feat: Repaint the skin of a custom control, and the painting is complete

MyStyle has completed, QStylePainter's inheritance rewrite has not yet started

QtMyStyleEx/QtExample03/QtStyleEx/myswitchbutton.cpp

@@ -0,0 +1,69 @@
+#include "myswitchbutton.h"
+#include "myswitchbutton_p.h"
+#include "mystyle.h"
+
+#include <QStylePainter>
+#include <QStyleOptionButton>
+
+MySwitchButton::MySwitchButton(QWidget *parent)
+    : QAbstractButton(parent)
+{
+    Q_D(MySwitchButton);
+
+    d->init();
+}
+
+MySwitchButton::~MySwitchButton()
+{
+
+}
+
+QSize MySwitchButton::sizeHint() const
+{
+    return QSize(100, 40);
+}
+
+void MySwitchButton::paintEvent(QPaintEvent *event)
+{
+    Q_UNUSED(event)
+
+    QStyleOptionButton opt;
+    initStyleOption(&opt);
+
+    QStylePainter pa(this);
+//    pa.drawControl(MyStyle::CE_SwitchButton, opt);
+}
+
+void MySwitchButton::initStyleOption(QStyleOptionButton *opt) const
+{
+    if (!opt)
+        return;
+
+    opt->init(this);
+    opt->initFrom(this);
+
+    if (isChecked())
+        opt->state |= QStyle::State_On;
+    else
+        opt->state |= QStyle::State_Off;
+}
+
+MySwitchButtonPrivate::MySwitchButtonPrivate()
+{
+}
+
+MySwitchButtonPrivate::~MySwitchButtonPrivate()
+{
+
+}
+
+void MySwitchButtonPrivate::init()
+{
+    Q_Q(MySwitchButton);
+
+    checked = false;
+    animationStart = 0;
+    animationEnd = 1;
+    q->setObjectName("MySwitchButton");
+//    q->connect(q, &MySwitchButton::toggled, q, &MySwitchButton::checkedChanged);
+}