source: trunk/src/gui/styles/qstylehelper.cpp@ 1147

Last change on this file since 1147 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
  • Property svn:eol-style set to native
File size: 13.9 KB
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1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation (qt-info@nokia.com)
6**
7** This file is part of the QtGui module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at qt-info@nokia.com.
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include <qstyleoption.h>
43#include <qpainter.h>
44#include <qpixmapcache.h>
45#include <private/qmath_p.h>
46#include <private/qstyle_p.h>
47#include <qmath.h>
48
49#if defined(Q_WS_WIN)
50#include "qt_windows.h"
51#elif defined(Q_WS_MAC)
52#include <private/qt_cocoa_helpers_mac_p.h>
53#endif
54
55#include "qstylehelper_p.h"
56#include <qstringbuilder.h>
57
58QT_BEGIN_NAMESPACE
59
60namespace QStyleHelper {
61
62QString uniqueName(const QString &key, const QStyleOption *option, const QSize &size)
63{
64 const QStyleOptionComplex *complexOption = qstyleoption_cast<const QStyleOptionComplex *>(option);
65 QString tmp = key % HexString<uint>(option->state)
66 % HexString<uint>(option->direction)
67 % HexString<uint>(complexOption ? uint(complexOption->activeSubControls) : 0u)
68 % HexString<quint64>(option->palette.cacheKey())
69 % HexString<uint>(size.width())
70 % HexString<uint>(size.height());
71
72#ifndef QT_NO_SPINBOX
73 if (const QStyleOptionSpinBox *spinBox = qstyleoption_cast<const QStyleOptionSpinBox *>(option)) {
74 tmp = tmp % HexString<uint>(spinBox->buttonSymbols)
75 % HexString<uint>(spinBox->stepEnabled)
76 % QLatin1Char(spinBox->frame ? '1' : '0'); ;
77 }
78#endif // QT_NO_SPINBOX
79 return tmp;
80}
81
82qreal dpiScaled(qreal value)
83{
84 static qreal scale = -1;
85 if (scale < 0) {
86 scale = 1.0;
87#if defined(Q_WS_WIN)
88 {
89 HDC hdcScreen = GetDC(0);
90 int dpi = GetDeviceCaps(hdcScreen, LOGPIXELSX);
91 ReleaseDC(0, hdcScreen);
92 scale = dpi/96.0;
93 }
94#elif defined(Q_WS_MAC)
95 scale = qt_mac_get_scalefactor();
96#endif
97 }
98 return value * scale;
99}
100
101
102#ifndef QT_NO_DIAL
103
104int calcBigLineSize(int radius)
105{
106 int bigLineSize = radius / 6;
107 if (bigLineSize < 4)
108 bigLineSize = 4;
109 if (bigLineSize > radius / 2)
110 bigLineSize = radius / 2;
111 return bigLineSize;
112}
113
114static QPointF calcRadialPos(const QStyleOptionSlider *dial, qreal offset)
115{
116 const int width = dial->rect.width();
117 const int height = dial->rect.height();
118 const int r = qMin(width, height) / 2;
119 const int currentSliderPosition = dial->upsideDown ? dial->sliderPosition : (dial->maximum - dial->sliderPosition);
120 qreal a = 0;
121 if (dial->maximum == dial->minimum)
122 a = Q_PI / 2;
123 else if (dial->dialWrapping)
124 a = Q_PI * 3 / 2 - (currentSliderPosition - dial->minimum) * 2 * Q_PI
125 / (dial->maximum - dial->minimum);
126 else
127 a = (Q_PI * 8 - (currentSliderPosition - dial->minimum) * 10 * Q_PI
128 / (dial->maximum - dial->minimum)) / 6;
129 qreal xc = width / 2.0;
130 qreal yc = height / 2.0;
131 qreal len = r - QStyleHelper::calcBigLineSize(r) - 3;
132 qreal back = offset * len;
133 QPointF pos(QPointF(xc + back * qCos(a), yc - back * qSin(a)));
134 return pos;
135}
136
137qreal angle(const QPointF &p1, const QPointF &p2)
138{
139 static const qreal rad_factor = 180 / Q_PI;
140 qreal _angle = 0;
141
142 if (p1.x() == p2.x()) {
143 if (p1.y() < p2.y())
144 _angle = 270;
145 else
146 _angle = 90;
147 } else {
148 qreal x1, x2, y1, y2;
149
150 if (p1.x() <= p2.x()) {
151 x1 = p1.x(); y1 = p1.y();
152 x2 = p2.x(); y2 = p2.y();
153 } else {
154 x2 = p1.x(); y2 = p1.y();
155 x1 = p2.x(); y1 = p2.y();
156 }
157
158 qreal m = -(y2 - y1) / (x2 - x1);
159 _angle = qAtan(m) * rad_factor;
160
161 if (p1.x() < p2.x())
162 _angle = 180 - _angle;
163 else
164 _angle = -_angle;
165 }
