Question

I have an NSSegmentedControl on my UI with 4 buttons. The control is connected to a method that will call different methods depending on which segment is clicked:

- (IBAction)performActionFromClick:(id)sender {
    NSInteger selectedSegment = [sender selectedSegment];
    NSInteger clickedSegmentTag = [[sender cell] tagForSegment:selectedSegment];

    switch (clickedSegmentTag) {
            case 0: [self showNewEventWindow:nil]; break;
            case 1: [self showNewTaskWindow:nil]; break;
            case 2: [self toggleTaskSplitView:nil]; break;
            case 3: [self showGearMenu]; break;
    }
}

Segment 4 has has a menu attached to it in the awakeFromNib method. I’d like this menu to drop down when the user clicks the segment. At this point, it only will drop if the user clicks & holds down on the menu. From my research online this is because of the connected action.

I’m presently working around it by using some code to get the origin point of the segment control and popping up the context menu using NSMenu’s popUpContextMenu:withEvent:forView but this is pretty hacktastic and looks bad compared to the standard behavior of having the menu drop down below the segmented control cell.

Is there a way I can have the menu drop down as it should after a single click rather than doing the hacky context menu thing?

Answer 1

I’m not sure of any built-in way to do this (though it really is a glaring hole in the NSSegmentedControl API).

My recommendation is to continue doing what you’re doing popping up the context menu. However, instead of just using the segmented control’s origin, you could position it directly under the segment (like you want) by doing the following:

NSPoint menuOrigin = [segmentedControl frame].origin;
menuOrigin.x = NSMaxX([segmentedControl frame]) - [segmentedControl widthForSegment:4];
// Use menuOrigin where you _were_ just using [segmentedControl frame].origin

It’s not perfect or ideal, but it should get the job done and give the appearance/behavior your users expect.

(as an aside, NSSegmentedControl really needs a -rectForSegment: method)