ElementHost阻止鼠标事件 [英] ElementHost blocks mouse events
问题描述
注意:我正在尝试解决鼠标问题，而不是已经解决的键盘问题
所以我要创建一个Visual Studio 2015扩展，在选项"页面上工作.
So I am creating a Visual Studio 2015 extension, working on the Options pages.
我正在使用WPF，因此我使用ElementHost托管UserControl.起初它没有收到键盘事件，所以我在以下位置实现了解决方案:
I am using WPF, so I use ElementHost to host a UserControl. At first it wasn't receiving keyboard events, so I implemented the solution at:
WPF文本框在输入时不接受输入窗口形式的ElementHost
快速查看解决方案:
A)在UserControl的Loaded事件上，我这样做:
A) on the UserControl's Loaded event, I do:
var s = HwndSource.FromVisual(this) as HwndSource;
s?.AddHook(ChildHwndSourceHook);
B)在ChildHwndSourceHook()中，我做类似的事情:
B) In ChildHwndSourceHook(), I do something like:
static IntPtr ChildHwndSourceHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (msg == WM_GETDLGCODE)
{
handled = true;
return new IntPtr(DLGC_WANTCHARS | DLGC_WANTARROWS | DLGC_HASSETSEL | DLGC_WANTTAB);
}
return IntPtr.Zero;
}
但是，现在鼠标悬停事件似乎被忽略了，因为在文本框或网格拆分器上移动光标时，光标不会发生变化，即使在我创建的新Windows上也是如此.但是，偶尔会，鼠标事件确实起作用，并且一直起作用，直到我移至另一页或关闭对话框为止.那是最奇怪的部分.
HOWEVER, now mouse over events seem to be being ignored, as the cursor doesn't change when moving it over textboxes or grid splitters, not even on new Windows I create. Very occasionally, though, the mouse events do work, though, and continue to work until I move to another page or close the dialog. That's the weirdest part.
我已经尝试了一切，并整日搜寻了Google，但是我还无法理解为什么点击效果很好，但是鼠标悬停事件似乎没有被记录.
I've tried everything and have scoured Google all day, but I am no closer to understanding why clicks work fine, but mouse over events don't seem to be registered.
我确实尝试过删除消息处理程序，然后打开一个窗口，但是似乎一旦添加了处理程序，将其删除将无法解决任何问题.
I did try REMOVING the message handler, then opening a Window, but it seems once the handler is added, removing it won't fix anything.
有人知道我如何将鼠标悬停在事件上以在控件上工作吗?非常感谢！
Does anyone know how I can get mouse over events to work on my controls? Thanks so much!
推荐答案
我已经使用创建者Viasfora使用的方法找到了成功.您可以在 GitHub存储库此处上查看代码.特别是，请查看TextObfuscationDialog及其托管方式.我认为VS扩展文档可能有问题，因为我遇到了与您相同的问题.
I've found success using the method the creator Viasfora used. You can see the code on the GitHub repo here. In particular, look at the TextObfuscationDialog and how it is hosted. I believe there might be something wrong with the VS extension documentation, because I ran into the same problem you did.
我已经创建了一个示例项目来演示此方法是否有效(我现在在自己的2个扩展中使用它).希望此工作代码可以使您更轻松地在自己的项目中实现它.
I've created a sample project to show this method does work (I'm using it in 2 of my own extensions right now). Hopefully this working code might make it easier for you to implement it in your own project.
