org.rstudio.core.client.cellview.ImageButtonColumn.java Source code

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Here is the source code for org.rstudio.core.client.cellview.ImageButtonColumn.java

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/*
 * ImageButtonColumn.java
 *
 * Copyright (C) 2009-12 by RStudio, Inc.
 *
 * Unless you have received this program directly from RStudio pursuant
 * to the terms of a commercial license agreement with RStudio, then
 * this program is licensed to you under the terms of version 3 of the
 * GNU Affero General Public License. This program is distributed WITHOUT
 * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
 * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
 *
 */
package org.rstudio.core.client.cellview;

import org.rstudio.core.client.widget.OperationWithInput;

import com.google.gwt.cell.client.ButtonCell;
import com.google.gwt.cell.client.FieldUpdater;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.cellview.client.Column;
import com.google.gwt.user.client.ui.AbstractImagePrototype;

public class ImageButtonColumn<T> extends Column<T, String> {
    public ImageButtonColumn(final AbstractImagePrototype imagePrototype, final OperationWithInput<T> onClick,
            final String title) {
        super(new ButtonCell() {
            @Override
            public void render(Context context, SafeHtml value, SafeHtmlBuilder sb) {
                if (value != null) {
                    sb.appendHtmlConstant("<span title=\"" + title + "\" " + "style=\"cursor: pointer;\">");
                    sb.appendHtmlConstant(imagePrototype.getHTML());
                    sb.appendHtmlConstant("</span>");
                }
            }
        });

        setFieldUpdater(new FieldUpdater<T, String>() {
            public void update(int index, T object, String value) {
                if (value != null)
                    onClick.execute(object);
            }
        });
    }

    @Override
    public String getValue(T object) {
        if (showButton(object))
            return new String();
        else
            return null;
    }

    protected boolean showButton(T object) {
        return true;
    }
}