Handle mouse wheel input on the row field control.

Only for vertical scrolling at the moment.

2 files changed, 28 insertions, 0 deletions

diff --git a/sc/source/ui/dbgui/fieldwnd.cxx b/sc/source/ui/dbgui/fieldwnd.cxx
index f014c221f690..cf2cbe9a9706 100644
--- a/sc/source/ui/dbgui/fieldwnd.cxx
+++ b/sc/source/ui/dbgui/fieldwnd.cxx
@@ -275,6 +275,20 @@ void ScDPFieldControlBase::DataChanged( const DataChangedEvent& rDCEvt )
     Control::DataChanged( rDCEvt );
 }
 
+void ScDPFieldControlBase::Command( const CommandEvent& rCEvt )
+{
+    if (rCEvt.GetCommand() == COMMAND_WHEEL)
+    {
+        const CommandWheelData* pData = rCEvt.GetWheelData();
+        if (pData->GetMode() == COMMAND_WHEEL_SCROLL && !pData->IsHorz())
+        {
+            // Handle vertical mouse wheel scrolls.
+            long nNotch = pData->GetNotchDelta(); // positive => up; negative => down
+            HandleWheelScroll(nNotch);
+        }
+    }
+}
+
 void ScDPFieldControlBase::MouseButtonDown( const MouseEvent& rMEvt )
 {
     if( rMEvt.IsLeft() )
@@ -896,6 +910,11 @@ void ScDPHorFieldControl::ResetScrollBar()
     }
 }
 
+void ScDPHorFieldControl::HandleWheelScroll(long /*nNotch*/)
+{
+    // not handled for horizontal field controls.
+}
+
 bool ScDPHorFieldControl::GetFieldBtnPosSize(size_t nPos, Point& rPos, Size& rSize)
 {
     if (nPos >= mnFieldBtnColCount*mnFieldBtnRowCount)
@@ -1159,6 +1178,11 @@ void ScDPRowFieldControl::ResetScrollBar()
     }
 }
 
+void ScDPRowFieldControl::HandleWheelScroll(long nNotch)
+{
+    maScroll.DoScroll(maScroll.GetThumbPos() - nNotch);
+}
+
 bool ScDPRowFieldControl::GetFieldBtnPosSize(size_t nPos, Point& rPos, Size& rSize)
 {
     if (nPos >= mnColumnBtnCount)
diff --git a/sc/source/ui/inc/fieldwnd.hxx b/sc/source/ui/inc/fieldwnd.hxx
index f68102184ffe..a8128fc1563b 100644
--- a/sc/source/ui/inc/fieldwnd.hxx
+++ b/sc/source/ui/inc/fieldwnd.hxx
@@ -88,6 +88,7 @@ public:
     virtual void ScrollToShowSelection() = 0;
     virtual void ScrollToEnd() = 0;
     virtual void ResetScrollBar() = 0;
+    virtual void HandleWheelScroll(long nNotch) = 0;
 
     /** Reads the FixedText's text with mnemonic and hides the FixedText. */
     void            UseMnemonic();
@@ -145,6 +146,7 @@ public:
 
     virtual void            Paint( const Rectangle& rRect );
     virtual void            DataChanged( const DataChangedEvent& rDCEvt );
+    virtual void            Command( const CommandEvent& rCEvt );
     virtual void            MouseButtonDown( const MouseEvent& rMEvt );
     virtual void            MouseButtonUp( const MouseEvent& rMEvt );
     virtual void            MouseMove( const MouseEvent& rMEvt );
@@ -257,6 +259,7 @@ public:
     virtual void ScrollToEnd();
     virtual void ScrollToShowSelection();
     virtual void ResetScrollBar();
+    virtual void HandleWheelScroll(long nNotch);
 
 private:
     bool GetFieldBtnPosSize(size_t nPos, Point& rPos, Size& rSize);
@@ -321,6 +324,7 @@ public:
     virtual void ScrollToEnd();
     virtual void ScrollToShowSelection();
     virtual void ResetScrollBar();
+    virtual void HandleWheelScroll(long nNotch);
 
 protected:
     virtual size_t          CalcNewFieldIndex( SCsCOL nDX, SCsROW nDY ) const;