void mementoCommandUndone( object sender, CommandEndedArgs e )
{
setDirtyFlag( true ) ;
undoButton.Enabled = undoMenuItem.Enabled = e.UndoCount > 0 ;
redoButton.Enabled = redoMenuItem.Enabled = e.RedoCount > 0 ;
redoButton.DropDownItems.Insert( 0, undoButton.DropDownItems[ 0 ] ) ;
}
void mementoCommandEnded( object sender, CommandEndedArgs e )
{
redoButton.DropDownItems.Clear( ) ;
setDirtyFlag( true ) ;
undoButton.Enabled = undoMenuItem.Enabled = e.UndoCount > 0 ;
redoButton.Enabled = redoMenuItem.Enabled = e.RedoCount > 0 ;
var item = new ToolStripMenuItem( e.Command.Description )
{
Tag = e.Command
} ;
undoButton.DropDownItems.Insert( 0, item ) ;
}
