Showing a modal NSWindow, without activating the other application windows

Question

I have an NSStatusItem that is properly displaying in the MenuBar. One of the items (when clicked) displays a modal NSWindow from my application, which is meant to perform a one-off task, then disappear. (Eg. the user enters a small bit of text, clicks "Save", and the modal NSWindow goes away.)

The issue occurs when the application is running in the background. The modal window properly appears above whatever application is running in the foreground, but when the user clicks the "Save" button, the rest of the application's windows also are made active. This is undesirable, as the user then has to click back to whatever app they were using. (Destroying the convenience of the NSStatusItem.) I'm displaying the modal window using:

[myWindow setFrame:finalRect display:YES animate:NO];
[myWindow setLevel:NSPopUpMenuWindowLevel];
[NSApp runModalForWindow:myWindow];

Is there any way to prevent clicks/events in my popup window from causing the rest of the application to become active? Or a way to let NSApp know that this particular panel shouldn't automatically activate the rest of the app? Thanks!

Answer 1

Instead of creating an NSWindow, create an NSPanel with the style NSNonactivatingPanelMask. You can then do the usual makeKeyAndOrderFront: and orderOut: to show/hide panel as needed.

Answer 2

NSApp's beginModalSessionForWindow, runModalSession, endModalSession are methods you need.

Have a look here for example how to use it: Creating a fully customized NSAlert

Answer 3

A solution by Ken Thomases on the cocoa-dev list a couple years ago looks applicable here too:

[[NSApplication sharedApplication] hide:self];
[[NSApplication sharedApplication] performSelector:@selector(unhideWithoutActivation) 
                                        withObject:nil 
                                        afterDelay:0.05];

Which in theory tells the application to hide itself and unhide at the bottom of the window stack.

You could also intercept the mouse click event and use [NSApp preventWindowOrdering]