svn-gvsig-desktop / trunk / libraries / libIverUtiles / src / com / iver / utiles / swing / wizard / Wizard.java @ 4033
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package com.iver.utiles.swing.wizard; |
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import java.awt.BorderLayout; |
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import java.awt.CardLayout; |
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import java.awt.Graphics; |
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import java.awt.Graphics2D; |
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import java.awt.font.FontRenderContext; |
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import java.awt.font.TextLayout; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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import javax.swing.JButton; |
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import javax.swing.JComponent; |
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import javax.swing.JPanel; |
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/**
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* Clase wizard con la gesti?n de los botones y los paneles a?adidos al mismo.
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* Al avanzar o retrasar un paso el asistente se desactivan todos los botones
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* menos el de cancelar, que est? activo siempre por defecto
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*
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* @author Fernando Gonz?lez Cort?s
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*/
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public class Wizard extends JPanel implements WizardControl { |
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private JPanel jPanel = null; |
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private JButton btnBack = null; |
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private JButton btnNext = null; |
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private JButton btnFinish = null; |
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private JButton btnCancel = null; |
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private ArrayList steps = new ArrayList(); |
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private int currentStep = 0; |
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private JPanel pnlSteps = null; |
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private ArrayList listeners = new ArrayList(); |
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/**
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* This is the default constructor
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*/
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public Wizard(String backText, String nextText, String finishText, String cancelText) { |
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super();
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initialize(backText, nextText, finishText, cancelText); |
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} |
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/**
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* A?ade un l?stener de eventos del wizard
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*
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* @param listener
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*/
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public void addWizardListener(WizardListener listener) { |
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listeners.add(listener); |
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} |
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/**
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* Elimina un listener de eventos del wizard
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*
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* @param listener
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*/
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public void removeWizardListener(WizardListener listener) { |
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listeners.remove(listener); |
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} |
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/**
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* Invoca en los listeners el evento cancel
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*/
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private void callCancelListener() { |
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for (Iterator iter = listeners.iterator(); iter.hasNext();) { |
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WizardListener element = (WizardListener) iter.next(); |
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element.cancel(new WizardEvent(this, currentStep)); |
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} |
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} |
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/**
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* Invoca en los listeners el evento finish
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*/
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private void callFinishListener() { |
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for (Iterator iter = listeners.iterator(); iter.hasNext();) { |
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WizardListener element = (WizardListener) iter.next(); |
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element.finished(new WizardEvent(this, currentStep)); |
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} |
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} |
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/**
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* Invoca en los listeners el evento next
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*/
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private void callNextListener() { |
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for (Iterator iter = listeners.iterator(); iter.hasNext();) { |
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WizardListener element = (WizardListener) iter.next(); |
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element.next(new WizardEvent(this, currentStep)); |
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} |
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} |
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/**
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* Invoca en los listeners el evento back
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*/
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private void callBackListener() { |
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for (Iterator iter = listeners.iterator(); iter.hasNext();) { |
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WizardListener element = (WizardListener) iter.next(); |
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element.back(new WizardEvent(this, currentStep)); |
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} |
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} |
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/**
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* This method initializes this
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*/
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private void initialize(String backText, String nextText, String finishText, String cancelText) { |
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this.setLayout(new BorderLayout()); |
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this.setSize(300, 200); |
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this.add(getJPanel(backText, nextText, finishText, cancelText), java.awt.BorderLayout.SOUTH);
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this.add(getPnlSteps(), java.awt.BorderLayout.CENTER);
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} |
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/**
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* A?ade un paso al asistente. Inicializa el paso
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*
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* @param s Paso a a?adir
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*
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* @throws RuntimeException DOCUMENT ME!
