source: trunk/src/gui/styles/qstylehelper.cpp@ 621

Last change on this file since 621 was 561, checked in by Dmitry A. Kuminov, 16 years ago

trunk: Merged in qt 4.6.1 sources.
  • Property svn:eol-style set to native
File size: 13.9 KB
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1/****************************************************************************
2**
3** Copyright (C) 2009 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
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35**
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39**
40****************************************************************************/
41
42#include "qstylehelper_p.h"
43
44#include <qstyleoption.h>
45#include <qpainter.h>
46#include <qpixmapcache.h>
47#include <private/qmath_p.h>
48#include <private/qstyle_p.h>
49#include <qmath.h>
50
51#if defined(Q_WS_WIN)
52#include "qt_windows.h"
53#elif defined(Q_WS_MAC)
54#include <private/qt_cocoa_helpers_mac_p.h>
55#endif
56
57QT_BEGIN_NAMESPACE
58
59namespace QStyleHelper {
60
61QString uniqueName(const QString &key, const QStyleOption *option, const QSize &size)
62{
63 const QStyleOptionComplex *complexOption = qstyleoption_cast<const QStyleOptionComplex *>(option);
64 QString tmp = QString::fromLatin1("%1-%2-%3-%4-%5-%6x%7").arg(key).arg(uint(option->state)).arg(option->direction)
65 .arg(complexOption ? uint(complexOption->activeSubControls) : uint(0))
66 .arg(option->palette.cacheKey()).arg(size.width()).arg(size.height());
67#ifndef QT_NO_SPINBOX
68 if (const QStyleOptionSpinBox *spinBox = qstyleoption_cast<const QStyleOptionSpinBox *>(option)) {
69 tmp.append(QLatin1Char('-'));
70 tmp.append(QString::number(spinBox->buttonSymbols));
71 tmp.append(QLatin1Char('-'));
72 tmp.append(QString::number(spinBox->stepEnabled));
73 tmp.append(QLatin1Char('-'));
74 tmp.append(QLatin1Char(spinBox->frame ? '1' : '0'));
75 }
76#endif // QT_NO_SPINBOX
77 return tmp;
78}
79
80qreal dpiScaled(qreal value)
81{
82 static qreal scale = -1;
83 if (scale < 0) {
84 scale = 1.0;
85#if defined(Q_WS_WIN)
86 {
87 HDC hdcScreen = GetDC(0);
88 int dpi = GetDeviceCaps(hdcScreen, LOGPIXELSX);
89 ReleaseDC(0, hdcScreen);
90 scale = dpi/96.0;
91 }
92#elif defined(Q_WS_MAC)
93 scale = qt_mac_get_scalefactor();
94#endif
95 }
96 return value * scale;
97}
98
99
100#ifndef QT_NO_DIAL
101
102int calcBigLineSize(int radius)
103{
104 int bigLineSize = radius / 6;
105 if (bigLineSize < 4)
106 bigLineSize = 4;
107 if (bigLineSize > radius / 2)
108 bigLineSize = radius / 2;
109 return bigLineSize;
110}
111
112static QPointF calcRadialPos(const QStyleOptionSlider *dial, qreal offset)
113{
114 const int width = dial->rect.width();
115 const int height = dial->rect.height();
116 const int r = qMin(width, height) / 2;
117 const int currentSliderPosition = dial->upsideDown ? dial->sliderPosition : (dial->maximum - dial->sliderPosition);
118 qreal a = 0;
119 if (dial->maximum == dial->minimum)
120 a = Q_PI / 2;
121 else if (dial->dialWrapping)
122 a = Q_PI * 3 / 2 - (currentSliderPosition - dial->minimum) * 2 * Q_PI
123 / (dial->maximum - dial->minimum);
124 else
125 a = (Q_PI * 8 - (currentSliderPosition - dial->minimum) * 10 * Q_PI
126 / (dial->maximum - dial->minimum)) / 6;
127 qreal xc = width / 2.0;
128 qreal yc = height / 2.0;
129 qreal len = r - QStyleHelper::calcBigLineSize(r) - 3;
130 qreal back = offset * len;
131 QPointF pos(QPointF(xc + back * qCos(a), yc - back * qSin(a)));
132 return pos;
133}
134
135qreal angle(const QPointF &p1, const QPointF &p2)
136{
137 static const qreal rad_factor = 180 / Q_PI;
138 qreal _angle = 0;
139
140 if (p1.x() == p2.x()) {
141 if (p1.y() < p2.y())
142 _angle = 270;
143 else
144 _angle = 90;
145 } else {
146 qreal x1, x2, y1, y2;
147
148 if (p1.x() <= p2.x()) {
149 x1 = p1.x(); y1 = p1.y();
150 x2 = p2.x(); y2 = p2.y();
151 } else {
152 x2 = p1.x(); y2 = p1.y();
153 x1 = p2.x(); y1 = p2.y();
154 }
155
156 qreal m = -(y2 - y1) / (x2 - x1);
