Invisible cursor and X 11

Java 2D
#1

Trying to hide the cursor with JDK1.5.0 on linux, I get

Exception in thread “main” java.lang.ExceptionInInitializerError
at apollo.Surface.(Surface.java:59)
at test.TestLevel.run(TestLevel.java:69)
at test.TestLevel.main(TestLevel.java:54)
Caused by: java.lang.IndexOutOfBoundsException: invalid hotSpot
at sun.awt.CustomCursor.(CustomCursor.java:61)
at sun.awt.X11CustomCursor.(X11CustomCursor.java:26)
at sun.awt.X11.XCustomCursor.(XCustomCursor.java:27)
at sun.awt.X11.XToolkit.createCustomCursor(XToolkit.java:742)
at apollo.CursorManager.createInvisibleCursor(CursorManager.java:68)
at apollo.CursorManager.(CursorManager.java:37)
… 3 more

The code looks like this:
private static Cursor createInvisibleCursor()
{
// Create the invisible cursor
MemoryImageSource memIm = new MemoryImageSource(1, 1, new int[] { 0 }, 0, 1);
Component c = new Component() { };
Image im = c.createImage(memIm);
Point spot = new Point(1, 1);
return c.getToolkit().createCustomCursor(im, spot, INVISIBLE_CURSOR_NAME);
}

Has anybody experienced the same problem ? Any solution ?

#2

It looks like you’re creating a 1x1 image, and trying to use 1,1 point as a hotspot. (1,1) is out of bounds for a 1x1 image.
You should use 0,0 instead.

#3

Thanks,

Actually what surprised me is that the same code worked with JDK 1.4.2 (Windows). I guess something has changed in the JDK 1.5 that now exposes my misuse of the hotspot.

#4

I’m guessing that the awt team has fixed some bug, so now the exception is thrown if the hotspot is invalid…

#5

But… it shouldn’t be invalid!!! A hotspot can be anywhere relative to the actual image really… even outside of it.

Cas :slight_smile:

#6

you have a Point there.

#7

That’s why I shouldn’t be allowed to answer non-java2d related questions, at least, w/o reading the javadoc first =)

Looks like it could be a new bug, likely to be caused by XAWT, assuming the Dimension returned by getBestCursorSize is more than 0x0- see the javadoc for createCustomCursor.

Try running your app with -Dawt.toolkit=sun.awt.motif.MToolkit
to see if it works with motif toolkit.