feat: Create class MyStyle: public QCommonStyle; and most of its overloaded virtual functions (prepared)

QtMyStyleEx/QtExample02/QtStyleEx/QtStyleEx.pro

@@ -46,10 +46,12 @@ CONFIG += c++11
 
 SOURCES += \
         main.cpp \
-        widget.cpp
+        widget.cpp \
+    mystyle.cpp
 
 HEADERS += \
-        widget.h
+        widget.h \
+    mystyle.h
 
 # Default rules for deployment.
 qnx: target.path = /tmp/$${TARGET}/bin

QtMyStyleEx/QtExample02/QtStyleEx/mystyle.cpp

@@ -0,0 +1,83 @@
+/*
+ *
+ * Gmail:   touwoyimuli@gmai.com
+ * blogs:   https://blog.csdn.net/qq_33154343
+ *
+ * -------------------------------------------------
+ * Copyright 2019~2020 touwoyimuli
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mystyle.h"
+
+#include <QDebug>
+
+MyStyle::MyStyle()
+{
+
+}
+
+void MyStyle::polish(QWidget *widget)
+{
+    QCommonStyle::polish(widget);
+}
+
+void MyStyle::unpolish(QWidget *widget)
+{
+    QCommonStyle::unpolish(widget);
+}
+
+void MyStyle::drawPrimitive(QStyle::PrimitiveElement pe, const QStyleOption *opt, QPainter *p, const QWidget *w) const
+{
+    QCommonStyle::drawPrimitive(pe, opt, p, w);
+}
+
+void MyStyle::drawControl(QStyle::ControlElement element, const QStyleOption *opt, QPainter *p, const QWidget *w) const
+{
+    return QCommonStyle::drawControl(element, opt, p, w);
+}
+
+QRect MyStyle::subElementRect(QStyle::SubElement subElement, const QStyleOption *option, const QWidget *widget) const
+{
+    return QCommonStyle::subElementRect(subElement, option, widget);
+}
+
+void MyStyle::drawComplexControl(QStyle::ComplexControl cc, const QStyleOptionComplex *opt, QPainter *p, const QWidget *widget) const
+{
+    QCommonStyle::drawComplexControl(cc, opt, p, widget);
+}
+
+QRect MyStyle::subControlRect(QStyle::ComplexControl cc, const QStyleOptionComplex *opt, QStyle::SubControl sc, const QWidget *widget) const
+{
+    return QCommonStyle::subControlRect(cc, opt, sc, widget);
+}
+
+int MyStyle::pixelMetric(QStyle::PixelMetric metric, const QStyleOption *option, const QWidget *widget) const
+{
+    return QCommonStyle::pixelMetric(metric, option, widget);
+}
+
+QSize MyStyle::sizeFromContents(QStyle::ContentsType ct, const QStyleOption *opt, const QSize &contentsSize, const QWidget *w) const
+{
+    return QCommonStyle::sizeFromContents(ct, opt, contentsSize, w);
+}
+
+int MyStyle::styleHint(QStyle::StyleHint stylehint, const QStyleOption *opt, const QWidget *widget, QStyleHintReturn *returnData) const
+{
+    return QCommonStyle::styleHint(stylehint, opt, widget, returnData);
+}
+
+
+
+

QtMyStyleEx/QtExample02/QtStyleEx/mystyle.h

@@ -0,0 +1,47 @@
+/*
+ *
+ * Gmail:   touwoyimuli@gmai.com
+ * blogs:   https://blog.csdn.net/qq_33154343
+ *
+ * -------------------------------------------------
+ * Copyright 2019~2020 touwoyimuli
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MYSTYLE_H
+#define MYSTYLE_H
+
+#include <QCommonStyle>
+
+class MyStyle : public QCommonStyle
+{
+public:
+    MyStyle();
+
+    // QStyle interface
+public:
+    virtual void polish(QWidget *widget) override;
+    virtual void unpolish(QWidget *widget) override;
+    virtual void drawPrimitive(PrimitiveElement pe, const QStyleOption *opt, QPainter *p, const QWidget *w) const override;
+    virtual void drawControl(ControlElement element, const QStyleOption *opt, QPainter *p, const QWidget *w) const override;
+    virtual QRect subElementRect(SubElement subElement, const QStyleOption *option, const QWidget *widget) const override;
+    virtual void drawComplexControl(ComplexControl cc, const QStyleOptionComplex *opt, QPainter *p, const QWidget *widget) const override;
+    virtual QRect subControlRect(ComplexControl cc, const QStyleOptionComplex *opt, SubControl sc, const QWidget *widget) const override;
+    virtual int pixelMetric(PixelMetric metric, const QStyleOption *option, const QWidget *widget) const override;
+    virtual QSize sizeFromContents(ContentsType ct, const QStyleOption *opt, const QSize &contentsSize, const QWidget *w) const override;
+    virtual int styleHint(StyleHint stylehint, const QStyleOption *opt, const QWidget *widget, QStyleHintReturn *returnData) const override;
+
+};
+
+#endif // MYSTYLE_H

QtMyStyleEx/QtExample02/QtStyleEx/widget.cpp

@@ -20,6 +20,7 @@
  */
 
 #include "widget.h"
+#include "mystyle.h"
 
 #include <QDebug>
 #include <QTableWidget>
@@ -74,7 +75,9 @@ void Widget::init()
 
     int i = 0;
     QStringList listStyle = QStyleFactory::keys();
-    foreach(QString val, listStyle) {   //打印当前系统支持的系统风格
+
+    //显示 and 使用当前系统支持的系统风格
+    foreach(QString val, listStyle) {
         qDebug()<<val<<"  ";
         QPushButton *btn = new QPushButton(val, this);
         btn->move(this->rect().right() - 100, this->rect().top() + i++ * 40);
@@ -83,4 +86,11 @@ void Widget::init()
         });
     }
 
+    //若是自定义风格， new 为对象即可
+    QPushButton *btn = new QPushButton("My Style", this);
+    btn->move(this->rect().right() - 100, this->rect().top() + i++ * 40);
+    connect(btn, &QPushButton::clicked, this, [=](){
+        qApp->setStyle(new MyStyle());
+    });
+
 }