/// <summary>
/// The callback from the native Task Dialog. This prepares the friendlier arguments and calls the simplier callback.
/// </summary>
/// <param name="hwnd">The window handle of the Task Dialog that is active.</param>
/// <param name="msg">The notification. A TaskDialogNotification value.</param>
/// <param name="wparam">Specifies additional noitification information. The contents of this parameter depends on the value of the msg parameter.</param>
/// <param name="lparam">Specifies additional noitification information. The contents of this parameter depends on the value of the msg parameter.</param>
/// <param name="refData">Specifies the application-defined value given in the call to TaskDialogIndirect.</param>
/// <returns>A HRESULT. It's not clear in the spec what a failed result will do.</returns>
private int PrivateCallback([In] IntPtr hwnd, [In] TaskDialogNotification msg, [In] UIntPtr wparam, [In] IntPtr lparam, [In] IntPtr refData)
{
TaskDialogCallback cb = this.callback;
if (cb != null)
{
// Prepare arguments for the callback to the user we are insulating from Interop casting sillyness.
// Future: Consider reusing a single ActiveTaskDialog object and mark it as destroyed on the destry notification.
ActiveTaskDialog activeDialog = new ActiveTaskDialog(hwnd);
TaskDialogNotificationArgs args = new TaskDialogNotificationArgs
{
Notification = msg
};
switch (args.Notification)
{
case TaskDialogNotification.ButtonClicked:
case TaskDialogNotification.RadioButtonClicked:
args.ButtonId = (int)wparam;
break;
case TaskDialogNotification.HyperlinkClicked:
args.Hyperlink = Marshal.PtrToStringUni(lparam);
break;
case TaskDialogNotification.Timer:
args.TimerTickCount = (uint)wparam;
break;
case TaskDialogNotification.VerificationClicked:
args.VerificationFlagChecked = (wparam != UIntPtr.Zero);
break;
case TaskDialogNotification.ExpandoButtonClicked:
args.Expanded = (wparam != UIntPtr.Zero);
break;
}
return (cb(activeDialog, args, this.callbackData) ? 1 : 0);
}
return 0; // false;
}
private int PrivateCallback([In] IntPtr hwnd, [In] uint msg, [In] UIntPtr wparam, [In] IntPtr lparam, [In] IntPtr refData)
{
TaskDialogCallback callback = this.callback;
if (callback != null)
{
ActiveTaskDialog activeDialog = new ActiveTaskDialog(hwnd);
TaskDialogNotificationArgs args = new TaskDialogNotificationArgs();
args.Notification = (TaskDialogNotification)msg;
switch (args.Notification)
{
case TaskDialogNotification.ButtonClicked:
case TaskDialogNotification.RadioButtonClicked:
args.ButtonId = (int)wparam;
break;
case TaskDialogNotification.HyperlinkClicked:
args.Hyperlink = Marshal.PtrToStringUni(lparam);
break;
case TaskDialogNotification.Timer:
args.TimerTickCount = (uint)wparam;
break;
case TaskDialogNotification.VerificationClicked:
args.VerificationFlagChecked = (wparam != UIntPtr.Zero);
break;
case TaskDialogNotification.ExpandoButtonClicked:
args.Expanded = (wparam != UIntPtr.Zero);
break;
}
return (callback(activeDialog, args, this.callbackData) ? 1 : 0);
}
return 0;
}