org.glom.web.client.ui.details.SingleLineText.java Source code

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Here is the source code for org.glom.web.client.ui.details.SingleLineText.java

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/*
 * Copyright (C) 2011 Ben Konrath <ben@bagu.org>
 *
 * This file is part of GWT-Glom.
 *
 * GWT-Glom is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * GWT-Glom 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with GWT-Glom.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.glom.web.client.ui.details;

import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.Style;
import com.google.gwt.dom.client.Style.Overflow;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.logical.shared.ResizeEvent;
import com.google.gwt.event.logical.shared.ResizeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Anchor;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.Widget;

/**
 * @author Ben Konrath <ben@bagu.org>
 * 
 */
public class SingleLineText extends Composite {

    HandlerRegistration resizeHandlerReg;

    public SingleLineText(final String text) {
        Widget dataWidget;
        if (text.startsWith("http://") || text.startsWith("ftp://")) {
            dataWidget = new Anchor(text, text, "_blank");
            dataWidget.setStyleName("dataLink");
        } else if (text.startsWith("www.")) {
            dataWidget = new Anchor(text, "http://" + text, "_blank");
            dataWidget.setStyleName("dataLink");
        } else {
            final Label dataLabel = new Label();
            dataLabel.setText(text);
            dataWidget = dataLabel;
        }

        final Style style = dataWidget.getElement().getStyle();
        style.setOverflow(Overflow.HIDDEN);
        style.setProperty("textOverflow", "ellipsis");

        initWidget(dataWidget);
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.google.gwt.user.client.ui.Widget#onLoad()
     */
    @Override
    protected void onLoad() {
        setNewWidth();
        getElement().getStyle().setProperty("whiteSpace", "nowrap");

        resizeHandlerReg = Window.addResizeHandler(new ResizeHandler() {

            @Override
            public void onResize(final ResizeEvent event) {
                setNewWidth();
            }
        });

    }

    /*
     * (non-Javadoc)
     * 
     * @see com.google.gwt.user.client.ui.Widget#onUnload()
     */
    @Override
    protected void onUnload() {
        resizeHandlerReg.removeHandler();
    }

    private void setNewWidth() {
        // Don't set the width if a navigation button is present.
        if (getElement().getParentElement().getNextSiblingElement() != null) {
            return;
        }

        // Set the new width.
        final int parentWidth = getElement().getParentElement().getParentElement().getOffsetWidth();
        final int labelWidth = getElement().getParentElement().getPreviousSibling().<Element>cast()
                .getOffsetWidth();
        // Make the new width slights smaller than it should be so that it doesn't fall into a second line.
        final int newWidth = parentWidth - labelWidth - 2;
        // Don't set negative widths.
        if (newWidth >= 0) {
            getElement().getParentElement().getStyle().setWidth(newWidth, Unit.PX);
        }
    }
}