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*/
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public void addStep(Step s) { |
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if (!(s instanceof JComponent)) { |
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throw new RuntimeException( |
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"Step must be a visual component (descend from JComponent)");
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} |
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getPnlSteps().add((JComponent) s, BorderLayout.CENTER); |
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steps.add(s); |
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disableButtons(); |
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s.init(this);
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} |
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/**
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* Habilita o deshabilita los botones en funci?n del paso en el que se
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* encuentre el asistente
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*/
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private void disableButtons() { |
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btnNext.setEnabled(false);
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btnBack.setEnabled(false);
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btnFinish.setEnabled(false);
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} |
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/**
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* Activa el paso al siguiente paso del asistente
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*/
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public void enableNext(boolean enabled) { |
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if (currentStep == (steps.size() - 1)) { |
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btnFinish.setEnabled(enabled); |
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} else {
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btnNext.setEnabled(enabled); |
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} |
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} |
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/**
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* Activa el paso al paso anterior del asistente
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*/
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public void enableBack(boolean enabled) { |
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if (currentStep != 0) { |
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btnBack.setEnabled(enabled); |
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} |
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} |
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/**
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* This method initializes jPanel
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*
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* @return javax.swing.JPanel
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*/
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private JPanel getJPanel(String backText, String nextText, String finishText, String cancelText) { |
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if (jPanel == null) { |
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jPanel = new JPanel(); |
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jPanel.add(getBtnBack(backText), null);
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jPanel.add(getBtnNext(nextText), null);
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jPanel.add(getBtnFinish(finishText), null);
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jPanel.add(getBtnCancel(cancelText), null);
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} |
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return jPanel;
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} |
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private JButton newJButton(String text){ |
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return new JButton() { |
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protected void paintComponent(Graphics g) { |
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TextLayout tl = new TextLayout(getText(), getFont(), ((Graphics2D )getGraphics()).getFontRenderContext()); |
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setPreferredSize(new java.awt.Dimension((int) tl.getBounds().getWidth(), 18)); |
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super.paintComponent(g);
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} |
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}; |
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} |
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/**
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* Obtiene una referencia al bot?n de dar un paso atr?s
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* @param text
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*
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* @return javax.swing.JButton
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*/
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public JButton getBtnBack(String text) { |
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if (btnBack == null) { |
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btnBack = newJButton(text); |
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btnBack.setText(text); |
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btnBack.setMargin(new java.awt.Insets(2, 2, 2, 2)); |
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btnBack.setEnabled(false);
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btnBack.addActionListener(new java.awt.event.ActionListener() {
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public void actionPerformed(java.awt.event.ActionEvent e) { |
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backStep(); |
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} |
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}); |
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} |
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return btnBack;
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} |
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/**
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* Obtiene una referencia al bot?n de dar un paso adelante
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* @param text
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*
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* @return javax.swing.JButton
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*/
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public JButton getBtnNext(String text) { |
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if (btnNext == null) { |
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btnNext = newJButton(text); |
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btnNext.setText(text); |
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btnNext.setMargin(new java.awt.Insets(2, 2, 2, 2)); |
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btnNext.setEnabled(false);
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btnNext.addActionListener(new java.awt.event.ActionListener() {
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public void actionPerformed(java.awt.event.ActionEvent e) { |
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nextStep(); |
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} |
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}); |
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} |
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return btnNext;
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} |
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/**
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* Obtiene una referencia al bot?n de finalizar
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* @param finishText
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*
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* @return javax.swing.JButton
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*/
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public JButton getBtnFinish(String text) { |
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if (btnFinish == null) { |
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btnFinish = newJButton(text); |
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btnFinish.setMargin(new java.awt.Insets(2, 2, 2, 2)); |
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btnFinish.setText(text); |
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btnFinish.setEnabled(false);
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btnFinish.addActionListener(new java.awt.event.ActionListener() {
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public void actionPerformed(java.awt.event.ActionEvent e) { |
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callFinishListener(); |
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} |
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}); |
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} |
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return btnFinish;
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} |
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/**
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* Obtiene una referencia al bot?n de cancelar
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* @param cancelText
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*
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* @return javax.swing.JButton
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*/
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public JButton getBtnCancel(String text) { |
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if (btnCancel == null) { |
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btnCancel = newJButton(text); |
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btnCancel.setMargin(new java.awt.Insets(2, 2, 2, 2)); |
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btnCancel.setText(text); |
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btnCancel.addActionListener(new java.awt.event.ActionListener() {
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public void actionPerformed(java.awt.event.ActionEvent e) { |
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callCancelListener(); |
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} |
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}); |
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} |
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return btnCancel;
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} |
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/**
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* This method initializes pnlSteps
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*
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* @return javax.swing.JPanel
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*/
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private JPanel getPnlSteps() { |
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if (pnlSteps == null) { |
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pnlSteps = new JPanel(); |
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pnlSteps.setLayout(new CardLayout()); |
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} |
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return pnlSteps;
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} |
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/**
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* Muestra el panel del siguiente paso del asistente
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*/
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public void nextStep() { |
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currentStep++; |
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((CardLayout) getPnlSteps().getLayout()).next(getPnlSteps());
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disableButtons(); |
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callNextListener(); |
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} |
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/**
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* Muestra el panel del paso anterior del asistente
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*/
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public void backStep() { |
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currentStep--; |
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((CardLayout) getPnlSteps().getLayout()).previous(getPnlSteps());
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disableButtons(); |
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callBackListener(); |
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} |
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/**
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* Se cancela el asistente. Esta operaci?n no tiene ning?n efecto, salvo
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* que se disparar? el evento de cancelado. El resultado de esto depender?
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* de las implementaciones que haya escuchando el evento. Generalmente
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* deber? haber un objeto que al escuchar este evento cerrar? el
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* asistente.
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*/
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public void cancel() { |
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callCancelListener(); |
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} |
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/**
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* Se finaliza el asistente. Esta operaci?n no tiene ning?n efecto, salvo
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* que se disparar? el evento de finalizaci?n. El resultado de esto
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* depender? de las implementaciones que haya escuchando el evento.
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* Generalmente deber? haber un objeto que al escuchar este evento cerrar?
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* el asistente.
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*/
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public void finish() { |
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callFinishListener(); |
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} |
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/**
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* Obtiene un array con los pasos del asistente
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*
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* @return array de pasos
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*/
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public Step[] getSteps() { |
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return (Step[]) steps.toArray(new Step[0]); |
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} |
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/**
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* Obtiene el paso actual del asistente
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*
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* @return Paso actual del asistente
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*/
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public Step getCurrentStep() {
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return getSteps()[currentStep];
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} |
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} |