Re: Saving canvas
On 29 Lip, 19:24, Knute Johnson <nos...@rabbitbrush.frazmtn.com>
Hi. I have a problem with saving canvas to file. All over net there
are faqs on how to save a NEW canvas to file (after drawing on it). I
have a canvas, what should i do in order to save what's currently on
it to a file?
Do you want to save a canvas or some sort of image to the file? Canvas
is Serializable so you can write it to a file using ObjectOutputStream.
That may or may not allow you to recreate what was drawn on the
Canvas. If what you want is an image saved to a file, you should draw
on a BufferedImage and save that to the file using ImageIO. You can
display the BufferedImage on your Canvas.
I've noticed a lot of examples in the web on how to save bufferedimage
to file, which, in answer to Your question, is my goal. I just wanted
to find out if there is any way of saving the image directly from
canvas. Thank You for Your answer.
If the only drawing on your Canvas is done in the paint() method you
could use that method to draw onto the BufferedImage. The technique
would be to get a draw Graphics for the BufferedImage and then call
paint() with that Graphics. If your drawing is going to be from user
interaction then using the BufferedImage as your drawing surface and
displaying that to the user makes more sense. Of course in the first
case above, serializing the Canvas would work too.
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