private void IsCheckedChanged(DependencyObject o, DependencyProperty p)
{
RadioMenuFlyoutItem radioItem = o as RadioMenuFlyoutItem;
TextBlock stateText;
if (itemStates.TryGetValue(radioItem.Text, out stateText))
{
UpdateTextState(radioItem, stateText);
}
}
private void UpdateMenu <T> (NavigationViewItem navItem, Symbol symbol, NotifyCollectionChangedEventArgs e, SingleSelectionManager <T> manager, T emptyElement = null)
where T : NamedElement
{
var menu = (MenuFlyout)navItem.ContextFlyout;
int sepIndex = menu.Items.IndexOf(menu.Items.OfType <MenuFlyoutSeparator> ().First());
int i;
for (i = 0; i < sepIndex; i++)
{
menu.Items.RemoveAt(0);
}
if (manager.Elements.Count == 0)
{
if (emptyElement != null)
{
menu.Items.Insert(0, new MenuFlyoutItem {
Text = emptyElement.Name,
IsEnabled = false
});
}
return;
}
i = 0;
foreach (T element in manager.Elements)
{
var radio = new Microsoft.UI.Xaml.Controls.RadioMenuFlyoutItem {
DataContext = new SingleSelectionItemViewModel <T> (manager, element),
Icon = new SymbolIcon(symbol)
};
radio.SetBinding(MenuFlyoutItem.TextProperty, new Binding {
Path = new PropertyPath("Name"), Mode = BindingMode.OneTime
});
radio.SetBinding(Microsoft.UI.Xaml.Controls.RadioMenuFlyoutItem.IsCheckedProperty, new Binding {
Path = new PropertyPath(nameof(SingleSelectionItemViewModel <NamedElement> .IsSelected)), Mode = BindingMode.TwoWay
});
menu.Items.Insert(i++, radio);
}
}
public RadioMenuFlyoutItemPage()
{
this.InitializeComponent();
itemStates = new Dictionary <string, TextBlock>();
if (ApiInformation.IsPropertyPresent("Windows.UI.Xaml.Controls.MenuFlyoutItem", "Icon"))
{
IconMenuFlyoutItem.Icon = new SymbolIcon(Symbol.Calendar);
IconRadioMenuFlyoutItem.Icon = new SymbolIcon(Symbol.Calculator);
}
if (ApiInformation.IsPropertyPresent("Windows.UI.Xaml.Controls.Grid", "ColumnSpacing"))
{
InfoGrid.ColumnSpacing = 12;
ItemNames.Spacing = 4;
ItemStates.Spacing = 4;
}
// register all RadioMenuFlyoutItems
foreach (MenuFlyoutItemBase item in ButtonMenuFlyout.Items)
{
if (item is RadioMenuFlyoutItem)
{
RadioMenuFlyoutItem radioItem = item as RadioMenuFlyoutItem;
radioItem.RegisterPropertyChangedCallback(RadioMenuFlyoutItem.IsCheckedProperty, new DependencyPropertyChangedCallback(IsCheckedChanged));
TextBlock nameText = new TextBlock();
nameText.Text = radioItem.Text;
ItemNames.Children.Add(nameText);
TextBlock stateText = new TextBlock();
AutomationProperties.SetName(stateText, radioItem.Text + "State");
UpdateTextState(radioItem, stateText);
ItemStates.Children.Add(stateText);
itemStates.Add(radioItem.Text, stateText);
}
}
}
private void RegisterItem(MenuFlyoutItemBase item)
{
if (item is RadioMenuFlyoutItem)
{
RadioMenuFlyoutItem radioItem = item as RadioMenuFlyoutItem;
radioItem.RegisterPropertyChangedCallback(RadioMenuFlyoutItem.IsCheckedProperty, new DependencyPropertyChangedCallback(IsCheckedChanged));
TextBlock nameText = new TextBlock();
nameText.Text = radioItem.Text;
ItemNames.Children.Add(nameText);
TextBlock stateText = new TextBlock();
AutomationProperties.SetName(stateText, radioItem.Text + "State");
UpdateTextState(radioItem, stateText);
ItemStates.Children.Add(stateText);
itemStates.Add(radioItem.Text, stateText);
}
}
private void UpdateTextState(RadioMenuFlyoutItem item, TextBlock textBlock)
{
textBlock.Text = item.IsChecked ? "Checked" : "Unchecked";
}
