NSMenuItem中的自定义NSView不接收鼠标事件 [英] Custom NSView in NSMenuItem not receiving mouse events

问题描述

我有一个NSMenu弹出一个NSStatusItem使用popUpStatusItemMenu。这些NSMenuItems显示一堆不同的链接，每个都与setAction：连接到目标的openLink：方法。这种安排已经工作很长时间了。不幸的是，我最近决定尝试使用NSMenuItem的setView：方法来提供一个更好的方法来处理它。 / slicker接口。基本上，我只是停止设置标题，创建NSMenuItem，然后使用setView：显示自定义视图。这完美地工作，菜单项目看起来不错，显示我的自定义视图。

但是，当用户选择一个菜单项并释放鼠标时， （即openLink：未调用）。如果我只是简单地注释掉setView：调用，然后动作再次工作（当然，菜单项是空白，但动作执行正确）。我的第一个问题是，为什么设置视图打破了NSMenuItem的操作。

没有问题，我想，我会通过检测我的自定义查看并调用我的action方法。我添加了这个方法到我的自定义视图：

   - （void）mouseUp：（NSEvent *）theEvent {
 NSLog （@in mouseUp）; 
} 
  

没有骰子！这个方法从不被调用。

我可以设置跟踪rects和接收mouseEntered：事件。我在我的mouseEntered例程中做了几个测试，如下：

  if（[[self window] ignoresMouseEvents]）{NSLog @忽略鼠标事件）; } 
 else {NSLog（@不忽略鼠标事件）; } 
 if（[[self window] canBecomeKeyWindow]）{dNSLog（（@canBecomeKeyWindow））; } 
 else {NSLog（@not canBecomeKeyWindow）; } 
 if（[[self window] isKeyWindow]）{dNSLog（（@isKeyWindow））; } 
 else {NSLog（@not isKeyWindow）; } 
  

得到以下回应：

 不忽略鼠标事件
 canBecomeKeyWindow 
 not isKeyWindow 
  

$ b b

这是问题吗？ not isKeyWindow？大概这是不好的，因为苹果的文档说如果用户点击一个不在关键窗口中的视图，默认情况下，窗口被提出并使键，但鼠标事件不分派。但是必须有一种方法来检测这些事件。如何？

添加：

  [[self window] makeKeyWindow] ; 
  

没有效果，尽管canBecomeKeyWindow为YES。

p>

 
 code>  - （void）mouseUp：（NSEvent *）event {
 NSMenuItem * mitem = [self enclosingMenuItem]; 
 NSMenu * m = [mitem menu]; 
 [m cancelTracking]; 
 [m performActionForItemAtIndex：[m indexOfItem：mitem]]; 
} 
  

但是我有keyhandling的问题，如果你解决了这个问题，可以去我的问题，帮助我一点。

I have an NSMenu popping out of an NSStatusItem using popUpStatusItemMenu. These NSMenuItems show a bunch of different links, and each one is connected with setAction: to the openLink: method of a target. This arrangement has been working fine for a long time. The user chooses a link from the menu and the openLink: method then deals with it.

Unfortunately, I recently decided to experiment with using NSMenuItem's setView: method to provide a nicer/slicker interface. Basically, I just stopped setting the title, created the NSMenuItem, and then used setView: to display a custom view. This works perfectly, the menu items look great and my custom view is displayed.

However, when the user chooses a menu item and releases the mouse, the action no longer works (i.e., openLink: isn't called). If I just simply comment out the setView: call, then the actions work again (of course, the menu items are blank, but the action is executed properly). My first question, then, is why setting a view breaks the NSMenuItem's action.

No problem, I thought, I'll fix it by detecting the mouseUp event in my custom view and calling my action method from there. I added this method to my custom view:

- (void)mouseUp:(NSEvent *)theEvent {
  NSLog(@"in mouseUp");
  }

No dice! This method is never called.

I can set tracking rects and receive mouseEntered: events, though. I put a few tests in my mouseEntered routine, as follows:

if ([[self window] ignoresMouseEvents]) {  NSLog(@"ignoring mouse events");  }
else {  NSLog(@"not ignoring mouse events");  }
if ([[self window] canBecomeKeyWindow]) {  dNSLog((@"canBecomeKeyWindow"));  }
else {  NSLog(@"not canBecomeKeyWindow");  }
if ([[self window] isKeyWindow]) {  dNSLog((@"isKeyWindow"));  }
else {  NSLog(@"not isKeyWindow");  }

And got the following responses:

not ignoring mouse events
canBecomeKeyWindow
not isKeyWindow

Is this the problem? "not isKeyWindow"? Presumably this isn't good because Apple's docs say "If the user clicks a view that isn’t in the key window, by default the window is brought forward and made key, but the mouse event is not dispatched." But there must be a way do detect these events. HOW?

Adding:

[[self window] makeKeyWindow];

has no effect, despite the fact that canBecomeKeyWindow is YES.

解决方案

Add this method to your custom NSView and it will work fine with mouse events

- (void)mouseUp:(NSEvent*) event {
    NSMenuItem* mitem = [self enclosingMenuItem];
    NSMenu* m = [mitem menu];
    [m cancelTracking];
    [m performActionForItemAtIndex: [m indexOfItem: mitem]];
}

But i'm having problems with keyhandling, if you solved this problem maybe you can go to my question and help me a little bit.

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