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 QtWidgets module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#ifndef QSTYLESHEETSTYLE_P_H
41#define QSTYLESHEETSTYLE_P_H
42
43#include <QtWidgets/private/qtwidgetsglobal_p.h>
44#include "private/qwindowsstyle_p.h"
45
46#ifndef QT_NO_STYLE_STYLESHEET
47
48#include "QtWidgets/qstyleoption.h"
49#include "QtCore/qhash.h"
50#include "QtGui/qevent.h"
51#include "QtCore/qvector.h"
52#include "QtCore/qset.h"
53#include "QtWidgets/qapplication.h"
54#include "private/qcssparser_p.h"
55#include "QtGui/qbrush.h"
56
57QT_BEGIN_NAMESPACE
58
59//
60// W A R N I N G
61// -------------
62//
63// This file is not part of the Qt API. It exists purely as an
64// implementation detail. This header file may change from version to
65// version without notice, or even be removed.
66//
67// We mean it.
68//
69
70class QRenderRule;
71class QAbstractScrollArea;
72class QStyleSheetStylePrivate;
73class QStyleOptionTitleBar;
74
75class Q_AUTOTEST_EXPORT QStyleSheetStyle : public QWindowsStyle
76{
77 typedef QWindowsStyle ParentStyle;
78
79 Q_OBJECT
80public:
81 QStyleSheetStyle(QStyle *baseStyle);
82 ~QStyleSheetStyle();
83
84 void drawComplexControl(ComplexControl cc, const QStyleOptionComplex *opt, QPainter *p,
85 const QWidget *w = nullptr) const override;
86 void drawControl(ControlElement element, const QStyleOption *opt, QPainter *p,
87 const QWidget *w = nullptr) const override;
88 void drawItemPixmap(QPainter *painter, const QRect &rect, int alignment, const QPixmap &pixmap) const override;
89 void drawItemText(QPainter *painter, const QRect& rect, int alignment, const QPalette &pal,
90 bool enabled, const QString& text, QPalette::ColorRole textRole = QPalette::NoRole) const override;
91 void drawPrimitive(PrimitiveElement pe, const QStyleOption *opt, QPainter *p,
92 const QWidget *w = nullptr) const override;
93 QPixmap generatedIconPixmap(QIcon::Mode iconMode, const QPixmap &pixmap,
94 const QStyleOption *option) const override;
95 SubControl hitTestComplexControl(ComplexControl cc, const QStyleOptionComplex *opt,
96 const QPoint &pt, const QWidget *w = nullptr) const override;
97 QRect itemPixmapRect(const QRect &rect, int alignment, const QPixmap &pixmap) const override;
98 QRect itemTextRect(const QFontMetrics &metrics, const QRect &rect, int alignment, bool enabled,
99 const QString &text) const override;
100 int pixelMetric(PixelMetric metric, const QStyleOption *option = nullptr, const QWidget *widget = nullptr) const override;
101 void polish(QWidget *widget) override;
102 void polish(QApplication *app) override;
103 void polish(QPalette &pal) override;
104 QSize sizeFromContents(ContentsType ct, const QStyleOption *opt,
105 const QSize &contentsSize, const QWidget *widget = nullptr) const override;
106 QPalette standardPalette() const override;
107 QIcon standardIcon(StandardPixmap standardIcon, const QStyleOption *opt = nullptr,
108 const QWidget *widget = nullptr) const override;
109 QPixmap standardPixmap(StandardPixmap standardPixmap, const QStyleOption *option = nullptr,
110 const QWidget *w = nullptr ) const override;
111 int layoutSpacing(QSizePolicy::ControlType control1, QSizePolicy::ControlType control2,
112 Qt::Orientation orientation, const QStyleOption *option = nullptr,
113 const QWidget *widget = nullptr) const override;
114 int styleHint(StyleHint sh, const QStyleOption *opt = nullptr, const QWidget *w = nullptr,
115 QStyleHintReturn *shret = nullptr) const override;
116 QRect subElementRect(SubElement r, const QStyleOption *opt, const QWidget *widget = nullptr) const override;
117 QRect subControlRect(ComplexControl cc, const QStyleOptionComplex *opt, SubControl sc,
118 const QWidget *w = nullptr) const override;
119
120 // These functions are called from QApplication/QWidget. Be careful.
