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Re: Rubberband box for object graphics [message #42525]

Sun, 13 February 2005 12:33

Mark Hadfield
Messages: 783
Registered: May 1995

Senior Member

Rainnie, JA (John) wrote:
> I'm delving into the IDL graphics objects, and specifically I wish to
> develop a plot window using the IDLgrPlot class. Thanks to several
> examples (mostly Dave Fanning's xPlot) I've mananged to do this.
> However, I really need to implement a rubberband box so the user can
> interactively zoom into this plot (like DF's zPlot). The conversion from
> device to data coordinates is of course done in direct graphics with the
> Convert_Coord function. However, I can't find any examples of how this
> is done for object graphics.
>
> Has anyone done this - and are there any examples you can direct me to.

My Motley library, hosted at

http://www.dfanning.com/hadfield/idl/README.html,

has an Object Graphics rubberband box for zooming into 2D or 3D plots.
It's implemented as one of several different "mouse handlers" that can
be selected via a drop-down list on the botttom of plot windows. The
relevant one is called the "Zoom" handler and the code for it can be
seen in the file mgh_mouse_handler_library.pro.

Make of it what you will. It's quite tigthly coupled with the rest of
the code in the library, so pulling it out would take a bit of work.

--
Mark Hadfield "Ka puwaha te tai nei, Hoea tatou"
m.hadfield@niwa.co.nz
National Institute for Water and Atmospheric Research (NIWA)

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[Message index]

		Re: Rubberband box for object graphics By: Mark Hadfield on Sun, 13 February 2005 12:33
		Re: Rubberband box for object graphics By: Chris Lee on Sat, 12 February 2005 10:22
		Re: Rubberband box for object graphics By: David Fanning on Sat, 12 February 2005 07:33
		Re: Rubberband box for object graphics By: Chris Lee on Sat, 12 February 2005 04:43
		Re: Rubberband box for object graphics By: b_gom on Fri, 11 February 2005 09:15
		Re: Rubberband box for object graphics By: David Fanning on Fri, 11 February 2005 06:10

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