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Index › Programming Questions & Help › Syntax Questions › Fade in images & Check mouse is over applet
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Fade in images & Check mouse is over applet (Read 1589 times)
XYX
Fade in images & Check mouse is over applet
Dec 1st, 2009, 6:45am  
Hi guys, i've been working on a navigation/header image for a website and i've come across a couple of problems so far:

1. How can you fade an image in (PImages don't have an opacity value)
2. How can you check whether the mouse is over the applet or not (mouseX/mouseY don't work to well for checking if the mouse is over the applet)

Also does the ESS library stop applets working online still? I't wouldnt work for ages until i commented out what i was going to use Ess for

Thanks everyone, keep up the great work Smiley always nice to see interesting new things here
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PhiLho 
Re: Fade in images & Check mouse is over applet
Reply #1 - Dec 1st, 2009, 7:49am  
PImage sure does has an opacity value.
And I don't think you can reliability check (unless I miss something) mouse non over applet, as it goes beyond the scope of the applet, precisely.

I don't recall what ESS does but if is access hardware, it won't work, not without some effort (signing applet, etc.).
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blindfish
Re: Fade in images & Check mouse is over applet
Reply #2 - Dec 1st, 2009, 8:26am  
You could use mouseEntered to determine if the mouse is over the applet (as in this demo).  Don't know what reliability issues you might encounter though...
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Where is the what if the what is in why?
 
XYX
Re: Fade in images & Check mouse is over applet
Reply #3 - Dec 1st, 2009, 8:46am  
@PhiLho
How would you set the opacity to 50% for example then? The documentation mentions RGB, ARGB, ALPHA for the 'format' but i'm unsure on how to use them

@blindfish
thanks loads, that looks like it should do fine Smiley
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PhiLho 
Re: Fade in images & Check mouse is over applet
Reply #4 - Dec 1st, 2009, 9:15am  
Interesting, blindfish.
Note from source (or API ref): "If you override this or any function that takes a "MouseEvent e" without calling its super.mouseXxxx() then mouseX, mouseY, mousePressed, and mouseEvent will no longer be set."

Opacity: show a simple example of what you want to do, I will show you how to get the effect you need.
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Cedric
Re: Fade in images & Check mouse is over applet
Reply #5 - Dec 1st, 2009, 1:49pm  
as far as i know image transparency is achieved by using tint(255,alpha)
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