploded()) { |
|
|
168 | 169 | qreal centerAngle = slice->startAngle() + (slice->angleSpan()/2); |
|
|
169 | 170 | qreal len = radius * slice->explodeDistanceFactor(); |
|
|
170 | 171 | point += offset(centerAngle, len); |
|
|
171 | 172 | } |
|
|
172 | 173 | return point; |
|
|
173 | 174 | } |
|
|
174 | 175 | |
|
|
175 | 176 | QPainterPath PieSliceItem::slicePath(QPointF center, qreal radius, qreal startAngle, qreal angleSpan, qreal *centerAngle, QPointF* armStart) |
|
|
176 | 177 | { |
|
|
177 | 178 | // calculate center angle |
|
|
178 | 179 | *centerAngle = startAngle + (angleSpan/2); |
|
|
179 | 180 | |
|
|
180 | 181 | // calculate slice rectangle |
|
|
181 | 182 | QRectF rect(center.x()-radius, center.y()-radius, radius*2, radius*2); |
|
|
182 | 183 | |
|
|
183 | 184 | // slice path |
|
|
184 | 185 | QPainterPath path; |
|
|
185 | 186 | if (m_data.m_donut) { |
|
|
186 | 187 | QRectF insideRect(center.x() - m_data.m_innerRadius, center.y()-m_data.m_innerRadius, m_data.m_innerRadius*2, m_data.m_innerRadius*2); |
|
|
187 | 188 | path.arcMoveTo(rect, -startAngle + 90); |
|
|
188 | 189 | path.arcTo(rect, -startAngle + 90, -angleSpan); |
|
|
189 | 190 | path.arcTo(insideRect, -startAngle + 90 - angleSpan, angleSpan); |
|
|
190 | 191 | path.closeSubpath(); |
|
|
191 | 192 | } else { |
|
|
192 | 193 | path.moveTo(rect.center()); |
|
|
193 | 194 | path.arcTo(rect, -startAngle + 90, -angleSpan); |
|
|
194 | 195 | path.closeSubpath(); |
|
|
195 | 196 | } |
|
|
196 | 197 | |
|
|
197 | 198 | // calculate label arm start point |
|
|
198 | 199 | *armStart = center; |
|
|
199 | 200 | *armStart += offset(*centerAngle, radius + PIESLICE_LABEL_GAP); |
|
|
200 | 201 | |
|
|
201 | 202 | return path; |
|
|
202 | 203 | } |
|
|
203 | 204 | |
|
|
204 | 205 | QPainterPath PieSliceItem::labelArmPath(QPointF start, qreal angle, qreal length, qreal textWidth, QPointF *textStart) |
|
|
205 | 206 | { |
|
|
206 | 207 | // Normalize the angle to 0-360 range |
|
|
207 | 208 | // NOTE: We are using int here on purpose. Depenging on platform and hardware |
|
|
208 | 209 | // qreal can be a double, float or something the user gives to the Qt configure |
|
|
209 | 210 | // (QT_COORD_TYPE). Compilers do not seem to support modulo for double or float |
|
|
210 | 211 | // but there are fmod() and fmodf() functions for that. So instead of some #ifdef |
|
|
211 | 212 | // that might break we just use int. Precision for this is just fine for our needs. |
|
|
212 | 213 | int normalized = angle * 10.0; |
|
|
213 | 214 | normalized = normalized % 3600; |
|
|
214 | 215 | if (normalized < 0) |
|
|
215 | 216 | normalized += 3600; |
|
|
216 | 217 | angle = (qreal) normalized / 10.0; |
|
|
217 | 218 | |
|
|
218 | 219 | // prevent label arm pointing straight down because it will look bad |
|
|
219 | 220 | if (angle < 180 && angle > 170) |
|
|
220 | 221 | angle = 170; |
|
|
221 | 222 | if (angle > 180 && angle < 190) |
|
|
222 | 223 | angle = 190; |
|
|
223 | 224 | |
|
|
224 | 225 | // line from slice to label |
|
|
225 | 226 | QPointF parm1 = start + offset(angle, length); |
|
|
226 | 227 | |
|
|
227 | 228 | // line to underline the label |
|
|
228 | 229 | QPointF parm2 = parm1; |
|
|
229 | 230 | if (angle < 180) { // arm swings the other way on the left side |
|
|
230 | 231 | parm2 += QPointF(textWidth, 0); |
|
|
231 | 232 | *textStart = parm1; |
|
|
232 | 233 | } |
|
|
233 | 234 | else { |
|
|
234 | 235 | parm2 += QPointF(-textWidth,0); |
|
|
235 | 236 | *textStart = parm2; |
|
|
236 | 237 | } |
|
|
237 | 238 | |
|
|
238 | 239 | QPainterPath path; |
|
|
239 | 240 | path.moveTo(start); |
|
|
240 | 241 | path.lineTo(parm1); |
|
|
241 | 242 | path.lineTo(parm2); |
|
|
242 | 243 | |
|
|
243 | 244 | return path; |
|
|
244 | 245 | } |
|
|
245 | 246 | |
|
|
246 | 247 | #include "moc_piesliceitem_p.cpp" |
|
|
247 | 248 | |
|
|
248 | 249 | QTCOMMERCIALCHART_END_NAMESPACE |
|
|
249 | 250 | |
General Comments 0
You need to be logged in to leave comments.
Login now