多上传器渲染问题（GET + mvp4g）

Question

我正在使用MultiUploader，有时会裁剪“上传器”按钮。只有在页面加载时才会发生上传按钮是不可见的。当我进一步使其可见时，按钮变为可见，但裁剪。如果使用param = true加载页面，一切正常。

//mvp4g is used
public void onEventBusEventName(boolean param) {
 ...
 view.uploader.setVisible(param);
 ...
 this.view.logoUploader.setI18Constants(UiConstants.INSTANCE);
 this.view.logoUploader.setStyleName("logo-uploader");
 view.logoUploader.addOnFinishUploadHandler(new IUploader.OnFinishUploaderHandler() {
  @Override
  public void onFinish(IUploader uploader) {
   if (uploader.getStatus() == IUploadStatus.Status.SUCCESS) {
    String fileId = uploader.getFileInput().getName();
    updateLogo(fileId);
   } else {
    Window.alert(uploader.getStatus().toString());
   }
  }
 });
 ...
 eventBus.setCenterContent(view); //setting root widget to specified view currently showing
}

它看起来如何： http://imgur.com/i0rxerJ.jpg

ClassView中：

@UiField
MultiUploader logoUploader;

ClassViewUi：

<gwtupload:MultiUploader type="BUTTON" ui:field="logoUploader" title="Upload new logo"
                                     avoidRepeatFiles="true" maximumFiles="1"
                                     validExtensions="jpg,png,jpeg,bmp"/>

Css：

.logo-uploader {
 margin-bottom: 10px;
 float: left;
}

.logo-uploader .gwt-Button {
 display: inline-block;
 width: 171px;
 height: 26px;
 background: url(../i/sprite.png) -1px -335px no-repeat;
 text-align: center;
 text-decoration: none;
 line-height: 1;
 border: none;
 color: #195c84;
 cursor: pointer;
}
.logo-uploader .gwt-Button:hover {
 background: url(../i/sprite.png) -1px -362px no-repeat;
}