implement basic Thumb widget painting

components/toggle.cpp

@@ -3,6 +3,7 @@
 #include <QPainter>
 #include "toggle.h"
 #include "../lib/rippleoverlay.h"
+#include "../lib/customshadoweffect.h"
 
 Thumb::Thumb(QWidget *parent)
     : QWidget(parent)
@@ -13,10 +14,26 @@ Thumb::~Thumb()
 {
 }
 
+void Thumb::paintEvent(QPaintEvent *event)
+{
+    Q_UNUSED(event)
+
+    QPainter painter(this);
+
+    painter.drawRect(rect());
+
+    const int d = qMin(width(), height());
+
+    painter.drawEllipse(d, d, d/2, d/2);
+}
+
 Toggle::Toggle(QWidget *parent)
     : QAbstractButton(parent),
-      _overlay(new RippleOverlay(this))
+      _overlay(new RippleOverlay(this)),
+      _thumb(new Thumb(this))
 {
+    CustomShadowEffect *effect = new CustomShadowEffect;
+    _thumb->setGraphicsEffect(effect);
 }
 
 Toggle::~Toggle()
@@ -28,6 +45,9 @@ void Toggle::paintEvent(QPaintEvent *event)
     Q_UNUSED(event)
 
     QPainter painter(this);
+
+    painter.drawRect(rect().adjusted(0, 0, -1, -1));
+
     painter.setRenderHint(QPainter::Antialiasing);
 
     const int h = height()/2;
@@ -40,5 +60,4 @@ void Toggle::paintEvent(QPaintEvent *event)
     painter.setPen(Qt::NoPen);
 
     painter.drawRoundedRect(QRect(0, h-h/2, width(), h+h/2), h, h);
-
 }

components/toggle.h

@@ -12,6 +12,9 @@ class Thumb : public QWidget
 public:
     explicit Thumb(QWidget *parent = 0);
     ~Thumb();
+
+protected:
+    void paintEvent(QPaintEvent *event) Q_DECL_OVERRIDE;
 };
 
 class Toggle : public QAbstractButton
@@ -29,6 +32,7 @@ protected:
 
 private:
     RippleOverlay *const _overlay;
+    Thumb         *const _thumb;
 };
 
 #endif // TOGGLE_H