private uint TaskDialogCallback(IntPtr hwnd, uint uNotification, IntPtr wParam, IntPtr lParam, IntPtr dwRefData)
{
Interlocked.Increment(ref _inEventHandler);
try
{
switch( (NativeMethods.TaskDialogNotifications)uNotification )
{
case NativeMethods.TaskDialogNotifications.Created:
_handle = hwnd;
DialogCreated();
OnCreated(EventArgs.Empty);
break;
case NativeMethods.TaskDialogNotifications.Destroyed:
_handle = IntPtr.Zero;
OnDestroyed(EventArgs.Empty);
break;
case NativeMethods.TaskDialogNotifications.Navigated:
DialogCreated();
break;
case NativeMethods.TaskDialogNotifications.HyperlinkClicked:
string url = Marshal.PtrToStringUni(lParam);
OnHyperlinkClicked(new HyperlinkClickedEventArgs(url));
break;
case NativeMethods.TaskDialogNotifications.ButtonClicked:
TaskDialogButton button;
if( _buttonsById.TryGetValue((int)wParam, out button) )
{
TaskDialogItemClickedEventArgs e = new TaskDialogItemClickedEventArgs(button);
OnButtonClicked(e);
if( e.Cancel )
return 1;
}
break;
case NativeMethods.TaskDialogNotifications.VerificationClicked:
IsVerificationChecked = ((int)wParam) == 1;
OnVerificationClicked(EventArgs.Empty);
break;
case NativeMethods.TaskDialogNotifications.RadioButtonClicked:
TaskDialogRadioButton radioButton;
if( _radioButtonsById.TryGetValue((int)wParam, out radioButton) )
{
radioButton.Checked = true; // there's no way to click a radio button without checking it, is there?
TaskDialogItemClickedEventArgs e = new TaskDialogItemClickedEventArgs(radioButton);
OnRadioButtonClicked(e);
}
break;
case NativeMethods.TaskDialogNotifications.Timer:
TimerEventArgs timerEventArgs = new TimerEventArgs(wParam.ToInt32());
OnTimer(timerEventArgs);
return (uint)(timerEventArgs.ResetTickCount ? 1 : 0);
case NativeMethods.TaskDialogNotifications.ExpandoButtonClicked:
OnExpandButtonClicked(new ExpandButtonClickedEventArgs(wParam.ToInt32() != 0));
break;
case NativeMethods.TaskDialogNotifications.Help:
OnHelpRequested(EventArgs.Empty);
break;
}
return 0;
}
finally
{
Interlocked.Decrement(ref _inEventHandler);
if( _updatePending )
UpdateDialog();
}
}
/// <summary>
/// Raises the <see cref="Timer"/> event.
/// </summary>
/// <param name="e">The <see cref="TimerEventArgs"/> containing the data for the event.</param>
protected virtual void OnTimer(TimerEventArgs e)
{
if( Timer != null )
Timer(this, e);
}