/*

     File: MainController.m

 Abstract: OverlayView shows a simple method to draw one view on top of other views. This example shows lines extending from the edge of a controller to the edge of its superview, imitating Interface Builder.

  Version: 1.2

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#import "MainController.h"

#import "OverlayView.h"

@implementation MainController

@synthesize editing;

- (void)awakeFromNib {

    // Programmatically instantiate an OverlayView and add it as the last (frontmost)

    // subview of the outerBox's superview.  (We could instead create the OverlayView in

    // Interface Builder, but adding the OverlayView at runtime keeps the .xib file easier to edit.)

    //

    overlayView = [[OverlayView alloc] initWithFrame:[outerBox frame]];

    // Autoresize together with the outerBox.

    [overlayView setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];

    // Start out hidden, since we're not initially in editing mode.

    [overlayView setHidden:!editing];

    // Let the overlayView know which view it should hit test for mouse events in

    // (we wish to exclude the overlay view itself).

    //

    [overlayView setOverlaidView:outerBox];

    // This is the key to making an overlay view work. When we insert the view into the

    // list of subviews, it is added as the last item in the array, making it the last to

    // draw and therefore 'on top' of the other sibling views.

    //

    [[outerBox superview] addSubview:overlayView];

    // Work around an issue that prevents the scroll view from drawing correctly with

    // overlay views when [NSClipView copiesOnScroll] == YES

    //

    [[scrollView contentView] setCopiesOnScroll:NO];

}

- (void)setEditing:(BOOL)edit {

    if (edit != [self editing]) {

        // Show the overlayView only when editing

        editing = edit;

        [overlayView setHidden:!editing];

    }

}

- (void)dealloc {

    [overlayView release];

    [super dealloc];

}

@end