mat.client.shared.MatButtonCell.java Source code

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Here is the source code for mat.client.shared.MatButtonCell.java

Source

package mat.client.shared;

/*
 * Copyright 2010 Google Inc.
 *
 * 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.
 */

import static com.google.gwt.dom.client.BrowserEvents.CLICK;
import static com.google.gwt.dom.client.BrowserEvents.KEYDOWN;

import com.google.gwt.cell.client.AbstractSafeHtmlCell;
import com.google.gwt.cell.client.ValueUpdater;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.EventTarget;
import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.text.shared.SafeHtmlRenderer;
import com.google.gwt.text.shared.SimpleSafeHtmlRenderer;

/**
 * A {@link Cell} used to render a button.
 */
public class MatButtonCell extends AbstractSafeHtmlCell<String> {

    /** The Button title. */
    String ButtonTitle = "";

    /** The css class. */
    String cssClass = "";

    /**
     * Construct a new ButtonCell that will use a {@link SimpleSafeHtmlRenderer}.
     */
    public MatButtonCell() {
        this(SimpleSafeHtmlRenderer.getInstance());
    }

    /**
      * Instantiates a new mat button cell.
      * 
      * @param ButtonTitle
      *            the button title
      * @param cssString
      *            the css string
      */
    public MatButtonCell(String ButtonTitle, String cssString) {
        this(SimpleSafeHtmlRenderer.getInstance());
        this.ButtonTitle = ButtonTitle;
        this.cssClass = cssString;
    }

    /**
     * Construct a new ButtonCell that will use a given {@link SafeHtmlRenderer}.
     * 
     * @param renderer a {@link SafeHtmlRenderer SafeHtmlRenderer<String>} instance
     */
    public MatButtonCell(SafeHtmlRenderer<String> renderer) {
        super(renderer, CLICK, KEYDOWN);
    }

    /* (non-Javadoc)
     * @see com.google.gwt.cell.client.AbstractCell#onBrowserEvent(com.google.gwt.cell.client.Cell.Context, com.google.gwt.dom.client.Element, java.lang.Object, com.google.gwt.dom.client.NativeEvent, com.google.gwt.cell.client.ValueUpdater)
     */
    @Override
    public void onBrowserEvent(Context context, Element parent, String value, NativeEvent event,
            ValueUpdater<String> valueUpdater) {
        super.onBrowserEvent(context, parent, value, event, valueUpdater);
        if (CLICK.equals(event.getType())) {
            EventTarget eventTarget = event.getEventTarget();
            if (!Element.is(eventTarget)) {
                return;
            }
            if (parent.getFirstChildElement().isOrHasChild(Element.as(eventTarget))) {
                // Ignore clicks that occur outside of the main element.
                onEnterKeyDown(context, parent, value, event, valueUpdater);
            }
        }
    }

    /* (non-Javadoc)
     * @see com.google.gwt.cell.client.AbstractSafeHtmlCell#render(com.google.gwt.cell.client.Cell.Context, com.google.gwt.safehtml.shared.SafeHtml, com.google.gwt.safehtml.shared.SafeHtmlBuilder)
     */
    @Override
    public void render(Context context, SafeHtml data, SafeHtmlBuilder sb) {

        sb.appendHtmlConstant("<button type=\"button\" title=\" " + ButtonTitle + "\" tabindex=\"0\" class=\" "
                + cssClass + "\">");
        if (data != null) {
            sb.append(data);
        }
        sb.appendHtmlConstant("</button>");
    }

    /* (non-Javadoc)
     * @see com.google.gwt.cell.client.AbstractCell#onEnterKeyDown(com.google.gwt.cell.client.Cell.Context, com.google.gwt.dom.client.Element, java.lang.Object, com.google.gwt.dom.client.NativeEvent, com.google.gwt.cell.client.ValueUpdater)
     */
    @Override
    protected void onEnterKeyDown(Context context, Element parent, String value, NativeEvent event,
            ValueUpdater<String> valueUpdater) {
        if (valueUpdater != null) {
            valueUpdater.update(value);
        }
    }
}