/// <summary>
/// Handles the event when the system queries whether <see cref="StopExecutionCommand"/> can be executed.
/// </summary>
/// <param name="sender">Sender of the event.</param>
/// <param name="e">The <see cref="CanExecuteRoutedEventArgs"/> associated with the event.</param>
private static void CanStopExecution(object sender, CanExecuteRoutedEventArgs e)
{
ExecutionPanel panel = (ExecutionPanel)sender;
if (panel.ViewModel == null)
{
e.CanExecute = false;
}
else
{
e.CanExecute = panel.ViewModel.CanStopExecution();
}
}
/// <summary>
/// Handles the event when the <see cref="ExecutionContext"/> property changes.
/// </summary>
/// <param name="obj">The <see cref="DependencyObject"/> that owns the property.</param>
/// <param name="e">The <see cref="DependencyPropertyChangedEventArgs"/> associated with the event.</param>
private static void OnExecutionContextChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
ExecutionPanel panel = (ExecutionPanel)obj;
if (e.OldValue != null)
{
((ExecutionContext)e.OldValue).PropertyChanged -= panel.ExecutionContext_PropertyChanged;
panel.ViewModel?.Dispose();
}
if (e.NewValue != null)
{
ExecutionContext executionContext = (ExecutionContext)e.NewValue;
panel.ViewModel = new ExecutionPanelViewModel(executionContext);
executionContext.PropertyChanged += panel.ExecutionContext_PropertyChanged;
panel.UpdateCanExecuteProperties();
}
}
