Cocoa WebView on os X不触发鼠标悬停事件，而不必单击并按住鼠标左键 [英] Cocoa WebView on os X not firing mouse hover events without having to click and hold left mouse key

问题描述

我是新的Mac开发，我试图结合使用Cocoa WebView使用QMacCocoaViewContainer。我有视图加载我的HTML文件与多个CSS和JavaScript文件，但我遇到的问题是，鼠标悬停事件不会触发，当用户将鼠标移动视图。

I am new to Mac development and am trying to incorporate the use of a Cocoa WebView using the QMacCocoaViewContainer. I have the view loading my html file with multiple css and javascript files but the issue I am having is that the mouse hover events are not triggered when the user moves the mouse over the view.

我已经确定，如果用户单击并按住鼠标左键并移动鼠标，则会触发事件。我猜这是一个焦点问题，但没有成功解决这个问题。任何帮助将是伟大的

I have identified that if the user clicks and holds the left mouse button and moves the mouse then the events are triggered. I am guessing that it is a focus issue but have had no success in resolving this issue. Any help would be great

推荐答案

我发现一个类似的问题SO：嵌入可可webview到QT应用程序的事件问题，其中有一个答案草拟了。我可以确认在该答案的解决方案工作，但只是暗示。这是我做的：

I found a similar question on SO: Event issue when embed cocoa webview to QT application which has an answer sketched out. I can confirm that the solution in that answer works, but is only hinted at. Here is what I did:

1. 在应用程式中重新导入QApplication :: macEventFilter（）



2. 通过执行

1. Re-implement QApplication::macEventFilter() in your app

2. Disable Alien widgets for your app or for just the QMacNativeCocoaWidget by doing

setAttribute(Qt::WA_PaintOnScreen)

在macEventFilter（）中，检查事件是否为MouseMove事件：

In macEventFilter(), check if the event is a MouseMove event:

NSEvent *e = reinterpret_cast<NSEvent *>(event);
if ([e type] == NSMouseMoved)

如果坐标位于WebView的边界中，然后将MouseMoved通知发送到通知中心：

If so, check if the coordinates are in the bounds of the WebView you have, and then post a MouseMoved notification to the Notification Center:

[[NSNotificationCenter defaultCenter]
          postNotificationName:@"NSMouseMovedNotification" object:nil
          userInfo:[NSDictionary dictionaryWithObject:e forKey:@"NSEvent"]];

检查事件的位置是否在WebView，记住Cocoa坐标的起点在底部，而在Qt（0，0）是左上角！

When checking if the event's position is in your WebView, remember that Cocoa coordinates have the origin at the bottom, while in Qt (0, 0) is top-left!

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