package edu.ctgu.JTwacker;
import java.awt.BorderLayout;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JToolBar;
import javax.swing.SwingUtilities;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageDecoder;
import edu.ctgu.twain.JTwain;
/*
这是显示扫描图片的frame
*/
public class JTwacker extends JFrame {
class JPEGPanel extends JPanel {
/** Image for the inner class
*/
protected BufferedImage mJPEGPanelBufferedImage;
/** Pnale to diaply the image
*/
public JPEGPanel() {
// no op
}
/** Sets the bufferedimage into the class
* @param bi BufferedImage
*/
public void setBufferedImage(BufferedImage bi) {
if (bi == null) {
return;
}
mJPEGPanelBufferedImage = bi;
Dimension d = new Dimension(mJPEGPanelBufferedImage.getWidth(this),
mJPEGPanelBufferedImage.getHeight(this));
setPreferredSize(d);
reva lidate();
repaint();
}
/** Paints the component.
* @param g Graphics object used for the painting
*/
public void paintComponent(Graphics g) {
super.paintComponent(g);
Dimension d = getSize();
g.setColor(getBackground());
g.fillRect(0, 0, d.width, d.height);
if (mJPEGPanelBufferedImage != null) {
g.drawImage(mJPEGPanelBufferedImage, 0, 0, this);
}
}
}
protected JPEGPanel mJpegPanel;
protected BufferedImage mBufferedImage;
protected JComboBox mSourcesCombo;
protected JToolBar mToolBar;
/** Constructor
*/
public JTwacker() {
super("测试");
mJpegPanel = new JPEGPanel();
JScrollPane ps = new JScrollPane(mJpegPanel,
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
getContentPane().add(ps, BorderLayout.CENTER);
WindowListener wndCloser = new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
};
addWindowListener(wndCloser);
mToolBar = new JToolBar("Twain");
mToolBar.setFloatable(false);
addButtons();
getContentPane().add(mToolBar, BorderLayout.NORTH);
setSize(800, 600);
/* Center the frame */
Dimension screenDim = Toolkit.getDefaultToolkit().getScreenSize();
Rectangle frameDim = getBounds();
setLocation(
(screenDim.width - frameDim.width) / 2,
(screenDim.height - frameDim.height) / 2
);
setVisible(true);
}
protected void addButtons(){
JButton _ab = new JButton("扫描");
_ab.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
acquireImage();
}
});
mToolBar.add(_ab);
mToolBar.addSeparator();
if (edu.ctgu.twain.JTwain.getInstance().isTwainAvailble()) {
String[] twainSources = JTwain.getInstance().getAvailableSources();
if (twainSources != null) {
mSourcesCombo = new JComboBox(twainSources);
} else {
mSourcesCombo = new JComboBox();
mSourcesCombo.addItem("");
}
} else {
mSourcesCombo = new JComboBox();
mSourcesCombo.addItem("");
}
mToolBar.add(mSourcesCombo);
}
protected void acquireImage() {
if (JTwain.getInstance().isTwainAvailble()){