]> git.saurik.com Git - wxWidgets.git/blobdiff - src/generic/gridsel.cpp
Can't yet use RegisterDragDrop, RevokeDragDrop on eVC4
[wxWidgets.git] / src / generic / gridsel.cpp
index a4da89168510846132d567d3e7b9ba5ac9cea4f3..17e8f0ecbc5ce261a84bee82d64ec86b4bc03ed6 100644 (file)
@@ -4,7 +4,7 @@
 // Author:      Stefan Neis
 // Modified by:
 // Created:     20/02/1999
-// RCS-ID:      $$
+// RCS-ID:      $Id$
 // Copyright:   (c) Stefan Neis (Stefan.Neis@t-online.de)
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
@@ -17,7 +17,7 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
     #pragma implementation "gridsel.h"
 #endif
 
@@ -30,7 +30,7 @@
     #pragma hdrstop
 #endif
 
-#if defined(wxUSE_NEW_GRID) && (wxUSE_NEW_GRID)
+#if wxUSE_GRID
 
 #include "wx/generic/gridsel.h"
 
@@ -69,7 +69,7 @@ bool wxGridSelection::IsInSelection ( int row, int col )
         {
             wxGridCellCoords& coords = m_cellSelection[n];
             if ( row == coords.GetRow() && col == coords.GetCol() )
-                return true;
+                return TRUE;
         }
     }
 
@@ -83,7 +83,7 @@ bool wxGridSelection::IsInSelection ( int row, int col )
         if ( BlockContainsCell(coords1.GetRow(), coords1.GetCol(),
                                coords2.GetRow(), coords2.GetCol(),
                                row, col ) )
-            return true;
+            return TRUE;
     }
 
     // Now check whether the given cell is
@@ -95,7 +95,7 @@ bool wxGridSelection::IsInSelection ( int row, int col )
         for ( size_t n = 0; n < count; n++ )
         {
             if ( row == m_rowSelection[n] )
-              return true;
+              return TRUE;
         }
     }
 
@@ -108,10 +108,10 @@ bool wxGridSelection::IsInSelection ( int row, int col )
         for ( size_t n = 0; n < count; n++ )
         {
             if ( col == m_colSelection[n] )
-              return true;
+              return TRUE;
         }
     }
-    return false;
+    return FALSE;
 }
 
 // Change the selection mode
@@ -147,9 +147,10 @@ void wxGridSelection::SetSelectionMode(wxGrid::wxGridSelectionModes selmode)
             else // selmode == wxGridSelectColumns)
                 SelectCol( col );
         }
-        while( ( n = m_blockSelectionTopLeft.GetCount() ) > 0)
+
+        for (n = 0; n < m_blockSelectionTopLeft.GetCount(); n++)
+        // Note that m_blockSelectionTopLeft's size may be changing!
         {
-            n--;
             wxGridCellCoords& coords = m_blockSelectionTopLeft[n];
             int topRow = coords.GetRow();
             int leftCol = coords.GetCol();
@@ -163,7 +164,8 @@ void wxGridSelection::SetSelectionMode(wxGrid::wxGridSelectionModes selmode)
                     m_blockSelectionTopLeft.RemoveAt(n);
                     m_blockSelectionBottomRight.RemoveAt(n);
                     SelectBlock( topRow, 0,
-                                 bottomRow, m_grid->GetNumberCols() - 1 );
+                                 bottomRow, m_grid->GetNumberCols() - 1,
+                                 FALSE, FALSE, FALSE, FALSE, FALSE );
                 }
             }
             else // selmode == wxGridSelectColumns)
@@ -173,14 +175,18 @@ void wxGridSelection::SetSelectionMode(wxGrid::wxGridSelectionModes selmode)
                     m_blockSelectionTopLeft.RemoveAt(n);
                     m_blockSelectionBottomRight.RemoveAt(n);
                     SelectBlock( 0, leftCol,
-                                 m_grid->GetNumberRows() - 1, rightCol );
+                                 m_grid->GetNumberRows() - 1, rightCol,
+                                 FALSE, FALSE, FALSE, FALSE, FALSE );
                 }
             }
         }
+        m_selectionMode = selmode;
     }
 }
 
