More about images

[Ken Norris (dialup)]

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Hi Jan,
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> Date: Thu, 6 Feb 2003 01:29:38 -0800 (PST)
> From: Jan Schenkel <janschenkel at yahoo.com>
> Subject: Re: More about images

>> I'd rather write a
>> simple routine that will do the same as it does in
>> HC with Uli's xDraw: Draw
>> corresponding button rects of the DOWN state image.
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See what I need the screen to draw? The main image looks like a computer
keyboard with all the keys in the UP position, and has 76 transparent
buttons over the "key" simulations in the image. When you move the cursor
over a "key" and press the mouse, you are sending a mouseDown to the
transparent button. In my HC version, this simulates a "key" press by using
the rect of the button to display _only_ that same _portion_ of the
DOWN-state image which is in memory. The basic call (just for the display,
not other actions) with the XCMD in HC looks like this:

on theKey
  GLOBAL gBgGW_id
  lock screen
  get xGWorld( "lock",gBgGW_id )
  get xGWorld( "draw",gBgGW_id,rect of the target, rect of the target, the
id of card window )
  get xGWorld( "unlock",gBgGW_id )
  play "kyDnSnd"
  wait until the mouse is up
  unlock screen -- redraw screen when mouse is released
  play "kyUpSnd"
end theKey

...It performs a kind of cookie cutter thing: displays a rect of a matching
_portion_ of the DOWN image over the same position of the Up image.
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> Hi Ken,
> 
> Try this scenario:
> - group the "Down" image (yes, just the one image)
> - set the rect of the group to the rect you want to
> display every time
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If I understand you correctly, I think that will resize the whole image, and
we'll end up with a miniature of the whole keyboard, won't it?
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> - set the lockLocation of the group to true
> - hide the group
> Then when you need to display:
> - set the hScroll of group "DOWN" to X
> - set the vScroll of group "DOWN" to Y
> - show group "DOWN"
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That will scroll the whole grouped DOWN image somewhere...won't work either.
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> That ought to do the trick.
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Thanks for trying. Maybe I just don't fully understand what happens if you
group the image. It has to be in a background behavior thing anyway.

Ken N.