keyinputscreen.java

這程式是用J2ME撰寫而成

/*
wiseremote - a client/server remote control system for wireless devices
Copyright (C) 2005 Martin Profittlich

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

import java.lang.*;
import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;


class KeyInputScreen extends Canvas implements CommandListener
{
  private Image image;

  public KeyInputScreen ()
    {
      super ();
      String fix = WiseremoteMIDlet.instance.getAppProperty ("fix6230");
      if (fix != null)
        {
          addCommand (new Command ("Select", Command.CANCEL, 1));
          addCommand (new Command ("Back", Command.BACK, 1));
        }
      else
        {
          addCommand (new Command ("Select", Command.OK, 1));
          addCommand (new Command ("Back", Command.BACK, 1));
        }
      setCommandListener (this);
    }

  public void setImage (Image i)
    {
      image = i;
    }

  protected void keyRepeated (int keyCode)
    {
      keyEvent (keyCode, "REP_");
    }

  protected void keyReleased (int keyCode)
    {
      keyEvent (keyCode, "REL_");
    }
  protected void keyPressed (int keyCode)
    {
      keyEvent (keyCode, "");
    }
     
  private void keyEvent (int keyCode, String prefix)
    {
      switch (keyCode)
        {
          case KEY_NUM1:
              WiseremoteMIDlet.instance.protocol.exec (prefix + "1");
              break;
          case KEY_NUM2:
              WiseremoteMIDlet.instance.protocol.exec (prefix + "2");
              break;
          case KEY_NUM3:
              WiseremoteMIDlet.instance.protocol.exec (prefix + "3");
              break;
          case KEY_NUM4:
              WiseremoteMIDlet.instance.protocol.exec (prefix + "4");
              break;
          case KEY_NUM5:
              WiseremoteMIDlet.instance.protocol.exec (prefix + "5");
              break;
          case KEY_NUM6:
              WiseremoteMIDlet.instance.protocol.exec (prefix + "6");
              break;
          case KEY_NUM7:
              WiseremoteMIDlet.instance.protocol.exec (prefix + "7");
              break;
          case KEY_NUM8:
              WiseremoteMIDlet.instance.protocol.exec (prefix + "8");
              break;
          case KEY_NUM9:
              WiseremoteMIDlet.instance.protocol.exec (prefix + "9");
              break;
          case KEY_NUM0:
              WiseremoteMIDlet.instance.protocol.exec (prefix + "0");
              break;
          case KEY_POUND:
              WiseremoteMIDlet.instance.protocol.exec (prefix + "#");
              break;
          case KEY_STAR:
              WiseremoteMIDlet.instance.protocol.exec (prefix + "*");
              break;
          default:
              if (getGameAction (keyCode) == Canvas.UP) 
                {
                  WiseremoteMIDlet.instance.protocol.exec (prefix + "UP");
                }
              if (getGameAction (keyCode) == Canvas.DOWN)
                {
                  WiseremoteMIDlet.instance.protocol.exec (prefix + "DOWN");
                }
              if (getGameAction (keyCode) == Canvas.LEFT)
                {
                  WiseremoteMIDlet.instance.protocol.exec (prefix + "LEFT");
                }
              if (getGameAction (keyCode) == Canvas.RIGHT)
                {
                  WiseremoteMIDlet.instance.protocol.exec (prefix + "RIGHT");
                }
              break;
        }
      repaint ();
    }

  public void commandAction (Command c, Displayable d)
    {
      if (c.getLabel () == "Select")
        {
          WiseremoteMIDlet.instance.protocol.exec ("SELECT");
        }
      if (c.getLabel () == "Back")
        {
          WiseremoteMIDlet.instance.protocol.exec ("BACK");
        }
    }

  protected void paint (Graphics g)
    {
      if (image == null)
        {
          g.setColor (255, 255, 255);
          g.fillRect (0, 0, getWidth (), getHeight ());
          g.setColor (0, 0, 0);
          g.drawString ("No Image", 2, 2, Graphics.TOP|Graphics.LEFT);
        }
      else
        {
          g.drawImage (image, 
                  getWidth () / 2 - image.getWidth () / 2, 
                  getHeight () / 2 - image.getHeight () / 2, 
                  Graphics.TOP|Graphics.LEFT);
        }
    }
}