feat: Build the custom redraw frame, eg: QScrollBar

搭建自定义QStyle重绘的框架，使用系统自带的和滚动条QScrollBar为示范

QtCustomStyleEx/ExCustomStyle.cpp

@@ -4,7 +4,74 @@ CUSTOMSTYLE_BEDGIN_NAMESPACE
 
 ExCustomStyle::ExCustomStyle()
 {
-
 }
 
+
+//重写重载的函数+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+void ExCustomStyle::drawPrimitive(QStyle::PrimitiveElement pe, const QStyleOption *opt, QPainter *p, const QWidget *w) const
+{
+    QCommonStyle::drawPrimitive(pe, opt, p, w);
+}
+
+void ExCustomStyle::drawControl(QStyle::ControlElement element, const QStyleOption *opt, QPainter *p, const QWidget *w) const
+{
+        switch (element) {
+        //滚动条+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+        case CE_ScrollBarAddPage: {  //增加页(在滑槽)
+            p->fillRect(opt->rect, Qt::green);
+            break;
+        }
+        case CE_ScrollBarSubPage: {  //减少页(在滑槽)
+            p->fillRect(opt->rect, Qt::gray);
+            break;
+        }
+        case CE_ScrollBarSlider: {  //滑块
+            p->fillRect(opt->rect, Qt::red);
+            break;
+        }
+        case CE_ScrollBarAddLine: {  //增加按钮
+            p->fillRect(opt->rect, Qt::blue);
+            break;
+        }
+        case CE_ScrollBarSubLine: {  //减少按钮
+            p->fillRect(opt->rect, Qt::magenta);
+            break;
+        }
+//        case CE_ScrollBarFirst:
+//        case CE_ScrollBarLast: break; //未知
+        //END+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+        default:
+            break;
+        }
+
+    QCommonStyle::drawControl(element, opt, p, w);
+}
+
+QRect ExCustomStyle::subElementRect(QStyle::SubElement subElement, const QStyleOption *option, const QWidget *widget) const
+{
+    return QCommonStyle::subElementRect(subElement, option, widget);
+}
+
+int ExCustomStyle::pixelMetric(QStyle::PixelMetric metric, const QStyleOption *option, const QWidget *widget) const
+{
+    return QCommonStyle::pixelMetric(metric, option, widget);
+}
+
+QSize ExCustomStyle::sizeFromContents(QStyle::ContentsType ct, const QStyleOption *opt, const QSize &contentsSize, const QWidget *w) const
+{
+    return QCommonStyle::sizeFromContents(ct, opt, contentsSize, w);
+}
+
+int ExCustomStyle::styleHint(QStyle::StyleHint stylehint, const QStyleOption *opt, const QWidget *widget, QStyleHintReturn *returnData) const
+{
+    return QCommonStyle::styleHint(stylehint, opt, widget, returnData);
+}
+
+QIcon ExCustomStyle::standardIcon(QStyle::StandardPixmap standardIcon, const QStyleOption *option, const QWidget *widget) const
+{
+    return QCommonStyle::standardIcon(standardIcon, option, widget);
+}
+
+//END+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
 CUSTOMSTYLE_END_NAMESPACE