mypaging.java

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package mycomp.paging;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.zkoss.zk.ui.HtmlMacroComponent;
import org.zkoss.zk.ui.WrongValueException;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.EventListener;
import org.zkoss.zk.ui.event.Events;
import org.zkoss.zul.Intbox;
import org.zkoss.zul.Label;
import org.zkoss.zul.Toolbarbutton;
import org.zkoss.zul.event.PagingEvent;
import org.zkoss.zul.event.ZulEvents;
import org.zkoss.zul.ext.Paginal;

/**
 * @author Dennis.Chen
 *
 */
public class MyPaging extends HtmlMacroComponent implements Paginal {
	private static final long serialVersionUID = 1L;
	private int _pageIncrement;
	private int _totalSize;
	private boolean _detailed;
	private int _activePage;
	private int _pageCount;
	private int _pageSize = 10;
	
	
	private Toolbarbutton _firstBtn;
	private Toolbarbutton _prevBtn;
	private Toolbarbutton _nextBtn;
	private Toolbarbutton _lastBtn;
	private Intbox _intBox;
	private Label _totalPageLab;
	private Label _totalSizeLab;
	
	private String _fisrtImageSrc = "~./mycomp/images/pagination_first.png";
	private String _prevImageSrc = "~./mycomp/images/pagination_prev.png";
	private String _nextImageSrc = "~./mycomp/images/pagination_next.png";
	private String _lastImageSrc = "~./mycomp/images/pagination_last.png";
	private String _fisrtImageDisSrc = "~./mycomp/images/pagination_first_dis.png";
	private String _prevImageDisSrc = "~./mycomp/images/pagination_prev_dis.png";
	private String _nextImageDisSrc = "~./mycomp/images/pagination_next_dis.png";
	private String _lastImageDisSrc = "~./mycomp/images/pagination_last_dis.png";
	
	List _interactor = new ArrayList();
	
	boolean _init = false;
	
	public void onCreate(){
		//defer initial.
		this.addEventListener("onCreateLater",new EventListener(){
			public void onEvent(Event arg0) throws Exception {
				doCreateLater();
			}}
		);
		Events.postEvent("onCreateLater",this,null);
		
		this.addEventListener(ZulEvents.ON_PAGING,new EventListener(){
			public void onEvent(Event evt) throws Exception {
				Iterator iter = _interactor.iterator();
				while(iter.hasNext()){
					MyPaging cmp = (MyPaging)iter.next();
					if(cmp==MyPaging.this) continue;
					cmp.onGogo(((PagingEvent)evt).getActivePage());
				}
			}}
		);
	}
	
	public void addInteractor(MyPaging paging){
		_interactor.add(paging);
	}
	
	public void removeInteractor(MyPaging paging){
		_interactor.remove(paging);
	}
	
	private void doCreateLater(){
		_firstBtn = (Toolbarbutton)getFellow("firstBtn");
		_prevBtn = (Toolbarbutton)getFellow("prevBtn");
		_nextBtn = (Toolbarbutton)getFellow("nextBtn");
		_lastBtn = (Toolbarbutton)getFellow("lastBtn");
		_intBox = (Intbox)getFellow("intBox");
		_totalPageLab = (Label)getFellow("totalPageLab");
		_totalSizeLab = (Label)getFellow("totalSizeLab");
		
		_firstBtn.addEventListener("onClick",new EventListener(){
			public void onEvent(Event arg0) throws Exception {
				onFirstBtnClick();
			}});
		
		_prevBtn.addEventListener("onClick",new EventListener(){
			public void onEvent(Event arg0) throws Exception {
				onPreviousBtnClick();
			}});
		_nextBtn.addEventListener("onClick",new EventListener(){
			public void onEvent(Event arg0) throws Exception {
				onNextBtnClick();
			}});
		_lastBtn.addEventListener("onClick",new EventListener(){
			public void onEvent(Event arg0) throws Exception {
				onLastBtnClick();
			}});
		
		_intBox.addEventListener("onOK",new EventListener(){
			public void onEvent(Event arg0) throws Exception {
				if(_intBox.getValue()==null){
					updateUI();
				}else{
					onGogo(_intBox.getValue().intValue()-1);
				}
			}});
		_intBox.addEventListener("onChange",new EventListener(){
			public void onEvent(Event arg0) throws Exception {
				if(_intBox.getValue()==null){
					updateUI();
				}else{
					onGogo(_intBox.getValue().intValue()-1);
				}
			}});
		
		_init = true;
		
		this.setStyle("");//clear
		this.setSclass("");//clear
		updateUI();
	}

	protected void fireEvent(PagingEvent event){
		setActivePage(event.getActivePage());
		Events.postEvent(event);

	}
	
	private void onFirstBtnClick(){
		if(_activePage!=0){
			onGogo(0);
		}
	}
	
	private void onPreviousBtnClick(){
		if(_activePage>0){
			onGogo(_activePage-1);
		}
	}
	
	private void onNextBtnClick(){
		if(_activePage<_pageCount){
			onGogo(_activePage+1);
		}
	}
	
	private void onLastBtnClick(){
		if(_activePage!=_pageCount-1){
			onGogo(_pageCount-1);
		}
	}
	
	private void updateUI(){
		if(!_init) return;
		
