Hi Ian,
The classes you'd need to adjust are in the com.bbn.openmap.omGraphics.editable package. For OMLine editing, look at the LineStateMachine, which controls the states that control mouse behavior.
It sounds like you want to add something like a PolyAddPointState to the LineStateMachine state array, and get the LineStateMachine to that state instead if going right to the edit state.
I think your users are right, the other OMGraphics need to be modified so if the first mouse action is a click, the subsequent mouse motion action acts like the mouse dragged works now for after a mouse pressed. I'll add this to the list, but there are a couple of things ahead of it I need to take care of first. If you tackle it and need some help, feel free to write.
Hope this helps,
- Don
On Sep 10, 2012, at 9:45 AM, Renton Ian wrote:
> Hi everyone,
>
> Our software (based on OpenMap) allows the user to add objects to their map using a DrawingTool. Previous versions of our software only offered objects that were variations on OMPoint and OMPoly (as a PolyLine), for which the drawing tool behaviour is "click where you want a point".
>
> Our new version includes the ability to draw things based on a single line, for which we have used the OMLine drawing tool. This tool's behaviour is "click and hold the start point, then drag and release at the end point".
>
> Usability testers have found this behaviour quite unexpected, and have struggled to draw the line precisely on a laptop touchpad.
>
> Is there any way built into OpenMap to draw an OMLine using one click at the start and one at the end (or alternatively, to constrain a PolyLine so that it has exactly two points and drawing automatically finishes after clicking the second point)?
>
> If not, could anyone offer any advice as to where in the OpenMap drawing system I would have to start modifying/subclassing in order to achieve this?
>
> Thanks,
>
> Ian
>
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Received on Tue Sep 11 2012 - 19:54:04 EDT