Showing/Hiding Images on mouseLeave...

[John J. Theobald]

Igor de Oliveira Couto wrote some time ago:


> Dear Revolution Masters,
> 
> I'm trying to implement a simple button that should use 3 different 
> images: 'idle', 'over' (when the cursor in on top of the button), and 
> 'down' (when  the mouse is down on the button).
> 
> Because the shape of the button is irregular, and I want the 
> transparent bits to be ignored for mouse events, rather than specifying 
> the images as icons in a button control, I used IMAGES. My idea was to 
> setup the 3 images on a card, on top of each other, and simply 
> show/hide each one in response to the appropriate mouse events.
> 
> So I started by putting the 'idle' image on the card, and then the 
> 'over' image on top of that, making sure the 'loc' properties of both 
> was exactly the same (ie, they were exactly on top of each other). Each 
> picture is exactly the same as the other, just using different 
> colours... Now, I went into the scrip of the 'idle' picture, and typed:
> 
> on mouseEnter
> 	show image "over"
> 	hide me
> end mouseEnter
> 
> Then, I went into the script of the 'over' image, and did the opposite:
> 
> on mouseLeave
> 	show image "idle"
> 	hide me
> end mouseLeave
> 
> Now, what is happening when I use the browse tool is a bit of a puzzle: 
> it goes like this:
> The card is displaying the 'idle' image. I move the cursor into the 
> image, and presto, I see the 'over' image. I also know that the 'idle' 
> image HAS been hidden - I can check with the message box...
> Now, I slowly move the cursor OUTSIDE the image, and... nothing. The 
> 'over' image behaves as if it has NOT received the 'mouseLeave' 
> message...
> I move the cursor back onto the 'over' image, and move it back out - 
> now for the second time - and, presto, it works: it hides the 'over' 
> image and shows the 'idle' image.
> The crunch of the matter is: I have to 'leave' the image TWICE for it 
> to work... EVERYTIME!
> 
> All I can deduct is that for some reason, the first time the mouse 
> leaves the 'over' image, no 'mouseLeave' message is being sent to it! 
> Only after the cursor has re-entered the image, and then proceeds to 
> leave again, does it work...
> 
> Am I missing something embarrassingly simple? Did I not read the 
> documentation properly? Is this a behaviour that others have noticed? 
> Is it a bug?
> 
> Any help would be greatly appreciated!
> 
> Kind Regards,
> --
> Igor de Oliveira Couto
> ----------------------------------
> igor at pixelmedia.com.au
> ----------------------------------
> 


Igor,

I ran into this problem on MC 2.4.3 while developing.  I searched the 
archives and saw your posting along with numerous responses but no clear 
solution.

Here is how I solved the problem, for those that may (or may not) be 
interested.  I chased the problem like many others by trying to get the 
button to do what I wanted on the mouseLeave.  Then it occured to me, if 
  I am leaving one object, I must be entering another so...

I simply put a transparent graphic behind my "freeform" shaped button. 
This graphic extends beyond the borders of my button. I then put this 
handler in the graphic.

on mouseEnter
   put image "normalstate" into image "goback"
end mouseEnter


"goback" is the name of my "freeform" button, "normalstate" is the image 
I want displayed when I do a mouseLeave.  Since leaving the button does 
not generate a mouseLeave (as you discovered), entering the transparent 
graphic DOES generate a mouseEnter and the opportunity to change the 
graphic.  You could, of course, reference a file, imagedata (and 
maskdata if needed),or just a hidden image as I do.  All of which were 
recently discussed in another thread.

Sorry if this is old news, but since I did not see a solution posted, I 
thought I would pipe up.

Regards,

John Theobald