Landon, I just used a menu item. See the attached jpeg. I don't see any problem with a pop-up on the ZoomBar though. I needed units for another reason and I didn't have time to fully implement a spatial reference system.
I only mention SkyJUMP's code to perhaps save you little time
implementing the custom units for US. My implementation of
EnglishSystem is below.
Larry
package com.vividsolutions.jump.workbench.ui.plugin.scalebar;
import java.util.ArrayList;
import java.util.Collection;
/**
* This will eventually implement an interface called MeasurementSystem.
*/
public class EnglishSystem {
private double modelUnitsPerFoot;
public EnglishSystem(double modelUnitsPerFoot) {
this.modelUnitsPerFoot = modelUnitsPerFoot;
}
public Collection createUnits() {
ArrayList units = new ArrayList();
units.add(new Unit("mi", 5280d * modelUnitsPerFoot));
units.add(new Unit("ft", 1d * modelUnitsPerFoot));
units.add(new Unit("in", 1d/12d * modelUnitsPerFoot));
return units;
}
}
On Feb 4, 2008 2:56 PM, Sunburned Surveyor <[EMAIL PROTECTED]> wrote:
> Larry,
>
> I was going to allow the user to select the units throught a pop-up
> menu that could be pulled up on the ZoomBar. I agree that it would be
> better to associate the Unit System with a Task. But if we do this,
> why not assign a Spatial Reference System instead?
>
> But maybe I don't want to get that complicated.
>
> How did you assign the distance unit system to the Task window? Did
> you do this directly in the Task window?
>
> Landon
>
>
> On Feb 4, 2008 12:23 PM, Larry Becker <[EMAIL PROTECTED]> wrote:
> > Hi Sunburned,
> >
> > SkyJUMP has a ZoomBar that displays metric and US units based on the
> > setting of the Task Units. OpenJump doesn't have a method of setting
> > the task units. What are you doing to do to determine it?
> >
> > regards,
> >
> > Larry
> >
> >
> > On Feb 4, 2008 2:18 PM, Sunburned Surveyor <[EMAIL PROTECTED]> wrote:
> > > I'm doing some work at home with the ZoomBar for OpenJUMP. From the
> > > source code comments it appears that some of the supporting code for
> > > the ZoomBar was never fully implemented. The ZoomBar was going to work
> > > with additional code that defined unit systems. (Right now it works
> > > with a model of the metric unit system contained in a collection to
> > > figure out the best label to display to the right of the JSlider on
> > > the zoom bar.)
> > >
> > > I'm in the process of completing the original implementation. This
> > > will involve defining classes/interfaces for units and unit systems.
> > > When complete this will allow the ZoomBar to support labels for units
> > > sytems in addition to the metric unit system. (For example: US Feet
> > > and Latitude/Longitude.)
> > >
> > > I'd like to know the best place to keep this code. I really don't
> > > think it belongs in the same package as the ZoomBar, because it is
> > > pretty generic. Do we have a package I should use for utility code in
> > > OpenJUMP? I was thinking of org.openjump.util.units for this
> > > particular code.
> > >
> > > Are there any objections to that?
> > >
> > > The Sunburned Surveyor
> > >
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<<attachment: units.JPG>>
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