GWT自定义按钮与文本上方的图标

Question

我想创建一个带有图标和文本的按钮,其中图标位于文本上方.

寻找信息我从Juri找到了这个答案.

有了它,我创建了自己的SquareButton类,如下所示:

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

/**
 * Square Button class
 * @author julio.palma.vazquez
 *
 */
public class SquareButton extends Button {

    /** Text to show. */
    private String text;

    /**
     * Constructor.
     */
    public SquareButton() {
        super();
    }

    public SquareButton(String text, ClickHandler clickHandler, ImageResource imageResource) {
        super(text, clickHandler);
        setResource(imageResource);
        setPixelSize(60, 60);
    }

    /**
     * Set image resource.
     * @param imageResource image resource
     */
    public void setResource(ImageResource imageResource){
        Image img = new Image(imageResource);
        String definedStyles = img.getElement().getAttribute("style");
        img.getElement().setAttribute("style", definedStyles + "; vertical-align:top;");
        DOM.insertBefore(getElement(), img.getElement(), DOM.getFirstChild(getElement()));
    }

    /**
     * Set text.
     * @param text text to show
     */
    @Override
    public void setText(String text) {
        this.text = text;
        Element span = DOM.createElement("span");
        span.setInnerText(text);
        span.setAttribute("style", "vertical-align:bottom; text-align: center;");

        DOM.insertChild(getElement(), span, 0);
   }

   /**
    * Get text.
    * @return text to show
    */
   @Override
   public String getText() {
       return this.text;
   }
}

不幸的是,它不能像我期望的那样工作并输出图像上方的文字.

你能帮我个忙吗？

Answer 1

您可以在Button中设置HTML.您可以尝试以下方法:

Button button = new Button();
String html = "<div><center><img src = '"+GWT.getModuleBaseURL()+"/images/img1.png' height = '10px' width = '10px'></img></center><label>Text</label></br></div>";
button.setHTML(html);

为您的按钮和图像提供合适的尺寸.