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In the application I’m writing, I need to check the mouse coordinates to insure they are within the bounds of a custom view before an action can be taken. Yet, when compiling the code there is an error that says the custom view might not respond to “frame”.

if (!NSPointInRect(dragStartLocation, [CustomTitleArea frame])) { return; }

Do I have to specifically define the location of the custom view called “CustomTitleArea” or am I simply missing something?

What is “CustomTitleArea”? Is it a class or is it an instance of NSView or NSView subclass?

“CustomTitleArea” is a sublcass of NSView.

NSView doesn’t respond to the message +[NSView frame], so unless you have defined a frame class method for CustomTitleArea it won’t work.

Is that the only problem? I just need to write the files for it (or let IB make them for me and finish the frame code)? I thought I was missing something subtle. Thanks for the help.

Actually, what I meant was that it sounds like you are messaging the class object (e.g. NSArray, CustomTitleArea) rather than an instance of the class (e.g. NSArray *myArray, CustomTitleArea *myPlace).

I had another thought. What if I decided to simply use an NSImageView?

Hmm, It may be subtle, is CustomTitleArea a class name or an instance name? NSView instances do respond to - frame , but you need to call it on a class instance, not a class name. If you designated the custom class in IB, yes you will need to generate the files for CustomTitleArea. You will also need a connected outlet to get to the instance in your window.

I probably just don’t know what I’m doing all the way around. Let’s assume I drag-and-drop an NSImageView onto a window, what would I have to do to turn that into CustomTitleArea? If that makes any sense at all. Should I subclass it? Instantiate it? I don’t know. This might explain it better. I want to be able to drag a window that is borderless, only when the mouse is within a specific area of the window, say on a .tiff image of a clown being displayed by the NSImageView. Everything else is working just fine, and I can “hack” a workable method together for moving the window when the mouse is in a specific area. However, I don’t want to have to resort to some hack. I hope that clears up some confusion. —- (Edited: RoundTransparentWindow reference removed because it lacks a solution to the specific problem. Everything else concerning the interface is working perfectly well. I simply am unable to figure out, for whatever reason, how to get NSImageView to respond to “frame” in the code above. I have hacked together a version that will do this, but again I would prefer not to use a hack job.) —- Define an NSImageView outlet in your window delegate (or any other appropriate place of your choice that makes sense in the context of the windows/views lifetime) and connect it. This will give you an instance variable on which you can call - frame / - setFrame: from code. You could also derive CustomTitleArea from NSImageView. The RoundTransparentWindow sample shows one solution for dragging a window from an area other than the title bar. Another solution would be to catch the drag ( - mouseDragged: ) from your custom view and move your parent window by the events - deltaX/ - deltaY.