166 return _angle;
167}
168
169QPolygonF calcLines(const QStyleOptionSlider *dial)
170{
171 QPolygonF poly;
172 int width = dial->rect.width();
173 int height = dial->rect.height();
174 qreal r = qMin(width, height) / 2;
175 int bigLineSize = calcBigLineSize(int(r));
176
177 qreal xc = width / 2 + 0.5;
178 qreal yc = height / 2 + 0.5;
179 int ns = dial->tickInterval;
180 int notches = (dial->maximum + ns - 1 - dial->minimum) / ns;
181 if (notches <= 0)
182 return poly;
183 if (dial->maximum < dial->minimum || dial->maximum - dial->minimum > 1000) {
184 int maximum = dial->minimum + 1000;
185 notches = (maximum + ns - 1 - dial->minimum) / ns;
186 }
187
188 poly.resize(2 + 2 * notches);
189 int smallLineSize = bigLineSize / 2;
190 for (int i = 0; i <= notches; ++i) {
191 qreal angle = dial->dialWrapping ? Q_PI * 3 / 2 - i * 2 * Q_PI / notches
192 : (Q_PI * 8 - i * 10 * Q_PI / notches) / 6;
193 qreal s = qSin(angle);
194 qreal c = qCos(angle);
195 if (i == 0 || (((ns * i) % (dial->pageStep ? dial->pageStep : 1)) == 0)) {
196 poly[2 * i] = QPointF(xc + (r - bigLineSize) * c,
197 yc - (r - bigLineSize) * s);
198 poly[2 * i + 1] = QPointF(xc + r * c, yc - r * s);
199 } else {
200 poly[2 * i] = QPointF(xc + (r - 1 - smallLineSize) * c,
201 yc - (r - 1 - smallLineSize) * s);
202 poly[2 * i + 1] = QPointF(xc + (r - 1) * c, yc -(r - 1) * s);
203 }
204 }
205 return poly;
206}
207
208// This will draw a nice and shiny QDial for us. We don't want
209// all the shinyness in QWindowsStyle, hence we place it here
210
211void drawDial(const QStyleOptionSlider *option, QPainter *painter)
212{
213 QPalette pal = option->palette;
214 QColor buttonColor = pal.button().color();
215 const int width = option->rect.width();
216 const int height = option->rect.height();
217 const bool enabled = option->state & QStyle::State_Enabled;
218 qreal r = qMin(width, height) / 2;
219 r -= r/50;
220 const qreal penSize = r/20.0;
221
222 painter->save();
223 painter->setRenderHint(QPainter::Antialiasing);
224
225 // Draw notches
226 if (option->subControls & QStyle::SC_DialTickmarks) {
227 painter->setPen(option->palette.dark().color().darker(120));
228 painter->drawLines(QStyleHelper::calcLines(option));
229 }
230
231 // Cache dial background
232 BEGIN_STYLE_PIXMAPCACHE(QString::fromLatin1("qdial"));
233 p->setRenderHint(QPainter::Antialiasing);
234
235 const qreal d_ = r / 6;
236 const qreal dx = option->rect.x() + d_ + (width - 2 * r) / 2 + 1;
237 const qreal dy = option->rect.y() + d_ + (height - 2 * r) / 2 + 1;
238
239 QRectF br = QRectF(dx + 0.5, dy + 0.5,
240 int(r * 2 - 2 * d_ - 2),
241 int(r * 2 - 2 * d_ - 2));
242 buttonColor.setHsv(buttonColor .hue(),
243 qMin(140, buttonColor .saturation()),
244 qMax(180, buttonColor.value()));
245 QColor shadowColor(0, 0, 0, 20);
246
247 if (enabled) {
248 // Drop shadow
249 qreal shadowSize = qMax(1.0, penSize/2.0);
250 QRectF shadowRect= br.adjusted(-2*shadowSize, -2*shadowSize,
251 2*shadowSize, 2*shadowSize);
252 QRadialGradient shadowGradient(shadowRect.center().x(),
253 shadowRect.center().y(), shadowRect.width()/2.0,
254 shadowRect.center().x(), shadowRect.center().y());
255 shadowGradient.setColorAt(qreal(0.91), QColor(0, 0, 0, 40));
256 shadowGradient.setColorAt(qreal(1.0), Qt::transparent);
257 p->setBrush(shadowGradient);
258 p->setPen(Qt::NoPen);
259 p->translate(shadowSize, shadowSize);
260 p->drawEllipse(shadowRect);
261 p->translate(-shadowSize, -shadowSize);
262
263 // Main gradient
264 QRadialGradient gradient(br.center().x() - br.width()/3, dy,
265 br.width()*1.3, br.center().x(),
266 br.center().y() - br.height()/2);
267 gradient.setColorAt(0, buttonColor.lighter(110));
268 gradient.setColorAt(qreal(0.5), buttonColor);
269 gradient.setColorAt(qreal(0.501), buttonColor.darker(102));
270 gradient.setColorAt(1, buttonColor.darker(115));
271 p->setBrush(gradient);
272 } else {
273 p->setBrush(Qt::NoBrush);
