com.audata.client.widgets.Wizard.java Source code

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Here is the source code for com.audata.client.widgets.Wizard.java

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/*
 * +----------------------------------------------------------------------+
 * | AuDoc 2                                                              |
 * +----------------------------------------------------------------------+
 * | Copyright (c) 2004-2007 Audata Ltd                                   |
 * +----------------------------------------------------------------------+
 * | This source file is subject to version 2 of the Gnu Public License,  |
 * | that is bundled with this package in the file License.txt, and is    |
 * | available at through the world-wide-web at                           |
 * | http://www.gnu.org/licenses/gpl.txt.                                 |
 * | If you did not receive a copy of the GPL license and are unable to   |
 * | obtain it through the world-wide-web, please send a note to          |
 * | support@audata.co.uk so we can mail you a copy immediately.          |
 * +----------------------------------------------------------------------+
 * | Authors: Jonathan Moss <jon.moss@audata.co.uk>                       |
 * +----------------------------------------------------------------------+ 
 */
package com.audata.client.widgets;

import java.util.HashMap;

import com.audata.client.Language;
import com.audata.client.feedback.SimpleDialog;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.DeckPanel;
import com.google.gwt.user.client.ui.HasAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

public class Wizard extends Composite implements ClickListener {

    private static final Language LANG = (Language) GWT.create(Language.class);
    private VerticalPanel main;
    private HorizontalPanel control;
    private DeckPanel pages;
    private HashMap values;
    private Button next;
    private Button prev;
    private Button finish;

    private WizardListener listener;

    public Wizard(String title, WizardListener listener) {
        this.listener = listener;
        this.values = new HashMap();
        this.main = new VerticalPanel();
        this.main.setHeight("100%");
        this.main.setWidth("100%");
        this.main.setSpacing(5);
        Label titleLabel = new Label(title);
        titleLabel.addStyleName("audoc-sectionTitle");
        this.main.add(titleLabel);

        this.pages = new DeckPanel();
        this.pages.setSize("100%", "100%");
        this.main.add(this.pages);

        this.control = new HorizontalPanel();
        this.control.setSpacing(5);
        this.control.setHorizontalAlignment(HasAlignment.ALIGN_RIGHT);
        this.control.setVerticalAlignment(HasAlignment.ALIGN_BOTTOM);

        this.prev = new Button(LANG.previous_Text());
        this.prev.addClickListener(this);
        this.prev.setVisible(false);

        this.next = new Button(LANG.next_Text());
        this.next.addClickListener(this);

        this.finish = new Button(LANG.finish_Text());
        this.finish.addClickListener(this);
        this.finish.setVisible(false);

        this.control.add(this.prev);
        this.control.add(this.next);
        this.control.add(this.finish);
        this.main.add(this.control);

        this.initWidget(this.main);
        this.setSize("100%", "100%");
    }

    public void onClick(Widget sender) {
        if (sender == this.next) {
            this.nextPage();
            return;
        }
        if (sender == this.prev) {
            this.prevPage();
            return;
        }
        if (sender == this.finish) {
            this.onFinish();
            return;
        }
    }

    private void nextPage() {
        WizardPage curPage = (WizardPage) this.pages.getWidget(this.pages.getVisibleWidget());
        WizardPage nextPage = (WizardPage) this.pages.getWidget(this.pages.getVisibleWidget() + 1);
        if (curPage.isValid()) {
            this.values.putAll(curPage.getValues());
            int next = this.pages.getVisibleWidget() + 1;
            int count = this.pages.getWidgetCount();
            if (next > 0) {
                this.prev.setVisible(true);
            }
            if (next == count - 1) {
                this.next.setVisible(false);
                this.finish.setVisible(true);
            }
            nextPage.onShow(this);
            this.pages.showWidget(next);
        } else {
            SimpleDialog.displayDialog(SimpleDialog.TYPE_MESSAGE, LANG.warning_Text(), LANG.wizard_invalid_Text());
        }
    }

    private void prevPage() {
        int prev = this.pages.getVisibleWidget() - 1;
        WizardPage prevPage = (WizardPage) this.pages.getWidget(prev);
        if (prev == 0) {
            this.prev.setVisible(false);
        }
        this.next.setVisible(true);
        this.finish.setVisible(false);
        prevPage.onShow(this);
        this.pages.showWidget(prev);
    }

    public void addPage(WizardPage page) {
        this.pages.add(page);
        this.pages.showWidget(0);
    }

    private void onFinish() {
        WizardPage curPage = (WizardPage) this.pages.getWidget(this.pages.getVisibleWidget());
        if (curPage.isValid()) {
            this.values.clear();
            for (int i = 0; i < this.pages.getWidgetCount(); i++) {
                WizardPage page = (WizardPage) this.pages.getWidget(i);
                this.values.putAll(page.getValues());
            }
            this.listener.onFinish(this, this.values);
        } else {
            SimpleDialog.displayDialog(SimpleDialog.TYPE_MESSAGE, LANG.warning_Text(), LANG.wizard_invalid_Text());
        }

    }

    public HashMap getValues() {
        return this.values;
    }

    public void reset() {
        this.values = new HashMap();
        for (int i = 0; i < this.pages.getWidgetCount(); i++) {
            WizardPage p = (WizardPage) this.pages.getWidget(i);
            p.reset();
        }
        this.pages.showWidget(0);
        WizardPage cPage = (WizardPage) this.pages.getWidget(0);
        cPage.onShow(this);

        this.next.setVisible(true);
        this.prev.setVisible(false);
        this.finish.setVisible(false);
    }
}