MATLAB: Colormapeditor() for UIAxes in App Designer

app designercolormapcolormapeditoruiaxesuifigure

I am curious whether or not there is a way that I can edit a colormap for a UIAxes component using the "colormapeditor". I have an app designer app that plots a colormap, and would like a simple solution for allowing the user to edit the map. I am able to perform these edits on a normal figure, but no luck on app.UIAxes. I currently have a menu option callback that calls colormapeditor(app.UIAxes). I do not receive an error, colormapeditor opens and a separate blank figure opens alongside it. What am I missing here? Thank you!!!

Best Answer

Set the UIFigure's HandleVisibility to ON prior to initializing colormapeditor. Then turn HandleVisibility back off afterwards.

app.UIFigure.HandleVisiblity = 'on'; 
colormapeditor

When finished,

app.UIFigure.HandleVisiblity = 'off';

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x = 1:10;
y = sin(x);
plot(app.UIAxes,x,y);

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The problem is that this plotting function does not allow you to supply an existing axes handle as input so it relies on finding the current axes. By default, the handle visibiliity of UIFIgures is off so the axes within those figures are not discoverable.

From r2020a and later, you need to set the app's handle visibility to on so that the app's axes can be detected as "current". Then make the app's axes "current". Then, you can run the plotting function which will access your app's axes.

% app.UIFigure is the handle to your app's figure
% app.UIAxes is the handle to the app's axes 
% 1) Turn on the app figure's handle visibility. 
     app.UIFigure.HandleVisibility = 'on'; 
% 2) Make the app's axes current
     set(0, 'CurrentFigure', app.UIFigure)
     set(app.UIFigure,'CurrentAxes',app.UIAxes)
% 3) call the plotting function 
    dendrogram(__);
% 4) set app figure handles back to invisible (optional, but recommended)
    app.UIFigure.HandleVisibility = 'off';

Best Answer

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