On 03/21/2014 03:25 PM, Andreas K. Huettel wrote: > How about fixed aspect ratio resize? Very useful for images...
Perhaps. What is the proposed UI mechanism? I don't like the idea of having to press a special key (it's not intuitive, and doesn't work well on tablets); the logical thing is probably to snap to fixed-aspect when the pointer position is close enough? How does the tolerance work, i.e. what is the snap zone? should it be a fixed width in pixels? proportional to the initial size of the rectangle being resized? proportional to its current size? Probably I'll have to first implement it and then play with it to see what's most intuitive. If one really wants to do a resize that isn't aspect-preserving but is very close to it, what does one do (apart from disable the feature -- I'm thinking this would be a config option)? For analogy, and to discuss another potentially useful feature, should the ruler tool also be snappy? (to favor horizontal and vertical lines over not-quite-horizontal lines) Perhaps not -- or if one does it, how does one un-snap if one really wanted a not-quite-vertical/horizontal line? Ah, here's an idea: one-sided snappiness! When a ruler line being drawn is constrained to horizontal or vertical, it stays that way until the user deviates too much from horizontal or vertical. However, once it is unconstrained, it stays unconstrained until the user crosses the horizontal or vertical direction, not merely approaches it. (So: if I'm trying to draw a nearly but not quite horizontal line that goes slightly up, and it accidentally snaps down to horizontal, my first instinct will be to move the cursor up to un-snap it, and while I may have to go further up than intended to achieve that, this mechanism would then let me bring the cursor back down to my intended end-point without snapping again). Does this sound convincing on paper? (I'd rather not implement something unless it sounds convincingly like it could be The Right Thing). So, now, going back to the image case and how to perform almost-aspect-preserving resizes: should selection resizes be one-sided-snappy to aspect-ratio-preserving? (i.e., it only starts snapping once you actually cross the aspect-ratio-preserving line, and then stays snappy as long as you stay close enough to it) ? Does anyone with a good sense of imagination have thoughts about whether one-sided-snappy would be intuitive to the user, or a better proposal? Denis -- Denis Auroux aur...@math.berkeley.edu University of California, Berkeley Tel: 510-642-4367 Department of Mathematics Fax: 510-642-8204 817 Evans Hall # 3840 Berkeley, CA 94720-3840 ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech _______________________________________________ Xournal-devel mailing list Xournal-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xournal-devel
