// Gives event subscriber a chance to prevent
// the dialog from closing, based on
// the current state of the app and the button
// used to commit. Note that we don't
// have full access at this stage to
// the full dialog state.
internal int RaiseClosingEvent(int id)
{
EventHandler <TaskDialogClosingEventArgs> handler = Closing;
if (handler != null)
{
TaskDialogButtonBase customButton = null;
TaskDialogClosingEventArgs e = new TaskDialogClosingEventArgs();
// Try to identify the button - is it a standard one?
e.StandardButton = MapButtonIdToStandardButton(id);
// If not, it had better be a custom button...
if (e.StandardButton == TaskDialogStandardButton.None)
{
customButton = GetButtonForId(id);
// ... or we have a problem.
if (customButton == null)
{
throw new InvalidOperationException("Bad button ID in closing event.");
}
e.CustomButton = customButton.Name;
}
// Raise the event and determine how to proceed.
handler(this, e);
if (e.Cancel)
{
return((int)HRESULT.S_FALSE);
}
}
// It's okay to let the dialog close.
return((int)HRESULT.S_OK);
}
private void OnDialogClosing(object sender, TaskDialogClosingEventArgs e)
{
// Can check e.CustomButton and e.StandardButton properties
// to determine whether or not to cancel this Close event.
}
// Gives event subscriber a chance to prevent the dialog from closing, based on
// the current state of the app and the button used to commit. Note that we don't
// have full access at this stage to the full dialog state - particularly
internal int RaiseClosingEvent(int id)
{
EventHandler<TaskDialogClosingEventArgs> handler = Closing;
if (handler != null)
{
TaskDialogButtonBase customButton = null;
TaskDialogClosingEventArgs e = new TaskDialogClosingEventArgs();
// Try to identify the button - is it a standard one?
e.StandardButton = MapButtonIdToStandardButton(id);
// If not, it had better be a custom button ...
if (e.StandardButton == TaskDialogStandardButton.None)
{
customButton = GetButtonForId(id);
// ... or we have a problem
if (customButton == null)
throw new InvalidOperationException("Bad button ID in closing event");
e.CustomButton = customButton.Name;
}
// Raise the event and determine how to proceed
handler(this, e);
if (e.Cancel)
return (int)HRESULT.S_FALSE;
}
// It's okay to let the dialog close
return (int)HRESULT.S_OK;
}
private void OnDialogClosing(object sender, TaskDialogClosingEventArgs e)
{
// Any button clicks are considered a "commit" by the dialog, unless
// closing is explicitly cancelled
if (e.CustomButton == "increaseButton" || e.CustomButton == "decreaseButton")
e.Cancel = true;
}