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.form; 016 017import org.apache.tapestry.IMarkupWriter; 018import org.apache.tapestry.IRequestCycle; 019 020/** 021 * Implementation of {@link IPropertySelectionRenderer} that 022 * produces a <select> element (containing <option> elements). 023 * 024 * @author Howard Lewis Ship 025 * 026 **/ 027 028public class SelectPropertySelectionRenderer 029 implements IPropertySelectionRenderer 030{ 031 /** 032 * Writes the <select> element. If the 033 * {@link PropertySelection} is {@link PropertySelection#isDisabled() disabled} 034 * then a <code>disabled</code> attribute is written into the tag 035 * (though Navigator 4 will ignore this). 036 * 037 **/ 038 039 public void beginRender( 040 PropertySelection component, 041 IMarkupWriter writer, 042 IRequestCycle cycle) 043 { 044 writer.begin("select"); 045 writer.attribute("name", component.getName()); 046 047 if (component.isDisabled()) 048 writer.attribute("disabled", "disabled"); 049 050 writer.println(); 051 } 052 053 /** 054 * Closes the <select> element. 055 * 056 **/ 057 058 public void endRender( 059 PropertySelection component, 060 IMarkupWriter writer, 061 IRequestCycle cycle) 062 { 063 writer.end(); // <select> 064 } 065 066 /** 067 * Writes an <option> element. 068 * 069 **/ 070 071 public void renderOption( 072 PropertySelection component, 073 IMarkupWriter writer, 074 IRequestCycle cycle, 075 IPropertySelectionModel model, 076 Object option, 077 int index, 078 boolean selected) 079 { 080 writer.beginEmpty("option"); 081 writer.attribute("value", model.getValue(index)); 082 083 if (selected) 084 writer.attribute("selected", "selected"); 085 086 writer.print(model.getLabel(index)); 087 088 writer.end(); 089 090 writer.println(); 091 } 092}