Shift + drag over the start or end handle will move the whole range w…

…ithout changing its width
qgis · Nov 26, 2020 · ac5295c · ac5295c
1 parent aa832aa
commit ac5295c
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Showing 2 changed files with 12 additions and 2 deletions.
diff --git a/src/gui/qgsrangeslider.cpp b/src/gui/qgsrangeslider.cpp
@@ -430,21 +430,29 @@ void QgsRangeSlider::mousePressEvent( QMouseEvent *event )
 
   mPreDragLowerValue = mLowerValue;
   mPreDragUpperValue = mUpperValue;
+  mRangeDragOffset = 0;
 
-  if ( overLowerControl && overUpperControl )
+  if ( ( overLowerControl || overUpperControl ) && event->modifiers() & Qt::ShiftModifier )
+  {
+    mActiveControl = Range; // shift + drag over handle moves the whole range
+    mRangeDragOffset = overUpperControl ? mUpperClickOffset : mLowerClickOffset;
+  }
+  else if ( overLowerControl && overUpperControl )
     mActiveControl = Both;
   else if ( overLowerControl )
     mActiveControl = Lower;
   else if ( overUpperControl )
     mActiveControl = Upper;
   else if ( overSelectedRange )
+  {
     mActiveControl = Range;
+  }
   else
     mActiveControl = None;
 
   if ( mActiveControl != None )
   {
-    mStartDragPos = pixelPosToRangeValue( pick( event->pos() ) );
+    mStartDragPos = pixelPosToRangeValue( pick( event->pos() ) - mRangeDragOffset );
   }
 }
 
@@ -531,6 +539,7 @@ void QgsRangeSlider::mouseMoveEvent( QMouseEvent *event )
 
     case Range:
     {
+      newPosition = pixelPosToRangeValue( pick( event->pos() ) - mRangeDragOffset ) ;
       int delta = newPosition - mStartDragPos;
 
       if ( delta > 0 )

diff --git a/src/gui/qgsrangeslider.h b/src/gui/qgsrangeslider.h
@@ -238,6 +238,7 @@ class GUI_EXPORT QgsRangeSlider : public QWidget
     int mStartDragPos = -1;
     int mLowerClickOffset = 0;
     int mUpperClickOffset = 0;
+    int mRangeDragOffset = 0;
     int mPreDragLowerValue = -1;
     int mPreDragUpperValue = -1;
     Control mHoverControl = None;