1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the examples of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:BSD$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** BSD License Usage
18** Alternatively, you may use this file under the terms of the BSD license
19** as follows:
20**
21** "Redistribution and use in source and binary forms, with or without
22** modification, are permitted provided that the following conditions are
23** met:
24** * Redistributions of source code must retain the above copyright
25** notice, this list of conditions and the following disclaimer.
26** * Redistributions in binary form must reproduce the above copyright
27** notice, this list of conditions and the following disclaimer in
28** the documentation and/or other materials provided with the
29** distribution.
30** * Neither the name of The Qt Company Ltd nor the names of its
31** contributors may be used to endorse or promote products derived
32** from this software without specific prior written permission.
33**
34**
35** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
46**
47** $QT_END_LICENSE$
48**
49****************************************************************************/
50
51#include "norwegianwoodstyle.h"
52
53#include <QComboBox>
54#include <QPainter>
55#include <QPainterPath>
56#include <QPushButton>
57#include <QStyleFactory>
58
59NorwegianWoodStyle::NorwegianWoodStyle() :
60 QProxyStyle(QStyleFactory::create("windows"))
61{
62 setObjectName("NorwegianWood");
63}
64
65//! [0]
66QPalette NorwegianWoodStyle::standardPalette() const
67{
68 if (!m_standardPalette.isBrushSet(cg: QPalette::Disabled, cr: QPalette::Mid)) {
69 QColor brown(212, 140, 95);
70 QColor beige(236, 182, 120);
71 QColor slightlyOpaqueBlack(0, 0, 0, 63);
72
73 QImage backgroundImage(":/images/woodbackground.png");
74 QImage buttonImage(":/images/woodbutton.png");
75 QImage midImage = buttonImage.convertToFormat(f: QImage::Format_RGB32);
76
77 QPainter painter;
78 painter.begin(&midImage);
79 painter.setPen(Qt::NoPen);
80 painter.fillRect(midImage.rect(), color: slightlyOpaqueBlack);
81 painter.end();
82 //! [0]
83
84 //! [1]
85 QPalette palette(brown);
86
87 palette.setBrush(acr: QPalette::BrightText, abrush: Qt::white);
88 palette.setBrush(acr: QPalette::Base, abrush: beige);
89 palette.setBrush(acr: QPalette::Highlight, abrush: Qt::darkGreen);
90 setTexture(palette, role: QPalette::Button, image: buttonImage);
91 setTexture(palette, role: QPalette::Mid, image: midImage);
92 setTexture(palette, role: QPalette::Window, image: backgroundImage);
93
94 QBrush brush = palette.window();
95 brush.setColor(brush.color().darker());
96
97 palette.setBrush(cg: QPalette::Disabled, cr: QPalette::WindowText, brush);
98 palette.setBrush(cg: QPalette::Disabled, cr: QPalette::Text, brush);
99 palette.setBrush(cg: QPalette::Disabled, cr: QPalette::ButtonText, brush);
100 palette.setBrush(cg: QPalette::Disabled, cr: QPalette::Base, brush);
101 palette.setBrush(cg: QPalette::Disabled, cr: QPalette::Button, brush);
102 palette.setBrush(cg: QPalette::Disabled, cr: QPalette::Mid, brush);
103
104 m_standardPalette = palette;
105 }
106
107 return m_standardPalette;
108}
109//! [1]
110
111//! [3]
112void NorwegianWoodStyle::polish(QWidget *widget)
113//! [3] //! [4]
114{
115 if (qobject_cast<QPushButton *>(object: widget)
116 || qobject_cast<QComboBox *>(object: widget))
