Get NSWindow* from CGWindowListCopyWindowInfo

| | August 11, 2015

I have accomplished listing all the windows (in z order from front to back I think/hope) using CGWindowListCopyWindowInfo but I am having an issue getting the NSWindow* from it so i can use with orderFront: etc.

It seems I don’t even get CGWindowID from it.

This is my code, it is js-ctypes but i need the OSX experts please, thats why I didnt tag with jsctypes.

var cfarr_win = ostypes.API('CGWindowListCopyWindowInfo')(ostypes.CONST.kCGWindowListOptionAll | ostypes.CONST.kCGWindowListExcludeDesktopElements, ostypes.CONST.kCGNullWindowID);

var cnt_win = ostypes.API('CFArrayGetCount')(cfarr_win);

for (var i = 0; i < cnt_win; i++) {
    var thisWin = {};
    // trying to get NSWindow* to the window here, so i can use with orderFront: etc

    // example on how i get pid:
    var rez_pid = ostypes.API('objc_msgSend')(c_win, ostypes.HELPER.sel('objectForKey:'), myNSStrings.get('kCGWindowOwnerPID'));
    var int_pid = ostypes.API('objc_msgSend')(rez_pid, ostypes.HELPER.sel('integerValue'));
    thisWin.pid = int_pid;

    // please help me on how to get NSWindow*

}

PS: Even though I am using the exclude desktop elements flag I am still get desktop elements like cursor and dock, by any chance if answerer can shed some light on how to fix that too that would be aweomse!

One Response to “Get NSWindow* from CGWindowListCopyWindowInfo”

  1. Michael Dautermann on November 30, -0001 @ 12:00 AM

    The key you should be using to get window ID’s is kCGWindowNumber.

    And to get a NSWindow from a window number, you could use [NSApp windowWithWindowNumber:windowNumber].

    Unfortunately this will only work for windows that your app owns and not for other applications windows.

    Furthermore, if you really wanted to use NSWindow once you get the window ID for other app’s windows, it’s a bad assumption: not all CGWindows are NSWindows. And outside of that above call, Apple doesn’t provide a way to get from CGWindow to NSWindow. To work with other app’s windows (provided the other app is cooperative), you’ll have to stick with working with the CGWindow objects.

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