From 90dd4cdf25b344418e77ab03eb4746cea3ce86b5 Mon Sep 17 00:00:00 2001
From: muli <touwoyimuli@gmail.com>
Date: Sun, 16 Feb 2020 16:15:24 +0800
Subject: [PATCH] feat: Overriding the GUI's QScroll control skin

---
 QtMyStyleEx/QtExample02/QtStyleEx/mystyle.cpp | 78 +++++++------------
 QtMyStyleEx/QtExample02/QtStyleEx/mystyle.h   | 10 ---
 QtMyStyleEx/QtExample02/QtStyleEx/widget.cpp  |  2 +
 3 files changed, 31 insertions(+), 59 deletions(-)

diff --git a/QtMyStyleEx/QtExample02/QtStyleEx/mystyle.cpp b/QtMyStyleEx/QtExample02/QtStyleEx/mystyle.cpp
index 9d596b3..832f7ad 100644
--- a/QtMyStyleEx/QtExample02/QtStyleEx/mystyle.cpp
+++ b/QtMyStyleEx/QtExample02/QtStyleEx/mystyle.cpp
@@ -22,62 +22,42 @@
 #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);
-}
-
-
-
-
diff --git a/QtMyStyleEx/QtExample02/QtStyleEx/mystyle.h b/QtMyStyleEx/QtExample02/QtStyleEx/mystyle.h
index acf8031..44874ac 100644
--- a/QtMyStyleEx/QtExample02/QtStyleEx/mystyle.h
+++ b/QtMyStyleEx/QtExample02/QtStyleEx/mystyle.h
@@ -31,17 +31,7 @@ public:
 
     // 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
diff --git a/QtMyStyleEx/QtExample02/QtStyleEx/widget.cpp b/QtMyStyleEx/QtExample02/QtStyleEx/widget.cpp
index 57b1e25..0bf5349 100644
--- a/QtMyStyleEx/QtExample02/QtStyleEx/widget.cpp
+++ b/QtMyStyleEx/QtExample02/QtStyleEx/widget.cpp
@@ -44,6 +44,8 @@ Widget::~Widget()
 
 void Widget::init()
 {
+    resize(1000, 600);
+
     QTableWidget *table = new QTableWidget(10, 10, this);
     table->move(10, 10);