org.jrydberg.ui.client.ButtonBar.java Source code

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Here is the source code for org.jrydberg.ui.client.ButtonBar.java

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/**
 * Copyright 2010 Johan Rydberg
 *
 * 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.jrydberg.ui.client;

import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.resources.client.ClientBundle;
import com.google.gwt.resources.client.CssResource;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * @author jrydberg
 *
 */
public class ButtonBar extends FlowPanel {

    public interface Css extends CssResource {
        String buttonBar();

        String button();

        String left();

        String middle();

        String right();

    }

    public interface Resources extends ClientBundle {
        Resources INSTANCE = (Resources) GWT.create(Resources.class);

        @Source("resources/ButtonBar.css")
        Css buttonBarCss();
    }

    private final Resources resources;

    private int currentOffset = 0;

    public ButtonBar() {
        this(Resources.INSTANCE);
    }

    public ButtonBar(Resources resources) {
        this.resources = resources;
        resources.buttonBarCss().ensureInjected();
        setStyleName(resources.buttonBarCss().buttonBar());
    }

    public ButtonBar add(Widget button, int width) {
        button.addStyleName(resources.buttonBarCss().button());
        button.getElement().getStyle().setLeft(currentOffset, Unit.PX);
        button.getElement().getStyle().setWidth(width, Unit.PX);

        if (getWidgetCount() == 0) {
            button.addStyleName(resources.buttonBarCss().left());
        } else {
            Widget oldButton = getWidget(getWidgetCount() - 1);
            if (getWidgetCount() > 1) {
                oldButton.removeStyleName(resources.buttonBarCss().right());
                oldButton.addStyleName(resources.buttonBarCss().middle());
            }
            button.addStyleName(resources.buttonBarCss().right());
        }
        add(button);
        currentOffset += width;

        return this;
    }

    public static ButtonBar create() {
        return new ButtonBar();
    }

    public static ButtonBar create(Resources resources) {
        return new ButtonBar(resources);
    }

}