-void wxGridSelection::SelectRow( int row, bool addToSelected )
+void wxGridSelection::SelectRow( int row,
+                                 bool ControlDown,  bool ShiftDown,
+                                 bool AltDown, bool MetaDown )
 {
     if ( m_selectionMode == wxGrid::wxGridSelectColumns )
         return;
@@ -204,7 +210,7 @@ void wxGridSelection::SelectRow( int row, bool addToSelected )
 
     // Simplify list of selected blocks (if possible)
     count = m_blockSelectionTopLeft.GetCount();
-    bool done = false;
+    bool done = FALSE;
     for ( n = 0; n < count; n++ )
     {
         wxGridCellCoords& coords1 = m_blockSelectionTopLeft[n];
@@ -216,7 +222,7 @@ void wxGridSelection::SelectRow( int row, bool addToSelected )
             m_blockSelectionTopLeft.RemoveAt(n);
             m_blockSelectionBottomRight.RemoveAt(n);
             n--; count--;
-        }       
+        }
         else if ( coords1.GetCol() == 0  &&
                   coords2.GetCol() == m_grid->GetNumberCols() - 1 )
         {
@@ -227,13 +233,13 @@ void wxGridSelection::SelectRow( int row, bool addToSelected )
             else if ( coords1.GetRow() == row + 1)
             {
                 coords1.SetRow(row);
-                done = true;
+                done = TRUE;
             }
             else if ( coords2.GetRow() == row - 1)
             {
                 coords2.SetRow(row);
-                done = true;
-            }           
+                done = TRUE;
+            }
         }
     }
 
@@ -258,11 +264,22 @@ void wxGridSelection::SelectRow( int row, bool addToSelected )
     if ( !m_grid->GetBatchCount() )
         ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );
 
-    // Possibly send event here? This would imply that no event is sent,
-    // if the row already was part of the selection.
+    // Send Event
+    wxGridRangeSelectEvent gridEvt( m_grid->GetId(),
+                                    wxEVT_GRID_RANGE_SELECT,
+                                    m_grid,
+                                    wxGridCellCoords( row, 0 ),
+                                    wxGridCellCoords( row, m_grid->GetNumberCols() - 1 ),
+                                    TRUE,
+                                    ControlDown,  ShiftDown,
+                                    AltDown, MetaDown );
+
+    m_grid->GetEventHandler()->ProcessEvent(gridEvt);
 }
 
-void wxGridSelection::SelectCol( int col, bool addToSelected )
+void wxGridSelection::SelectCol( int col,
+                                 bool ControlDown,  bool ShiftDown,
+                                 bool AltDown, bool MetaDown )
 {
     if ( m_selectionMode == wxGrid::wxGridSelectRows )
         return;
@@ -286,7 +303,7 @@ void wxGridSelection::SelectCol( int col, bool addToSelected )
 
     // Simplify list of selected blocks (if possible)
     count = m_blockSelectionTopLeft.GetCount();
-    bool done = false;
+    bool done = FALSE;
     for ( n = 0; n < count; n++ )
     {
         wxGridCellCoords& coords1 = m_blockSelectionTopLeft[n];
@@ -309,13 +326,13 @@ void wxGridSelection::SelectCol( int col, bool addToSelected )
             else if ( coords1.GetCol() == col + 1)
             {
                 coords1.SetCol(col);
-                done = true;
+                done = TRUE;
             }
             else if ( coords2.GetCol() == col - 1)
             {
                 coords2.SetCol(col);
-                done = true;
-            }           
+                done = TRUE;
+            }
         }
     }
 
