> Le 29 juil. 2015 à 12:25, Dave <d...@looktowindward.com> a écrit :
>
> Hi,
>
> For reasons that are too complex to go in to, I need to somehow create a
> Unique ID that is valid for the life of a Window. The Window I am trying to
> identify is not owned by my App (think Screen Dump, like “Grab”).
>
> I ran this code:
>
> CFArrayRef windowList =
> CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID);
> for (NSMutableDictionary* entry in (NSArray*)windowList)
> {
> NSString* ownerName = [entry objectForKey:(id)kCGWindowOwnerName];
> NSInteger ownerPID = [[entry objectForKey:(id)kCGWindowOwnerPID]
> integerValue];
> NSLog(@"%@:%ld", ownerName, (long)ownerPID);
> }
> CFRelease(windowList);
>
> This is the dictionary returned for this Email message:
>
> {
> kCGWindowAlpha = 1;
> kCGWindowBounds = {
> Height = 858;
> Width = 1003;
> X = 874;
> Y = 342;
> };
> kCGWindowIsOnscreen = 1;
> kCGWindowLayer = 0;
> kCGWindowMemoryUsage = 3462288;
> kCGWindowName = "New Message";
> kCGWindowNumber = 2895;
> kCGWindowOwnerName = Mail;
> kCGWindowOwnerPID = 507;
> kCGWindowSharingState = 1;
> kCGWindowStoreType = 2;
> },
>
> Are one or more of these values guaranteed to be Unique (within the Window
> List) and not to change during the life-time of the Window?
>
> Thanks a lot.
>
> All the Best
> Dave
From the Window Services Reference:
kCGWindowNumber
The value for this key is a CFNumberRef
<https://developer.apple.com/library/mac/documentation/CoreFoundation/Reference/CFNumberRef/index.html#//apple_ref/c/tdef/CFNumberRef>
type (encoded as kCGWindowIDCFNumberType
<https://developer.apple.com/library/mac/documentation/Carbon/Reference/CGWindow_Reference/Constants/Constants.html#//apple_ref/c/macro/kCGWindowIDCFNumberType>)
that contains the window ID. The window ID is unique within the current user
session.
<> <> <> <>
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