org.freemedsoftware.gwt.client.widget.BlockScreenWidget.java Source code

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Here is the source code for org.freemedsoftware.gwt.client.widget.BlockScreenWidget.java

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/*
 * $Id$
 *
 * Authors:
 *      Jeff Buchbinder <jeff@freemedsoftware.org>
 *
 * FreeMED Electronic Medical Record and Practice Management System
 * Copyright (C) 1999-2012 FreeMED Software Foundation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
package org.freemedsoftware.gwt.client.widget;

import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.VerticalPanel;

/**
 * Display "blocking" screen which does not allow user interaction to occur
 * underneath it.
 */
public class BlockScreenWidget extends VerticalPanel {

    protected HTML blockOuterDiv = null;

    protected HTML blockInnerDiv = null;

    @SuppressWarnings("unused")
    private BlockScreenWidget() {
    }

    public BlockScreenWidget(String msg) {
        this.setWidth("100%");
        String blockDivOuterStr = "<div style=\"border: medium none ; margin: 0pt; padding: 0pt;";
        blockDivOuterStr += " z-index: 1000; width: " + Window.getClientWidth() + "; height: "
                + Window.getClientHeight() + "; top: 0pt; left: 0pt;";
        blockDivOuterStr += " background-color: rgb(0, 0, 0); filter: alpha(opacity = 60);opacity: 0.6; cursor: wait;";
        blockDivOuterStr += "  position: absolute;\" class=\"blockUI blockOverlay\" title=\"Please wait...\"";
        blockDivOuterStr += "/>";
        blockOuterDiv = new HTML(blockDivOuterStr);
        setText(msg);
        this.add(blockOuterDiv);
    }

    /**
     * Set HTML text displayed on widget. This method does not escape or HTML
     * format raw text.
     * 
     * @param msg
     *            HTML-formatted and escaped text to be displayed.
     */
    public void setText(String msg) {
        if (this.getWidgetIndex(blockInnerDiv) != -1) {
            this.remove(blockInnerDiv);
        }
        String blockDivInnerStr = "  <div style='border: medium none ; margin: 0px; padding: 15px; z-index: 1100;";
        blockDivInnerStr += " position: absolute; width: 30%; top: 40%; left: 35%; text-align: center; color: rgb(255, 255, 255);";
        blockDivInnerStr += " cursor: wait;";
        blockDivInnerStr += " filter: alpha(opacity = 50);opacity: 0.5;'>";
        blockDivInnerStr += "<img src=\"" + GWT.getHostPageBaseURL() + "resources/images/loading.gif"
                + "\" style=' margin-left: auto;margin-right: auto;'/><br/>";
        blockDivInnerStr += "<h1>" + msg + "</h1></div>";
        blockInnerDiv = new HTML(blockDivInnerStr);
        this.add(blockInnerDiv);
    }

}