@@ -340,13 +357,26 @@ void wxGridSelection::SelectCol( int col, bool addToSelected )
     if ( !m_grid->GetBatchCount() )
         ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );
 
-    // Possibly send event here? This would imply that no event is sent,
-    // if the row already was part of the selection.
+    // Send Event
+    wxGridRangeSelectEvent gridEvt( m_grid->GetId(),
+                                    wxEVT_GRID_RANGE_SELECT,
+                                    m_grid,
+                                    wxGridCellCoords( 0, col ),
+                                    wxGridCellCoords( m_grid->GetNumberRows() - 1, col ),
+                                    TRUE,
+                                    ControlDown,  ShiftDown,
+                                    AltDown, MetaDown );
+
+    m_grid->GetEventHandler()->ProcessEvent(gridEvt);
 }
 
-void wxGridSelection::SelectBlock( int topRow, int leftCol, int bottomRow, int rightCol )
+void wxGridSelection::SelectBlock( int topRow, int leftCol,
+                                   int bottomRow, int rightCol,
+                                   bool ControlDown, bool ShiftDown,
+                                   bool AltDown, bool MetaDown,
+                                   bool sendEvent )
 {
-    // Fix the coordinates of the block if potentially needed
+    // Fix the coordinates of the block if needed.
     if ( m_selectionMode == wxGrid::wxGridSelectRows )
     {
         leftCol = 0;
@@ -357,10 +387,28 @@ void wxGridSelection::SelectBlock( int topRow, int leftCol, int bottomRow, int r
         topRow = 0;
         bottomRow = m_grid->GetNumberRows() - 1;
     }
+    if ( topRow > bottomRow )
+    {
+        int temp = topRow;
+        topRow = bottomRow;
+        bottomRow = temp;
+    }
+
+    if ( leftCol > rightCol )
+    {
+        int temp = leftCol;
+        leftCol = rightCol;
+        rightCol = temp;
+    }
 
     // Handle single cell selection in SelectCell.
-    if ( topRow == bottomRow && leftCol == rightCol )
-        SelectCell( topRow, leftCol );
+    // (MB: added check for selection mode here to prevent
+    //  crashes if, for example, we are select rows and the
+    //  grid only has 1 col)
+    if ( m_selectionMode == wxGrid::wxGridSelectCells &&
+         topRow == bottomRow && leftCol == rightCol )
+        SelectCell( topRow, leftCol, ControlDown,  ShiftDown,
+                    AltDown, MetaDown, sendEvent );
 
     size_t count, n;
     // Remove single cells contained in newly selected block.
@@ -429,7 +477,7 @@ void wxGridSelection::SelectBlock( int topRow, int leftCol, int bottomRow, int r
         for ( n = 0; n < count; n++ )
         {
             switch ( BlockContain( 0, m_colSelection[n],
-                                   m_grid->GetNumberRows()-1, m_colSelection[n], 
+                                   m_grid->GetNumberRows()-1, m_colSelection[n],
                                    topRow, leftCol, bottomRow, rightCol ) )
             {
               case 1:
@@ -451,15 +499,38 @@ void wxGridSelection::SelectBlock( int topRow, int leftCol, int bottomRow, int r
     if ( !m_grid->GetBatchCount() )
         ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );
 
-    // Possibly send event?
+    // Send Event, if not disabled.
+    if ( sendEvent )
+    {
+        wxGridRangeSelectEvent gridEvt( m_grid->GetId(),
+                                        wxEVT_GRID_RANGE_SELECT,
+                                        m_grid,
+                                        wxGridCellCoords( topRow, leftCol ),
+                                        wxGridCellCoords( bottomRow, rightCol ),
+                                        TRUE,
+                                        ControlDown, ShiftDown,
+                                        AltDown, MetaDown );
+        m_grid->GetEventHandler()->ProcessEvent(gridEvt);
+    }
 }
 
