*crosspost to get more detailed info* 2008/7/16 Alan W. Irwin <[EMAIL PROTECTED]>: > On 2008-07-16 11:11+0800 Paul Harris wrote: > >> Hi, >> >> I'm new to plplot. I'd like to utilise plplot to generate charts in my >> program. >> >> I would like to be able to plot points as circles, lines or whatever, >> and then be able to click on those markers and display additional info >> elsewhere in my application. >> >> Has anyone done this? >> >> I would be getting the mouse click from the GUI (QT) and then either >> passing it to plplot, or use some other mechanism to be able to map >> that mouse coord to a marker. >> >> I don't see anything obvious in the docs or the code... so I was >> thinking about how I'd do it. >> >> One way would be to write a driver that goes through the motions of >> pretending to draw a chart, but instead is able to match up a mouse >> coord to the markers that it is told to draw... >> >> so, has anyone done something like this? > > The core of PLplot supports interactive capability for those drivers > that have it implemented. > > Our xwin device has interactive capability where you can display > cross-hairs, move them around, and when a key is clicked, deliver the > position of the crosshairs and the identity of the key which was clicked. > To see this capability in action try the -locate option for C example 1 with > -dev xwin. -dev wxwidgets has similar capability, although I could only get > the return key to work at this time. I think there is a plan to implement > at > least the level of xwin capability in the xcairo device. For example, you > get some hits when you grep for "cross" in the cairo code. However, I > couldn't get it to work (no crosshairs were displayed with example 1 when > the -locate option was used.) > > Anyhow, you could use these interactive capabilities for a start for > doing something more interesting. You may want to work with -dev wxwidgets > or -dev xcairo since both have modern font capabilities while xwin does > not. >
Thanks Alan, I gave that a try, but its not going to give me the key information that I'm interested in. So I'll expand my question for the devel list, hopefully someone has the know-how... Is there some way of being able to tell what element of a plot was clicked, given a coordinate of a click (it could be a data, window or global coordinate - whatever is required to get the job done) Use-case would be a plot of a dozen points as circles, or squares, or some other marker... user clicks mouse on a circle... plplot is able to work out that user clicked on pixels belonging to that circle and tell me what that point is (identification could be ID, dataset + row, whatever) cheers Paul ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
