对NSWindow的内容进行灰色处理。

I have an NSWindow with 2 NSViews (an NSSplitView and a custom NSView). Accessing the data to populate these views can take some time. During this period, I'd like to gray out the content of these views.

我有一个带有两个NSView的NSWindow(一个NSSplitView和一个定制的NSView)。访问数据以填充这些视图需要一些时间。在这段时间里，我想把这些观点的内容变灰。

My first approach was to have a black third NSView that covered the other 2 and achieve the graying out effect by changing its alpha value. However I've since learned having a hierarchy with sibling views is undefined.

我的第一个方法是有一个黑色的第三个NSView，它覆盖了另外两个，通过改变alpha值来实现灰色效果。然而，我已经学会了拥有一个带有兄弟姐妹视图的层次结构是没有定义的。

What is the best approach here?

这里最好的方法是什么?

Cache the NSBitmapImageRep of the 2 views, then replace them with the 3rd view, using the cached image(s) as background
缓存两个视图的NSBitmapImageRep，然后用第三个视图替换它们，使用缓存的图像作为背景。
Set the alpha value for each view separately (still not quite sure how to get the black background for the graying effect)
分别设置每个视图的alpha值(仍然不确定如何获得灰色效果的黑色背景)
Something I haven't considered
我还没有考虑

2 个解决方案

#1

I'd use a child window. Set its content view to a plain black view (hopefully with status and progress information in subviews), and its alpha value to the desired fade-out, and add it as a child window of the window whose content you want to fade out.

我将使用子窗口。将其内容视图设置为纯黑色视图(希望在子视图中有状态和进度信息)，并将其alpha值设置为所期望的淡出效果，并将其添加为窗口的子窗口，其内容您希望淡出。

#2

I'd teach the views how to draw themselves in a disabled state, but there are other suggestions here:

我将教大家如何把自己画在一个残疾的国家里，但是这里还有其他的建议:

How can I darken everything displayed in a single NSView?

我怎样才能把所有显示在一个NSView中的东西都变黑?

#1

#2