+ // return the column at the given position or -1 if it is beyond the
+ // rightmost column and put true into onSeparator output parameter if the
+ // position is near the divider at the right end of this column (notice
+ // that this means that we return column 0 even if the position is over
+ // column 1 but close enough to the divider separating it from column 0)
+ unsigned int FindColumnAtPoint(int x, bool *onSeparator = NULL) const;
+
+ // return true if a drag resizing operation is currently in progress
+ bool IsResizing() const;
+
+ // return true if a drag reordering operation is currently in progress
+ bool IsReordering() const;
+
+ // return true if any drag operation is currently in progress
+ bool IsDragging() const { return IsResizing() || IsReordering(); }
+
+ // end any drag operation currently in progress (resizing or reordering)
+ void EndDragging();
+
+ // cancel the drag operation currently in progress and generate an event
+ // about it
+ void CancelDragging();
+
+ // start (if m_colBeingResized is -1) or continue resizing the column
+ //
+ // this generates wxEVT_COMMAND_HEADER_BEGIN_RESIZE/RESIZING events and can
+ // cancel the operation if the user handler decides so
+ void StartOrContinueResizing(unsigned int col, int xPhysical);
+
+ // end the resizing operation currently in progress and generate an event
+ // about it with its cancelled flag set if xPhysical is -1
+ void EndResizing(int xPhysical);
+
+ // same functions as above but for column moving/reordering instead of
+ // resizing
+ void StartReordering(unsigned int col, int xPhysical);
+
+ // returns true if we did drag the column somewhere else or false if we
+ // didn't really move it -- in this case we consider that no reordering
+ // took place and that a normal column click event should be generated
+ bool EndReordering(int xPhysical);
+
+ // constrain the given position to be larger than the start position of the
+ // given column plus its minimal width and return the effective width
+ int ConstrainByMinWidth(unsigned int col, int& xPhysical);
+
+ // update the information displayed while a column is being moved around
+ void UpdateReorderingMarker(int xPhysical);
+
+ // clear any overlaid markers
+ void ClearMarkers();
+
+
+ // number of columns in the control currently
+ unsigned int m_numColumns;
+