117 widget->setAttribute(Qt::WA_Hover, on: true);
118}
119//! [4]
120
121//! [5]
122void NorwegianWoodStyle::unpolish(QWidget *widget)
123//! [5] //! [6]
124{
125 if (qobject_cast<QPushButton *>(object: widget)
126 || qobject_cast<QComboBox *>(object: widget))
127 widget->setAttribute(Qt::WA_Hover, on: false);
128}
129//! [6]
130
131//! [7]
132int NorwegianWoodStyle::pixelMetric(PixelMetric metric,
133//! [7] //! [8]
134 const QStyleOption *option,
135 const QWidget *widget) const
136{
137 switch (metric) {
138 case PM_ComboBoxFrameWidth:
139 return 8;
140 case PM_ScrollBarExtent:
141 return QProxyStyle::pixelMetric(metric, option, widget) + 4;
142 default:
143 return QProxyStyle::pixelMetric(metric, option, widget);
144 }
145}
146//! [8]
147
148//! [9]
149int NorwegianWoodStyle::styleHint(StyleHint hint, const QStyleOption *option,
150//! [9] //! [10]
151 const QWidget *widget,
152 QStyleHintReturn *returnData) const
153{
154 switch (hint) {
155 case SH_DitherDisabledText:
156 return int(false);
157 case SH_EtchDisabledText:
158 return int(true);
159 default:
160 return QProxyStyle::styleHint(hint, option, widget, returnData);
161 }
162}
163//! [10]
164
165//! [11]
166void NorwegianWoodStyle::drawPrimitive(PrimitiveElement element,
167//! [11] //! [12]
168 const QStyleOption *option,
169 QPainter *painter,
170 const QWidget *widget) const
171{
172 switch (element) {
173 case PE_PanelButtonCommand:
174 {
175 int delta = (option->state & State_MouseOver) ? 64 : 0;
176 QColor slightlyOpaqueBlack(0, 0, 0, 63);
177 QColor semiTransparentWhite(255, 255, 255, 127 + delta);
178 QColor semiTransparentBlack(0, 0, 0, 127 - delta);
179
180 int x, y, width, height;
181 option->rect.getRect(ax: &x, ay: &y, aw: &width, ah: &height);
182//! [12]
183
184//! [13]
185 QPainterPath roundRect = roundRectPath(rect: option->rect);
186//! [13] //! [14]
187 int radius = qMin(a: width, b: height) / 2;
188//! [14]
189
190//! [15]
191 QBrush brush;
192//! [15] //! [16]
193 bool darker;
194
195 const QStyleOptionButton *buttonOption =
196 qstyleoption_cast<const QStyleOptionButton *>(opt: option);
197 if (buttonOption
198 && (buttonOption->features & QStyleOptionButton::Flat)) {
199 brush = option->palette.window();
200 darker = (option->state & (State_Sunken | State_On));
201 } else {
202 if (option->state & (State_Sunken | State_On)) {
203 brush = option->palette.mid();
204 darker = !(option->state & State_Sunken);
205 } else {
206 brush = option->palette.button();
207 darker = false;
208//! [16] //! [17]
209 }
210//! [17] //! [18]
211 }
212//! [18]
213
214//! [19]
215 painter->save();
216//! [19] //! [20]
217 painter->setRenderHint(hint: QPainter::Antialiasing, on: true);
218//! [20] //! [21]
219 painter->fillPath(path: roundRect, brush);
220//! [21] //! [22]
221 if (darker)
222//! [22] //! [23]
223 painter->fillPath(path: roundRect, brush: slightlyOpaqueBlack);
224//! [23]
225
226//! [24]
227 int penWidth;
228//! [24] //! [25]
229 if (radius < 10)
230 penWidth = 3;
231 else if (radius < 20)
232 penWidth = 5;
233 else
234 penWidth = 7;
235
236 QPen topPen(semiTransparentWhite, penWidth);
237 QPen bottomPen(semiTransparentBlack, penWidth);
238
239 if (option->state & (State_Sunken | State_On))
240 qSwap(value1&: topPen, value2&: bottomPen);
241//! [25]
242
243//! [26]
244 int x1 = x;
245 int x2 = x + radius;
246 int x3 = x + width - radius;
247 int x4 = x + width;
248
