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39
40#ifndef QSTYLE_P_H
41#define QSTYLE_P_H
42
43#include "private/qobject_p.h"
44#include <QtGui/qguiapplication.h>
45#include <QtWidgets/qstyle.h>
46
47QT_BEGIN_NAMESPACE
48
49//
50// W A R N I N G
51// -------------
52//
53// This file is not part of the Qt API. It exists for the convenience
54// of qstyle_*.cpp. This header file may change from version to version
55// without notice, or even be removed.
56//
57// We mean it.
58//
59
60// Private class
61
62class QStyle;
63
64class QStylePrivate: public QObjectPrivate
65{
66 Q_DECLARE_PUBLIC(QStyle)
67public:
68 inline QStylePrivate()
69 : layoutSpacingIndex(-1), proxyStyle(nullptr) {}
70
71 static bool useFullScreenForPopup();
72
73 mutable int layoutSpacingIndex;
74 QStyle *proxyStyle;
75};
76
77inline QImage styleCacheImage(const QSize &size)
78{
79 const qreal pixelRatio = qApp->devicePixelRatio();
80 QImage cacheImage = QImage(size * pixelRatio, QImage::Format_ARGB32_Premultiplied);
81 cacheImage.setDevicePixelRatio(pixelRatio);
82 return cacheImage;
83}
84
85inline QPixmap styleCachePixmap(const QSize &size)
86{
87 const qreal pixelRatio = qApp->devicePixelRatio();
88 QPixmap cachePixmap = QPixmap(size * pixelRatio);
89 cachePixmap.setDevicePixelRatio(pixelRatio);
90 return cachePixmap;
91}
92
93#define BEGIN_STYLE_PIXMAPCACHE(a) \
94 QRect rect = option->rect; \
95 QPixmap internalPixmapCache; \
96 QImage imageCache; \
97 QPainter *p = painter; \
98 QString unique = QStyleHelper::uniqueName((a), option, option->rect.size()); \
99 int txType = painter->deviceTransform().type() | painter->worldTransform().type(); \
100 bool doPixmapCache = (!option->rect.isEmpty()) \
101 && ((txType <= QTransform::TxTranslate) || (painter->deviceTransform().type() == QTransform::TxScale)); \
102 if (doPixmapCache && QPixmapCache::find(unique, &internalPixmapCache)) { \
103 painter->drawPixmap(option->rect.topLeft(), internalPixmapCache); \
104 } else { \
105 if (doPixmapCache) { \
106 rect.setRect(0, 0, option->rect.width(), option->rect.height()); \
107 imageCache = styleCacheImage(option->rect.size()); \
108 imageCache.fill(0); \
109 p = new QPainter(&imageCache); \
110 }
111
112
113
114#define END_STYLE_PIXMAPCACHE \
115 if (doPixmapCache) { \
116 p->end(); \
117 delete p; \
118 internalPixmapCache = QPixmap::fromImage(imageCache); \
119 painter->drawPixmap(option->rect.topLeft(), internalPixmapCache); \
120 QPixmapCache::insert(unique, internalPixmapCache); \
121 } \
122 }
123
124QT_END_NAMESPACE
125
126#endif //QSTYLE_P_H
127

source code of qtbase/src/widgets/styles/qstyle_p.h