1. Tapping the period key on the keyboard: In case you see the cursor still visible on the screen while you are watching a video or movie, then you have to tap the period key on the keyboard. It will help you to hide the cursor from view instantly.
It appears that the Cursor
class does not have a "blank" cursor to begin with, so one could define a new "blank" cursor using the Toolkit.createCustomCursor
method.
Here's one way I've tried which seems to work:
// Transparent 16 x 16 pixel cursor image.
BufferedImage cursorImg = new BufferedImage(16, 16, BufferedImage.TYPE_INT_ARGB);
// Create a new blank cursor.
Cursor blankCursor = Toolkit.getDefaultToolkit().createCustomCursor(
cursorImg, new Point(0, 0), "blank cursor");
// Set the blank cursor to the JFrame.
mainJFrame.getContentPane().setCursor(blankCursor);
Edit
Regarding the comment about everything inside the JFrame
ending up without a cursor, it seems that the Component
s which are contained in the JFrame
will end up inheriting the cursor of the container (the JFrame
), so if it is a requirement to have a certain Component
have the cursor appear, one would have to manually set the desired cursor.
For example, if there is a JPanel
contained in the JFrame
, then one could set the cursor of that JPanel
to the system's default using the Cursor.getDefaultCursor
method:
JPanel p = ...
// Sets the JPanel's cursor to the system default.
p.setCursor(Cursor.getDefaultCursor());
tl;dr AWT Toolkits are still bugged in 2017'; the proper solution is thus to call
w.setCursor( w.getToolkit().createCustomCursor(
new BufferedImage( 1, 1, BufferedImage.TYPE_INT_ARGB ),
new Point(),
null ) );
instead.
As per Javadoc page for createCustomCursor
,
Creates a new custom cursor object. If the image to display is invalid, the cursor will be hidden (made completely transparent), and the hotspot will be set to (0, 0).
It would follow from that that
w.setCursor( w.getToolkit().createCustomCursor( null, null, null ) );
should do the trick. Sadly, there is a bug related to this case NOT handled by the code, see e.g. http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7150089 (this particular is for MacOS, but by browsing the source you may easily find that there's no checking for 1st param Image
value validity in any of the Toolkit
platform implementations; there's tracker.isErrorAny()
checking, which doesn't do it's job in this case), so passing null
or invalid Image
simply throws a NPEx.
When using the LWJGL under Mac OS you need to do this:
System.setProperty("apple.awt.fullscreenhidecursor","true");
frame.setCursor(frame.getToolkit().createCustomCursor(
new BufferedImage(3, 3, BufferedImage.TYPE_INT_ARGB), new Point(0, 0),
"null"));
In the documentation it says that if the image is invalid, then it will be transparent by default so therefore passing an empty image will result in a transparent cursor. But Passing null
into the method for the image will result in an exception.
Toolkit tk= getToolkit();
Cursor transparent = tk.createCustomCursor(tk.getImage(""), new Point(), "trans");
I solve this problem much easier:
final Timer cursorTimer = new Timer(2000, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
getContentPane().setCursor(null);
}
});
cursorTimer.start();
addMouseMotionListener(new MouseMotionAdapter() {
@Override
public void mouseMoved(MouseEvent e) {
getGlassPane().setCursor(Cursor.getDefaultCursor());
cursorTimer.restart();
}
});
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