BUG: Dynamically resize ctkCollapsibleButton when the style/font is changed

Libs/Widgets/ctkCollapsibleButton.cpp

@@ -594,3 +594,22 @@ void ctkCollapsibleButton::childEvent(QChildEvent* c)
     }
   QWidget::childEvent(c);
 }
+
+//-----------------------------------------------------------------------------
+bool ctkCollapsibleButton::event(QEvent *event)
+{
+  if (event->type() == QEvent::StyleChange
+      || event->type() == QEvent::FontChange
+#ifdef Q_WS_MAC
+      || event->type() == QEvent::MacSizeChange
+#endif
+      )
+    {
+    this->setContentsMargins(0, this->buttonSizeHint().height(),0 , 0);
+    if (this->collapsed())
+      {
+      this->setMaximumHeight(this->sizeHint().height());
+      }
+    }
+  return QAbstractButton::event(event);
+}

Libs/Widgets/ctkCollapsibleButton.h

@@ -105,13 +105,17 @@ public:
   Qt::Alignment indicatorAlignment()const;
 
   /// 
-  /// Reimplement for internal reasons
+  /// Reimplemented for internal reasons
   virtual QSize minimumSizeHint()const;
 
   /// 
-  /// Reimplement for internal reasons
+  /// Reimplemented for internal reasons
   virtual QSize sizeHint()const;
 
+  /// Reimplemented to update the size of the button in case of font/style
+  /// change
+  virtual bool event(QEvent* event);
+
 signals:
   /// 
   /// Signal emitted when the widget is collapsed or expanded.