| // Copyright 2006, 2007 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry5.integration.app1.components; |
| |
| import org.apache.tapestry5.annotations.AfterRender; |
| import org.apache.tapestry5.annotations.Parameter; |
| import org.apache.tapestry5.annotations.SetupRender; |
| import org.apache.tapestry5.internal.util.IntegerRange; |
| |
| /** |
| * A component that can count up or count down. |
| * <p/> |
| * This is useful as a demonstration; now that the prop binding supports {@link IntegerRange integer ranges}, it's much |
| * less necessary. |
| */ |
| public class Count |
| { |
| @Parameter |
| private int start = 1; |
| |
| @Parameter(required = true) |
| private int end; |
| |
| @Parameter |
| private int value; |
| |
| private boolean increment; |
| |
| @SetupRender |
| void initializeValue() |
| { |
| value = start; |
| |
| increment = start < end; |
| } |
| |
| @AfterRender |
| boolean next() |
| { |
| if (increment) |
| { |
| int newValue = value + 1; |
| |
| if (newValue <= end) |
| { |
| value = newValue; |
| return false; // re-render body |
| } |
| } |
| else |
| { |
| int newValue = value - 1; |
| |
| if (newValue >= end) |
| { |
| value = newValue; |
| return false; // re-render body |
| } |
| } |
| |
| return true; |
| } |
| } |