protected sealed override void OnClosing(CancelEventArgs cancelArgs)
{
base.OnClosing(cancelArgs);
if (cancelArgs.Cancel)
{
// Base canceled closing because it probably hid and/or minimized the form
ApplicationExiting = true;
}
else
{
bool cancelExit = false;
try {
// Set application exiting if not already done so
if (!ApplicationExiting)
{
ApplicationExiting = true;
}
string cancelReason = string.Empty;
// Ask user to confirm exit
if (ApplicationServices.AskYN("Are you sure you want to exit?"))
{
// Now ask form observers to confirm exit
FireApplicationExitingEvent(cancelArgs);
cancelExit = cancelArgs.Cancel;
// If no aborts, ask framework to confirm exit
if (!cancelExit)
{
Sphere10Framework.Instance.EndWinFormsApplication(out cancelExit, out cancelReason);
}
if (cancelExit)
{
// An observer or framework exit task somewhere has cancelled the exit.
// Ask user to exit anyway
if (ApplicationServices.AskYN(ParagraphBuilder.Combine("The application failed to exit properly",
cancelReason ?? string.Empty,
"You may lose unsaved data if you exit", "Exit anyway?")))
{
// This will force an exit
Exit(true);
}
else
{
cancelArgs.Cancel = true;
}
}
}
else
{
cancelArgs.Cancel = true;
}
} finally {
ApplicationExiting = cancelExit;
}
}
}
