Source Code : Form Scroll

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Form Scroll

/*--------------------------------------------------
* FormScroll.java
*
* Show how a Form component handles scrolling
* when multiple Items are on the display
*
* Copyright John W. Muchow   http://www.CoreJ2ME.com
* You may use/modify for any non-commercial purpose
*-------------------------------------------------*/
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class FormScroll extends MIDlet implements CommandListener
{
  private Display display;      // Reference to display object 
  private Form frmMain;         // The main form
  private Command cmdExit;      // Command to exit
  private TextField txfSize;    // Product size
  private ChoiceGroup chgEmail; // Choice group
  private Gauge gauVolume;      // Volume

  public FormScroll()
  {
    display = Display.getDisplay(this);

    // Create TextField
    txfSize = new TextField("Size", "Large", 5, TextField.ANY); 
    
    // Create an exclusive (radio) choice group, and append entries
    chgEmail = new ChoiceGroup("Email Options", Choice.EXCLUSIVE);
    chgEmail.append("Read", null);
    chgEmail.append("Forward", null);    
    chgEmail.append("Delete", null);    

    // Create the gauge
    gauVolume = new Gauge("Sound Level", true, 30, 4);
    
    cmdExit = new Command("Exit", Command.EXIT, 1);

    // Create the form
    frmMain = new Form("Form Stuff");
    frmMain.append(txfSize);
    frmMain.append(chgEmail);
    frmMain.append(gauVolume);    
    frmMain.addCommand(cmdExit);
  
    // Capture events
    frmMain.setCommandListener(this);    
  }

  // Called by application manager to start the MIDlet.
  public void startApp()
  {
    display.setCurrent(frmMain);
  }

  public void pauseApp()
  { }
  
  public void destroyApp(boolean unconditional)
  { }

  public void commandAction(Command c, Displayable s)
  {
    if (c == cmdExit)
    {
      destroyApp(false);
      notifyDestroyed();
    }
  }
}


           
       

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