org.activiti.kickstart.ui.MainMenuBar.java Source code

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Here is the source code for org.activiti.kickstart.ui.MainMenuBar.java

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/* 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 org.activiti.kickstart.ui;

import java.util.HashMap;
import java.util.Map;

import org.activiti.kickstart.KickstartApplication;

import com.vaadin.terminal.Resource;
import com.vaadin.ui.Alignment;
import com.vaadin.ui.Button;
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.themes.Reindeer;

/**
 * @author Joram Barrez
 * @author Frederik Heremans
 */
@SuppressWarnings("serial")
public class MainMenuBar extends HorizontalLayout {

    private static final long serialVersionUID = 1L;

    public static final String MENU_ITEM_CREATE_WORKFLOW = "create-workflow";
    public static final String MENU_ITEM_EDIT_WORKFLOW = "edit-workflow";
    public static final String MENU_ITEM_SETTINGS = "settings";

    private static final String STYLE_APPLICATION_LOGO = "logo";
    private static final String STYLE_ACTIVE = "active";
    private static final String STYLE_MAIN_MENU_BUTTON = "main-menu-button";

    protected Map<String, Button> menuItemButtons;
    protected String currentMainNavigation;

    public MainMenuBar() {
        menuItemButtons = new HashMap<String, Button>();
        init();
    }

    /**
     * Highlights the given main navigation in the menubar.
     */
    public synchronized void setMainNavigation(String navigation) {
        if (currentMainNavigation != null) {
            menuItemButtons.get(currentMainNavigation).removeStyleName(STYLE_ACTIVE);
        }
        currentMainNavigation = navigation;

        Button current = menuItemButtons.get(navigation);
        if (current != null) {
            current.addStyleName(STYLE_ACTIVE);
        }
    }

    protected void init() {
        setHeight(54, UNITS_PIXELS);
        setWidth(100, UNITS_PERCENTAGE);

        setMargin(false, true, false, false);

        initTitle();
        initButtons();
    }

    protected void initTitle() {
        Label title = new Label();
        title.addStyleName(Reindeer.LABEL_H1);
        title.addStyleName(STYLE_APPLICATION_LOGO);

        addComponent(title);
        setComponentAlignment(title, Alignment.MIDDLE_LEFT);
        setExpandRatio(title, 0.5f);
    }

    protected void initButtons() {
        Button taskButton = addMenuButton("Create", Images.MAIN_MENU_CREATE_WORKFLOW, false, 80);
        taskButton.addListener(new CreateWorkflowButtonClickListener());
        menuItemButtons.put(MENU_ITEM_CREATE_WORKFLOW, taskButton);

        Button processButton = addMenuButton("Edit", Images.MAIN_MENU_EDIT_WORKFLOW, false, 80);
        processButton.addListener(new EditWorkflowButtonClickListener());
        menuItemButtons.put(MENU_ITEM_EDIT_WORKFLOW, processButton);

        Button manageButton = addMenuButton("Settings", Images.MAIN_MENU_SETTINGS, false, 90);
        manageButton.addListener(new SettingsClickListener());
        menuItemButtons.put(MENU_ITEM_SETTINGS, manageButton);

        // To center the buttons
        Label invisibleLabel = new Label();
        addComponent(invisibleLabel);
        setExpandRatio(invisibleLabel, 0.5f);
    }

    protected Button addMenuButton(String label, Resource icon, boolean active, float width) {
        Button button = new Button(label);
        button.addStyleName(STYLE_MAIN_MENU_BUTTON);
        button.addStyleName(Reindeer.BUTTON_LINK);
        button.setHeight(54, UNITS_PIXELS);
        button.setIcon(icon);
        button.setWidth(width, UNITS_PIXELS);

        addComponent(button);
        setComponentAlignment(button, Alignment.TOP_CENTER);

        return button;
    }

    // Button Listener classes
    private class CreateWorkflowButtonClickListener implements ClickListener {
        public void buttonClick(ClickEvent event) {
            KickstartApplication.get().getViewManager().showCreateWorkflowPage();
        }
    }

    private class EditWorkflowButtonClickListener implements ClickListener {
        public void buttonClick(ClickEvent event) {
            KickstartApplication.get().getViewManager().showEditWorkflowPage();
        }
    }

    private class SettingsClickListener implements ClickListener {
        public void buttonClick(ClickEvent event) {
            KickstartApplication.get().getViewManager().showSettingsPage();
        }
    }
}