Qt: Seek/SoundSlider: handle hijacked released mouse state (fix #8583)

modules/gui/qt4/util/input_slider.cpp

@@ -199,9 +199,9 @@ void SeekSlider::updateBuffering( float f_buffering_ )
     repaint();
 }
 
-void SeekSlider::mouseReleaseEvent( QMouseEvent *event )
+void SeekSlider::processReleasedButton()
 {
-    event->accept();
+    if ( !isSliding && !isJumping ) return;
     isSliding = false;
     bool b_seekPending = seekLimitTimer->isActive();
     seekLimitTimer->stop(); /* We're not sliding anymore: only last seek on release */
@@ -210,11 +210,21 @@ void SeekSlider::mouseReleaseEvent( QMouseEvent *event )
         isJumping = false;
         return;
     }
-    QSlider::mouseReleaseEvent( event );
     if( b_seekPending && isEnabled() )
         updatePos();
 }
 
+void SeekSlider::mouseReleaseEvent( QMouseEvent *event )
+{
+    if ( event->button() != Qt::LeftButton && event->button() != Qt::MidButton )
+    {
+        QSlider::mouseReleaseEvent( event );
+        return;
+    }
+    event->accept();
+    processReleasedButton();
+}
+
 void SeekSlider::mousePressEvent( QMouseEvent* event )
 {
     /* Right-click */
@@ -273,6 +283,12 @@ void SeekSlider::mousePressEvent( QMouseEvent* event )
 
 void SeekSlider::mouseMoveEvent( QMouseEvent *event )
 {
+    if ( ! ( event->buttons() & ( Qt::LeftButton | Qt::MidButton ) ) )
+    {
+        /* Handle button release when mouserelease has been hijacked by popup */
+        processReleasedButton();
+    }
+
     if ( !isEnabled() ) return event->accept();
 
     if( isSliding )
@@ -546,10 +562,8 @@ void SoundSlider::mousePressEvent( QMouseEvent *event )
     }
 }
 
-void SoundSlider::mouseReleaseEvent( QMouseEvent *event )
+void SoundSlider::processReleasedButton()
 {
-    if( event->button() != Qt::RightButton )
-    {
     if( !b_mouseOutside && value() != i_oldvalue )
     {
         emit sliderReleased();
@@ -558,11 +572,20 @@ void SoundSlider::mouseReleaseEvent( QMouseEvent *event )
     }
     isSliding = false;
     b_mouseOutside = false;
-    }
+}
+
+void SoundSlider::mouseReleaseEvent( QMouseEvent *event )
+{
+    if( event->button() != Qt::RightButton )
+        processReleasedButton();
 }
 
 void SoundSlider::mouseMoveEvent( QMouseEvent *event )
 {
+    /* handle mouserelease hijacking */
+    if ( isSliding && ( event->buttons() & ~Qt::RightButton ) == Qt::NoButton )
+        processReleasedButton();
+
     if( isSliding )
     {
         QRect rect( paddingL - 15,    -1,

modules/gui/qt4/util/input_slider.hpp

@@ -71,6 +71,7 @@ protected:
 
     virtual QSize sizeHint() const;
 
+    void processReleasedButton();
     bool isAnimationRunning() const;
     qreal handleOpacity() const;
     void setHandleOpacity( qreal opacity );
@@ -143,6 +144,8 @@ protected:
     virtual void mouseMoveEvent( QMouseEvent * );
     virtual void mouseReleaseEvent( QMouseEvent * );
 
+    void processReleasedButton();
+
 private:
     bool isSliding; /* Whether we are currently sliding by user action */
     bool b_mouseOutside; /* Whether the mouse is outside or inside the Widget */