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/*
* Copyright (c) 2009 Albert Kurucz.
*
* This file, WizardDialog.java is part of JTStand.
*
* JTStand is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* JTStand is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with GTStand. If not, see
* When the user backs up by one or more steps, the dialog keeps the completed steps so that
* they can be reused if the user doesn't change anything - this handles the cases where the user
* backs up a few steps just to review what has been completed.
*
* But if the user changes some options in an earlier step, then the dialog may have to discard
* the later steps and have them repeated.
*
* THIS CLASS IS NOT WORKING CORRECTLY YET.
*
*
* @author David Gilbert
*/
public class WizardDialog extends JDialog implements ActionListener {
/** The end result of the wizard sequence. */
private Object result;
/** The current step in the wizard process (starting at step zero). */
private int step;
/** A reference to the current panel. */
private WizardPanel currentPanel;
/** A list of references to the panels the user has already seen - used for navigating through
the steps that have already been completed. */
private java.util.List panels;
/** A handy reference to the "previous" button. */
private JButton previousButton;
/** A handy reference to the "next" button. */
private JButton nextButton;
/** A handy reference to the "finish" button. */
private JButton finishButton;
/** A handy reference to the "help" button. */
private JButton helpButton;
/**
* Standard constructor - builds and returns a new WizardDialog.
*
* @param owner the owner.
* @param modal modal?
* @param title the title.
* @param firstPanel the first panel.
*/
public WizardDialog(final JDialog owner, final boolean modal,
final String title, final WizardPanel firstPanel) {
super(owner, title + " : step 1", modal);
this.result = null;
this.currentPanel = firstPanel;
this.step = 0;
this.panels = new ArrayList();
this.panels.add(firstPanel);
setContentPane(createContent());
}
/**
* Standard constructor - builds a new WizardDialog owned by the specified JFrame.
*
* @param owner the owner.
* @param modal modal?
* @param title the title.
* @param firstPanel the first panel.
*/
public WizardDialog(final JFrame owner, final boolean modal,
final String title, final WizardPanel firstPanel) {
super(owner, title + " : step 1", modal);
this.result = null;
this.currentPanel = firstPanel;
this.step = 0;
this.panels = new ArrayList();
this.panels.add(firstPanel);
setContentPane(createContent());
}
/**
* Returns the result of the wizard sequence.
*
* @return the result.
*/
public Object getResult() {
return this.result;
}
/**
* Returns the total number of steps in the wizard sequence, if this number is known. Otherwise
* this method returns zero. Subclasses should override this method unless the number of steps
* is not known.
*
* @return the number of steps.
*/
public int getStepCount() {
return 0;
}
/**
* Returns true if it is possible to back up to the previous panel, and false otherwise.
*
* @return boolean.
*/
public boolean canDoPreviousPanel() {
return (this.step > 0);
}
/**
* Returns true if there is a 'next' panel, and false otherwise.
*
* @return boolean.
*/
public boolean canDoNextPanel() {
return this.currentPanel.hasNextPanel();
}
/**
* Returns true if it is possible to finish the sequence at this point (possibly with defaults
* for the remaining entries).
*
* @return boolean.
*/
public boolean canFinish() {
return this.currentPanel.canFinish();
}
/**
* Returns the panel for the specified step (steps are numbered from zero).
*
* @param step the current step.
*
* @return the panel.
*/
public WizardPanel getWizardPanel(final int step) {
if (step < this.panels.size()) {
return (WizardPanel) this.panels.get(step);
}
else {
return null;
}
}
/**
* Handles events.
*
* @param event the event.
*/
public void actionPerformed(final ActionEvent event) {
final String command = event.getActionCommand();
if (command.equals("nextButton")) {
next();
}
else if (command.equals("previousButton")) {
previous();
}
else if (command.equals("finishButton")) {
finish();
}
}
/**
* Handles a click on the "previous" button, by displaying the previous panel in the sequence.
*/
public void previous() {
if (this.step > 0) {
final WizardPanel previousPanel = getWizardPanel(this.step - 1);
// tell the panel that we are returning
previousPanel.returnFromLaterStep();
final Container content = getContentPane();
content.remove(this.currentPanel);
content.add(previousPanel);
this.step = this.step - 1;
this.currentPanel = previousPanel;
setTitle("Step " + (this.step + 1));
enableButtons();
pack();
}
}
/**
* Displays the next step in the wizard sequence.
*/
public void next() {
WizardPanel nextPanel = getWizardPanel(this.step + 1);
if (nextPanel != null) {
if (!this.currentPanel.canRedisplayNextPanel()) {
nextPanel = this.currentPanel.getNextPanel();
}
}
else {
nextPanel = this.currentPanel.getNextPanel();
}
this.step = this.step + 1;
if (this.step < this.panels.size()) {
this.panels.set(this.step, nextPanel);
}
else {
this.panels.add(nextPanel);
}
final Container content = getContentPane();
content.remove(this.currentPanel);
content.add(nextPanel);
this.currentPanel = nextPanel;
setTitle("Step " + (this.step + 1));
enableButtons();
pack();
}
/**
* Finishes the wizard.
*/
public void finish() {
this.result = this.currentPanel.getResult();
setVisible(false);
}
/**
* Enables/disables the buttons according to the current step. A good idea would be to ask the
* panels to return the status...
*/
private void enableButtons() {
this.previousButton.setEnabled(this.step > 0);
this.nextButton.setEnabled(canDoNextPanel());
this.finishButton.setEnabled(canFinish());
this.helpButton.setEnabled(false);
}
/**
* Checks, whether the user cancelled the dialog.
*
* @return false.
*/
public boolean isCancelled() {
return false;
}
/**
* Creates a panel containing the user interface for the dialog.
*
* @return the panel.
*/
public JPanel createContent() {
final JPanel content = new JPanel(new BorderLayout());
content.setBorder(BorderFactory.createEmptyBorder(4, 4, 4, 4));
content.add((JPanel) this.panels.get(0));
final L1R3ButtonPanel buttons = new L1R3ButtonPanel("Help", "Previous", "Next", "Finish");
this.helpButton = buttons.getLeftButton();
this.helpButton.setEnabled(false);
this.previousButton = buttons.getRightButton1();
this.previousButton.setActionCommand("previousButton");
this.previousButton.addActionListener(this);
this.previousButton.setEnabled(false);
this.nextButton = buttons.getRightButton2();
this.nextButton.setActionCommand("nextButton");
this.nextButton.addActionListener(this);
this.nextButton.setEnabled(true);
this.finishButton = buttons.getRightButton3();
this.finishButton.setActionCommand("finishButton");
this.finishButton.addActionListener(this);
this.finishButton.setEnabled(false);
buttons.setBorder(BorderFactory.createEmptyBorder(4, 0, 0, 0));
content.add(buttons, BorderLayout.SOUTH);
return content;
}
}