//click event
public void UpdateMinCorrectWidth()
{
double result = 0;
if (this.Template.FindName("navMenu", this) is ItemsControl itemsControl && itemsControl.IsLoaded)
{
for (int i = 0; i < itemsControl.Items.Count; i++)
{
ContentPresenter presenter = itemsControl.ItemContainerGenerator.ContainerFromIndex(i) as ContentPresenter;
if (!presenter.IsLoaded)
{
continue;
}
NewNavMenuItem child = VisualTreeHelper.GetChild(presenter, 0) as NewNavMenuItem;
NewNavMenuItem.UpdateMinCorrectWidth(child);
if (child.MinCorrectWidth > result)
{
result = child.MinCorrectWidth;
}
}
}
MinCorrectWidth = result;
}
public static void OnDropdownItemsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (d is NewNavMenuItem nmi)
{
if (nmi.DropdownItems == null || nmi.dropdownMenu == null)
{
return;
}
for (int i = 0; i < nmi.dropdownMenu.Items.Count; i++)
{
ContentPresenter presenter = nmi.dropdownMenu.ItemContainerGenerator.ContainerFromIndex(i) as ContentPresenter;
NewNavMenuItem child = VisualTreeHelper.GetChild(presenter, 0) as NewNavMenuItem;
if (child != null)
{
child.Clicked += (object sender, ClickedEventArgs ee) => { NewNavMenuItem_Clicked(sender, ee, nmi); }
}
;
}
nmi.DropdownItems.CollectionChanged += (object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs ee) => { DropdownItems_CollectionChanged(sender, ee, nmi); };
UpdateMinCorrectWidth(d);
}
}
public static void UpdateMinCorrectWidth(DependencyObject d)
{
if (d is NewNavMenuItem nmi)
{
if (!nmi.IsLoaded)
{
return;
}
double result = 0;
result += nmi.IconMargin.Left;
result += nmi.IconSize;
result += nmi.IconMargin.Right;
result += nmi.TextMargin.Left;
if (nmi.textBlock != null)
{
result += nmi.textBlock.ActualWidth;
}
result += nmi.TextMargin.Right;
result += nmi.DropdownIconMargin.Left;
if (nmi.dropdownIcon != null)
{
result += nmi.dropdownIcon.ActualWidth;
}
result += nmi.DropdownIconMargin.Right;
nmi.MinCorrectWidth = result;
if (nmi.dropdownMenu != null)
{
for (int i = 0; i < nmi.dropdownMenu.Items.Count; i++)
{
ContentPresenter presenter = nmi.dropdownMenu.ItemContainerGenerator.ContainerFromIndex(i) as ContentPresenter;
if (!presenter.IsLoaded)
{
continue;
}
NewNavMenuItem child = VisualTreeHelper.GetChild(presenter, 0) as NewNavMenuItem;
UpdateMinCorrectWidth(child);
if (child.IsLoaded && child.MinCorrectWidth > result)
{
result = child.MinCorrectWidth;
}
}
}
nmi.MinCorrectWidth = result;
}
}
private static void DropdownItems_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e, NewNavMenuItem source)
{
if (sender is ObservableCollection <NavMenuItemData> collection && collection == source.ItemData.DropdownItems)
{
if ((e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Add) || (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Replace))
{
foreach (var el in e.NewItems)
{
if (el is NavMenuItemData data)
{
ContentPresenter presenter = source.dropdownMenu.ItemContainerGenerator.ContainerFromItem(data) as ContentPresenter;
RoutedEventHandler addClickedHandler = (object s, RoutedEventArgs ee) =>
{
NewNavMenuItem child = VisualTreeHelper.GetChild(presenter, 0) as NewNavMenuItem;
if (child != null)
{
child.Clicked += (object sss, ClickedEventArgs eee) => { NewNavMenuItem_Clicked(sss, eee, source); }
}
;
UpdateMinCorrectWidth(source);
};
if (presenter.IsLoaded)
{
addClickedHandler.Invoke(null, null);
}
else
{
presenter.Loaded += addClickedHandler;
}
}
}
}
}
}
private static void ItemData_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e, NewNavMenuItem source)
{
if (sender is NavMenuItemData data)
{
if (source.ItemData != data)
{
return;
}
if (e.PropertyName == "ImageSource" || e.PropertyName == "")
{
try { source.IconSource = new BitmapImage(source.ItemData.ImageSource); } catch { }
}
if (e.PropertyName == "Text" || e.PropertyName == "")
{
source.Text = source.ItemData.Text;
UpdateMinCorrectWidth(source);
}
if (e.PropertyName == "DropdownItems" || e.PropertyName == "")
{
source.DropdownItems = source.ItemData.DropdownItems;
UpdateMinCorrectWidth(source);
}
if (e.PropertyName == "IsDropdownItem" || e.PropertyName == "")
{
source.IsDropdownable = source.ItemData.IsDropdownItem;
UpdateMinCorrectWidth(source);
}
if (e.PropertyName == "IsSelected" || e.PropertyName == "")
{
source.IsSelected = source.ItemData.IsSelected;
}
}
}
private static void NewNavMenuItem_Clicked(object sender, ClickedEventArgs e, NewNavMenuItem source)
{
if (sender is NavMenuItemData data)
{
if (source.ItemData.DropdownItems?.FirstOrDefault(x => x == data) == null)
{
return;
}
source.RaiseClickedEvent(data);
}
}