First of all, thank you very much for this great website. So far, together with your 2 books (which I recommend to buy and read), it represents the best resource available about Matlab programming and software development.

I have been trying to use the Waterloo graphics on a Mac with Matlab 2015b, and I have got the following error when running the PlotGallery() test function or one of the available plot examples, either in this blog or in the Waterloo project website:

Error using GXGraph (line 39)
Java exception occurred:
java.lang.NoSuchMethodError: org.jdesktop.swingx.painter.AbstractPainter.setAntialiasing(Z)V
	at org.jdesktop.swingx.JXLabel.initPainterSupport(JXLabel.java:287)
	at org.jdesktop.swingx.JXLabel.(JXLabel.java:230)
	at kcl.waterloo.graphics.GJAxisPanel.(GJAxisPanel.java:64)
	at kcl.waterloo.graphics.GJAxisPanel.(GJAxisPanel.java:147)
	at kcl.waterloo.graphics.GJAxisPanel.createInstance(GJAxisPanel.java:116)
	at kcl.waterloo.graphics.GJAbstractGraph.createAxes(GJAbstractGraph.java:469)
	at kcl.waterloo.graphics.GJGraphContainer.createInstance(GJGraphContainer.java:73)

Error in GXFigure/subplot (line 112)
                varargout{1}=GXGraph(p);

Error in gxgca (line 17)
        h=subplot(currentFigure, 1, 1, 1);

I have tried to install Waterloo in both ways, manually and by using the provided script, but I keep getting the same error. In https://sourceforge.net/p/waterloo/discussion/1113980/thread/d93d580b/ I have also noticed that someone else had the same issue in the past, and after doing what Malcolm suggested in the discussion forum, the error is still there in my case.

I haven’t tried to install and use Waterloo on a Windows platform yet.

Any idea on what could cause that error and how I can fix it?

Thanks a lot,

Nino

@Peter
In waterloodemo comment out line 48:
set(Next.hgcontainer, ‘Opaque’, ‘off’);

In MouseMotionHandler, for all callbacks with “focus_subject” as input, explicitly cast the handle to double with
focus_subject=double(focus_subject)
on the first line of the callback.

waterloodemo should now work.

Other updates are likely to be needed for your own code as HG2 evolves.

Regards
Malcolm

Waterloo (the GUI components) seems to be incompatible with the new HG2, at least in my Matlab version (2012b). For the simplest case, when I run waterloodemo I get a bunch of error messages.

Anyone have any insights?

More detailed; I want to read a .png-image, add it to a MATLAB axis or FXGraph axis and have the possibility to manipulate its position and angle.

@Ben
You are creating a MATLAB annotation, not a Waterloo one, as you set “gcf” as the target. That draws a MATLAB arrow. Change gcc to gr1. Also if a HeadLength is specified you need a HeadWidth too – I’ll look at that.

Change to:

annotation(gr1,'arrow',[0.6 0.5],[0.2 0.4],'HeadLength',4,'HeadWidth', 2, 'LineWidth',5);

to draw a (big) arrow.

here is what I’ve tried

 
f = GXFigure();
x = -5:0.1:5;
gr1 = gxgca();
a1 = line(gr1, x, cos(x), 'LineSpec','-ob');
b1 = line(gr1, x, sin(x), 'LineSpec','-sg');
annotation(gcf,'arrow',[0.6 0.5],[0.2 0.4],'HeadLength',4,'LineWidth',5);
gr1.getObject().getView().autoScale();

the plot works, but not the arrow…