如何在RichTextArea中注册剪切/粘贴(通过jsni)方法?

时间:2012-08-20 00:58:26

标签: gwt javascript-events richtextbox

以下代码用于将属性样式设置为body元素并向其注册剪切/粘贴代码,但是失败。转义时,在调试时,变量body不为null且属性“style”存在,但框架没有此子项。运行工作不能按预期工作,并且在调用setBodyContent()

时NPE被抛出
public class TextAreaExt extends RichTextArea
{
private BodyElement body;

@Override
protected void onLoad()
{
    super.onLoad();
    body = ((FrameElement) getElement().cast())
                .getContentDocument().getBody();
    body.setAttribute("style", "color:gray;");
    registerOnCut(body);
}

public void setBodyContent(String text)
{
    body.setInnerText(text);
}

private native void registerOnCut(BodyElement element) /*-{
    var that = this;
    console.log("registerOnCut");
    element.oncut = $entry(function(event) {
        //invoke method to adjust height based on content
        return false;
    });
    element.onpaste = $entry(function(event) {
        //invoke method to adjust height based on content
        return false;
    });
}-*/;
}

1 个答案:

答案 0 :(得分:0)

请勿调用onLoad方法初始化正文,并使用addInitializeHandler初始化正文。

  this.addInitializeHandler(new InitializeHandler() {

        @Override
        public void onInitialize(InitializeEvent event) {
            body = ((FrameElement)getElement().cast()).getContentDocument().getBody();
            registerOnCut(body);
        }
    });