org.mklab.taskit.client.ui.cell.TooltipCell.java Source code

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Here is the source code for org.mklab.taskit.client.ui.cell.TooltipCell.java

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/*
 * 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 org.mklab.taskit.client.ui.cell;

import com.google.gwt.cell.client.AbstractCell;
import com.google.gwt.cell.client.ValueUpdater;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * @author ishikura
 * @param <C> ??
 */
public abstract class TooltipCell<C> extends AbstractCell<C> {

    /**
     * {@link TooltipCell}???
     */
    public TooltipCell() {
        super("click"); //$NON-NLS-1$
    }

    /**
     * {@inheritDoc}
     */
    @SuppressWarnings({ "nls", "unused" })
    @Override
    public void render(com.google.gwt.cell.client.Cell.Context context, C value, SafeHtmlBuilder sb) {
        sb.appendHtmlConstant(
                "<a href='#' onclick='return false' style='background-color:#bbb;color:#fff;font-size:0.5em;font-weight:bold;cursor:hand;'>");
        sb.appendEscaped("?");
        sb.appendHtmlConstant("</a>");
    }

    /**
     * {@inheritDoc}
     */
    @SuppressWarnings({ "nls", "unused" })
    @Override
    public void onBrowserEvent(com.google.gwt.cell.client.Cell.Context context, Element parent, C value,
            NativeEvent event, ValueUpdater<C> valueUpdater) {
        if ("click".equals(event.getType()) == false)
            return;

        final PopupPanel popup = new PopupPanel();
        popup.setAutoHideEnabled(true);
        popup.add(getTooltipOf(value));
        popup.setPopupPosition(event.getClientX(), event.getClientY());
        popup.show();
    }

    /**
     * ???????
     * 
     * @param value 
     * @return ??
     */
    protected abstract Widget getTooltipOf(C value);
}