-void wxGridSelection::SelectCell( int row, int col)
+void wxGridSelection::SelectCell( int row, int col,
+                                  bool ControlDown, bool ShiftDown,
+                                  bool AltDown, bool MetaDown,
+                                  bool sendEvent )
 {
     if ( m_selectionMode == wxGrid::wxGridSelectRows )
-        SelectBlock(row, 0, row, m_grid->GetNumberCols() - 1 );
+    {
+        SelectBlock(row, 0, row, m_grid->GetNumberCols() - 1,
+                    ControlDown, ShiftDown, AltDown, MetaDown, sendEvent);
+        return;
+    }
     else if ( m_selectionMode == wxGrid::wxGridSelectColumns )
-        SelectBlock(0, col, m_grid->GetNumberRows() - 1, col );
+    {
+        SelectBlock(0, col, m_grid->GetNumberRows() - 1, col,
+                    ControlDown, ShiftDown, AltDown, MetaDown, sendEvent);
+        return;
+    }
     else if ( IsInSelection ( row, col ) )
         return;
     m_cellSelection.Add( wxGridCellCoords( row, col ) );
@@ -470,15 +541,30 @@ void wxGridSelection::SelectCell( int row, int col)
     if ( !m_grid->GetBatchCount() )
         ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );
 
-    // Possibly send event?
+    // Send event
+    if (sendEvent)
+    {
+        wxGridRangeSelectEvent gridEvt( m_grid->GetId(),
+                                        wxEVT_GRID_RANGE_SELECT,
+                                        m_grid,
+                                        wxGridCellCoords( row, col ),
+                                        wxGridCellCoords( row, col ),
+                                        TRUE,
+                                        ControlDown, ShiftDown,
+                                        AltDown, MetaDown);
+        m_grid->GetEventHandler()->ProcessEvent(gridEvt);
+    }
 }
 
-void wxGridSelection::ToggleCellSelection( int row, int col)
+void wxGridSelection::ToggleCellSelection( int row, int col,
+                                           bool ControlDown, bool ShiftDown,
+                                           bool AltDown, bool MetaDown )
 {
     // if the cell is not selected, select it
     if ( !IsInSelection ( row, col ) )
     {
-        SelectCell( row, col );
+        SelectCell( row, col, ControlDown, ShiftDown,
+                    AltDown, MetaDown );
         return;
     }
 
