org.openremote.web.console.widget.ScreenIndicator.java Source code

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Here is the source code for org.openremote.web.console.widget.ScreenIndicator.java

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/* OpenRemote, the Home of the Digital Home.
* Copyright 2008-2012, OpenRemote Inc.
*
* See the contributors.txt file in the distribution for a
* full listing of individual contributors.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.openremote.web.console.widget;

import java.util.ArrayList;
import java.util.List;

import org.openremote.web.console.event.ConsoleUnitEventManager;
import org.openremote.web.console.event.ui.ScreenViewChangeEvent;
import org.openremote.web.console.event.ui.ScreenViewChangeHandler;
import org.openremote.web.console.util.BrowserUtils;

import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.SimplePanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * 
 *  
 * @author <a href="mailto:richard@openremote.org">Richard Turner</a>
 */
public class ScreenIndicator extends PassiveConsoleComponent implements ScreenViewChangeHandler {
    private static final String CLASS_NAME = "screenIndicatorComponent";
    private static final String ITEM_CLASS_NAME = "screenIndicatorItem";
    private static final String SPACER_CLASS_NAME = "screenIndicatorSpacer";
    private static int INDICATOR_SIZE = 6;
    private List<Integer> screenIds;
    private List<Widget> screenIndicators;

    static {
        int[] size;
        size = BrowserUtils.getSizeFromStyle(ITEM_CLASS_NAME);
        INDICATOR_SIZE = size[1] == 0 ? INDICATOR_SIZE : size[1];
    }

    public ScreenIndicator(List<Integer> screenIds) {
        super(new HorizontalPanel(), CLASS_NAME);
        HorizontalPanel container = (HorizontalPanel) getWidget();
        DOM.setIntStyleAttribute(getElement(), "zIndex", 1000);
        DOM.setStyleAttribute(getElement(), "overflow", "hidden");
        container.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);
        this.screenIds = screenIds;
        screenIndicators = new ArrayList<Widget>();

        if (screenIds != null) {
            width = INDICATOR_SIZE * ((screenIds.size() * 2) - 1);
            setWidth(width + "px");
            setHeight(INDICATOR_SIZE + "px");
            height = INDICATOR_SIZE;

            // Add a simple div for each screen
            for (int i = 0; i < screenIds.size(); i++) {
                int cellWidth = INDICATOR_SIZE;
                //cellWidth = i != screenIds.size()-1 ? cellWidth + INDICATOR_SPACING : cellWidth;
                Widget screenIndicator = new SimplePanel();
                screenIndicator.setWidth(INDICATOR_SIZE + "px");
                screenIndicator.setHeight(INDICATOR_SIZE + "px");
                screenIndicator.setStylePrimaryName(ITEM_CLASS_NAME);
                screenIndicators.add(screenIndicator);
                container.add(screenIndicator);
                container.setCellWidth(screenIndicator, cellWidth + "px");

                if (i < screenIds.size() - 1) {
                    // Add a spacer
                    Widget spacer = new SimplePanel();
                    spacer.setWidth(INDICATOR_SIZE + "px");
                    spacer.setHeight(INDICATOR_SIZE + "px");
                    spacer.setStylePrimaryName(SPACER_CLASS_NAME);
                    container.add(spacer);
                    container.setCellWidth(spacer, cellWidth + "px");
                }
            }
        }
    }

    public int getWidth() {
        return width;
    }

    public int getHeight() {
        return INDICATOR_SIZE;
    }

    // ---------------------------------------------------------------------------------
    //         SUPER CLASS OVERRIDES BELOW
    // ---------------------------------------------------------------------------------

    @Override
    public void onAdd(int width, int height) {
        onRender(width, height);
        setVisible(true);
        isInitialised = true;
    }

    @Override
    public void onRender(int width, int height) {
        if (!isInitialised) {
            // Register screen change handler
            registerHandler(ConsoleUnitEventManager.getInstance().getEventBus()
                    .addHandler(ScreenViewChangeEvent.getType(), this));
        }
    }

    @Override
    public void onUpdate(int width, int height) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onScreenViewChange(ScreenViewChangeEvent event) {
        if (!handlersRegistered) {
            return;
        }
        // Cycle through indicators to find this screen id
        for (int i = 0; i < screenIds.size(); i++) {
            if (screenIds.get(i) == event.getNewScreenId()) {
                screenIndicators.get(i).addStyleName("selected");
            } else {
                screenIndicators.get(i).removeStyleName("selected");
            }
        }
    }
}