/// <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] uint msg, [In] UIntPtr wparam, [In] IntPtr lparam, [In] IntPtr refData)
{
TaskDialogCallback callback = this.callback;
if (callback != 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.
VistaActiveTaskDialog activeDialog = new VistaActiveTaskDialog(hwnd);
VistaTaskDialogNotificationArgs args = new VistaTaskDialogNotificationArgs();
args.Config = this.config;
args.Notification = (VistaTaskDialogNotification)msg;
switch (args.Notification)
{
case VistaTaskDialogNotification.ButtonClicked:
case VistaTaskDialogNotification.RadioButtonClicked:
args.ButtonId = (int)wparam;
// The index, ideally, should be -1 or something whenever the
//dialog was closed by non-common-button means such as Alt+F4
//or using the Close action on the System menu or the red X
// I can, with little trouble, detect this for the emulated dialog,
//however the native dialog gives me no indication and in fact
//simply reports a buttonId of 2 (Cancel) regardless of whether
//the actual Cancel button was used or one of the above alt methods.
// If I could hook into the native dialogs messages and detect:
// WM_SYSCOMMAND with WParam of SC_CLOSE
// ...then I could tell for sure, but I'm not sure how to listen
//in on its messages. My Win32-fu not good enough.
// For now, I will have the emulated dialog simply pretend like it
//cannot tell either until I can figure out a way to determine it
//with the native dialog, too.
if (args.ButtonId > 100)
args.ButtonIndex = args.ButtonId % 500;
else
args.ButtonIndex = TaskDialog.GetButtonIndexForCommonButton(args.Config.CommonButtons, args.ButtonId);
break;
case VistaTaskDialogNotification.HyperlinkClicked:
args.Hyperlink = Marshal.PtrToStringUni(lparam);
break;
case VistaTaskDialogNotification.Timer:
args.TimerTickCount = (uint)wparam;
break;
case VistaTaskDialogNotification.VerificationClicked:
args.VerificationFlagChecked = (wparam != UIntPtr.Zero);
break;
case VistaTaskDialogNotification.ExpandoButtonClicked:
args.Expanded = (wparam != UIntPtr.Zero);
break;
}
bool result = callback(activeDialog, args, this.callbackData);
return (result ? 1 : 0);
}
return 0; // false;
}
/// <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] uint msg, [In] UIntPtr wparam, [In] IntPtr lparam, [In] IntPtr refData)
{
TaskDialogCallback callback = this.callback;
if (callback != 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.
VistaActiveTaskDialog activeDialog = new VistaActiveTaskDialog(hwnd);
VistaTaskDialogNotificationArgs args = new VistaTaskDialogNotificationArgs();
args.Config = this.config;
args.Notification = (VistaTaskDialogNotification)msg;
switch (args.Notification)
{
case VistaTaskDialogNotification.ButtonClicked:
case VistaTaskDialogNotification.RadioButtonClicked:
args.ButtonId = (int)wparam;
break;
case VistaTaskDialogNotification.HyperlinkClicked:
args.Hyperlink = Marshal.PtrToStringUni(lparam);
break;
case VistaTaskDialogNotification.Timer:
args.TimerTickCount = (uint)wparam;
break;
case VistaTaskDialogNotification.VerificationClicked:
args.VerificationFlagChecked = (wparam != UIntPtr.Zero);
break;
case VistaTaskDialogNotification.ExpandoButtonClicked:
args.Expanded = (wparam != UIntPtr.Zero);
break;
}
bool result = callback(activeDialog, args, this.callbackData);
return (result ? 1 : 0);
}
return 0; // false;
}