don't steal focus back to wxGrid when it hides an editor in the result of losing it (#9844)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@55632 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -128,6 +128,7 @@ All (GUI):
 - Allow period in link anchors in wxHTML.
 - Fixed memory corruption in wxHTML when parsing "&;" in the markup.
 - Fixed event type in EVT_GRID_CMD_COL_MOVE and EVT_GRID_COL_MOVE.
+- wxGrid doesn't steal focus when hiding editor any more (Tom Eckert).
 
 All (Unix):
 

src/generic/grid.cpp

@@ -8590,11 +8590,19 @@ void wxGrid::HideCellEditControl()
 
         wxGridCellAttr *attr = GetCellAttr(row, col);
         wxGridCellEditor *editor = attr->GetEditor(this, row, col);
+        const bool
+            editorHadFocus = wxWindow::FindFocus() == editor->GetControl();
         editor->Show( false );
         editor->DecRef();
         attr->DecRef();
 
-        m_gridWin->SetFocus();
+        // return the focus to the grid itself if the editor had it
+        //
+        // note that we must not do this unconditionally to avoid stealing
+        // focus from the window which just received it if we are hiding the
+        // editor precisely because we lost focus
+        if ( editorHadFocus )
+            m_gridWin->SetFocus();
 
         // refresh whole row to the right
         wxRect rect( CellToRect(row, col) );