[REBOL] crop bug?
From: atruter::hih::com::au at: 9-Jan-2002 17:08
The following code allows an image to be scrolled, but on my (Win95) system
it intermittently leaves "image residue" at a screen edge. Try running the
code and pressing the up-arrow key a few times to see what I mean. Is this
a bug? Are negative crop values A Good Idea? Any work-arounds?
REBOL []
image-data: load read-thru/to http://www.rebol.com/view/demos/nyc.jpg %nyc.jpg
view layout [
img: image image-data effect reduce ['crop 0x0 image-data/size]
sensor 0 keycode[up] [img/effect/crop: img/effect/crop - 0x20 show img]
sensor 0 keycode[down] [img/effect/crop: img/effect/crop + 0x20 show img]
sensor 0 keycode[left] [img/effect/crop: img/effect/crop - 20x0 show img]
sensor 0 keycode[right] [img/effect/crop: img/effect/crop + 20x0 show img]
]
Regards,
Ashley
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