[SOLVED] Scrolling behavior ala Preview
[SOLVED] Scrolling behavior ala Preview
- Subject: [SOLVED] Scrolling behavior ala Preview
- From: David Hoerl <email@hidden>
- Date: Thu, 20 Jul 2006 09:04:09 -0400
[for the archives]
The way to get Preview style "scrolling" of images, where images that
are smaller than the visible rectangle get centered in the visible
rect is as follows:
- in your CustomeView drawRect method, look to see if the actual
image rectangle is smaller than the visibleRect of the superview
(which is of course the contentView).
- if so, for that axis only, expand the frameRect of the CustomeView
to fit size of that axis of the visibleRect. Save the old frameRect.
- use either a NSAffineTransform, or change the origin of the
boundRect, so that the undrawn space will be evenly split on either
side of the image.
- draw the image
- restore the original frameRect.
[Note - may be better ways to do this, but this way works.]
David
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