feat: 主要是构建自定义的枚举，Qt自带的枚举的扩展

QtCustomStyleEx/ExCustomStyle.cpp

@@ -16,7 +16,7 @@ void ExCustomStyle::drawPrimitive(QStyle::PrimitiveElement pe, const QStyleOptio
 void ExCustomStyle::drawControl(QStyle::ControlElement element, const QStyleOption *opt, QPainter *p, const QWidget *w) const
 {
         switch (element) {
-        //滚动条+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+        //滚动条-------------------------------------
         case CE_ScrollBarAddPage: {  //增加页(在滑槽)
             p->fillRect(opt->rect, Qt::green);
             break;
@@ -27,6 +27,7 @@ void ExCustomStyle::drawControl(QStyle::ControlElement element, const QStyleOpti
         }
         case CE_ScrollBarSlider: {  //滑块
             p->fillRect(opt->rect, Qt::red);
+//            p->setBrush();
             break;
         }
         case CE_ScrollBarAddLine: {  //增加按钮

QtCustomStyleEx/ExCustomStyle.h

@@ -22,16 +22,82 @@ class ExCustomStyle : public QCommonStyle
 public:
     ExCustomStyle();
 
-public:  //重写QCommonStyle重载的函数
-    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 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;
-    virtual QIcon standardIcon(StandardPixmap standardIcon, const QStyleOption *option, const QWidget *widget) const override;
-
 public:
+    enum PrimitiveElement {
+        PE_ItemBackground = QStyle::PE_CustomBase + 1,          //列表项的背景色
+        PE_SwitchButtonGroove,
+        PE_SwitchButtonHandle,
+        PE_CustomBase = QStyle::PE_CustomBase + 0xf00000
+    };
+
+    enum ControlElement {
+        CE_IconButton = QStyle::CE_CustomBase + 1,
+        CE_SwitchButton,
+        CE_CustomBase = QStyle::CE_CustomBase + 0xf00000
+    };
+
+    enum SubElement {
+        SE_IconButtonIcon = QStyle::SE_CustomBase + 1,
+        SE_SwitchButtonGroove,
+        SE_SwitchButtonHandle,
+        SE_CustomBase = QStyle::SE_CustomBase + 0xf00000
+    };
+
+    enum PixelMetric {
+        PM_FocusBorderWidth = QStyle::PM_CustomBase + 1,        //控件焦点状态的边框宽度
+        PM_FrameRadius,
+        PM_CustomBase = QStyle::PM_CustomBase + 0xf00000
+    };
+
+    enum ContentsType {
+        CT_IconButton = QStyle::CT_CustomBase + 1,
+        CT_SwitchButton,
+        CT_CustomBase = QStyle::CT_CustomBase + 0xf00000
+    };
+
+    enum StyleHint {
+        SH_CustomBase = QStyle::SH_CustomBase + 0xf00000
+    };
+
+    enum StandardPixmap {
+        SP_CustomBase = QStyle::SP_CustomBase + 0xf00000
+    };
+
+    /*枚举通过按位 ~ ^ | !来计算得到需要组合
+     * //0b对应的二进制        0x十六进制    对应的十进制
+     *   0b0000 0001       0x0000 0001       1
+     *   0b0000 0010       0x0000 0002       2
+     *   0b0000 0100       0x0000 0004       4
+     *   0b0000 1000       0x0000 0006       8
+     *   0b0001 0000       0x0000 0010      16
+    */
+
+    enum StyleState {
+        SS_NormalState = 0x00000000,
+        SS_HoverState  = 0x00000001,
+        SS_PressState  = 0x00000002,
+    };
+    Q_DECLARE_FLAGS(StateFlags, StyleState)  //而类型定义(typedef)和操作符重载正是宏Q_DECLARE_FLAGS 和 Q_DECLARE_OPERATORS_FOR_FLAGS  (均无关于元对象系统)
+
+
+    //内联函数,然后自己选择是调用静态函数,还是重写的基类的函数
+    inline void drawPrimitive(ExCustomStyle::PrimitiveElement pe, const QStyleOption *opt, QPainter *p, const QWidget *w) const
+    { proxy()->drawPrimitive(static_cast<QStyle::PrimitiveElement>(pe), opt, p, w); }
+
+
+
+    //重写QCommonStyle重载的函数
+    virtual void drawPrimitive(QStyle::PrimitiveElement pe, const QStyleOption *opt, QPainter *p, const QWidget *w) const override;
+    virtual void drawControl(QStyle::ControlElement element, const QStyleOption *opt, QPainter *p, const QWidget *w) const override;
+    virtual QRect subElementRect(QStyle::SubElement subElement, const QStyleOption *option, const QWidget *widget) const override;
+    virtual int pixelMetric(QStyle::PixelMetric metric, const QStyleOption *option, const QWidget *widget) const override;
+    virtual QSize sizeFromContents(QStyle::ContentsType ct, const QStyleOption *opt, const QSize &contentsSize, const QWidget *w) const override;
+    virtual int styleHint(QStyle::StyleHint stylehint, const QStyleOption *opt, const QWidget *widget, QStyleHintReturn *returnData) const override;
+    virtual QIcon standardIcon(QStyle::StandardPixmap standardIcon, const QStyleOption *option, const QWidget *widget) const override;
+
+//    virtual void polish(QPalette &palette) override;        //通常在此函数内指定配色方案，也即配置调色板
+//    virtual void polish(QWidget *widget) override;          //当样式应用到窗口部件时，polish(QWidget*)就会调用,从而允许我们进行最后的定制
+//    virtual void unpolish(QWidget *widget) override;        //当动态改变样式的时候，unpolish就会调用，来撤销polish的影响。polish(QWidget*)一般用做窗口部件的事件过滤器。
 };
 
 CUSTOMSTYLE_END_NAMESPACE