jimagedialog.html

JAVA DEVELOPER’S GUIDE TO ASPRISE JTWAIN Version 9 图象处理

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com.asprise.util.ui</FONT>
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Class JImageDialog</H2>
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<A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A>
  <IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/awt/Component.html" title="class or interface in java.awt">java.awt.Component</A>
      <IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/awt/Container.html" title="class or interface in java.awt">java.awt.Container</A>
          <IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/awt/Window.html" title="class or interface in java.awt">java.awt.Window</A>
              <IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/awt/Dialog.html" title="class or interface in java.awt">java.awt.Dialog</A>
                  <IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/JDialog.html" title="class or interface in javax.swing">javax.swing.JDialog</A>
                      <IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><B>com.asprise.util.ui.JImageDialog</B>
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<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/j2se/1.4.2/docs/api/javax/accessibility/Accessible.html" title="class or interface in javax.accessibility">Accessible</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/awt/image/ImageObserver.html" title="class or interface in java.awt.image">ImageObserver</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/awt/MenuContainer.html" title="class or interface in java.awt">MenuContainer</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/RootPaneContainer.html" title="class or interface in javax.swing">RootPaneContainer</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/java/io/Serializable.html" title="class or interface in java.io">Serializable</A>, <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/WindowConstants.html" title="class or interface in javax.swing">WindowConstants</A></DD>
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<DT>public final class <B>JImageDialog</B><DT>extends <A HREF="http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/JDialog.html" title="class or interface in javax.swing">JDialog</A></DL>

<P>
A dialog allows the user to load images and to perform basic image editing tasks.<br> 
 This component proves to be extremely useful if you need the user to 
 load/browse/edit/specify images in your applications.
 <p><i>Advantages include: </i>
 <ul>
 <li>Multiple image sources supported: local computer, digital cameras, scanners and the web
 <li>Multiple image formats: read and write BMP, PNG, JPG, GIF, PCT, PSD and many other formats
 <li>Platform/Virtual machine independent: Any platform, any Java virtual machine (version 1.3 or above)
 <li>Powerful features: rotation, flipping, scaling, clipping, etc. 
 <li>User friendly as well as developer friendly
 </ul>
 <p>
 The user can <b>load images from local computer or the web</b>, 
 he or she can also <b>acquire images from digital cammeras and scanners</b>. 
 After the image has been loaded, the user can <b>rotate, clip, flip, 
 and scale the image</b>. The image has been loaded and edited, the user can 
 <b>save the image or select the image</b> - which will be used in your applications.  
 <p>
 <i>Sample uses: </i>
 <p>
 <b>1. Modal (synchronous) mode</b>
 <code>
 <pre>
 JImageDialog dialog = new JImageDialog(frame, "Sample", true); // Modal dialog
 BufferedImage image = dialog.showDialog();
 ... 
 </pre>
 </code>
 <p>
 <b>2. Asynchronous mode</b>
 <code>
 <pre>
 public class JImageDialogSample extends JPanel implements JImageDialogListener {
 	  ...
   BufferedImage image; 
  
   // Displays selected image if any. 
   public void paintComponent(Graphics g) {
       super.paintComponent(g); // Paint background. 
       if(image != null)
           g.drawImage(image, 0, 0, null);
   }
 
   // Sets image and refreshes the panel.
 	 public void setImage(BufferedImage image) {
       this.image = image;
       setPreferredSize(getPreferredSize());
       revalidate();
       repaint();
   }
 
   // Methods in JImageDialogListener
   // When the user presses cancel button, this method will be called. 
   public void onCancel() { 
       setImage(null);
   }