249 if (option->direction == Qt::RightToLeft) {
250 qSwap(value1&: x1, value2&: x4);
251 qSwap(value1&: x2, value2&: x3);
252 }
253
254 QPolygon topHalf;
255 topHalf << QPoint(x1, y)
256 << QPoint(x4, y)
257 << QPoint(x3, y + radius)
258 << QPoint(x2, y + height - radius)
259 << QPoint(x1, y + height);
260
261 painter->setClipPath(path: roundRect);
262 painter->setClipRegion(topHalf, op: Qt::IntersectClip);
263 painter->setPen(topPen);
264 painter->drawPath(path: roundRect);
265//! [26] //! [32]
266
267 QPolygon bottomHalf = topHalf;
268 bottomHalf[0] = QPoint(x4, y + height);
269
270 painter->setClipPath(path: roundRect);
271 painter->setClipRegion(bottomHalf, op: Qt::IntersectClip);
272 painter->setPen(bottomPen);
273 painter->drawPath(path: roundRect);
274
275 painter->setPen(option->palette.windowText().color());
276 painter->setClipping(false);
277 painter->drawPath(path: roundRect);
278
279 painter->restore();
280 }
281 break;
282//! [32] //! [33]
283 default:
284//! [33] //! [34]
285 QProxyStyle::drawPrimitive(element, option, painter, widget);
286 }
287}
288//! [34]
289
290//! [35]
291void NorwegianWoodStyle::drawControl(ControlElement element,
292//! [35] //! [36]
293 const QStyleOption *option,
294 QPainter *painter,
295 const QWidget *widget) const
296{
297 switch (element) {
298 case CE_PushButtonLabel:
299 {
300 QStyleOptionButton myButtonOption;
301 const QStyleOptionButton *buttonOption =
302 qstyleoption_cast<const QStyleOptionButton *>(opt: option);
303 if (buttonOption) {
304 myButtonOption = *buttonOption;
305 if (myButtonOption.palette.currentColorGroup()
306 != QPalette::Disabled) {
307 if (myButtonOption.state & (State_Sunken | State_On)) {
308 myButtonOption.palette.setBrush(acr: QPalette::ButtonText,
309 abrush: myButtonOption.palette.brightText());
310 }
311 }
312 }
313 QProxyStyle::drawControl(element, option: &myButtonOption, painter, widget);
314 }
315 break;
316 default:
317 QProxyStyle::drawControl(element, option, painter, widget);
318 }
319}
320//! [36]
321
322//! [37]
323void NorwegianWoodStyle::setTexture(QPalette &palette, QPalette::ColorRole role,
324//! [37] //! [38]
325 const QImage &image)
326{
327 for (int i = 0; i < QPalette::NColorGroups; ++i) {
328 QBrush brush(image);
329 brush.setColor(palette.brush(cg: QPalette::ColorGroup(i), cr: role).color());
330 palette.setBrush(cg: QPalette::ColorGroup(i), cr: role, brush);
331 }
332}
333//! [38]
334
335//! [39]
336QPainterPath NorwegianWoodStyle::roundRectPath(const QRect &rect)
337//! [39] //! [40]
338{
339 int radius = qMin(a: rect.width(), b: rect.height()) / 2;
340 int diam = 2 * radius;
341
342 int x1, y1, x2, y2;
343 rect.getCoords(xp1: &x1, yp1: &y1, xp2: &x2, yp2: &y2);
344
345 QPainterPath path;
346 path.moveTo(x: x2, y: y1 + radius);
347 path.arcTo(rect: QRect(x2 - diam, y1, diam, diam), startAngle: 0.0, arcLength: +90.0);
348 path.lineTo(x: x1 + radius, y: y1);
349 path.arcTo(rect: QRect(x1, y1, diam, diam), startAngle: 90.0, arcLength: +90.0);
350 path.lineTo(x: x1, y: y2 - radius);
351 path.arcTo(rect: QRect(x1, y2 - diam, diam, diam), startAngle: 180.0, arcLength: +90.0);
352 path.lineTo(x: x1 + radius, y: y2);
353 path.arcTo(rect: QRect(x2 - diam, y2 - diam, diam, diam), startAngle: 270.0, arcLength: +90.0);
354 path.closeSubpath();
355 return path;
356}
357//! [40]
358

source code of qtbase/examples/widgets/widgets/styles/norwegianwoodstyle.cpp