feat: adds multiple virtual functions inherited from QCommonStyle

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;

QtMyStyleEx/QtExample03/QtStyleEx/QtStyleEx.pro

@@ -0,0 +1,59 @@
+#
+# 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.
+#
+
+#-------------------------------------------------
+#
+# Project created by QtCreator 2020-02-13T22:45:19
+#
+#-------------------------------------------------
+
+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = QtStyleEx
+TEMPLATE = app
+
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+CONFIG += c++11
+
+SOURCES += \
+        main.cpp \
+        widget.cpp \
+    mystyle.cpp
+
+HEADERS += \
+        widget.h \
+    mystyle.h
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target

QtMyStyleEx/QtExample03/QtStyleEx/main.cpp

@@ -0,0 +1,32 @@
+/*
+ *
+ * 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 "widget.h"
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    Widget w;
+    w.show();
+
+    return a.exec();
+}

QtMyStyleEx/QtExample03/QtStyleEx/mystyle.cpp

@@ -0,0 +1,112 @@
+/*
+ *
+ * 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>
+#include <QPainter>
+#include <QStyleOption>
+
+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
+{
+    p->setRenderHint(QPainter::Antialiasing);
+
+    switch (element) {
+    case CE_ScrollBarAddPage: {  //增加滑槽
+        p->fillRect(opt->rect, QColor("#bfe9ff"));
+        return;
+    }
+    case CE_ScrollBarSubPage: {  //减少滑槽
+        p->fillRect(opt->rect, QColor("#EC6EAD"));
+        return;
+    }
+    case CE_ScrollBarSlider: {  //滑块
+        p->fillRect(opt->rect, QColor("#A8BFFF"));
+        return;
+    }
+    case CE_ScrollBarAddLine: {  //增加按钮
+        p->fillRect(opt->rect, QColor("#21d4fd"));
+        return;
+    }
+    case CE_ScrollBarSubLine: {  //减少按钮
+        p->fillRect(opt->rect, QColor("#de6161"));
+        return;
+    }
+    default:
+        break;
+    }
+
+    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/QtExample03/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/QtExample03/QtStyleEx/widget.cpp

@@ -0,0 +1,98 @@
+/*
+ *
+ * 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 "widget.h"
+#include "mystyle.h"
+
+#include <QDebug>
+#include <QTableWidget>
+#include <QProgressBar>
+#include <QPushButton>
+#include <QApplication>
+#include <QSlider>
+#include <QScrollBar>
+#include <QStyleFactory>
+
+Widget::Widget(QWidget *parent)
+    : QWidget(parent)
+{
+    init();
+}
+
+Widget::~Widget()
+{
+
+}
+
+void Widget::init()
+{
+    resize(1000, 600);
+
+    QTableWidget *table = new QTableWidget(10, 10, this);
+    table->move(10, 10);
+
+    QScrollBar *scrollBarH = new QScrollBar(this);
+    scrollBarH->move(300, 50);
+    scrollBarH->setRange(0, 100);
+    scrollBarH->setValue(34);
+    scrollBarH->resize(380, 20);
+    scrollBarH->setOrientation(Qt::Horizontal);
+
+    QScrollBar *scrollBarV = new QScrollBar(this);
+    scrollBarV->move(50, 250);
+    scrollBarV->setRange(0, 100);
+    scrollBarV->setValue(67);
+    scrollBarV->resize(20, 380);
+    scrollBarV->setOrientation(Qt::Vertical);
+
+    QProgressBar* progreH = new QProgressBar(this);
+    progreH->move(300, 100);
+    progreH->resize(250, 40);
+    progreH->setValue(37);
+    progreH->setOrientation(Qt::Horizontal);
+
+    QProgressBar* progreV = new QProgressBar(this);
+    progreV->move(100, 300);
+    progreV->resize(40, 250);
+    progreV->setValue(67);
+    progreV->setOrientation(Qt::Vertical);
+
+    int i = 0;
+    QStringList listStyle = QStyleFactory::keys();
+
+    //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);
+        connect(btn, &QPushButton::clicked, this, [=](){
+            qApp->setStyle(val);
+        });
+    }
+
+    //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());
+    });
+
+}

QtMyStyleEx/QtExample03/QtStyleEx/widget.h

@@ -0,0 +1,38 @@
+/*
+ *
+ * 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 WIDGET_H
+#define WIDGET_H
+
+#include <QWidget>
+
+class Widget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    Widget(QWidget *parent = 0);
+    ~Widget();
+
+    void init();
+};
+
+#endif // WIDGET_H