Re: Fade out the window content
Re: Fade out the window content
- Subject: Re: Fade out the window content
- From: Lorenzo <email@hidden>
- Date: Wed, 09 Feb 2005 23:53:46 +0100
Thank you, but... in my window I have a NSOpenGLView which runs an animation
actually. I can't do what you say. I need to act on the rgba values, but I
don't know how yet.
Any idea?
Best Regards
--
Lorenzo
email: email@hidden
> From: Guy English <email@hidden>
> Reply-To: Guy English <email@hidden>
> Date: Wed, 09 Feb 2005 17:01:59 -0500
> To: Lorenzo <email@hidden>
> Cc: email@hidden
> Subject: Re: Fade out the window content
>
> Render the windows content view to an NSImage.
> Remove the content view and replace it with your own NSView subclass.
> pass the image to your NSImage subclass and tell it to start fading.
>
> In the NSView subclass you'll need an NSImage an NSTimer, an NSColor
> to disolve to and an NSDate for the start time. You may also want a
> duration as an NSTimeInterval.
> When you get the start message register a timer.
> When you get the timer fired message workout how long you've been
> running for and set yourself as needing redisplay.
>
> In the drawRect fill the bounds rect with the disolve to color then
>
> alpha = 1.0 - ((now - startTime) / duration)
>
> use this alpha to render the image (pass it in the fraction of the
> drawInRect method).
>
> When you've passed your duration stop the timer and you're done.
>
> Guy
>
> On Wed, 09 Feb 2005 20:56:46 +0100, Lorenzo <email@hidden> wrote:
>> Hi,
>> do you know a way to fade out to black the whole content of a window?
>>
>> Best Regards
>> --
>> Lorenzo
>> email: email@hidden
>>
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