157 _angle = qAtan(m) * rad_factor;
158
159 if (p1.x() < p2.x())
160 _angle = 180 - _angle;
161 else
162 _angle = -_angle;
163 }
164 return _angle;
165}
166
167QPolygonF calcLines(const QStyleOptionSlider *dial)
168{
169 QPolygonF poly;
170 int width = dial->rect.width();
171 int height = dial->rect.height();
172 qreal r = qMin(width, height) / 2;
173 int bigLineSize = calcBigLineSize(int(r));
174
175 qreal xc = width / 2 + 0.5;
176 qreal yc = height / 2 + 0.5;
177 int ns = dial->tickInterval;
178 int notches = (dial->maximum + ns - 1 - dial->minimum) / ns;
179 if (notches <= 0)
180 return poly;
181 if (dial->maximum < dial->minimum || dial->maximum - dial->minimum > 1000) {
182 int maximum = dial->minimum + 1000;
183 notches = (maximum + ns - 1 - dial->minimum) / ns;
184 }
185
186 poly.resize(2 + 2 * notches);
187 int smallLineSize = bigLineSize / 2;
188 for (int i = 0; i <= notches; ++i) {
189 qreal angle = dial->dialWrapping ? Q_PI * 3 / 2 - i * 2 * Q_PI / notches
190 : (Q_PI * 8 - i * 10 * Q_PI / notches) / 6;
191 qreal s = qSin(angle);
192 qreal c = qCos(angle);
193 if (i == 0 || (((ns * i) % (dial->pageStep ? dial->pageStep : 1)) == 0)) {
194 poly[2 * i] = QPointF(xc + (r - bigLineSize) * c,
195 yc - (r - bigLineSize) * s);
196 poly[2 * i + 1] = QPointF(xc + r * c, yc - r * s);
197 } else {
198 poly[2 * i] = QPointF(xc + (r - 1 - smallLineSize) * c,
199 yc - (r - 1 - smallLineSize) * s);
200 poly[2 * i + 1] = QPointF(xc + (r - 1) * c, yc -(r - 1) * s);
201 }
202 }
203 return poly;
204}
205
206// This will draw a nice and shiny QDial for us. We don't want
207// all the shinyness in QWindowsStyle, hence we place it here
208
209void drawDial(const QStyleOptionSlider *option, QPainter *painter)
210{
211 QPalette pal = option->palette;
212 QColor buttonColor = pal.button().color();
213 const int width = option->rect.width();
214 const int height = option->rect.height();
215 const bool enabled = option->state & QStyle::State_Enabled;
216 qreal r = qMin(width, height) / 2;
217 r -= r/50;
218 const qreal penSize = r/20.0;
219
220 painter->save();
221 painter->setRenderHint(QPainter::Antialiasing);
222
223 // Draw notches
224 if (option->subControls & QStyle::SC_DialTickmarks) {
225 painter->setPen(option->palette.dark().color().darker(120));
226 painter->drawLines(QStyleHelper::calcLines(option));
227 }
228
229 // Cache dial background
230 BEGIN_STYLE_PIXMAPCACHE(QString::fromLatin1("qdial"));
231 p->setRenderHint(QPainter::Antialiasing);
232
233 const qreal d_ = r / 6;
234 const qreal dx = option->rect.x() + d_ + (width - 2 * r) / 2 + 1;
235 const qreal dy = option->rect.y() + d_ + (height - 2 * r) / 2 + 1;
236
237 QRectF br = QRectF(dx + 0.5, dy + 0.5,
238 int(r * 2 - 2 * d_ - 2),
239 int(r * 2 - 2 * d_ - 2));
240 buttonColor.setHsv(buttonColor .hue(),
241 qMin(140, buttonColor .saturation()),
242 qMax(180, buttonColor.value()));
243 QColor shadowColor(0, 0, 0, 20);
244
245 if (enabled) {
246 // Drop shadow
247 qreal shadowSize = qMax(1.0, penSize/2.0);
248 QRectF shadowRect= br.adjusted(-2*shadowSize, -2*shadowSize,
249 2*shadowSize, 2*shadowSize);
250 QRadialGradient shadowGradient(shadowRect.center().x(),
251 shadowRect.center().y(), shadowRect.width()/2.0,
252 shadowRect.center().x(), shadowRect.center().y());
253 shadowGradient.setColorAt(qreal(0.91), QColor(0, 0, 0, 40));
254 shadowGradient.setColorAt(qreal(1.0), Qt::transparent);
255 p->setBrush(shadowGradient);
256 p->setPen(Qt::NoPen);
257 p->translate(shadowSize, shadowSize);
258 p->drawEllipse(shadowRect);
259 p->translate(-shadowSize, -shadowSize);
260
261 // Main gradient
262 QRadialGradient gradient(br.center().x() - br.width()/3, dy,
263 br.width()*1.3, br.center().x(),
264 br.center().y() - br.height()/2);
265 gradient.setColorAt(0, buttonColor.lighter(110));
266 gradient.setColorAt(qreal(0.5), buttonColor);
267 gradient.setColorAt(qreal(0.501), buttonColor.darker(102));
268 gradient.setColorAt(1, buttonColor.darker(115));
