de.swm.commons.mobile.client.widgets.command.CommandPopup.java Source code

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Here is the source code for de.swm.commons.mobile.client.widgets.command.CommandPopup.java

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/*
 * Copyright 2011 SWM Services GmbH.
 * 
 * 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 de.swm.commons.mobile.client.widgets.command;

import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.Widget;
import de.swm.commons.mobile.client.SWMMobile;
import de.swm.commons.mobile.client.widgets.HorizontalPanel;
import de.swm.commons.mobile.client.widgets.VerticalPanel;

/**
 * Shows a popup panel which can contain a array of widgets like buttons.
 * 
 * <pre>
 * final CommandPopup commandPopup = new CommandPopup(&quot;Select a command&quot;, resources.information(), new Widget[] {
 *       textLabel, okButton, cancelButton });
 * okButton.addClickHandler(new ClickHandler() {
 * 
 *    &#064;Override
 *    public void onClick(ClickEvent event) {
 *       Utils.console(&quot;ok clicked&quot;);
 *       commandPopup.hide();
 *    }
 * });
 * cancelButton.addClickHandler(new ClickHandler() {
 * 
 *    &#064;Override
 *    public void onClick(ClickEvent event) {
 *       Utils.console(&quot;cancel clicked&quot;);
 *       commandPopup.hide();
 *    }
 * });
 * commandPopup.showCentered(true);
 * </pre>
 * 
 */
public class CommandPopup extends PopupPanel {

    private static final double PADDING = 6.0;

    /**
     * Default constructor.
     * @param caption the caption
     * @param image the image displayed in the left upper corner.
     * @param widgets list of widgets.
     */
    public CommandPopup(String caption, ImageResource image, Widget[] widgets) {
        setStyleName(SWMMobile.getTheme().getMGWTCssBundle().getPopupsCss().commandPopup());
        setGlassStyleName(SWMMobile.getTheme().getMGWTCssBundle().getPopupsCss().commandGlassPanel());
        VerticalPanel vPanel = new VerticalPanel();
        if (caption != null) {
            Label captionLabel = new Label(caption);
            if (image != null) {
                HorizontalPanel hPanel = new HorizontalPanel();
                hPanel.add(new Image(image));
                captionLabel.getElement().getStyle().setPaddingLeft(PADDING, Unit.PX);
                hPanel.add(captionLabel);
                vPanel.add(hPanel);
            } else {
                vPanel.add(captionLabel);
            }
        }
        for (Widget w : widgets) {
            vPanel.add(w);
        }
        setWidget(vPanel);
    }

    /**
     * Will display the command popup in the center of the display
     * 
     * @param glassEffect
     *            true if glass effect should be applied.
     */
    public void showCentered(boolean glassEffect) {
        setGlassEnabled(glassEffect);
        setPopupPositionAndShow(new PositionCallback() {

            @Override
            public void setPosition(int offsetWidth, int offsetHeight) {
                int left = (Window.getClientWidth() - offsetWidth) / 2;
                int top = (Window.getClientHeight() - offsetHeight) / 2;
                setPopupPosition(left, top);
            }
        });
    }

}