/* * Modulname: RendererYesNo * Autor: Eyer Leander * Datum: 08.05.2006 * * (c) Copyright 2005 */ package survey.gui; import survey.Survey; import survey.model.Question; import survey.model.TypeYesNo; import javax.swing.*; import java.awt.*; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.util.Iterator; import java.util.Vector; /** * A renderer for multiple choice questions */ public class RendererYesNo extends Renderer implements ItemListener { // connection to the model private TypeYesNo type; private JLabel questionLabel; private JPanel answerPane; // radio buttons private Vector radioButtons = new Vector(); /** Constructor */ public RendererYesNo(Question element, TypeYesNo type) { super(element); this.type = type; createUI(); setEditable(getQuestion().isEditable()); } /** Config the user interface */ private void createUI() { String mandatoryFlag = getQuestion().isMandatory()? "* ":""; questionLabel = new JLabel("" + mandatoryFlag + getQuestion().getLabel() + ""); questionLabel.setFont(Survey.FONT_QUESTION_TEXT); ButtonGroup group = new ButtonGroup(); answerPane = new JPanel(new GridLayout(1, 0, 6, 6)); Vector labels = new Vector(); labels.add("Yes"); labels.add("No"); Iterator it = labels.iterator(); while (it.hasNext()) { JRadioButton button = new JRadioButton(it.next()); button.setFont(Survey.FONT_QUESTION_ANSWER); button.addItemListener(this); group.add(button); answerPane.add(button); radioButtons.add(button); } setLayout(new BorderLayout(24, 24)); add(questionLabel, BorderLayout.CENTER); add(answerPane, BorderLayout.EAST); } /** * Invoked when an item has been selected or deselected by the user. * The code written for this method performs the operations * that need to occur when an item is selected (or deselected). */ public void itemStateChanged(ItemEvent e) { // we only look at selec events if (e.getStateChange() == ItemEvent.DESELECTED) { return; } if (radioButtons.get(0).isSelected()) type.setAnswer("yes"); else type.setAnswer("no"); } /** * Update the question state (i.e. after a model element has been set programatically) */ public void updateRenderer() { String answer = (String) type.getAnswer(); if ((answer != null) && (answer.equalsIgnoreCase("yes"))) { radioButtons.get(0).setSelected(true); } else { radioButtons.get(1).setSelected(true); } } /** * Change the Editable property */ public void setEditable(boolean editable) { for (JRadioButton btn:radioButtons) { btn.setEnabled(editable); } } /** * Get the preferred width of the question label */ public double getLabelWidth() { return questionLabel.getPreferredSize().width; } /** * Set the width of the question label */ public void setLabelWidth(double width) { Dimension d = new Dimension((int) width, questionLabel.getPreferredSize().height); questionLabel.setMinimumSize(d); questionLabel.setPreferredSize(d); questionLabel.setMaximumSize(d); } /** * Get the size of the answer space */ public double getAnswerSpaceWidth() { return answerPane.getPreferredSize().width; } /** * Set the answer space width */ public void setAnswerSpaceWdith(double width) { Dimension d = new Dimension((int) width, answerPane.getPreferredSize().height); answerPane.setMinimumSize(d); answerPane.setPreferredSize(d); answerPane.setMaximumSize(d); } }