Change The Mouse Cursor In Java

**Nemesis89** · February 24th, 2014, 07:38 AM

Hello! I'm doing a little play and among the many things I decided to change the mouse cursor based on the theme of the game.
This is the code that I wrote for the declaration of the cursor:

         ImageIcon imageIcon = new ImageIcon ("cursor / cursor.gif"); 
         Image img = imageIcon.getImage (); 
         Toolkit t = Toolkit.getDefaultToolkit (); 
         Cursor cursor = t.createCustomCursor (img, new Point (0,0), "cur"); 
         this.setCursor (cursor);

Having to click on different JButton in the menu of the game, a few screens later, I have to manage something in particular, such as determining the point of clicks that allows the action to take place?

--- Update ---

In particular I would like to change the point of hotspots. The size of 136x163 is cursor.gif

Image - TinyPic - Servizio di hosting d'immagini, condivisione immagini & hosting di video gratuito

As you can see in the image I want to create the point of hotspots in the red dot of the image. How should I do to pass the correct coordinates in Point?

**andbin** · February 24th, 2014, 07:51 AM

Originally Posted by Nemesis89

In particular I would like to change the point of hotspots. The size of 136x163 is cursor.gif

One important note: the cursor cannot have any dimension you like! The real effective size is determined by S.O./hardware settings and/or limits.
Toolkit has the getBestCursorSize method to find the supported cursor dimension.
If you create a Cursor with a larger image, this image is resized to fit that dimension. And this would also require a recalculation of the hotspot.

**Nemesis89** · February 24th, 2014, 08:17 AM

Thanks anyway for the clarification, but I don't want the cursor has this dimension, I wrote for information, in fact, writing code on the back has been adapted to the classical size of the cursor. My question is another: make sure that the point of hotspot is at a given point (as seen in the image) and not (0,0)

**andbin** · February 24th, 2014, 08:19 AM

Originally Posted by Nemesis89

as seen in the image

Sorry, image access at tinypic is forbidden ... at least for me at this moment.

**Nemesis89** · February 24th, 2014, 09:59 AM

Now it is visible?

cursor.gif

**andbin** · February 24th, 2014, 11:57 AM

Originally Posted by Nemesis89

Now it is visible?

Yes but ... I still don't understand your necessity/problem. I see a 136x163 pixels image. Is this the cursor image you load? As I told before, you cannot have a 136x163 cursor.
If you create a correct cursor image (typical/common is 32x32), you can assign the hotspot at any location in (0,0)...(31,31). But this is an implicit knowledge that you must have on the cursor image. If you pass e.g. new Point (10,13) it's because you know that the cursor hotspot is at that point. Nor the image file, nor the java.awt.Image object, nor AWT/Swing in general can have/discover this knowledge in some way.

**Nemesis89** · February 24th, 2014, 12:24 PM

I agree with what you said.
This image is loaded and displayed as a normal cursor.
If I had this same image of size 32x32 I could have the point of hotspots at the point indicated by me in the picture? Is a possible thing that I would do?

**andbin** · February 24th, 2014, 12:39 PM

Originally Posted by Nemesis89

I agree with what you said.
This image is loaded and displayed as a normal cursor.
If I had this same image of size 32x32 I could have the point of hotspots at the point indicated by me in the picture? Is a possible thing that I would do?

See this for example:

This image has no alpha channel, so it's not good as cursor. But just for example.

The top of the index finger is not at (0,0) but at (12,5) .... so in the point object you know to put new Point(12,5)

**Nemesis89** · February 24th, 2014, 12:50 PM

The example is very clear, that's fine and I understand, but do you think I can / is correct that I want my object point in the red dot in the image?
And if I can, how do I determine the point (for example, the (12,5) said it yourself)?

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