silverlight - 禁用组合框中的右键单击 "Silverlight"弹出窗口

Question

你好
我试图摆脱烦人的“关于 Silverlight”上下文菜单，该菜单在您右键单击 Silverlight 应用程序时弹出。我添加了通常的方法:

在 App.xaml

rootVisual.MouseRightButtonDown += ((s, args) => args.Handled = true);


和所有 ChildWindows 相同。
持续存在的问题在于所有“弹出”控件，如组合框和日期选择器日历弹出窗口。在那里我无法摆脱它。我想以一种我可以为整个应用程序隐式的样式处理右键单击。这可能吗？我可以用其他一些聪明的方法解决它吗？

最好的事物
丹尼尔

Answer 1

答案是继承组合框并制作这样的自定义控件:

public class CellaComboBox : ComboBox
{
    public CellaComboBox()
    {
        DropDownOpened += _dropDownOpened;
        DropDownClosed += _dropDownClosed;
    }

    private static void _dropDownClosed(object sender, EventArgs e)
    {
        HandlePopupRightClick(sender, false);
    }

    private static void _dropDownOpened(object sender, EventArgs e)
    {
        HandlePopupRightClick(sender, true);
    }

    private static void HandlePopupRightClick(object sender, bool hook)
    {
        ComboBox box = (ComboBox)sender;
        var popup = box.GetChildElement<Popup>();
        if (popup != null)
        {
            HookPopupEvent(hook, popup);
        }
    }

    static void HookPopupEvent(bool hook, Popup popup)
    {
        if (hook)
        {
            popup.MouseRightButtonDown += popup_MouseRightButtonDown;
            popup.Child.MouseRightButtonDown += popup_MouseRightButtonDown;
        }
        else
        {
            popup.MouseRightButtonDown -= popup_MouseRightButtonDown;
            popup.Child.MouseRightButtonDown -= popup_MouseRightButtonDown;
        }
    }


    static void popup_MouseRightButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
    {
        e.Handled = true;
    }

框架元素的扩展方法如下所示:

public static class FrameworkElementExtensions
{
    public static TType GetChildElement<TType>(this DependencyObject parent) where TType : DependencyObject
    {
        TType result = default(TType);

        if (parent != null)
        {
            result = parent as TType;

            if (result == null)
            {
                for (int childIndex = 0; childIndex < VisualTreeHelper.GetChildrenCount(parent); ++childIndex)
                {
                    var child = VisualTreeHelper.GetChild(parent, childIndex) as FrameworkElement;
                    result = GetChildElement<TType>(child) as TType;
                    if (result != null) return result;
                }
            }
        }

        return result;
    }
}

您需要以相同的方式处理 DatePicker，但您使用 CalenderOpened 和 CalenderClosed 而不是 DropDownOpened 和 DropDownClosed