/// <summary>
/// Raises <see cref="ICommand.CanExecuteChanged"/> so every command invoker can requery
/// <see cref="ICommand.CanExecute"/> to check if the <see cref="DelegateCommand{T}"/> can
/// execute.
/// </summary>
protected virtual void OnCanExecuteChanged()
{
CanExecuteChanged?.Invoke(this, EventArgs.Empty);
#else
if (_canExecuteChangedEvent != null && _canExecuteChangedEvent.Count > 0)
{
WindowsHelper.CheckBeginInvokeOnUI(() =>
{
_canExecuteChangedEvent.Invoke(this, EventArgs.Empty);
});
}
}
/// <summary>
/// Called when an exception that is raised by Silverlight is not handled.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="eventArgs">
/// The <see cref="ApplicationUnhandledExceptionEventArgs"/> instance containing the event
/// data.
/// </param>
protected virtual void OnUnhandledException(object sender, ApplicationUnhandledExceptionEventArgs eventArgs)
{
// If the app is running outside of the debugger then report the exception using
// the browser's exception mechanism. On IE this will display it a yellow alert
// icon in the status bar and Firefox will display a script error.
if (!Debugger.IsAttached)
{
// This will allow the application to continue running after an exception has
// been thrown but not handled.
// For production applications this error handling should be replaced with something
// that will report the error to the website and stop the application.
eventArgs.Handled = true;
WindowsHelper.CheckBeginInvokeOnUI(() => ReportErrorToDOM(eventArgs));
}
}
/// <summary>
/// Writes the specified text and the message in the <see cref="BuildEventArgs"/> to the
/// output window.
/// </summary>
private void WriteLine(string text, BuildEventArgs eventArgs)
{
// Copy field into local variable because the closure below should use the
// current indentation value.
int indent = _indent;
WindowsHelper.CheckBeginInvokeOnUI(() =>
{
Debug.Assert(_stringBuilder.Length == 0, "StringBuilder should have been cleared.");
for (int i = 0; i < indent; i++)
{
_stringBuilder.Append(Indentation);
}
_stringBuilder.Append(text);
_stringBuilder.Append(eventArgs.Message);
_outputService.WriteLine(_stringBuilder.ToString());
_stringBuilder.Clear();
});
}
/// <inheritdoc/>
public void Show(string view = null)
{
WindowsHelper.CheckBeginInvokeOnUI(() => ShowUnchecked(view));
}
/// <inheritdoc/>
public void WriteLine(string message, string view = null)
{
WindowsHelper.CheckBeginInvokeOnUI(() => WriteLineUnchecked(message, view), DispatcherPriority.Send);
}
/// <inheritdoc/>
public void Clear(string view = null)
{
WindowsHelper.CheckBeginInvokeOnUI(() => ClearUnchecked(view), DispatcherPriority.Send);
}