		_totalPageLab.setValue(new Integer(_pageCount).toString());
		_totalSizeLab.setValue(new Integer(_totalSize).toString());
		_intBox.setValue(new Integer((_activePage+1)));
		
		if(_activePage<=0){
			_firstBtn.setSrc(_fisrtImageDisSrc);
			_prevBtn.setSrc(_prevImageDisSrc);
		}else{
			_firstBtn.setSrc(_fisrtImageSrc);
			_prevBtn.setSrc(_prevImageSrc);
		}
		
		if(_activePage>=_pageCount-1){
			_lastBtn.setSrc(_lastImageDisSrc);
			_nextBtn.setSrc(_nextImageDisSrc);
		}else{
			_lastBtn.setSrc(_lastImageSrc);
			_nextBtn.setSrc(_nextImageSrc);
		}
	}
	
	private void onGogo(int i){
		if(i<0){
			i = 0;
		}else if(i>=_pageCount){
			i = _pageCount -1;
		}
		if(_activePage!=i){
			_activePage = i;
			fireEvent(new PagingEvent(ZulEvents.ON_PAGING,this,_activePage));
		}
		updateUI();
	}
	
	/* (non-Javadoc)
	 * @see org.zkoss.zul.ext.Paginal#getPageIncrement()
	 */
	public int getPageIncrement() {
		return _pageIncrement;
	}

	/* (non-Javadoc)
	 * @see org.zkoss.zul.ext.Paginal#getTotalSize()
	 */
	public int getTotalSize() {
		return _totalSize;
	}

	/* (non-Javadoc)
	 * @see org.zkoss.zul.ext.Paginal#isDetailed()
	 */
	public boolean isDetailed() {
		// TODO Auto-generated method stub
		return _detailed;
	}

	/* (non-Javadoc)
	 * @see org.zkoss.zul.ext.Paginal#setDetailed(boolean)
	 */
	public void setDetailed(boolean detailed) {
		_detailed = detailed;
	}

	/* (non-Javadoc)
	 * @see org.zkoss.zul.ext.Paginal#setPageIncrement(int)
	 */
	public void setPageIncrement(int pginc) throws WrongValueException {
		_pageIncrement = pginc;
	}

	/* (non-Javadoc)
	 * @see org.zkoss.zul.ext.Paginal#setTotalSize(int)
	 */
	public void setTotalSize(int size) throws WrongValueException {
		this.setTotalSize0(size);
		Iterator iter = _interactor.iterator();
		while(iter.hasNext()){
			MyPaging cmp = (MyPaging)iter.next();
			if(cmp==MyPaging.this) continue;
			cmp.setTotalSize0(size);
		}
		
	}
	
	private void setTotalSize0(int size) throws WrongValueException {
		_totalSize = size;
		_pageCount = (int)(_totalSize/_pageSize) + ((_totalSize%_pageSize==0)?0:1);
		if(_activePage > (_pageCount-1)){
			onGogo(_pageCount-1);
		}
		updateUI();
	}

	/* (non-Javadoc)
	 * @see org.zkoss.zul.ext.Pageable#getActivePage()
	 */
	public int getActivePage() {
		return _activePage;
	}

	/* (non-Javadoc)
	 * @see org.zkoss.zul.ext.Pageable#getPageCount()
	 */
	public int getPageCount() {
		return _pageCount;
	}

	/* (non-Javadoc)
	 * @see org.zkoss.zul.ext.Pageable#getPageSize()
	 */
	public int getPageSize() {
		return _pageSize;
	}

	/* (non-Javadoc)
	 * @see org.zkoss.zul.ext.Pageable#setActivePage(int)
	 */
	public void setActivePage(int pg) throws WrongValueException {
		_activePage = pg;
		
		Events.postEvent(new PagingEvent("onPagingImpl", this, _activePage));
	}

	
	public void setPageSize(int size) throws WrongValueException {
		this.setPageSize0(size);
		
		Iterator iter = _interactor.iterator();
		while(iter.hasNext()){
			MyPaging cmp = (MyPaging)iter.next();
			if(cmp==MyPaging.this) continue;
			cmp.setPageSize0(size);
		}
		
		
		
	}
	
	public void setPageSize0(int size) throws WrongValueException {
		_pageSize = size;
		_pageCount = (int)(_totalSize/_pageSize) + ((_totalSize%_pageSize==0)?0:1);
		updateUI();
		Events.postEvent(new PagingEvent("onPagingImpl", this, _activePage));
	}

	public String getFisrtImageSrc() {
		return _fisrtImageSrc;
	}

	public void setFisrtImageSrc(String fisrtImageSrc) {
		this._fisrtImageSrc = fisrtImageSrc;
	}

	public String getPrevImageSrc() {
		return _prevImageSrc;
	}

	public void setPrevImageSrc(String prevImageSrc) {
		this._prevImageSrc = prevImageSrc;
	}

	public String getNextImageSrc() {
		return _nextImageSrc;
	}

	public void setNextImageSrc(String nextImageSrc) {
		this._nextImageSrc = nextImageSrc;
	}

	public String getLastImageSrc() {
		return _lastImageSrc;
	}

	public void setLastImageSrc(String lastImageSrc) {
		this._lastImageSrc = lastImageSrc;
	}

	public String getFisrtImageDisSrc() {
		return _fisrtImageDisSrc;
	}

	public void setFisrtImageDisSrc(String fisrtImageDisSrc) {
		this._fisrtImageDisSrc = fisrtImageDisSrc;
	}

	public String getPrevImageDisSrc() {
		return _prevImageDisSrc;
	}

	public void setPrevImageDisSrc(String prevImageDisSrc) {
		this._prevImageDisSrc = prevImageDisSrc;
	}

	public String getNextImageDisSrc() {
		return _nextImageDisSrc;
	}

	public void setNextImageDisSrc(String nextImageDisSrc) {
		this._nextImageDisSrc = nextImageDisSrc;
	}

	public String getLastImageDisSrc() {
		return _lastImageDisSrc;
	}

	public void setLastImageDisSrc(String lastImageDisSrc) {
		this._lastImageDisSrc = lastImageDisSrc;
	}
	
	
	

}