public static void CheckChangesToClose(this ChildWindow child, System.ComponentModel.CancelEventArgs e)
{
var vmBase = child.DataContext as ViewModel;
if (vmBase != null && vmBase.HasChanges)
{
SaveConfirmation saveConfirmation = new SaveConfirmation();
saveConfirmation.Show();
saveConfirmation.Closed += (s, t) =>
{
ChildWindow w = (ChildWindow)s;
if (w.DialogResult.HasValue && w.DialogResult.Value)
{
child.DialogResult = false;
vmBase.CancelChanges();
}
};
if (e != null)
e.Cancel = true;
}
else
child.DialogResult = false;
}
/// <summary>
/// On tabitem clicked to close, check if it has changes to display a warning message
/// </summary>
/// <param name="sender">ClosableTabItem type</param>
/// <param name="e">The parameter is not used.</param>
void tabItem_CloseClicked(object sender, EventArgs e)
{
ViewModel vmBase;
_closingTabItem = sender as ClosableTabItem;
FrameworkElement fe = _closingTabItem.Content as FrameworkElement;
Type contextType = fe.DataContext.GetType();
vmBase = fe.DataContext as ViewModel;
if (vmBase != null && vmBase.HasChanges)
{
SaveConfirmation saveConfirmation = new SaveConfirmation();
saveConfirmation.Show();
saveConfirmation.Closed += (s, t) =>
{
ChildWindow w = (ChildWindow)s;
if (w.DialogResult.HasValue && w.DialogResult.Value)
{
RemoveTabItem();
}
};
}
else
RemoveTabItem();
}
