Question

I am using Quartz through an FFI based on ffilib (that is Quartz is dynamically loaded). A call to CGWindowListCopyWindowInfo returns an CFArray of dictionaries containing information on windows. One interesting key is kCGWindowName, which can be used to get the name of a window.

In C one would include the approriate header file, but since I am using ffilib I need to know the value of kCGWindowName. According to Apple’s documentation it is CFStringRef.

How can I obtain the value of kCGWindowName?

An attempt grepping for kCGWindowName in the header files gave no usable result.

Answer 1

Something like this…

CFArrayRef windowsInfo = CGWindowListCopyWindowInfo(listOptions, kCGNullWindowID); 

for (CFIndex idx=0; idx<CFArrayGetCount(windowsInfo); idx++) {
    CFDictionaryRef dict = CFArrayGetValueAtIndex(windowsInfo, idx);
    CFStringRef windowName = CFDictionaryGetValue(dict, kCGWindowName);
    NSString* nsWindowName = (NSString*)windowName;
}

CFRelease(windowsInfo);