public CommandBarFlyoutToolBar()
{
SetValue(FlyoutTemplateSettingsPropertyKey, new CommandBarFlyoutCommandBarTemplateSettings());
Loaded += delegate
{
UpdateUI();
// Programmatically focus the first primary command if any, else programmatically focus the first secondary command if any.
var commands = PrimaryCommands.Count > 0 ? PrimaryCommands : (SecondaryCommands.Count > 0 ? SecondaryCommands : null);
if (commands != null)
{
bool usingPrimaryCommands = commands == PrimaryCommands;
bool ensureTabStopUniqueness = usingPrimaryCommands || true;
var firstCommandAsFrameworkElement = commands[0] as FrameworkElement;
if (firstCommandAsFrameworkElement != null)
{
if (SharedHelpers.IsFrameworkElementLoaded(firstCommandAsFrameworkElement))
{
FocusCommand(
commands,
usingPrimaryCommands ? m_moreButton : null /*moreButton*/,
true /*firstCommand*/,
ensureTabStopUniqueness);
}
else
{
m_firstItemLoadedRevoker = new RoutedEventHandlerRevoker(
firstCommandAsFrameworkElement,
LoadedEvent,
new RoutedEventHandler(delegate
{
FocusCommand(
commands,
usingPrimaryCommands ? m_moreButton : null /*moreButton*/,
true /*firstCommand*/,
ensureTabStopUniqueness);
m_firstItemLoadedRevoker?.Revoke();
}));
}
}
}
};
Unloaded += delegate
{
StopOpenAnimation();
SetOpacity(1);
};
SizeChanged += delegate
{
UpdateUI();
};
OverflowOpened += delegate
{
m_secondaryItemsRootSized = true;
UpdateFlowsFromAndFlowsTo();
UpdateUI();
};
OverflowClosed += delegate
{
m_secondaryItemsRootSized = false;
if (PrimaryCommands.Count > 0)
{
// Before RS3, ensure the focus goes to a primary command when
// the secondary commands are closed.
EnsureFocusedPrimaryCommand();
}
};
AddHandler(MouseDownEvent, new MouseButtonEventHandler(OnMouseDown), true);
}