001// Copyright 2004, 2005 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry.contrib.form; 016 017import org.apache.tapestry.IMarkupWriter; 018import org.apache.tapestry.IRequestCycle; 019import org.apache.tapestry.form.IPropertySelectionModel; 020 021/** 022 * Implementation of {@link IMultiplePropertySelectionRenderer} that 023 * produces a table of checkbox (<input type=checkbox>) elements. 024 * 025 * @author Sanjay Munjal 026 * 027 */ 028 029public class CheckBoxMultiplePropertySelectionRenderer 030 implements IMultiplePropertySelectionRenderer 031{ 032 033 /** 034 * Writes the <table> element. 035 * 036 **/ 037 038 public void beginRender( 039 MultiplePropertySelection component, 040 IMarkupWriter writer, 041 IRequestCycle cycle) 042 { 043 writer.begin("table"); 044 writer.attribute("border", 0); 045 writer.attribute("cellpadding", 0); 046 writer.attribute("cellspacing", 2); 047 } 048 049 /** 050 * Closes the <table> element. 051 * 052 **/ 053 054 public void endRender( 055 MultiplePropertySelection component, 056 IMarkupWriter writer, 057 IRequestCycle cycle) 058 { 059 writer.end(); // <table> 060 } 061 062 /** 063 * Writes a row of the table. The table contains two cells; the first is the checkbox, 064 * the second is the label for the checkbox. 065 * 066 **/ 067 068 public void renderOption( 069 MultiplePropertySelection component, 070 IMarkupWriter writer, 071 IRequestCycle cycle, 072 IPropertySelectionModel model, 073 Object option, 074 int index, 075 boolean selected) 076 { 077 writer.begin("tr"); 078 writer.begin("td"); 079 080 writer.beginEmpty("input"); 081 writer.attribute("type", "checkbox"); 082 writer.attribute("name", component.getName()); 083 writer.attribute("value", model.getValue(index)); 084 085 if (component.isDisabled()) 086 writer.attribute("disabled", "disabled"); 087 088 if (selected) 089 writer.attribute("checked", "checked"); 090 091 writer.end(); // <td> 092 093 writer.println(); 094 095 writer.begin("td"); 096 writer.print(model.getLabel(index)); 097 writer.end(); // <td> 098 writer.end(); // <tr> 099 100 writer.println(); 101 } 102}