/// <summary>
/// We never allow the Workspace property to be null. If
/// a null value is set locally (null is also the default value)
/// then we coerce it to a new instance.
/// </summary>
private object Workspace_CoerceValue(object baseValue)
{
if (baseValue == null)
{
if (Workspace_DefaultValue == null)
{
Workspace_DefaultValue = new MdiDemoWorkspace();
}
return(Workspace_DefaultValue);
}
else
{
// Now that a real instance has been provided (this is not the
// default value), throw away the old default value. We will
// make a new one default value if the property is set back to
// null.
Workspace_DefaultValue = null;
return(baseValue);
}
}
/// <summary>
/// Execute handler for the MdiDemoCommands.NewWorkspace command.
/// </summary>
private void NewWorkspace_Execute(object sender, ExecutedRoutedEventArgs e)
{
Workspace = new MdiDemoWorkspace();
_workspaceFile = null;
}
