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/*
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* Angkor Web Framework
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*
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* Distributable under LGPL license.
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* See terms of license at gnu.org.
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*/
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package com.tirsen.angkor.widget;
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import com.tirsen.angkor.RenderContext;
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import com.tirsen.angkor.Component;
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import com.tirsen.angkor.event.ChangeListener;
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import com.tirsen.angkor.event.ChangeSource;
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import com.tirsen.angkor.event.ChangeSourceHelper;
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import java.beans.PropertyEditor;
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import java.io.IOException;
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/**
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* Takes input from user as text.
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*
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* <p>
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*
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* Has the following functionality:
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* <li> fetches its value from a {@link ValueModel}.
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* <li> updates its value to the {@link ValueModel}.
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* <li> has a prompt as a {@link TextLabel}.
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* <li> has a configurable size.
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*
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*
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* <!-- $Id: TextInput.java,v 1.5 2002/10/13 19:59:23 tirsen Exp $ -->
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*
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* @author $Author: tirsen $
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* @version $Revision: 1.5 $
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* @see ValueModel
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* @see TextLabel
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*/
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public class TextInput extends Component implements ChangeSource
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{
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private ValueModel model;
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private TextLabel prompt;
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private int size = -1;
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private ChangeSourceHelper changeSourceHelper = new ChangeSourceHelper(this);
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private String text = null;
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private boolean password = false;
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public TextInput(String id)
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{
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super(id);
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}
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public TextInput()
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{
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}
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public TextInput(String prompt, ValueModel model)
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{
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setPrompt(prompt);
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this.model = model;
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}
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public TextInput(ValueModel model)
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{
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this.model = model;
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}
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public void addChangeListener(ChangeListener listener)
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{
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changeSourceHelper.addChangeListener(listener);
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}
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public void removeChangeListener(ChangeListener listener)
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{
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changeSourceHelper.removeChangeListener(listener);
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}
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public void setSize(int size)
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{
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this.size = size;
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}
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/**
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* Set the prompt as a @{link TextLabel} widget. This enables more sofisticated display
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* of a prompt than by using only a <code>String</code>.
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* The prompt is displayed above the input-box.
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*/
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public void setPrompt(TextLabel prompt)
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{
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this.prompt = prompt;
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}
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/**
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* Sets the text of the prompt. The prompt is displayed above the input-box.
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*/
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public void setPrompt(String promptText)
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{
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prompt = new TextLabel();
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prompt.setLabel(promptText);
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}
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public void setVisible(boolean visible)
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{
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super.setVisible(visible);
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prompt.setVisible(visible);
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}
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public void setModel(ValueModel model)
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{
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this.model = model;
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}
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/**
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* This widget is interested in parsing events.
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* @return <code>true</code>
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*/
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public boolean isParsing()
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{
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return true;
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}
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/**
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* Retrieves the value in the parameter named by {@link #getId()} and updates
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* the model with this value. The PropertyEditor specified by the model is used to
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* parse the <code>String</code> into an <code>Object</code>.
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*/
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public void parse(RenderContext context)
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{
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super.parse(context);
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if (isVisible())
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{
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text = context.getRequestParameter(getId());
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if (text != null)
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{
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PropertyEditor editor = getModel().getPropertyEditor();
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editor.setAsText(text);
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Object newValue = editor.getValue();
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getModel().setValue(newValue);
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text = null;
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changeSourceHelper.signalChangeEvent(context);
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}
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}
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}
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public void render(RenderContext context) throws IOException
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{
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if (isVisible())
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{
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if (prompt != null) prompt.render(context);
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context.emptyTag("BR");
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if (text == null)
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{
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Object value = getModel().getValue();
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PropertyEditor editor = getModel().getPropertyEditor();
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if (editor != null)
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{
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if (value != null)
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{
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editor.setValue(value);
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text = editor.getAsText();
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}
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else
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{
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text = "";
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}
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}
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else
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text = "<error, no editor>";
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if (text == null) text = "";
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}
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// TODO: recalculate width for different browsers here...
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String type = password ? " type=\"password\"" : " type=\"text\"";
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String sizeAttr = "";
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if (size != -1) sizeAttr = " size=\"" + size + "\"";
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String name = " name=\"" + uniqueId(context) + "\"";
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String value = " value=\"" + text + "\"";
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String id = " id=\"" + uniqueId(context) + "\"";
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context.emptyTag("INPUT" + type + id + sizeAttr + name + value);
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if (getModel() == null || !getModel().isReadOnly()) context.registerParsingComponent(this);
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}
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}
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public void setPassword(boolean password)
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{
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this.password = password;
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}
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public ValueModel getModel()
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{
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if (model == null) model = createDefaultModel();
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return model;
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}
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private BasicValueModel createDefaultModel()
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{
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return new BasicValueModel();
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}
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}
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