Question

I have something really weird going on in my project (Flash CS5.5 and AIR 3…)

I need to check (for my own good reasons) whether the cursor is located within the bounds of a particular object. I’m using a simple code to do this…

if(mouseX > hsSlot1.x && mouseX < (hsSlot1.x + hsSlot1.width) && mouseY > hsSlot1.y && mouseY < (hsSlot1.y + hsSlot1.height))
    {
        //My code
    }

This, theoretically, should work perfectly! However, there is an offset (and one I did NOT set, mind you!) of about 16 between the hsSlot1’s visual position (where it appears to start on the screen) and hsSlot1.x. There is a similar offset on the y axis, but I haven’t measured it yet.

The only thing I can think of for this is that hsSlot1 is an instance of a button (one with only one state at that) that was scaled to fit. However, I don’t think that is it, because the numbers show that the entire object is merely offset at its current size.

What the devil is going on?

EDIT: I found another way of doing this that wasn’t working at first. However, an answer would still be appreciated, as this type of thing may be a problem later as well…

Answer 1

First couple of things that come to mind:

1. The registration point for the graphics for hsSlot1 is not exactly top-left.
2. I can’t tell what scope you’re calling this code from, but if you’re calling it from a container that doesn’t contain hsSlot1 as a direct child then it may be within another container that is positioned slightly off.

Why not try this (within the object hsSlot1 itself):

Dispatch an event from hsSlot1 when the mouse is “over” it:

if(mouseX > 0 && mouseX < width && mouseY > 0 && mouseY < height)
{
    dispatchEvent(
        new Event("CUSTOM_ROLLOVER")
    );
}

And listen for it from elsewhere:

hsSlot1.addEventListener("CUSTOM_ROLLOVER", _reaction);
function _reaction(e:Event):void
{
    trace('Glorious success.');
}

---

It still seems like you have graphics somewhere that aren’t justified top-left to the registration point. This dodgy diagram I just drew up might help you understand what I mean and why it would affect your code the way it does: