org.kaaproject.kaa.server.admin.client.mvp.view.widget.ImageTextButton.java Source code

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Here is the source code for org.kaaproject.kaa.server.admin.client.mvp.view.widget.ImageTextButton.java

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/*
 * Copyright 2014-2016 CyberVision, 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.
 */

package org.kaaproject.kaa.server.admin.client.mvp.view.widget;

import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.safehtml.shared.SafeUri;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.ui.Button;

@SuppressWarnings("deprecation")
public class ImageTextButton extends Button {
    private String text;

    public ImageTextButton(ImageResource imageResource, String text) {
        this(imageResource, text, null);
    }

    public ImageTextButton(ImageResource imageResource, String text, ClickHandler clickHandler) {
        super();
        if (clickHandler != null) {
            addClickHandler(clickHandler);
        }
        String definedStyles = getElement().getAttribute("style");
        getElement().setAttribute("style", definedStyles + "; vertical-align:middle;");
        this.text = text;
        Element span = DOM.createElement("span");
        span.setInnerText(text);
        DOM.insertChild(getElement(), span, 0);
        Element imageSpan = DOM.createElement("span");
        int spacing;
        if (this.text == null || this.text.trim().equals("")) {
            spacing = 0;
        } else {
            spacing = 16;
        }

        updateImageElementFromImageResource(imageSpan, imageResource, spacing);
        DOM.insertBefore(getElement(), imageSpan, DOM.getFirstChild(getElement()));
    }

    @Override
    public String getText() {
        return this.text;
    }

    private void updateImageElementFromImageResource(Element imageSpan, ImageResource res, int spacing) {
        SafeUri url = res.getSafeUri();
        int width = res.getWidth();
        int height = res.getHeight();
        int paddingRight = width + spacing;
        String style = "url(\"" + url.asString() + "\") no-repeat scroll left center";
        imageSpan.getStyle().setProperty("background", style);
        imageSpan.getStyle().setPropertyPx("width", width);
        imageSpan.getStyle().setPropertyPx("height", height);
        imageSpan.getStyle().setPropertyPx("paddingRight", paddingRight);
    }

}