@@ -503,9 +589,19 @@ void wxGridSelection::ToggleCellSelection( int row, int col)
                 r = m_grid->BlockToDeviceRect( m_cellSelection[n],
                                                m_cellSelection[n] );
                 m_cellSelection.RemoveAt(n);
-                n--; count--;
                 if ( !m_grid->GetBatchCount() )
                     ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );
+
+                // Send event
+                wxGridRangeSelectEvent gridEvt( m_grid->GetId(),
+                                                wxEVT_GRID_RANGE_SELECT,
+                                                m_grid,
+                                                wxGridCellCoords( row, col ),
+                                                wxGridCellCoords( row, col ),
+                                                FALSE,
+                                                ControlDown, ShiftDown,
+                                                AltDown, MetaDown );
+                m_grid->GetEventHandler()->ProcessEvent(gridEvt);
                 return;
             }
         }
@@ -550,16 +646,20 @@ void wxGridSelection::ToggleCellSelection( int row, int col)
             if ( m_selectionMode != wxGrid::wxGridSelectColumns )
             {
                 if ( topRow < row )
-                    SelectBlock( topRow, leftCol, row - 1, rightCol );
+                    SelectBlock( topRow, leftCol, row - 1, rightCol,
+                                FALSE, FALSE, FALSE, FALSE, FALSE );
                 if ( bottomRow > row )
-                    SelectBlock( row + 1, leftCol, bottomRow, rightCol );
+                    SelectBlock( row + 1, leftCol, bottomRow, rightCol,
+                                FALSE, FALSE, FALSE, FALSE, FALSE );
             }
             if ( m_selectionMode != wxGrid::wxGridSelectRows )
             {
                 if ( leftCol < col )
-                    SelectBlock( row, leftCol, row, col - 1 );
+                    SelectBlock( row, leftCol, row, col - 1,
+                                FALSE, FALSE, FALSE, FALSE, FALSE );
                 if ( rightCol > col )
-                    SelectBlock( row, col + 1, row, rightCol );
+                    SelectBlock( row, col + 1, row, rightCol,
+                                FALSE, FALSE, FALSE, FALSE, FALSE );
             }
         }
     }
@@ -577,9 +677,12 @@ void wxGridSelection::ToggleCellSelection( int row, int col)
                 if (m_selectionMode == wxGrid::wxGridSelectCells)
                 {
                     if ( col > 0 )
-                        SelectBlock( row, 0, row, col - 1 );
+                        SelectBlock( row, 0, row, col - 1,
+                                    FALSE, FALSE, FALSE, FALSE, FALSE );
                     if ( col < m_grid->GetNumberCols() - 1 )
-                        SelectBlock( row, col + 1, row, m_grid->GetNumberCols() - 1 );
+                        SelectBlock( row, col + 1,
+                                     row, m_grid->GetNumberCols() - 1,
+                                     FALSE, FALSE, FALSE, FALSE, FALSE );
                 }
             }
         }
@@ -598,45 +701,84 @@ void wxGridSelection::ToggleCellSelection( int row, int col)
                 if (m_selectionMode == wxGrid::wxGridSelectCells)
                 {
                     if ( row > 0 )
-                        SelectBlock( 0, col, row - 1, col );
+                        SelectBlock( 0, col, row - 1, col,
+                                    FALSE, FALSE, FALSE, FALSE, FALSE );
                     if ( row < m_grid->GetNumberRows() - 1 )
-                        SelectBlock( row + 1, col, m_grid->GetNumberRows() - 1, col );
+                        SelectBlock( row + 1, col,
+                                     m_grid->GetNumberRows() - 1, col,
+                                     FALSE, FALSE, FALSE, FALSE, FALSE );
                 }
             }
         }
     }
 