121 QStyle *baseStyle() const;
122 void repolish(QWidget *widget);
123 void repolish(QApplication *app);
124
125 void unpolish(QWidget *widget) override;
126 void unpolish(QApplication *app) override;
127
128 QStyle *base;
129 void ref() { ++refcount; }
130 void deref() { Q_ASSERT(refcount > 0); if (!--refcount) delete this; }
131
132 void updateStyleSheetFont(QWidget* w) const;
133 void saveWidgetFont(QWidget* w, const QFont& font) const;
134 void clearWidgetFont(QWidget* w) const;
135
136 bool styleSheetPalette(const QWidget* w, const QStyleOption* opt, QPalette* pal);
137
138protected:
139 bool event(QEvent *e) override;
140
141private:
142 int refcount;
143
144 friend class QRenderRule;
145 int nativeFrameWidth(const QWidget *);
146 QRenderRule renderRule(const QObject *, int, quint64 = 0) const;
147 QRenderRule renderRule(const QObject *, const QStyleOption *, int = 0) const;
148 QSize defaultSize(const QWidget *, QSize, const QRect&, int) const;
149 QRect positionRect(const QWidget *, const QRenderRule&, const QRenderRule&, int,
150 const QRect&, Qt::LayoutDirection) const;
151 QRect positionRect(const QWidget *w, const QRenderRule &rule2, int pe,
152 const QRect &originRect, Qt::LayoutDirection dir) const;
153
154 mutable QCss::Parser parser;
155
156 void setPalette(QWidget *);
157 void unsetPalette(QWidget *);
158 void setProperties(QWidget *);
159 void setGeometry(QWidget *);
160 void unsetStyleSheetFont(QWidget *) const;
161 QVector<QCss::StyleRule> styleRules(const QObject *obj) const;
162 bool hasStyleRule(const QObject *obj, int part) const;
163
164 QHash<QStyle::SubControl, QRect> titleBarLayout(const QWidget *w, const QStyleOptionTitleBar *tb) const;
165
166 QCss::StyleSheet getDefaultStyleSheet() const;
167
168 static Qt::Alignment resolveAlignment(Qt::LayoutDirection, Qt::Alignment);
169 static bool isNaturalChild(const QObject *obj);
170 static QPixmap loadPixmap(const QString &fileName, const QObject *context);
171 bool initObject(const QObject *obj) const;
172public:
173 static int numinstances;
174
175private:
176 Q_DISABLE_COPY_MOVE(QStyleSheetStyle)
177 Q_DECLARE_PRIVATE(QStyleSheetStyle)
178};
179
180class QStyleSheetStyleCaches : public QObject
181{
182 Q_OBJECT
183public Q_SLOTS:
184 void objectDestroyed(QObject *);
185 void styleDestroyed(QObject *);
186public:
187 QHash<const QObject *, QVector<QCss::StyleRule> > styleRulesCache;
188 QHash<const QObject *, QHash<int, bool> > hasStyleRuleCache;
189 typedef QHash<int, QHash<quint64, QRenderRule> > QRenderRules;
190 QHash<const QObject *, QRenderRules> renderRulesCache;
191 QHash<const void *, QCss::StyleSheet> styleSheetCache; // parsed style sheets
192 QSet<const QWidget *> autoFillDisabledWidgets;
193 // widgets with whose palettes and fonts we have tampered:
194 template <typename T>
195 struct Tampered {
196 T oldWidgetValue;
197 uint resolveMask;
198
199 // only call this function on an rvalue *this (it mangles oldWidgetValue)
200 T reverted(T current)
201#ifdef Q_COMPILER_REF_QUALIFIERS
202 &&
203#endif
204 {
205 oldWidgetValue.resolve(oldWidgetValue.resolve() & resolveMask);
206 current.resolve(current.resolve() & ~resolveMask);
207 current.resolve(oldWidgetValue);
208 current.resolve(current.resolve() | oldWidgetValue.resolve());
209 return current;
210 }
211 };
212 QHash<const QWidget *, Tampered<QPalette>> customPaletteWidgets;
213 QHash<const QWidget *, Tampered<QFont>> customFontWidgets;
214};
215template <typename T>
216class QTypeInfo<QStyleSheetStyleCaches::Tampered<T>>
217 : QTypeInfoMerger<QStyleSheetStyleCaches::Tampered<T>, T> {};
218
219
220// Returns a QStyleSheet from the given style.
221inline QStyleSheetStyle* qt_styleSheet(QStyle *style)
222{
223 return qobject_cast<QStyleSheetStyle *>(style);
224}
225
226QT_END_NAMESPACE
227#endif // QT_NO_STYLE_STYLESHEET
228#endif // QSTYLESHEETSTYLE_P_H
229