org.pepstock.jem.gwt.client.commons.ImageAndTextButton.java Source code

Introduction

Here is the source code for org.pepstock.jem.gwt.client.commons.ImageAndTextButton.java

Source

/**
JEM, the BEE - Job Entry Manager, the Batch Execution Environment
Copyright (C) 2012-2015  Marco "Fuzzo" Cuccato
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
any later version.
    
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
package org.pepstock.jem.gwt.client.commons;

import org.pepstock.jem.log.JemRuntimeException;

import com.google.gwt.dom.client.Element;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Image;

/**
 * Builds a button with both image and a text 
 * @author Marco "Fuzzo" Cuccato
 *
 */
public final class ImageAndTextButton extends Button {

    private static final String TEXT_LEFT_PADDING = " ";

    static {
        Styles.INSTANCE.common().ensureInjected();
    }

    /**
     * Used to set if the text should be at right or at bottom of image 
     * @author Marco "Fuzzo" Cuccato
     */
    public enum TextPosition {
        /**
         * Constant to be used to set the text next to image
         */
        RIGHT,
        /**
         * Constant to be used to set the text under the image
         */
        BOTTOM;
    }

    private String label;
    private TextPosition textPosition = TextPosition.RIGHT;

    /**
     * Builds the button with the necessary parts 
     * @param icon the {@link ImageResource} to be used as the button image
     * @param label the button label
     * @param position the {@link TextPosition}
     */
    public ImageAndTextButton(ImageResource icon, String label, TextPosition position) {
        this.textPosition = position;
        setText(label);
        setIcon(icon);
        // overrides min/max height/width css default attributes
        addStyleName(Styles.INSTANCE.common().noMinMaxHeightWidth());
    }

    /**
     * Set the button icon
     * @param imageResource the {@link ImageResource} to be used
     */
    public final void setIcon(ImageResource imageResource) {
        Image img = new Image(imageResource);
        img.addStyleName(Styles.INSTANCE.common().verticalAlignMiddle());
        DOM.insertBefore(getElement(), img.getElement(), DOM.getFirstChild(getElement()));
    }

    @Override
    public final void setText(String text) {
        this.label = text;
        Element textElement;
        switch (textPosition) {
        case RIGHT:
            textElement = DOM.createElement("span");
            textElement.setInnerText(TEXT_LEFT_PADDING + text);
            break;
        case BOTTOM:
            textElement = DOM.createElement("div");
            textElement.setInnerText(text);
            break;
        default:
            throw new JemRuntimeException("Unable to know text position");
        }
        textElement.addClassName(Styles.INSTANCE.common().verticalAlignMiddle());
        DOM.insertChild(getElement(), textElement, 0);
    }

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

}