Actually *lots* of people have locally modified copies - I keep encouraging
the user community to come forward and share (in the hopes of getting a
better example).
You do have commit access; feel free to add to that class (and rename the
reset method) as needed.
Jody
On Mon, Feb 16, 2009 at 10:43 AM, Michael Bedward <[email protected]
> wrote:
> Cool - thanks Jody.
>
> Yep, a mouse wheel tool sounds like a good idea...
>
> Since posting that I also thought I'd hack my local JMapPane to get
> the same behaviour with up and down arrow key strokes... actually '+'
> and '-' would probably be better. Also the class is crying out for a
> method to set the zoom factor.
>
> I suspect there are a few people who, like me, have a locally modified
> version of JMapPane. The class still seems to be used a lot judging
> by messages here, while there are very few mentions of Johann's
> 'pending' classes. I know at some stage there is meant to be a
> beautiful new rendering system but in the meantime perhaps it would be
> useful to do some housekeeping and tweaks of the JMapPane code. Ian's
> last commit was mid-2007.
>
> Michael
>
> 2009/2/16 Jody Garnett <[email protected]>:
> > Thanks; once again added to the user guide:
> > - http://docs.codehaus.org/display/GEOTDOC/MapPane
> > I actually think we could set up a tool to respect mousewheel events; but
> > have not looked at it.
> >
> > On Thu, Feb 5, 2009 at 10:48 AM, Michael Bedward <
> [email protected]>
> > wrote:
> >>
> >> Perhaps the easiest way of doing it, without sub-classing JMapPane, is
> >> something like this...
> >>
> >> // somewhere in your code...
> >> double clickToZoom = 0.1; // 1 wheel click is 10% zoom
> >>
> >> // wheel event handler
> >> public void handleMouseWheelEvent(MouseWheelEvent ev) {
> >> int clicks = ev.getWheelRotation();
> >> // -ve means wheel moved up, +ve means down
> >> int sign = (clicks < 0 ? -1 : 1);
> >>
> >> Envelope env = mapPane.getMapArea();
> >> double width = env.getWidth();
> >> double delta = width * clickToZoom * sign;
> >>
> >> env.expandBy(delta);
> >> mapPane.setMapArea(env);
> >> mapPane.repaint();
> >> }
> >>
> >>
> >> Warning: I can't test this because I don't have a mouse wheel :-)
> >>
> >> Michael
> >>
> >>
> >>
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