Zoom and Data Cursor callbacks used with saved figures

Hy Guys,

I have the 'main' method where I plot a figure and I call two callbacks: one for zoom and one for data cursor:

function myMainFunction()

...

% plot normalized points

s = scatter(sensorSNorm, sensorDNorm, 20, [colorMatrixCurrent(:,1) colorMatrixCurrent(:,2) colorMatrixCurrent(:,3)], 'o', 'filled');

s.MarkerEdgeColor = 'k';

hcb = colorbar('YTickLabel', tempCellArray);

colormap(colorsColormap);

noColors = length(tempCellArray);

dy = 1/noColors/2;

Tick = linspace(0+dy, 1-dy, noColors);

set(hcb,'YTick',Tick);

xlabel('S[%]');

ylabel('D[%]');

% callback for data cursor

dcm_obj = datacursormode(gcf);

set(dcm_obj,'UpdateFcn',{@UpdateDataCursorSD, handles.parametersFromFile.time(currentIndex,1)})

% callback for zooming

hZoom = zoom(gcf);

set(hZoom, 'ActionPostCallback', {@UpdateColorMap, handles});

end

When I run myMainFunction and I apply the zooming and the data cursor on the generated figure, both zooming and datacursor work as expected.

But if I save the figure and I open it later by double clicking it, the zooming doesn't work anymore, but the data cursor does. Moreover, the breakpoint that I set in the UpdateDataCursorSD callback method is reached while using the data cursor on the figure, but the breakpoint in UpdateColorMap is never reached when zooming on the saved figure.

Do you have any idea why the zooming does not work on the figure that I open without running myMainFunction?

Thank you, Irina

Answer 1

[Jan]

Note that the elements of the figure have new handles after loading. Then

hZoom = zoom(gcf);
set(hZoom, 'ActionPostCallback', {@UpdateColorMap, handles});

should be destroyed. This means that you cannot store a zoom function such, that it is restored by a load command. You need to re-create it dynamically.

[Irina Vermesan]

Thanks, Jim. There are two things I do not understand now:

1. if the elements of the figure have new handles, how come the data cursor callback still works on the new handles?

2. any suggestions on how to dynamically recreate the zoom function?

Thank you.

[Jan]

Who is Jim?

You can use the debugger to find the explanation: Set a breakpoint and try to find out, from where it is called. If e.g. gcbo is used there, it does not depend on a fixed content of a handle.

Add a CreateFcn, which is called during opening the figure:

FigH = figure('CreateFcn', @myOpenCallback);
savefig(FigH, 'test.fig');
close(FigH);
disp('Closed');
openfig((test.fig');
disp('Opened');

and the callback function:

function myOpenCallback(FigH, EventData)
disp('Hello');

Inside this callback you can initialize the zooming again.