DragSource.j

AppBadgeViewDragType = "AppBadgeViewDragType";

function hypot(x,y) {
		var hyp = Math.sqrt(x*x + y*y);
		return hyp;
}


@implementation AppBadgeItemView : CPView
{
    CPImageView imageView;
    CPTextField textField;
	CPEvent		mouseDownEvent;
}

- (void)setRepresentedObject:(id)anObject
{
    if (!imageView)
    {
        imageView = [[CPImageView alloc] initWithFrame:CGRectMake(10.0, 10.0, 80.0, 80.0)];
        
        [imageView setImageScaling:CPScaleProportionally];
    
        [self addSubview:imageView];
    }
    
    if (!textField)
    {
        textField = [[CPTextField alloc] initWithFrame:CGRectMake(10.0, 96.0, 80.0, 20.0)];
        
        [textField setFont:[CPFont boldSystemFontOfSize:12.0]];
		[textField setAlignment:CPCenterTextAlignment];
		[textField setValue:CGSizeMake(0.0, 1.0) forThemeAttribute:@"text-shadow-offset"];
		[textField setValue:[CPColor colorWithCalibratedWhite:79.0 / 255.0 alpha:1.0] forThemeAttribute:@"text-color"];
		[textField setValue:[CPColor colorWithCalibratedWhite:240.0 / 255.0 alpha:1.0] forThemeAttribute:@"text-shadow-color"];
        
		[self addSubview:textField];
    }
    
    [imageView setImage:[anObject image]];
    [textField setStringValue:[anObject name]];
}

- (void)setSelected:(BOOL)isSelected
{
    [self setBackgroundColor:isSelected ? [CPColor blueColor] : nil];
    [textField setTextColor:isSelected ? [CPColor whiteColor] : [CPColor blackColor]];
}

- (void)mouseDown:(CPEvent)event
{
	mouseDownEvent = event;
}

- (void)mouseDragged:(CPEvent)event
{
	var down = [mouseDownEvent locationInWindow];
	var drag = [event locationInWindow];
	
	var distance = hypot(down.x - drag.x, down.y - drag.y);
	if (distance < 3) {
		return;
	}
	
	down.x -= [self frame].origin.x + 40;
	down.y -= [self frame].size.height - 30;
	var pb = [CPPasteboard pasteboardWithName:CPDragPboard];
	
	[self dragImage:[imageView image]
				 at:down
			 offset:CGSizeMakeZero()
			  event:mouseDownEvent
		 pasteboard:pb
			 source:self
			 slideBack:YES];
			  
}

@end