#683: Make d.scalebar look the same on different display sizes -------------------------+-------------------------------------------------- Reporter: perk | Owner: [email protected] Type: enhancement | Status: new Priority: normal | Milestone: 6.5.0 Component: Display | Version: svn-develbranch6 Keywords: scalebar | Platform: All Cpu: All | -------------------------+-------------------------------------------------- The current d.barscale is display dependent. The scale produced looks great on a display that's 640x480 pixels, but is unreadable on a 2400x1800 PNG display. Compare attached scalebar-default-before.png with barscale-big-after.png. This is also pretty easy to see by drawing a scalebar on an X11 display then making it full screen.
I think that the scale bar size should relative to the display size, not pixel size. I started out to fix this problem and thought it would be a relatively minor change. However, I ended up recoded a good deal of it because all of the relative sizes were hard coded and duplicated in several places. I think I've succeeded in my main goal: the proportions of the scalebar remain the same regardless of display size. The default behavior is very much the same as before, but a little cleaner (IMO). The layout is changed slightly but is very similar to the original. The only significant layout change was the positioning of the north arrow when text is above the scale bar. It is now larger and vertically centered in the surrounding box. I went on to add an "enlarge" option to shrink or enlarge the scalebar to get the text and north arrow just the right size by specifying an size percentage (100% = default). Hopefully, the code is a little cleaner now, but it's still not as clean as I would like. It at least has fulfilled my immediate need. -- Ticket URL: <http://trac.osgeo.org/grass/ticket/683> GRASS GIS <http://grass.osgeo.org>
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