sliderinput.java

来自「tbuy1.1.5是在netbeans环境下用JSF技术编写的一个论坛tbuy1」· Java 代码 · 共 79 行

/*
 * SliderInput.java
 * 
 * Created on 2007-9-25, 7:12:56
 * 
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package biz.tbuy.common.components.test;

import java.io.IOException;
import javax.faces.component.UIComponentBase;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;

/**
 *
 * @author Administrator
 */
public class SliderInput extends UIComponentBase{

    public SliderInput() {
        setRendererType(null);
    }

    public String getFamily() {
        return null;
    }

    String maxval = "100";
    String forid = null;
    String horizontal = "true";
    String length = "300";
    
    @Override
    public void encodeBegin(FacesContext fc) throws IOException {
        if (getAttributes().get("maxval") != null) {
            maxval = (String)getAttributes().get("maxval");
        }
        if (getAttributes().get("for") != null) {
            forid = (String)getAttributes().get("for");
        }
        if (getAttributes().get("horizontal") != null) {
            horizontal = (String)getAttributes().get("horizontal");
        }
        if (getAttributes().get("length") != null) {
            length = (String)getAttributes().get("length");
        }
        String comp_id = this.getId();
        String valchangehandler = "valchangehandler" + comp_id;
        String destinationDiv = "dest" + comp_id;
        
        forid = getBaseClientId(fc) + forid;
        
        ResponseWriter rw = fc.getResponseWriter();
        
        rw.write("<div id=\"" + destinationDiv + "\">" + 
                "<!-- slider goes here --></div>" + 
                "<script>var " + destinationDiv + " = document.getElementById(\"" + 
                destinationDiv + "\");" +
                destinationDiv + ".appendChild(JSSlider.getInstance(\"" + 
                comp_id + "\", " + horizontal + ", " + 
                "10, " + length + ", 0, undefined, undefined, \"" + valchangehandler + 
                "\", false).render());" + 
                " function " + valchangehandler +
                "(newStartPercent0To100, newEndPercent0To100) " + 
                "{ var slideval = Math.round(" + 
                maxval + "*newStartPercent0To100/100); document.getElementById(\"" + 
                forid + "\").value = slideval; "  + "}</script>");
    }
    
    private String getBaseClientId(FacesContext fc) {
        String clientId = getClientId(fc);
        return clientId.substring(0, clientId.indexOf(":") + 1);
    }

}