J2ME

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MOMTabControl.java：源码内容
							/*
 * MOMTabControl.java
 *
 * Created on April 22, 2010, 12:40 PM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */
package com.MOM.ui.control;
import com.MOM.resources.Resources;
import com.framework.DisplayManager;
import com.framework.EventManager;
import com.framework.HorizontalLayout;
import com.framework.ImageControl;
import com.framework.ListLayout;
import com.framework.ScrollableContainer;
import com.framework.SpacerControl;
import com.framework.UIControl;
import com.sun.midp.lcdui.Resource;
import java.util.Vector;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
/**
 *
 * @author Tejaswi
 */
public class MOMTabControl extends ScrollableContainer implements EventManager{
    
    Vector tabPanes = new Vector();
    ScrollableContainer tabButtonBar;
    HorizontalLayout horLayout = new HorizontalLayout(HorizontalLayout.STRETCH_NONE,4,0,2);
   
    int previousIndex = -1;
    Image backupBgImage;
    private static final int EXTRA_SPACE = 2;
    
    boolean init = false;    
   SpacerControl spacercontrol = new SpacerControl();
    
    /** Creates a new instance of MOMTabControl */
    public MOMTabControl() {
        tabButtonBar = new ScrollableContainer();
        tabButtonBar.setWidth(DisplayManager.getInst().getWidth());
        tabButtonBar.setLayout(horLayout);
        tabButtonBar.setPosition(0 , 2);
        tabButtonBar.setSelectable(false);
        spacercontrol.setBgColor(0x2882b4);
        tabButtonBar.setSelected(false);
        spacercontrol.setWidth(DisplayManager.getInst().getWidth());
        spacercontrol.setHeight(3);
        spacercontrol.setSelectable(false);
        
        setBgColor(0xffffff);
        setSelectionBgColor(0xffffff);
        addChildren(tabButtonBar);
        addChildren(spacercontrol);
        
    }
    public void event(int eventId, Object source, Object data) {
        if(source.equals(tabButtonBar) && eventId == SELECTION_CHANGED)
        {
             selectTab(((Integer)data).intValue());
        }
    }
    public void showNotify() {
        setHeight(DisplayManager.getInst().getCurrentScreen().getBody().getHeight());
        if(!init)
        {
            ImageControl control = new ImageControl(Resources.getInstance().getImage(Resources.SCROLLER_ARROW_IMAGE));
            control.setAllignment(Graphics.HCENTER | Graphics.VCENTER);
            control.setSelectable(false);
            control.setHeight(tabButtonBar.getHeight());
            tabButtonBar.addChildren(control);
            init = true;
        }
        
        if(previousIndex == -1)
        {
            selectTab(0);
        }
        tabButtonBar.setEventManager(this);
        super.showNotify();
    }
    public void hideNotify() {
        for (int i = 0; i < tabPanes.size(); i++) {
             ((MOMTabPane)tabPanes.elementAt(i)).setInitStatus(false);
        }
        super.hideNotify();
    }
    public void addTabPane(MOMTabPane tabPane)
    {
        tabPanes.addElement(tabPane);
        tabButtonBar.addChildren(tabPane.getTabButton());
        tabButtonBar.setHeight(Math.max(tabButtonBar.getHeight() , tabPane.getTabButton().getHeight()));
    }
    public void selectTab(int index)
    {
        if(previousIndex != index)
        {
            // restore old image
            if(previousIndex != -1)
            {
                ScrollableContainer tabPane = getTabPane(previousIndex);
                UIControl tabButton = getTabButton(previousIndex);
                tabButton.setBgImage(backupBgImage);
                tabPane.setSelected(false);
                removeChildren(tabPane);
            }
            previousIndex = index;
            UIControl tabButton = getTabButton(index);
            backupBgImage = tabButton.getBgImage();
            tabButton.setBgImage(tabButton.getSelectionBgImage());
            ScrollableContainer pane = getTabPane(previousIndex);
            spacercontrol.setY(tabButtonBar.getY() + tabButtonBar.getHeight() - 1);
            pane.setHeight(getHeight() - spacercontrol.getY() - spacercontrol.getHeight() - 1 - EXTRA_SPACE);
            pane.setWidth(getWidth());
           
            if(!((MOMTabPane)tabPanes.elementAt(index)).getInitStatus())
            {
                ((MOMTabPane)tabPanes.elementAt(index)).setInitStatus(true);
                pane.setPosition(0 ,spacercontrol.getY() + spacercontrol.getHeight() + EXTRA_SPACE);
                pane.showNotify();
                
            }
            addChildren(pane);
            pane.setSelected(true);
            DisplayManager.getInst().invalidate();
        }
    }
    private UIControl getTabButton(int index)
    {
      
        return ((MOMTabPane)tabPanes.elementAt(index)).getTabButton();
    }    
    private ScrollableContainer getTabPane(int index)
    {
        return ((MOMTabPane)tabPanes.elementAt(index)).getTabPaneBody();
    }
    public boolean keyPressed(int keycode) {
    int gameKey = DisplayManager.getInst().getGameAction(keycode);
    ScrollableContainer tabPane = getTabPane(previousIndex);
    boolean handled = tabPane.keyPressed(keycode);
       if(tabPane.isSelected() && (gameKey == DisplayManager.LEFT || gameKey == DisplayManager.RIGHT) && !handled ) {
            return tabButtonBar.keyPressed(keycode);
        }else{
           return handled;
        }
    }
}

						