| // Copyright 2004 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.tapestry.wml; |
| |
| import org.apache.tapestry.AbstractComponent; |
| import org.apache.tapestry.IMarkupWriter; |
| import org.apache.tapestry.IRequestCycle; |
| import org.apache.tapestry.Tapestry; |
| |
| /** |
| * The do element provides a general mechanism for the user to act upon the current card, |
| * in other words a card-level user interface element. |
| * The representation of the do element is user agent dependent and the author must only assume |
| * that the element is mapped to a unique user interface widget that the user can activate. |
| * For example, the widget mapping may be to a graphically rendered button, a soft or function key, a voice-activated command sequence, or any other interface that has a simple "activate" operation with no inter-operation persistent state. |
| * The do element may appear at both the card and deck-level. |
| * |
| * @version $Id$ |
| * @author David Solis |
| * @since 3.0 |
| * |
| **/ |
| |
| public abstract class Do extends AbstractComponent |
| { |
| /** |
| * @see AbstractComponent#renderComponent(IMarkupWriter, IRequestCycle) |
| **/ |
| |
| protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) |
| { |
| boolean render = !cycle.isRewinding(); |
| |
| if (render) |
| { |
| writer.begin("do"); |
| |
| writer.attribute("type", getType()); |
| |
| String label = getLabel(); |
| if (Tapestry.isNonBlank(label)) |
| writer.attribute("label", label); |
| |
| renderInformalParameters(writer, cycle); |
| } |
| |
| renderBody(writer, cycle); |
| |
| if (render) |
| writer.end(); |
| } |
| |
| public abstract String getType(); |
| |
| public abstract String getLabel(); |
| } |