Predefined shapes - Enhancement suggestion

[Alex870]

I'd like to suggest an enhancement of locking the drawing process to using predefined shapes like circles and rectangles etc, This would be in addition to the existing capability of drawing a free-form area.

There might be a new API method added for selecting a defined shape like a circle, for instance. Then the user would click the center point on the map and then click a second time some distance away to define the radius.

I've not seen anything like this from other plugins and it would be a fantastic addition to the great functionality you already have. Great work!

[sandropibia]

Hi Alex,

I can add the functionality, but time is sparse. So it would in the next release, say first quarter of 2018. Do you have any additional suggestions?

Thanks in advance

[Alex870]

Hi, I certainly understand about limited time! Yes I did have another suggestion: I had to add a custom hook to the end of the _doMouseUp function, so I could trigger some code to disable further shape selection and also run some other housekeeping functions within the application.

Some details on the use case should make the reason for doing this clearer: when the user ctrl-clicks on the map, it enables your plugin to allow the drawing of a one-time region. Once the region is drawn, then the drawing mode automatically disables (selectfeature.disable called) until the user does another ctrl-click to begin a new selection.

I think this highlights the potential utility of adding some call-back hooks at the end of the various mouse events you're consuming: MouseUp and MouseDown would seem to be the most useful.

Perhaps something like this could be invoked to register custom hook functions to be called:

selectfeature.eventRegister({
   onMouseUp: <custom function #1>,
   onMouseDown: <custom function #2>
});

To unregister a custom function, passing in a null could work. Anyway, it's just a post implementation thought to consider..

Many thanks
-Alex

[sandropibia]

Hi Alex, about the features you describe to use predefined shapes, maybe I could trigger you to contribute to the project if you like.

[sandropibia]

I think a free shape to select objects is more convinient.
Closing this issue