package co.zuren.rent.view.customview;/* * HorizontalListView.java v1.5 * * * The MIT License * Copyright (c) 2011 Paul Soucy (paul@dev-smart.com) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * */import java.util.LinkedList;import java.util.Queue;import android.content.Context;import android.database.DataSetObserver;import android.graphics.Rect;import android.util.AttributeSet;import android.view.GestureDetector;import android.view.GestureDetector.OnGestureListener;import android.view.MotionEvent;import android.view.View;import android.widget.AdapterView;import android.widget.ListAdapter;import android.widget.Scroller;public class HorizontalListView extends AdapterView
    
      {    public boolean mAlwaysOverrideTouch = true;    protected ListAdapter mAdapter;    private int mLeftViewIndex = -1;    private int mRightViewIndex = 0;    protected int mCurrentX;    protected int mNextX;    private int mMaxX = Integer.MAX_VALUE;    private int mDisplayOffset = 0;    protected Scroller mScroller;    private GestureDetector mGesture;    private Queue
     
       mRemovedViewQueue = new LinkedList
      
       ();    private OnItemSelectedListener mOnItemSelected;    private OnItemClickListener mOnItemClicked;    private OnItemLongClickListener mOnItemLongClicked;    private boolean mDataChanged = false;    public HorizontalListView(Context context, AttributeSet attrs) {        super(context, attrs);        initView();    }    private synchronized void initView() {        mLeftViewIndex = -1;        mRightViewIndex = 0;        mDisplayOffset = 0;        mCurrentX = 0;        mNextX = 0;        mMaxX = Integer.MAX_VALUE;        mScroller = new Scroller(getContext());        mGesture = new GestureDetector(getContext(), mOnGesture);    }    @Override    public void setOnItemSelectedListener(AdapterView.OnItemSelectedListener listener) {        mOnItemSelected = listener;    }    @Override    public void setOnItemClickListener(AdapterView.OnItemClickListener listener){        mOnItemClicked = listener;    }    @Override    public void setOnItemLongClickListener(AdapterView.OnItemLongClickListener listener) {        mOnItemLongClicked = listener;    }    private DataSetObserver mDataObserver = new DataSetObserver() {        @Override        public void onChanged() {            synchronized(HorizontalListView.this){                mDataChanged = true;            }            invalidate();            requestLayout();        }        @Override        public void onInvalidated() {            reset();            invalidate();            requestLayout();        }    };    @Override    public ListAdapter getAdapter() {        return mAdapter;    }    @Override    public View getSelectedView() {        //TODO: implement        return null;    }    @Override    public void setAdapter(ListAdapter adapter) {        if(mAdapter != null) {            mAdapter.unregisterDataSetObserver(mDataObserver);        }        mAdapter = adapter;        mAdapter.registerDataSetObserver(mDataObserver);        reset();    }    private synchronized void reset(){        initView();        removeAllViewsInLayout();        requestLayout();    }    @Override    public void setSelection(int position) {        //TODO: implement    }    private void addAndMeasureChild(final View child, int viewPos) {        LayoutParams params = child.getLayoutParams();        if(params == null) {            params = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);        }        addViewInLayout(child, viewPos, params, true);        child.measure(MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST),                MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.AT_MOST));    }    @Override    protected synchronized void onLayout(boolean changed, int left, int top, int right, int bottom) {        super.onLayout(changed, left, top, right, bottom);        if(mAdapter == null){            return;        }        if(mDataChanged){            int oldCurrentX = mCurrentX;            initView();            removeAllViewsInLayout();            mNextX = oldCurrentX;            mDataChanged = false;        }        if(mScroller.computeScrollOffset()){            int scrollx = mScroller.getCurrX();            mNextX = scrollx;        }        if(mNextX <= 0){            mNextX = 0;            mScroller.forceFinished(true);        }        if(mNextX >= mMaxX) {            mNextX = mMaxX;            mScroller.forceFinished(true);        }        int dx = mCurrentX - mNextX;        removeNonVisibleItems(dx);        fillList(dx);        positionItems(dx);        mCurrentX = mNextX;        if(!mScroller.isFinished()){            post(new Runnable(){                @Override                public void run() {                    requestLayout();                }            });        }    }    private void fillList(final int dx) {        int edge = 0;        View child = getChildAt(getChildCount()-1);        if(child != null) {            edge = child.getRight();        }        fillListRight(edge, dx);        edge = 0;        child = getChildAt(0);        if(child != null) {            edge = child.getLeft();        }        fillListLeft(edge, dx);    }    private void fillListRight(int rightEdge, final int dx) {        while(rightEdge + dx < getWidth() && mRightViewIndex < mAdapter.getCount()) {            View child = mAdapter.getView(mRightViewIndex, mRemovedViewQueue.poll(), this);            addAndMeasureChild(child, -1);            rightEdge += child.getMeasuredWidth();            if(mRightViewIndex == mAdapter.getCount()-1) {                mMaxX = mCurrentX + rightEdge - getWidth();            }            if (mMaxX < 0) {                mMaxX = 0;            }            mRightViewIndex++;        }    }    private void fillListLeft(int leftEdge, final int dx) {        while(leftEdge + dx > 0 && mLeftViewIndex >= 0) {            View child = mAdapter.getView(mLeftViewIndex, mRemovedViewQueue.poll(), this);            addAndMeasureChild(child, 0);            leftEdge -= child.getMeasuredWidth();            mLeftViewIndex--;            mDisplayOffset -= child.getMeasuredWidth();        }    }    private void removeNonVisibleItems(final int dx) {        View child = getChildAt(0);        while(child != null && child.getRight() + dx <= 0) {            mDisplayOffset += child.getMeasuredWidth();            mRemovedViewQueue.offer(child);            removeViewInLayout(child);            mLeftViewIndex++;            child = getChildAt(0);        }        child = getChildAt(getChildCount()-1);        while(child != null && child.getLeft() + dx >= getWidth()) {            mRemovedViewQueue.offer(child);            removeViewInLayout(child);            mRightViewIndex--;            child = getChildAt(getChildCount()-1);        }    }    private void positionItems(final int dx) {        if(getChildCount() > 0){            mDisplayOffset += dx;            int left = mDisplayOffset;            for(int i=0;i
       
        
         < childCount; i++) {                View child = getChildAt(i);                if (isEventWithinView(e, child)) {                    if (mOnItemLongClicked != null) {                        mOnItemLongClicked.onItemLongClick(HorizontalListView.this, child, mLeftViewIndex + 1 + i, mAdapter.getItemId(mLeftViewIndex + 1 + i));                    }                    break;                }            }        }        private boolean isEventWithinView(MotionEvent e, View child) {            Rect viewRect = new Rect();            int[] childPosition = new int[2];            child.getLocationOnScreen(childPosition);            int left = childPosition[0];            int right = left + child.getWidth();            int top = childPosition[1];            int bottom = top + child.getHeight();            viewRect.set(left, top, right, bottom);            return viewRect.contains((int) e.getRawX(), (int) e.getRawY());        }    };}