kopia lustrzana https://gitlab.com/sane-project/backends
111 wiersze
3.2 KiB
Java
111 wiersze
3.2 KiB
Java
/* sane - Scanner Access Now Easy.
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Copyright (C) 1997 Jeffrey S. Freedman
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This file is part of the SANE package.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA.
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As a special exception, the authors of SANE give permission for
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additional uses of the libraries contained in this release of SANE.
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The exception is that, if you link a SANE library with other files
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to produce an executable, this does not by itself cause the
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resulting executable to be covered by the GNU General Public
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License. Your use of that executable is in no way restricted on
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account of linking the SANE library code into it.
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This exception does not, however, invalidate any other reasons why
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the executable file might be covered by the GNU General Public
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License.
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If you submit changes to SANE to the maintainers to be included in
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a subsequent release, you agree by submitting the changes that
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those changes may be distributed with this exception intact.
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If you write modifications of your own for SANE, it is your choice
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whether to permit this exception to apply to your modifications.
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If you do not wish that, delete this exception notice. */
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/**
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** ImageCanvas.java - A canvas that displays an image.
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**
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** Written: 11/4/97 - JSF
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**/
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import java.awt.Canvas;
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import java.awt.Dimension;
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import java.awt.Graphics;
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import java.awt.Image;
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import java.awt.image.ImageProducer;
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/*
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* Here's a canvas that just shows an image.
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*/
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public class ImageCanvas extends Canvas
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{
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Image image = null; // The image to display.
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ImageCanvasClient client = null; // 1 client for now.
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/*
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* Create with empty image.
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*/
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ImageCanvas()
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{
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}
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/*
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* Create image from an image producer.
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*/
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void setImage(ImageProducer iprod, ImageCanvasClient c)
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{
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client = c;
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image = createImage(iprod);
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repaint();
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}
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/*
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* Paint.
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*/
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public void paint(Graphics g)
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{
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System.out.println("In ImageCanvas.paint()");
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Dimension dim = getSize();
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g.drawRect(0, 0, dim.width - 1, dim.height - 1);
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if (image != null)
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{
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g.drawImage(image, 1, 1, dim.width - 2, dim.height - 2, this);
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}
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}
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/*
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* Image has been updated.
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*/
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public boolean imageUpdate(Image theimg, int infoflags,
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int x, int y, int w, int h)
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{
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System.out.println("In imageUpdate()");
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boolean done = ((infoflags & (ERROR | FRAMEBITS | ALLBITS)) != 0);
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// repaint();
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paint(getGraphics());
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if (done && client != null) // Tell client when done.
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{
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client.imageDone((infoflags & ERROR) != 0);
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client = null;
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}
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return (!done);
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}
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}
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