com.foc.helpBook.HelpUI.java Source code

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Here is the source code for com.foc.helpBook.HelpUI.java

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/*******************************************************************************
 * Copyright 2016 Antoine Nicolas SAMAHA
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package com.foc.helpBook;

import com.foc.Globals;
import com.foc.vaadin.FocCentralPanel;
import com.foc.vaadin.FocWebApplication;
import com.foc.vaadin.gui.components.FVButton;
import com.vaadin.server.VaadinRequest;
import com.vaadin.shared.ui.label.ContentMode;
import com.vaadin.ui.Alignment;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Button.ClickListener;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.themes.Runo;

@SuppressWarnings("serial")
public class HelpUI extends FocWebApplication {

    private FVButton nextPageButton = null;
    private FVButton previousPageButton = null;

    @Override
    public void init(VaadinRequest request) {
        super.init(request);
    }

    @Override
    public FocCentralPanel newWindow() {
        FocCentralPanel focCentralPanel = new FocCentralPanel();
        focCentralPanel.fill();

        Label labelHelpContent = new Label();
        labelHelpContent.setContentMode(ContentMode.HTML);

        String htmlContent = (String) FocWebApplication.getFocWebSession_Static().getParameter("HELP_CONTENT");
        labelHelpContent.setValue(htmlContent);
        VerticalLayout mainLayout = new VerticalLayout();

        mainLayout.setSizeFull();

        HorizontalLayout navigationLayout = new HorizontalLayout();
        navigationLayout.setWidth("95%");

        navigationLayout.addComponent(getPreviousPageButton());
        navigationLayout.setComponentAlignment(getPreviousPageButton(), Alignment.BOTTOM_LEFT);

        navigationLayout.addComponent(getNextPageButton());
        navigationLayout.setComponentAlignment(getNextPageButton(), Alignment.BOTTOM_RIGHT);

        mainLayout.addComponent(labelHelpContent);

        mainLayout.addComponent(navigationLayout);
        mainLayout.setComponentAlignment(navigationLayout, Alignment.BOTTOM_CENTER);

        focCentralPanel.addComponent(mainLayout);
        return focCentralPanel;
    }

    private FVButton getNextPageButton() {
        if (nextPageButton == null) {
            nextPageButton = new FVButton("Next");
            nextPageButton.setStyleName(Runo.BUTTON_LINK);

            nextPageButton.addClickListener(new ClickListener() {

                @Override
                public void buttonClick(ClickEvent event) {

                    int currentPageIndex = FocHelpBook.getInstance().getCurrentPageIndex();
                    int nextPageIndex = currentPageIndex + 1;

                    if (nextPageIndex < FocHelpBook.getInstance().getPagesArrayListSize()) {
                        changeHelpPage(nextPageIndex);
                    } else {
                        changeHelpPage(0);
                    }
                }
            });
        }
        return nextPageButton;
    }

    private FVButton getPreviousPageButton() {
        if (previousPageButton == null) {
            previousPageButton = new FVButton("Previous");
            previousPageButton.setStyleName(Runo.BUTTON_LINK);

            previousPageButton.addClickListener(new ClickListener() {

                @Override
                public void buttonClick(ClickEvent event) {
                    int currentPageIndex = FocHelpBook.getInstance().getCurrentPageIndex();
                    int previousPageIndex = currentPageIndex - 1;

                    if (previousPageIndex >= 0) {
                        changeHelpPage(previousPageIndex);
                    } else {
                        int lastPageIndex = FocHelpBook.getInstance().getLastPageIndex();
                        changeHelpPage(lastPageIndex);
                    }
                }
            });
        }
        return previousPageButton;
    }

    private void changeHelpPage(int pageIndex) {
        String focHelpPageCode = FocHelpBook.getInstance().getPageCodeByPageIndex(pageIndex);
        if (focHelpPageCode != null && !focHelpPageCode.isEmpty()) {
            FocHelpPage focHelpPage = FocHelpBook.getInstance().getPage(focHelpPageCode);
            if (focHelpPage != null) {
                FocWebApplication.getFocWebSession_Static().putParameter("HELP_CONTENT",
                        focHelpPage.getHelpMessage());
                FocCentralPanel centralComponent = newWindow();
                setContent(centralComponent);
            }
        }
    }

    @Override
    public String getThemeName() {
        return Globals.getIFocNotification() != null ? Globals.getIFocNotification().getThemeName() : "";
    }
}