-    // Refresh the screen; according to m_selectionMode, we
-    // need to either update only the cell, or the whole row/column.
+    // Refresh the screen and send the event; according to m_selectionMode,
+    // we need to either update only the cell, or the whole row/column.
     wxRect r;
     switch (m_selectionMode)
     {
       case wxGrid::wxGridSelectCells:
-        r = m_grid->BlockToDeviceRect( wxGridCellCoords( row, col ),
-                                       wxGridCellCoords( row, col ) );
-        break;
+      {
+          r = m_grid->BlockToDeviceRect( wxGridCellCoords( row, col ),
+                                         wxGridCellCoords( row, col ) );
+          if ( !m_grid->GetBatchCount() )
+              ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );
+          wxGridRangeSelectEvent gridEvt( m_grid->GetId(),
+                                          wxEVT_GRID_RANGE_SELECT,
+                                          m_grid,
+                                          wxGridCellCoords( row, col ),
+                                          wxGridCellCoords( row, col ),
+                                          FALSE,
+                                          ControlDown, ShiftDown,
+                                          AltDown, MetaDown );
+          m_grid->GetEventHandler()->ProcessEvent(gridEvt);
+          break;
+      }
       case wxGrid::wxGridSelectRows:
-        r = m_grid->BlockToDeviceRect( wxGridCellCoords( row, 0 ),
-                                       wxGridCellCoords( row, m_grid->GetNumberCols() - 1 ) );
-        break;
+      {
+          r = m_grid->BlockToDeviceRect( wxGridCellCoords( row, 0 ),
+                                         wxGridCellCoords( row, m_grid->GetNumberCols() - 1 ) );
+          if ( !m_grid->GetBatchCount() )
+              ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );
+          wxGridRangeSelectEvent gridEvt( m_grid->GetId(),
+                                          wxEVT_GRID_RANGE_SELECT,
+                                          m_grid,
+                                          wxGridCellCoords( row, 0 ),
+                                          wxGridCellCoords( row, m_grid->GetNumberCols() - 1 ),
+                                          FALSE,
+                                          ControlDown, ShiftDown,
+                                          AltDown, MetaDown );
+          m_grid->GetEventHandler()->ProcessEvent(gridEvt);
+          break;
+      }
       case wxGrid::wxGridSelectColumns:
-        r = m_grid->BlockToDeviceRect( wxGridCellCoords( 0, col ),
-                                       wxGridCellCoords( m_grid->GetNumberRows() - 1, col ) );
-        break;
+      {
+          r = m_grid->BlockToDeviceRect( wxGridCellCoords( 0, col ),
+                                         wxGridCellCoords( m_grid->GetNumberRows() - 1, col ) );
+          if ( !m_grid->GetBatchCount() )
+              ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );
+          wxGridRangeSelectEvent gridEvt( m_grid->GetId(),
+                                          wxEVT_GRID_RANGE_SELECT,
+                                          m_grid,
+                                          wxGridCellCoords( 0, col ),
+                                          wxGridCellCoords( m_grid->GetNumberRows() - 1, col ),
+                                          FALSE,
+                                          ControlDown, ShiftDown,
+                                          AltDown, MetaDown );
+          m_grid->GetEventHandler()->ProcessEvent(gridEvt);
+          break;
+      }
     }
-    if ( !m_grid->GetBatchCount() )
-        ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );
 }
 
 void wxGridSelection::ClearSelection()
 {
-    // Should this send deselection events?
     size_t n;
 
     // deselect all invidiual cells and update the screen
     if ( m_selectionMode == wxGrid::wxGridSelectCells )
     {
-      
+
         while( ( n = m_cellSelection.GetCount() ) > 0)
         {
             wxRect r;
@@ -659,7 +801,7 @@ void wxGridSelection::ClearSelection()
         m_blockSelectionTopLeft.RemoveAt(n);
         m_blockSelectionBottomRight.RemoveAt(n);
         if ( !m_grid->GetBatchCount() )
-            ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );   
+            ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );
     }
 
     // deselect all rows and update the screen
@@ -674,7 +816,7 @@ void wxGridSelection::ClearSelection()
                                            wxGridCellCoords( row, m_grid->GetNumberCols() - 1 ) );
             m_rowSelection.RemoveAt(n);
             if ( !m_grid->GetBatchCount() )
-                ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );   
+                ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );
         }
     }
 
@@ -690,9 +832,22 @@ void wxGridSelection::ClearSelection()
                                            wxGridCellCoords( m_grid->GetNumberRows() - 1, col ) );
             m_colSelection.RemoveAt(n);
             if ( !m_grid->GetBatchCount() )
-                ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );   
+                ((wxWindow *)m_grid->m_gridWin)->Refresh( FALSE, &r );
         }
     }
+
+    // One deselection event, indicating deselection of _all_ cells.
+    // (No finer grained events for each of the smaller regions
+    //  deselected above!)
+    wxGridRangeSelectEvent gridEvt( m_grid->GetId(),
+                                    wxEVT_GRID_RANGE_SELECT,
+                                    m_grid,
+                                    wxGridCellCoords( 0, 0 ),
+                                    wxGridCellCoords( m_grid->GetNumberRows() - 1,
+                                                      m_grid->GetNumberCols() - 1 ),
+                                    FALSE );
+
+    m_grid->GetEventHandler()->ProcessEvent(gridEvt);
 }
 
