windowNumbersWithOptions: on Yosemite 我的应用程序 return NSPanel windows 失败

Question

我有一个基于文档的应用程序，有一个主文档 window 和几个 "satellite" NSPanel windows 显示相关信息。它们不是浮动的，它们可以（并且确实）成为关键，并且似乎与主要 window.

在同一层

我尝试像这样实现 show/hide 操作：如果面板不可见 - 显示它。如果它是可见的，但不是前面的 - 把它放在前面。如果它可见且在前面 - 隐藏它。

为此，我需要知道 NSPanel 是否为 "frontmost"。遗憾的是，没有 NSWindow API 存在。为此，我尝试使用 windowNumbersWithOptions 来比较面板的 z 顺序。

-(void) togglePanelVisibility:(PMXPanelController *)panelController {
    NSPanel *panel = [panelController window];
    if ([panel isVisible]) {
        NSArray *windowNumbers = [NSWindow windowNumbersWithOptions:0];
        if ([panel windowNumber] == [[windowNumbers firstObject] integerValue]) {
            [panel orderOut:self];
        }
        else {
            [panel makeKeyAndOrderFront:self];
        }
    } else
        [panelController showWindow:self];
}

唉，我收到的数组只包含一个数字 - 用于我的主文档 window。我可以在 "Window" 菜单中看到我的面板，我可以单击它们将它们置于最前面，我可以关闭它们并使用它们 - 但我无法通过 windowNumbersWithOptions:

有人有想法吗？

Answer 1

它在任何地方都没有说明这一点，但是从 NSWindowNumberListAllApplications 返回的少量 windows 来看，它看起来像 windowNumbersWithOptions 只有 returns windows 从正常级别或应用某种不包括其他 windows 的过滤。最好的替代方案是 NSApplication 实例的 orderedWindows 属性，但由于您已经提到面板被警告：

Only windows that are typically scriptable are included in the array. For example, panels are not included.

最好记住这两种方法都依赖于 Quartz API 并且可能使用 CGWindowListCopyWindowInfo – 在最坏的情况下，您可以转到较低级别并使用它。

Answer 2

按照给定的建议，我终于得出了以下结论，这对我来说似乎很有效。

/* Here is the logic: If panel of panelController is frontMost - hide it.
    If it is visible, but not frontMost - bring it to front.
    If it is not visible - Show it, and bring it to front. */

-(void) togglePanelVisibility:(PMXPanelController *)panelController 
{
    NSWindow *panel = [panelController window];
    if ([panel isVisible]) {
        BOOL panelIsFront = [self isPanelFront:panel];
        if (panelIsFront)
           [panel orderOut:self];
        else
           [panel makeKeyAndOrderFront:self];
    } else
        [panelController showWindow:self];     
}

// Attempt to determine if a given panel (window) is front window
-(BOOL) isPanelFront:(NSWindow *)panel 
{
    BOOL panelIsFront = NO;
#if 0
    // This simple implementation won't work because orderedWindows don't  contain panels.
    panelIsFront = [panel isEqualTo:[[NSApp orderedWindows] firstObject]];

    // This used to work, but broke on OS X 10.10 Yosemite. I only receive my main window.
    panelIsFront = ([panel windowNumber] == [[[NSWindow windowNumbersWithOptions:0] firstObject] integerValue]);
#endif

    // Last resort, - using CoreGraphics window list. Seems to work on all systems up to 10.10.4
    NSMutableArray *windowNumbers = [NSMutableArray arrayWithCapacity:32];    // I rely on window numbers to determine "frontness".
    CFArrayRef windowInfoArray = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID);
    for (NSDictionary* nswindowsdescription in (__bridge NSArray*)windowInfoArray)  {
        NSNumber *windowLayer = (NSNumber*)[nswindowsdescription objectForKey:(NSString *)kCGWindowLayer];
        if (windowLayer.integerValue != 0)  // filter out windows not in our normal window layer.
            continue;

        NSNumber* windowid = (NSNumber*)[nswindowsdescription objectForKey:(NSString *)kCGWindowNumber];
        if(windowid)
            [windowNumbers addObject:windowid];
    }
    CFRelease(windowInfoArray);

    panelIsFront = ([panel windowNumber] == [[windowNumbers firstObject] integerValue]);
    return panelIsFront;
}

windowNumbersWithOptions: on Yosemite 我的应用程序 return NSPanel windows 失败

windowNumbersWithOptions: on Yosemite fails to return NSPanel windows of my application

cocoa

nswindow

z-order

nspanel