Jiggly splash screens

[Richmond]

On 10/26/2013 06:53 PM, J. Landman Gay wrote:
> A 2-tick wait is probably too long.  Try one millisecond and work up from there.
>
> Without a wait, the engine will go as fast as possible and will skip redraws to increase speed.  It only takes a very tiny wait to force a redraw.

Well; I commented out the 'wait' lines and the thing sped up 
(marginally), but there was still a jiggly effect.

Perhaps the problem is because the stack does not really shrink about 
its centre, but shrinks into its top-left-hand corner, and because of 
this the image has to keep being moved.

> Richmond <richmondmathewson at gmail.com> wrote:
>> on mouseUp
>>     set the vis of btn "DEMONSTRATE" to false
>>     put 400 into DIMZ
>>     repeat until DIMZ=4
>>        put (DIMZ - 2) into DIMZ
>>        set the lockscreen to true
>>        set the width of stack "SPLASH" to DIMZ
>>        set the height of stack "SPLASH" to DIMZ
>>        set the width of img "tom" to DIMZ
>>        set the height of img "tom" to DIMZ
>>        set the left of img "tom" to 0
>>        set the top of img "tom" to 0
>>        wait 2 ticks
>>        set the lockscreen to false
>>     end repeat
>>     repeat until DIMZ=400
>>        put (DIMZ + 2) into DIMZ
>>        set the lockscreen to true
>>        set the width of stack "SPLASH" to DIMZ
>>        set the height of stack "SPLASH" to DIMZ
>>        set the width of img "tom" to DIMZ
>>        set the height of img "tom" to DIMZ
>>        set the left of img "tom" to 0
>>        set the top of img "tom" to 0
>>        wait 2 ticks
>>        set the lockscreen to false
>>     end repeat
>>     set the vis of btn "DEMONSTRATE" to true
>> end mouseUp
>