274 }
275
276 p->setPen(QPen(buttonColor.darker(280)));
277 p->drawEllipse(br);
278 p->setBrush(Qt::NoBrush);
279 p->setPen(buttonColor.lighter(110));
280 p->drawEllipse(br.adjusted(1, 1, -1, -1));
281
282 if (option->state & QStyle::State_HasFocus) {
283 QColor highlight = pal.highlight().color();
284 highlight.setHsv(highlight.hue(),
285 qMin(160, highlight.saturation()),
286 qMax(230, highlight.value()));
287 highlight.setAlpha(127);
288 p->setPen(QPen(highlight, 2.0));
289 p->setBrush(Qt::NoBrush);
290 p->drawEllipse(br.adjusted(-1, -1, 1, 1));
291 }
292
293 END_STYLE_PIXMAPCACHE
294
295 QPointF dp = calcRadialPos(option, qreal(0.70));
296 buttonColor = buttonColor.lighter(104);
297 buttonColor.setAlphaF(qreal(0.8));
298 const qreal ds = r/qreal(7.0);
299 QRectF dialRect(dp.x() - ds, dp.y() - ds, 2*ds, 2*ds);
300 QRadialGradient dialGradient(dialRect.center().x() + dialRect.width()/2,
301 dialRect.center().y() + dialRect.width(),
302 dialRect.width()*2,
303 dialRect.center().x(), dialRect.center().y());
304 dialGradient.setColorAt(1, buttonColor.darker(140));
305 dialGradient.setColorAt(qreal(0.4), buttonColor.darker(120));
306 dialGradient.setColorAt(0, buttonColor.darker(110));
307 if (penSize > 3.0) {
308 painter->setPen(QPen(QColor(0, 0, 0, 25), penSize));
309 painter->drawLine(calcRadialPos(option, qreal(0.90)), calcRadialPos(option, qreal(0.96)));
310 }
311
312 painter->setBrush(dialGradient);
313 painter->setPen(QColor(255, 255, 255, 150));
314 painter->drawEllipse(dialRect.adjusted(-1, -1, 1, 1));
315 painter->setPen(QColor(0, 0, 0, 80));
316 painter->drawEllipse(dialRect);
317 painter->restore();
318}
319#endif //QT_NO_DIAL
320
321void drawBorderPixmap(const QPixmap &pixmap, QPainter *painter, const QRect &rect,
322 int left, int top, int right,
323 int bottom)
324{
325 QSize size = pixmap.size();
326 //painter->setRenderHint(QPainter::SmoothPixmapTransform);
327
328 //top
329 if (top > 0) {
330 painter->drawPixmap(QRect(rect.left() + left, rect.top(), rect.width() -right - left, top), pixmap,
331 QRect(left, 0, size.width() -right - left, top));
332
333 //top-left
334 if(left > 0)
335 painter->drawPixmap(QRect(rect.left(), rect.top(), left, top), pixmap,
336 QRect(0, 0, left, top));
337
338 //top-right
339 if (right > 0)
340 painter->drawPixmap(QRect(rect.left() + rect.width() - right, rect.top(), right, top), pixmap,
341 QRect(size.width() - right, 0, right, top));
342 }
343
344 //left
345 if (left > 0)
346 painter->drawPixmap(QRect(rect.left(), rect.top()+top, left, rect.height() - top - bottom), pixmap,
347 QRect(0, top, left, size.height() - bottom - top));
348
349 //center
350 painter->drawPixmap(QRect(rect.left() + left, rect.top()+top, rect.width() -right - left,
351 rect.height() - bottom - top), pixmap,
352 QRect(left, top, size.width() -right -left,
353 size.height() - bottom - top));
354 //right
355 if (right > 0)
356 painter->drawPixmap(QRect(rect.left() +rect.width() - right, rect.top()+top, right, rect.height() - top - bottom), pixmap,
357 QRect(size.width() - right, top, right, size.height() - bottom - top));
358
359 //bottom
360 if (bottom > 0) {
361 painter->drawPixmap(QRect(rect.left() +left, rect.top() + rect.height() - bottom,
362 rect.width() - right - left, bottom), pixmap,
363 QRect(left, size.height() - bottom,
364 size.width() - right - left, bottom));
365 //bottom-left
366 if (left > 0)
367 painter->drawPixmap(QRect(rect.left(), rect.top() + rect.height() - bottom, left, bottom), pixmap,
368 QRect(0, size.height() - bottom, left, bottom));
369
370 //bottom-right
371 if (right > 0)
372 painter->drawPixmap(QRect(rect.left() + rect.width() - right, rect.top() + rect.height() - bottom, right, bottom), pixmap,
373 QRect(size.width() - right, size.height() - bottom, right, bottom));
374
375 }
376}
377}
378QT_END_NAMESPACE
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