javascript - MGWT ScrollPanel.scrollTo(0，y)导致无法读取未定义的属性“样式”

我使用MGWT的ScrollPanel并执行以下操作：

  private void scrollToBottom() {
    if (getUiHandlers().isVisible()) {
      final int height = scrollPanel.getOffsetHeight();
      final int heightInt = cellList.getOffsetHeight();
      final int y = scrollPanel.getMaxScrollY();

      if (heightInt >= height) {
          scrollPanel.scrollTo(0, y);
      }
    }
  }

当涉及到这一行：

scrollPanel.scrollTo(0, y)

我收到以下错误：

UncaughtException: (TypeError) : Cannot read property 'style' of undefined
UncaughtException details: setDelay_1_g$
UncaughtException details: setTransitionsDelay_0_g$
UncaughtException details: scrollbarPos_0_g$
UncaughtException details: pos_1_g$
UncaughtException details: execute_30_g$
UncaughtException details: startAnimation_0_g$
UncaughtException details: scrollTo_7_g$
UncaughtException details: scrollTo_6_g$
UncaughtException details: scrollTo_5_g$
UncaughtException details: scrollTo_3_g$

如何防止此错误？

最佳答案

从源代码和堆栈跟踪来看，您似乎在遇到滚动条问题。调用scrollTo时，mgwt滚动面板是否始终有滚动？

另外，我强烈建议您将scrollPanel.scrollTo(0, y);调用包装到Scheduler.get().scheduleDeffered(..your scrollTo call here在此处输入代码..)