父控件的WPF ContextMenu通过自己的ContextMenu在子控件上打开 [英] WPF ContextMenu of parent control opens on child control with own ContextMenu

问题描述

我在基于Canvas的WPF中制作了一个非常漂亮的NodeGraph，当时我要通过右键单击菜单添加漂亮的功能。

I made a pretty nice NodeGraph in WPF based on Canvas and am at the point where I'm adding nifty features through right-click menus.

这些菜单是上下文相关。意味着右键单击图形的背景将显示图形ContextMenu，而右键单击图形中的节点将显示节点ContextMenu，或者如果该节点具有任何带有菜单的子控件，则这些控件。

These menus are context sensitive. Meaning a right-click on the background of the graph will display the graphs ContextMenu, whereas right-clicking a Node in the graph will display the nodes ContextMenu, or if the node has any child-controls with menus, those.

我已经将这个特殊问题推迟了一段时间，但不能再忽略了。如标题中所述：当我右键单击一个节点时，将显示图形的上下文菜单。如果我禁用了图的上下文菜单，那么一个节点就会显示的很好。

I have been postponing this particular issue for a while now but can no longer ignore it. As stated in the title: When I right-click a node, the context-menu of the graph will show. If I disable the context-menu of the graph, the nodes one shows up just fine.

这使我相信这是父控件优先于打开的问题上下文菜单。我已经尝试在父控件和子控件中覆盖鼠标事件并将它们设置为处理，但我只是想不通！

This makes me believe this is an issue of the parent control taking precedence in opening a context menu. I have already tried overriding mouse events in both the parent and child controls and setting them to handled, but I just can't figure it out!

有人可以帮我吗？摆脱这个非常烦人的问题？

Could anyone assist me in getting rid of this very annoying issue?

推荐答案

旧的，但以防万一有人落在这里，我可以通过以下方式解决此问题：使用以下技巧。 （在我的案例中，父控件是 Grid ，子控件是 Path ，两者都有各自的上下文菜单）：

Old but just in case someone lands here, I was able to solve this problem by using the following trick. (Parent control in my case is a Grid and child control is a Path, both of which have their own context menu):

i。不要将 ContextMenu 分配给父控件。而是将其作为资源添加到其资源部分。

i. Do not assign ContextMenu to parent control. Instead add it as a resource into its Resources section.

ii。处理父级的 MouseRightButtonDown 事件，并将以下代码放入其处理程序：

ii. Handle parent's MouseRightButtonDown event and put the following code in its handler:

if (!(e.OriginalSource is Path)) //Or whatever is the type of child control
{
  var cmnu = this.FindResource("ParentContextMenu") as ContextMenu;
  cmnu.IsOpen = true;
}

iii。将 ContextMenu 直接分配给您的子控件。

iii. Assign ContextMenu directly to your child control.

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