simplelist.java

Sony Ericsson手机上的Facebook客户端全套代码

// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) 
// Source File Name:   SimpleList.java

package com.sonyericsson.fb.ui.fbComponents;

import java.util.Vector;
import se.southend.drops.gui.BitmapSprite;
import se.southend.drops.integeraffector.*;
import se.southend.drops.scene.Group;
import se.southend.drops.scene.Node;
import se.southend.drops.screen.KeyHandler;

// Referenced classes of package com.sonyericsson.fb.ui.fbComponents:
//            ListItem

public class SimpleList extends Group
{

    public SimpleList()
    {
        mSelectorFollow = null;
        mFirstFocusable = -1;
        mFireIsDown = false;
        mItems = new Group();
        mSelectorGroup = new Group();
        mSelectorGroup.setVisible(false);
        mBackground = new Group();
        add(mBackground);
        add(mSelectorGroup);
        add(mItems);
        mWrapEnabled = true;
    }

    public void setSelector(BitmapSprite selector)
    {
        if(selector != null)
        {
            mSelector = selector;
            mSelectorGroup.add(selector);
            mSelectorFollow = new FollowAffector(1) {

                public void run()
                {
                    mSelector.setWorldPosition(0, getValue());
                }

            };
            mSelectorFollow.setSourceSpeed(20);
            AffectorHandler.getInstance().addAffector(mSelectorFollow);
        }
    }

    public int indexOf(ListItem item)
    {
        return mItems.getChildren().indexOf(item);
    }

    public ListItem get(int index)
    {
        return (ListItem)mItems.getChild(index);
    }

    public boolean isEmpty()
    {
        return mItems.getChildCount() == 0;
    }

    public void next()
    {
        if(isEmpty())
            return;
        int newIndex = mCurrent != mItems.getChildCount() - 1 ? mCurrent + 1 : 0;
        if(!mWrapEnabled && newIndex == 0)
            return;
        if(((ListItem)mItems.getChild(newIndex)).isFocusable())
        {
            if(newIndex < mCurrent)
                select(newIndex, true);
            else
                select(newIndex, false);
        } else
        if(mFirstFocusable != -1)
        {
            mCurrent = newIndex;
            next();
        }
    }

    public void previous()
    {
        if(isEmpty())
            return;
        int newIndex = mCurrent != 0 ? mCurrent - 1 : mItems.getChildCount() - 1;
        if(!mWrapEnabled && newIndex == mItems.getChildCount() - 1)
            return;
        if(((ListItem)mItems.getChild(newIndex)).isFocusable())
        {
            if(newIndex > mCurrent)
                select(newIndex, true);
            else
                select(newIndex, false);
        } else
        if(mFirstFocusable != -1)
        {
            mCurrent = newIndex;
            previous();
        }
    }

    public void select(ListItem item, boolean instant)
    {
        if(mItems.getChildren().contains(item))
            select(mItems.getChildren().indexOf(item), instant);
    }

    public void selectFirst()
    {
        select(mFirstFocusable, true);
    }

    public void select(int index, boolean instant)
    {
        if(mCurrentItem != null)
            mCurrentItem.setFocused(false);
        if(mSelector != null)
            if(instant)
                mSelectorFollow.setSourceSpeed(64);
            else
                mSelectorFollow.setSourceSpeed(20);
        ListItem item = (ListItem)mItems.getChild(index);
        mCurrent = index;
        mCurrentItem = item;
        mCurrentItem.setFocused(true);
        if(mSelector != null)
            mSelectorFollow.setTargetPosition(new int[] {
                mCurrentItem.getLocalY()
            });
    }

    public void add(ListItem item)
    {
        int yPos;
        if(isEmpty())
        {
            yPos = item.getHeight() / 2;
            mSelectorGroup.setVisible(true);
        } else
        {
            ListItem lastItem = (ListItem)mItems.getChild(mItems.getChildCount() - 1);
            yPos = lastItem.getLocalY() + (lastItem.getHeight() / 2 + item.getHeight() / 2 << 8);
        }
        item.setListPosition(yPos);
        mItems.add(item);
        if(mFirstFocusable == -1 && item.isFocusable())
            mFirstFocusable = mItems.getChildCount() - 1;
    }

    public void remove(ListItem item)
    {
        int listIndex = -1;
        int i = 0;
        do
        {
            if(i >= mItems.getChildCount())
                break;
            if(mItems.getChild(i) == item)
            {
                listIndex = i;
                break;
            }
            i++;
        } while(true);
        if(listIndex < 0)
            return;
        mItems.remove(item);
        if(mFirstFocusable == listIndex)
            mFirstFocusable = -1;
        if(mCurrentItem == item)
        {
            item.setFocused(false);
            mCurrentItem = null;
            mCurrent = 0;
        } else
        if(mCurrent > listIndex)
            mCurrent--;
        for(i = listIndex; i < mItems.getChildCount(); i++)
        {
            ListItem oldItem = (ListItem)mItems.getChild(i);
            int yPos;
            if(isEmpty())
            {
                yPos = oldItem.getHeight() / 2;
            } else
            {
                ListItem lastItem = (ListItem)mItems.getChild(mItems.getChildCount() - 1);
                yPos = lastItem.getLocalY() + (lastItem.getHeight() / 2 + oldItem.getHeight() / 2 << 8);
            }
            oldItem.setListPosition(yPos);
            if(mFirstFocusable == -1 && oldItem.isFocusable())
                mFirstFocusable = i;
        }

    }

    public boolean input(KeyHandler keyHandler)
    {
        boolean handled = false;
        if(keyHandler.wasPressed(16))
        {
            if(mFireIsDown)
                return true;
            mFireIsDown = true;
        } else
        if(!keyHandler.isHeld(16))
            mFireIsDown = false;
        if(mItems.getChildCount() > 0)
            handled = ((ListItem)mItems.getChild(mCurrent)).input(keyHandler);
        if(!handled)
        {
            if(keyHandler.wasPressed(8))
            {
                next();
                return true;
            }
            if(keyHandler.wasPressed(4))
            {
                previous();
                return true;
            }
        }
        return false;
    }

    public int getSize()
    {
        return mItems.getChildCount();
    }

    public void setWrappingEnabled(boolean enabled)
    {
        mWrapEnabled = enabled;
    }

    public BitmapSprite getSelector()
    {
        return mSelector;
    }

    protected Group getItems()
    {
        return mItems;
    }

    protected Group getBackground()
    {
        return mBackground;
    }

    public ListItem getCurrentItem()
    {
        return mCurrentItem;
    }

    public int getCurrentIndex()
    {
        return mCurrent;
    }

    private Group mItems;
    private Group mSelectorGroup;
    private BitmapSprite mSelector;
    private Group mBackground;
    private int mCurrent;
    private ListItem mCurrentItem;
    private boolean mWrapEnabled;
    private FollowAffector mSelectorFollow;
    private int mFirstFocusable;
    private boolean mFireIsDown;

}