269 p->setBrush(gradient);
270 } else {
271 p->setBrush(Qt::NoBrush);
272 }
273
274 p->setPen(QPen(buttonColor.darker(280)));
275 p->drawEllipse(br);
276 p->setBrush(Qt::NoBrush);
277 p->setPen(buttonColor.lighter(110));
278 p->drawEllipse(br.adjusted(1, 1, -1, -1));
279
280 if (option->state & QStyle::State_HasFocus) {
281 QColor highlight = pal.highlight().color();
282 highlight.setHsv(highlight.hue(),
283 qMin(160, highlight.saturation()),
284 qMax(230, highlight.value()));
285 highlight.setAlpha(127);
286 p->setPen(QPen(highlight, 2.0));
287 p->setBrush(Qt::NoBrush);
288 p->drawEllipse(br.adjusted(-1, -1, 1, 1));
289 }
290
291 END_STYLE_PIXMAPCACHE
292
293 QPointF dp = calcRadialPos(option, qreal(0.70));
294 buttonColor = buttonColor.lighter(104);
295 buttonColor.setAlphaF(qreal(0.8));
296 const qreal ds = r/qreal(7.0);
297 QRectF dialRect(dp.x() - ds, dp.y() - ds, 2*ds, 2*ds);
298 QRadialGradient dialGradient(dialRect.center().x() + dialRect.width()/2,
299 dialRect.center().y() + dialRect.width(),
300 dialRect.width()*2,
301 dialRect.center().x(), dialRect.center().y());
302 dialGradient.setColorAt(1, buttonColor.darker(140));
303 dialGradient.setColorAt(qreal(0.4), buttonColor.darker(120));
304 dialGradient.setColorAt(0, buttonColor.darker(110));
305 if (penSize > 3.0) {
306 painter->setPen(QPen(QColor(0, 0, 0, 25), penSize));
307 painter->drawLine(calcRadialPos(option, qreal(0.90)), calcRadialPos(option, qreal(0.96)));
308 }
309
310 painter->setBrush(dialGradient);
311 painter->setPen(QColor(255, 255, 255, 150));
312 painter->drawEllipse(dialRect.adjusted(-1, -1, 1, 1));
313 painter->setPen(QColor(0, 0, 0, 80));
314 painter->drawEllipse(dialRect);
315 painter->restore();
316}
317#endif //QT_NO_DIAL
318
319void drawBorderPixmap(const QPixmap &pixmap, QPainter *painter, const QRect &rect,
320 int left, int top, int right,
321 int bottom)
322{
323 QSize size = pixmap.size();
324 //painter->setRenderHint(QPainter::SmoothPixmapTransform);
325
326 //top
327 if (top > 0) {
328 painter->drawPixmap(QRect(rect.left() + left, rect.top(), rect.width() -right - left, top), pixmap,
329 QRect(left, 0, size.width() -right - left, top));
330
331 //top-left
332 if(left > 0)
333 painter->drawPixmap(QRect(rect.left(), rect.top(), left, top), pixmap,
334 QRect(0, 0, left, top));
335
336 //top-right
337 if (right > 0)
338 painter->drawPixmap(QRect(rect.left() + rect.width() - right, rect.top(), right, top), pixmap,
339 QRect(size.width() - right, 0, right, top));
340 }
341
342 //left
343 if (left > 0)
344 painter->drawPixmap(QRect(rect.left(), rect.top()+top, left, rect.height() - top - bottom), pixmap,
345 QRect(0, top, left, size.height() - bottom - top));
346
347 //center
348 painter->drawPixmap(QRect(rect.left() + left, rect.top()+top, rect.width() -right - left,
349 rect.height() - bottom - top), pixmap,
350 QRect(left, top, size.width() -right -left,
351 size.height() - bottom - top));
352 //right
353 if (right > 0)
354 painter->drawPixmap(QRect(rect.left() +rect.width() - right, rect.top()+top, right, rect.height() - top - bottom), pixmap,
355 QRect(size.width() - right, top, right, size.height() - bottom - top));
356
357 //bottom
358 if (bottom > 0) {
359 painter->drawPixmap(QRect(rect.left() +left, rect.top() + rect.height() - bottom,
360 rect.width() - right - left, bottom), pixmap,
361 QRect(left, size.height() - bottom,
362 size.width() - right - left, bottom));
363 //bottom-left
364 if (left > 0)
365 painter->drawPixmap(QRect(rect.left(), rect.top() + rect.height() - bottom, left, bottom), pixmap,
366 QRect(0, size.height() - bottom, left, bottom));
367
368 //bottom-right
369 if (right > 0)
370 painter->drawPixmap(QRect(rect.left() + rect.width() - right, rect.top() + rect.height() - bottom, right, bottom), pixmap,
371 QRect(size.width() - right, size.height() - bottom, right, bottom));
372
373 }
374}
375}
376QT_END_NAMESPACE
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