Drawpolygon not working with geoaxes

Hi,

I am developing a GUI with app designer, when I want to enable users to select a region interactively on a geoaxes. I am using the drawpolygon function, which does not seem to work with geoaxes (it works on a regular axis). I get following error:

Warning: Error occurred while executing the listener callback for event WindowMousePress defined for class matlab.ui.Figure:

Dot indexing is not supported for variables of this type.

Error in imageslib.internal.app.utilities.isAxesInteractionModeActive (line 17)

TF = ax.InteractionContainer.CurrentMode ~= "none";

Error in images.roi.internal.ROI/isModeManagerActive

Error in images.roi.internal.ROI/waitForButtonPressToBegin

Error in images.roi.internal.ROI

is drawpolygon not available for geoaxes or is there an option I need to set correctly for this axes type. Any help would be appreciated.

Thanks!

Murat

Answer 1

[Adam Danz]

This is supported in the latest release, MATLAB R2022b.

The example below produced the results you described when run in R2022a but is functional in R2022b.

uif = uifigure();
gx = geoaxes(uif);
drawpolygon(gx)

[Murat Panayirci]

thank you Adam. So I can't use it until I switch to the latest version.

Can you think of any workaround which I can use meanwhile, e.g. anything that would enable someone to mark a region on a geoaxes interactively with mouse?

cheers,

Murat

[Adam Danz]

Can you think of any workaround

Assuming it's not possible to update to 22b, you could replace the uifigure with a regular figure and it will work in 22a.

fig = figure();
gx = geoaxes(fig);
drawpolygon(gx)

If this is within an app, then it gets more complicated. You'd need to generate the figure outside of the app, using a regular figure as shown above. copyobj may come in handy to copy the entire axes from your uifigure to a regular figure. Then, when the drawpolygon actions are done, you could copy the results to the axes in your app and close the external figure.

[Murat Panayirci]

ok thank you for the explanation Adam.