Comments on: Setting system tray icons

By: Yair Altman

Yair Altman — Sat, 04 Apr 2009 16:55:24 +0000

wei - you can change the figure icon (not without the JavaFrame), but I'm told this may violate Matlab's license. I'm really not sure why MathWorks (TMW) chose to limit this pretty harmless customization, but there you have it. In all my posts I try to stay on the good side of the line, so I'm afraid I can't help you here... If you have a specific need for a customer project, then perhaps if you approach TMW they'll agree to give you special permission.

By: wei

wei — Fri, 03 Apr 2009 15:05:59 +0000

@Yair, Can one change figure’s icon wihtout JavaFrame?

By: wei

wei — Tue, 31 Mar 2009 22:11:41 +0000

@Yair, That’s nice to know. Thank you.

By: Yair Altman

Yair Altman — Tue, 31 Mar 2009 21:15:15 +0000

@wei - your method is ok for simple filenames - I simply forgot that the ImageIcon constructor also accepts a filename. In practice, within that constructor it calls the awt Toolkit to process the file so there's no performance difference, but obviously the code is more readable/maintainable this way. BTW, you can also use URL images, for example:

jarFile = fullfile(matlabroot,'/java/jar/mwt.jar');
iconsFolder = '/com/mathworks/mwt/resources/';
myIcon = ['jar:file:/' jarFile '!' iconsFolder 'save.gif'];
myIcon = java.net.URL(myIcon);  % not necessary for simple external files
jSave.setIcon(javax.swing.ImageIcon(myIcon));

If you wish to use the icon to set a specific component mouse cursor (hover pointer), you DO need to use the awt.Toolkit:

myIcon = fullfile(matlabroot,'/toolbox/matlab/icons/matlabicon.gif');
imageToolkit = java.awt.Toolkit.getDefaultToolkit;
iconImage = imageToolkit.createImage(myIcon);
hotSpot = java.awt.Point(20,0);   % =Matlab icon point (top) after 16x16=>32x32 resize
myCursor = imageToolkit.createCustomCursor(iconImage,hotSpot,'My Cursor');
jButton.setCursor(myCursor);

By: wei

wei — Tue, 31 Mar 2009 20:16:38 +0000

@Yair,
I bypassed awt and directly went

 iconImage = javax.swing.ImageIcon(myIcon);
 jButton.setIcon(iconImage);

Any difference?

By: Yair Altman

Yair Altman — Tue, 31 Mar 2009 15:23:07 +0000

@wei - assuming your component has a reference handle (let's say jButton), follow this example:

myIcon = fullfile(matlabroot,'/toolbox/matlab/icons/matlabicon.gif');
iconImage = java.awt.Toolkit.getDefaultToolkit.createImage(myIcon);
jButton.setIcon(javax.swing.ImageIcon(iconImage));

By: wei

wei — Tue, 31 Mar 2009 12:39:58 +0000

Hi Yair,
How does one set icon image, e.g. JButton, for uicomponent you posted?

Thank you.

By: Donn Shull

Donn Shull — Wed, 25 Mar 2009 19:01:09 +0000

Hi Yair,

I see in your TODO list that you are planning to cover the schema package. Even though the schema package is undocumented in general there are a lot of examples available in the toolbox directory to give a general sense of how to use it. There is not however a good example of how easy it is to use the schema.class javaInterfaces property to seemlessly access UDD objects from java code. I think people would be interested in that.

Donn