Backported various changes from HEAD to fix a couple of bugs, details:

- backported changed ProcessGridCellMouseEvent to fix bug #834929.
        - backported enforcement of column width/row height checking to fix
                bug #832991.
        - backported fix for bug #837656.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@24486 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/grid.cpp

@@ -5302,26 +5302,6 @@ void wxGrid::ProcessGridCellMouseEvent( wxMouseEvent& event )
                 DisableCellEditControl();
                 MakeCellVisible( coords );
 
-                // if this is the second click on this cell then start
-                // the edit control
-                if ( m_waitForSlowClick &&
-                     (coords == m_currentCellCoords) &&
-                     CanEnableCellControl())
-                {
-                    EnableCellEditControl();
-
-                    wxGridCellAttr* attr = GetCellAttr(m_currentCellCoords);
-                    wxGridCellEditor *editor = attr->GetEditor(this,
-                                                               coords.GetRow(),
-                                                               coords.GetCol());
-                    editor->StartingClick();
-                    editor->DecRef();
-                    attr->DecRef();
-
-                    m_waitForSlowClick = FALSE;
-                }
-                else
-                {
                 if ( event.ControlDown() )
                 {
                     if ( m_selection )
@@ -5339,6 +5319,7 @@ void wxGrid::ProcessGridCellMouseEvent( wxMouseEvent& event )
                 }
                 else
                 {
+                    m_waitForSlowClick = m_currentCellCoords == coords && coords != wxGridNoCellCoords;
                     SetCurrentCell( coords );
                     if ( m_selection )
                     {
@@ -5349,8 +5330,6 @@ void wxGrid::ProcessGridCellMouseEvent( wxMouseEvent& event )
                         }
                     }
                 }
-                    m_waitForSlowClick = TRUE;
-                }
             }
         }
     }
@@ -5384,7 +5363,20 @@ void wxGrid::ProcessGridCellMouseEvent( wxMouseEvent& event )
                 m_winCapture = NULL;
             }
 
-            if ( m_selectingTopLeft != wxGridNoCellCoords &&
+            if ( coords == m_currentCellCoords && m_waitForSlowClick && CanEnableCellControl())
+            {
+                ClearSelection();
+                EnableCellEditControl();
+
+                wxGridCellAttr* attr = GetCellAttr(coords);
+                wxGridCellEditor *editor = attr->GetEditor(this, coords.GetRow(), coords.GetCol());
+                editor->StartingClick();
+                editor->DecRef();
+                attr->DecRef();
+
+                m_waitForSlowClick = FALSE;
+            }
+            else if ( m_selectingTopLeft != wxGridNoCellCoords &&
                  m_selectingBottomRight != wxGridNoCellCoords )
             {
                 if ( m_selection )
@@ -5401,12 +5393,12 @@ void wxGrid::ProcessGridCellMouseEvent( wxMouseEvent& event )
 
                 m_selectingTopLeft = wxGridNoCellCoords;
                 m_selectingBottomRight = wxGridNoCellCoords;
-            }
 
                 // Show the edit control, if it has been hidden for
                 // drag-shrinking.
                 ShowCellEditControl();
             }
+        }
         else if ( m_cursorMode == WXGRID_CURSOR_RESIZE_ROW )
         {
             ChangeCursorMode(WXGRID_CURSOR_SELECT_CELL);
@@ -7281,7 +7273,9 @@ bool wxGrid::IsCurrentCellReadOnly() const
 
 bool wxGrid::CanEnableCellControl() const
 {
-    return m_editable && !IsCurrentCellReadOnly();
+    return m_editable && (m_currentCellCoords != wxGridNoCellCoords) &&
+        !IsCurrentCellReadOnly();
+        
 }
 
 bool wxGrid::IsCellEditControlEnabled() const
@@ -7542,7 +7536,10 @@ static int CoordToRowOrCol(int coord, int defaultDist, int minDist,
         if ( coord >= BorderArray[i_max])
         {
             i_min = i_max;
+            if (minDist)
                 i_max = coord / minDist;
+            else
+                i_max =  BorderArray.GetCount() - 1;
         }
         if ( i_max >= BorderArray.GetCount())
             i_max = BorderArray.GetCount() - 1;
@@ -9159,6 +9156,9 @@ void wxGrid::SetRowSize( int row, int height )
 {
     wxCHECK_RET( row >= 0 && row < m_numRows, _T("invalid row index") );
 
+    // See comment in SetColSize
+    if ( height < GetRowMinimalAcceptableHeight()) { return; }
+
     if ( m_rowHeights.IsEmpty() )
     {
         // need to really create the array
@@ -9200,6 +9200,14 @@ void wxGrid::SetColSize( int col, int width )
     wxCHECK_RET( col >= 0 && col < m_numCols, _T("invalid column index") );
 
     // should we check that it's bigger than GetColMinimalWidth(col) here?
+    //                                                                 (VZ)
+    // No, because it is reasonable to assume the library user know's
+    // what he is doing. However whe should test against the weaker
+    // constariant of minimalAcceptableWidth, as this breaks rendering
+    //
+    // This test then fixes sf.net bug #645734 and is needed for #832991
+
+    if ( width < GetColMinimalAcceptableWidth()) { return; }
 
     if ( m_colWidths.IsEmpty() )
     {
@@ -9223,13 +9231,17 @@ void wxGrid::SetColSize( int col, int width )
 
 void wxGrid::SetColMinimalWidth( int col, int width )
 {
+    if (width > GetColMinimalAcceptableWidth()) {
         m_colMinWidths.Put(col, width);
     }
+}
 
 void wxGrid::SetRowMinimalHeight( int row, int width )
 {
+    if (width > GetRowMinimalAcceptableHeight()) {
         m_rowMinHeights.Put(row, width);
     }
+}
 
 int wxGrid::GetColMinimalWidth(int col) const
 {