📄 gmconvpanelcontroller.java

📁 Gmail API for Java 一个gmail信箱的客户端
💻 JAVA
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package siuying.gm.app.gmailer4j.controller;

import EDU.oswego.cs.dl.util.concurrent.*;
import EDU.oswego.cs.dl.util.concurrent.misc.*;
import siuying.gm.app.gmailer4j.ui.GMConvPanel;
import javax.swing.JPanel;
import siuying.gm.GMConversation;
import java.util.logging.Logger;
import siuying.gm.structure.GMConversationEntry;
import siuying.gm.structure.GMThread;
import javax.swing.SwingUtilities;
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.table.*;

/**
 * GMThreadPanelController
 * Controller of the GMThreadPanel, used to display a conversation,
 * user can navigate through the threads in conversation
 * @author siuying
 * @version 0.2
 */

public class GMConvPanelController {
  private JFrame parent;
  private GMConvPanel panel;
  private GMConversation conversation;
  private Logger logger = Logger.getLogger(GMConvPanelController.class.getName());
  private JFrame frame;

  public GMConvPanelController(JFrame parent) {
    this.parent = parent;

    // setup UI
    frame = new JFrame();
    JPanel contentPane = (JPanel) frame.getContentPane();
    BorderLayout borderLayout1 = new BorderLayout();
    panel = new GMConvPanel();
    frame.setSize(new Dimension(640,480));
    frame.setIconImage(parent.getIconImage());
    contentPane.setLayout(borderLayout1);
    contentPane.add(panel, BorderLayout.CENTER);
    reset();
  }

  public GMConversation getConversation(){
      return conversation;
  }

  public JPanel getPanel(){
    return panel;
  }

  /**
   * Set the conversation of this panel
   * One panel can only display on set of conversation
   */
  public void setConversation(GMConversation conv){
    if (conv == null){
      // no mail message
    }else{
      conversation = conv;
    }
  }

  /**
   * Set the current threads this panel displayed
   * Input parameter must be a valid index of the conversation
   * @param int index index of current conversation
   * @throws IllegalArgumentException If conversation have not been set, or
   *         index is smaller than 0 or larger than conversation index
   */
  public void setCurrentThreads(int index){
    if (conversation == null){
      logger.warning("Set current threads, but no conversation exist!");
      throw new IllegalArgumentException("Set current threads, but no conversation exist!");
    }

    if (conversation.getEntries().size() <= index ||
        index < 0){
      logger.warning("Unexpected index entered, id:" + index);
      throw new IllegalArgumentException("Unexpected index entered, id:" + index);
    }

    GMConversationEntry entry = null;
    try{
      entry = (GMConversationEntry) conversation.getEntries().get(index);
    }catch(ClassCastException cce){
      logger.warning("Unexpected message, class cast exception!");
    }

    // set the current message (finally!)
    if (entry != null){
      String subject = entry.getSubj();
      String sender = entry.getSender();
      String date = entry.getDt();
      String content = entry.getBody();
      setPanelText(subject, sender, date, content);
    }
  }

  /**
   * Pop up a frame display the Threads
   */
  public void show(){
      frame.show();
  }

  /**
   * Reset the text of this panel to default string
   */
  public void reset(){
      setPanelText("Downloading . . . ", "", "", "");
  }

  public void dispose(){
      frame.setVisible(false);
      conversation = null;
      frame.dispose();
  }

  /**
   * Set the string of the panel to those specified
   */
  private void setPanelText(final String subject,
                           final String sender,
                           final String date,
                           final String content){
    // prepare a task run in background
    Runnable r = new Runnable(){
      public void run() {
        frame.setTitle(subject);
        panel.lblDate.setText("<html><b>Date:</b> " + date + "</html>");
        panel.lblSender.setText("<html><b>Sender:</b> " + sender + "</html>");
        panel.lblSubject.setText("<html><b>Subject:</b> " + subject + "</html>");
        panel.txtContent.setText(content);
        logger.info("Current selecting:" + panel.scrollPane.getVerticalScrollBar().getValue());
        logger.info("Setting scroll pane to :" + panel.scrollPane.getVerticalScrollBar().getMinimum() +
                    "; max: " + panel.scrollPane.getVerticalScrollBar().getMaximum());
        scrollTop();
      }
    };

    // run the task
    SwingUtilities.invokeLater(r);
  }

  public void scrollTop(){
      Runnable r = new Runnable(){
          public void run() {
              panel.scrollPane.getVerticalScrollBar().setValue(panel.scrollPane.getVerticalScrollBar().getMinimum());
          }
      };
      SwingUtilities.invokeLater(r);
  }
}
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