public static async Task SetCommandBarFlyoutWithExtraContextMenuItems(this ListViewBase ListControl, CommandBarFlyout Flyout, Windows.Foundation.Point?ShowAt = null)
{
if (Flyout == null)
{
throw new ArgumentNullException(nameof(Flyout), "Argument could not be null");
}
if (FullTrustProcessController.Current.IsNowHasAnyActionExcuting)
{
return;
}
try
{
ListControl.ContextFlyout = null;
string SelectedPath;
if (ListControl.SelectedItems.Count <= 1)
{
if (ListControl.SelectedItem is FileSystemStorageItemBase Selected)
{
SelectedPath = Selected.Path;
}
else if (ListControl.FindParentOfType <FileControl>() is FileControl Control)
{
if (!string.IsNullOrEmpty(Control.CurrentFolder?.Path))
{
SelectedPath = Control.CurrentFolder.Path;
}
else
{
return;
}
}
else
{
return;
}
List <ContextMenuItem> ExtraMenuItems = await FullTrustProcessController.Current.GetContextMenuItemsAsync(SelectedPath, Window.Current.CoreWindow.GetKeyState(VirtualKey.Shift).HasFlag(CoreVirtualKeyStates.Down)).ConfigureAwait(true);
if (ExtraMenuItems.Count > 0)
{
if (Flyout.SecondaryCommands.OfType <AppBarElementContainer>().FirstOrDefault() is AppBarElementContainer ExistsContainer)
{
StackPanel InnerPanel = ExistsContainer.Content as StackPanel;
List <ContextMenuItem> MenuExistItems = InnerPanel.Children.Select((Btn) => (Btn as Button).Tag as ContextMenuItem).ToList();
foreach (ContextMenuItem AddItem in ExtraMenuItems.Except(MenuExistItems))
{
Button Btn = await AddItem.GenerateUIButton().ConfigureAwait(true);
Btn.Click += async(s, e) =>
{
Flyout?.Hide();
if (((Button)s)?.Tag is ContextMenuItem MenuItem)
{
await MenuItem.Invoke().ConfigureAwait(true);
}
};
InnerPanel.Children.Add(Btn);
}
foreach (ContextMenuItem RemoveItem in MenuExistItems.Except(ExtraMenuItems))
{
if (InnerPanel.Children.OfType <Button>().FirstOrDefault((Item) => (Item.Tag as ContextMenuItem) == RemoveItem) is Button Btn)
{
InnerPanel.Children.Remove(Btn);
}
}
foreach (ContextMenuItem UpdateItem in MenuExistItems.Where((Item) => ExtraMenuItems.Any((Extra) => Extra.Equals(Item))))
{
UpdateItem.UpdateBelonging(SelectedPath);
}
}
else
{
StackPanel Panel = new StackPanel
{
HorizontalAlignment = HorizontalAlignment.Stretch
};
foreach (ContextMenuItem Item in ExtraMenuItems)
{
Button Btn = await Item.GenerateUIButton().ConfigureAwait(true);
Btn.Click += async(s, e) =>
{
Flyout?.Hide();
if (((Button)s)?.Tag is ContextMenuItem MenuItem)
{
await MenuItem.Invoke().ConfigureAwait(true);
}
};
Panel.Children.Add(Btn);
}
AppBarElementContainer Container = new AppBarElementContainer
{
HorizontalContentAlignment = HorizontalAlignment.Stretch,
Content = Panel
};
List <int> SeparatorGroup = Flyout.SecondaryCommands.Select((Item, Index) => (Index, Item)).Where((Group) => Group.Item is AppBarSeparator).Select((Group) => Group.Index).ToList();
if (SeparatorGroup.Count > 0)
{
Flyout.SecondaryCommands.Insert(SeparatorGroup[0] + 1, new AppBarSeparator());
Flyout.SecondaryCommands.Insert(SeparatorGroup[0] + 1, Container);
}
else
{
Flyout.SecondaryCommands.Insert(0, new AppBarSeparator());
Flyout.SecondaryCommands.Insert(0, Container);
}
}
}
else
{
foreach (AppBarElementContainer ExistContainer in Flyout.SecondaryCommands.OfType <AppBarElementContainer>())
{
Flyout.SecondaryCommands.Remove(ExistContainer);
}
List <int> SeparatorGroup = Flyout.SecondaryCommands.Select((Item, Index) => (Index, Item)).Where((Group) => Group.Item is AppBarSeparator).Select((Group) => Group.Index).ToList();
if (SeparatorGroup.Count == 1)
{
if (SeparatorGroup[0] == 0)
{
Flyout.SecondaryCommands.RemoveAt(0);
}
}
else
{
for (int i = 0; i < SeparatorGroup.Count - 1; i++)
{
if (Math.Abs(SeparatorGroup[i] - SeparatorGroup[i + 1]) == 1)
{
Flyout.SecondaryCommands.RemoveAt(SeparatorGroup[i]);
}
}
}
}
}
}
catch (Exception ex)
{
LogTracer.Log(ex);
}
finally
{
if (ShowAt != null)
{
try
{
FlyoutShowOptions Option = new FlyoutShowOptions
{
Position = ShowAt,
Placement = FlyoutPlacementMode.RightEdgeAlignedTop
};
Flyout?.ShowAt(ListControl, Option);
}
catch (Exception ex)
{
LogTracer.Log(ex, "An exception was threw when trying show flyout");
}
}
else
{
ListControl.ContextFlyout = Flyout;
}
}
}