Ian, have you ever seen Tim Schaub's Scalebar for ka-Map? that's all JS and CSS: http://www.ominiverdi.org/ka-map/ka-map/htdocs/
ciao Lorenzo Ian Mayo wrote: > Here's the design for my OpenLayers scale control, aimed to offer > similar functionality to the scale offered in google maps. > > The new control is to be called "ScaleLine". Yes, there's lots of > room for improvement there, suggestions welcome. > > Here are the steps I'll take: > 1. Determine current scale > 2. Determine width of view in metres > 3. Determine how wide 10% of view is in metres > 4. Round width up/down to nearest "round number" in increasing size of units: > -- 1,2,5,10,20,50,100,200,500 (metres) > -- 1,2,5,10,20,50,100,200,500,1000,2000 (km) > 5. Calculate size of line of rounded length in screen units > 6. Draw line of scaled length, with text-label on right-hand size into > 'div' for this control > 7. Repeat the above for imperial units > > The Div will have been located using the css-style called .olControlScaleLine > > Questions from me? > > Well, yes. I've seen from the other controls how to draw plain text > onto the map. Drawing my graphic is a little more complex. Should > the line and "tails" be an OpenLayer feature? Or is there another > method for drawing line-based items. I suppose I could have a div > with left, bottom, right borders - with the div-width set to the width > in step 5 above. > > Any advice? > > thanks in advance for any support, > Ian. > > p.s. Should I have written this content into a wiki page? Opinions welcome. > _______________________________________________ > Dev mailing list > [email protected] > http://openlayers.org/mailman/listinfo/dev > _______________________________________________ Dev mailing list [email protected] http://openlayers.org/mailman/listinfo/dev
