// Here we walk our controls collection and
// sort the various controls by type.
private void SortDialogControls()
{
foreach (TaskDialogControl control in controls)
{
TaskDialogButtonBase buttonBase = control as TaskDialogButtonBase;
TaskDialogCommandLink commandLink = control as TaskDialogCommandLink;
if (buttonBase != null && string.IsNullOrEmpty(buttonBase.Text) &&
commandLink != null && string.IsNullOrEmpty(commandLink.Instruction))
{
throw new InvalidOperationException(LocalizedMessages.TaskDialogButtonTextEmpty);
}
TaskDialogRadioButton radButton;
TaskDialogProgressBar progBar;
// Loop through child controls
// and sort the controls based on type.
if (commandLink != null)
{
commandLinks.Add(commandLink);
}
else if ((radButton = control as TaskDialogRadioButton) != null)
{
if (radioButtons == null)
{
radioButtons = new List <TaskDialogButtonBase>();
}
radioButtons.Add(radButton);
}
else if (buttonBase != null)
{
if (buttons == null)
{
buttons = new List <TaskDialogButtonBase>();
}
buttons.Add(buttonBase);
}
else if ((progBar = control as TaskDialogProgressBar) != null)
{
progressBar = progBar;
}
else
{
throw new InvalidOperationException(LocalizedMessages.TaskDialogUnkownControl);
}
}
}
// 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?
TaskDialogStandardButtons buttonClicked = MapButtonIdToStandardButton(id);
// If not, it had better be a custom button...
if (buttonClicked == TaskDialogStandardButtons.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;
e.TaskDialogResult = TaskDialogResult.CustomButtonClicked;
}
else
{
e.TaskDialogResult = (TaskDialogResult)buttonClicked;
}
// 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);
}