 
@@ -754,7 +909,7 @@ void wxGridSelection::UpdateRows( size_t pos, int numRows )
                     coords2.SetRow(row2 + numRows);
                     if ( (size_t) row1 >= pos)
                         coords1.SetRow( wxMax(row1 + numRows, (int) pos) );
-                    
+
                 }
                 else
                 {
@@ -775,29 +930,35 @@ void wxGridSelection::UpdateRows( size_t pos, int numRows )
     count = m_rowSelection.GetCount();
     for ( n = 0; n < count; n++ )
     {
-        int & rowOrCol = m_rowSelection[n];
-        if ( (size_t)rowOrCol >= pos )
-        {
-            if ( numRows > 0 )
-            {
-                // If rows inserted, include row counter where necessary
-                rowOrCol += numRows;
-            }
-            else if ( numRows < 0)
-            {
-                // If rows deleted, either decrement row counter (if row still exists)
-                if ((size_t)rowOrCol >= pos - numRows)
-                    rowOrCol += numRows;
-                else
-                {
-                    m_rowSelection.RemoveAt(n);
-                    n--; count--;
-                }
-            }
-        }
+    int  rowOrCol_ = m_rowSelection [ n ];
+
+      if ( ( size_t ) rowOrCol_ >= pos )
+      {
+          if ( numRows > 0 )
+          {
+              m_rowSelection [ n ] += numRows;
+          }
+          else if ( numRows < 0 )
+          {
+              if ( ( size_t ) rowOrCol_ >= ( pos - numRows ) )
+                  m_rowSelection [ n ] += numRows;
+              else
+              {
+                  m_rowSelection.RemoveAt ( n );
+                  n--;
+                  count--;
+              }
+          }
+      }
     }
+    // No need to touch selected columns, unless we removed _all_
+    // rows, in this case, we remove all columns from the selection.
+
+    if ( !m_grid->GetNumberRows() )
+        m_colSelection.Clear();
 }
 
+
 void wxGridSelection::UpdateCols( size_t pos, int numCols )
 {
     size_t count = m_cellSelection.GetCount();
@@ -856,7 +1017,7 @@ void wxGridSelection::UpdateCols( size_t pos, int numCols )
                     coords2.SetCol(col2 + numCols);
                     if ( (size_t) col1 >= pos)
                         coords1.SetCol( wxMax(col1 + numCols, (int) pos) );
-                    
+
                 }
                 else
                 {
@@ -877,29 +1038,34 @@ void wxGridSelection::UpdateCols( size_t pos, int numCols )
     count = m_colSelection.GetCount();
     for ( n = 0; n < count; n++ )
     {
-        int & rowOrCol = m_colSelection[n];
-        if ( (size_t)rowOrCol >= pos )
+
+      int   rowOrCol = m_colSelection [ n ];
+        if ( ( size_t ) rowOrCol >= pos )
         {
             if ( numCols > 0 )
+                m_colSelection [ n ] += numCols;
+            else if ( numCols < 0 )
             {
-                // If cols inserted, include col counter where necessary
-                rowOrCol += numCols;
-            }
-            else if ( numCols < 0)
-            {
-                // If cols deleted, either decrement col counter (if col still exists)
-                if ((size_t)rowOrCol >= pos - numCols)
-                    rowOrCol += numCols;
+                if ( ( size_t ) rowOrCol >= ( pos -numCols ) )
+                    m_colSelection [ n ] += numCols;
                 else
                 {
-                    m_colSelection.RemoveAt(n);
-                    n--; count--;
+                    m_colSelection.RemoveAt ( n );
+                    n--;
+                    count--;
                 }
             }
         }
+
     }
+
+    // No need to touch selected rows, unless we removed _all_
+    // columns, in this case, we remove all rows from the selection.
+    if ( !m_grid->GetNumberCols() )
+        m_rowSelection.Clear();
 }
 
+
 int wxGridSelection::BlockContain( int topRow1, int leftCol1,
                                    int bottomRow1, int rightCol1,
                                    int topRow2, int leftCol2,