- Main change is the addition of wxGridSelectRowsOrColumns selection mode

(which is still probably buggy, wxGridSelection needs to be reviewed)
- Add XYToCell() overloads returning wxGridCellCoords (instead of modifying the
  argument passed by reference -- where did this come from?) and document them.
- Added GoToCell() which does make the new current cell visible unlike
  SetGridCursor() (which was documented as doing it, but wasn't)
- Changed SetCurrentCell() to only not change the cell if wxEVT_GRID_SELECT_CELL
  it generates is vetoed, not just processed as this seems to make more sense
- Split jumbo (~400 lines) ProcessGridCellMouseEvent() function into chunks
- Add many more comments to make reading this code seem less like puzzle
  solving for the next unfortunate soul to do it


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55746 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/gridsel.h

@@ -44,10 +44,23 @@ public:
                       bool ControlDown = false,  bool ShiftDown = false,
                       bool AltDown = false, bool MetaDown = false,
                       bool sendEvent = true );
+    void SelectBlock( const wxGridCellCoords& topLeft,
+                      const wxGridCellCoords& bottomRight,
+                      bool ControlDown = false,  bool ShiftDown = false,
+                      bool AltDown = false, bool MetaDown = false,
+                      bool sendEvent = true )
+    {
+        SelectBlock(topLeft.GetRow(), topLeft.GetCol(),
+                    bottomRight.GetRow(), bottomRight.GetCol(),
+                    ControlDown, ShiftDown, AltDown, MetaDown,
+                    sendEvent);
+    }
+
     void SelectCell( int row, int col,
                      bool ControlDown = false,  bool ShiftDown = false,
                      bool AltDown = false, bool MetaDown = false,
                      bool sendEvent = true );
+
     void ToggleCellSelection( int row, int col,
                               bool ControlDown = false,
                               bool ShiftDown = false,