C++ (Cpp) toLayoutListBox示例

示例#1

文件： AutoscrollController.cpp 项目： alexanderbill/blink-crosswalk

void AutoscrollController::startAutoscrollForSelection(LayoutObject* layoutObject)
{
    // We don't want to trigger the autoscroll or the panScroll if it's already active
    if (m_autoscrollType != NoAutoscroll)
        return;
    LayoutBox* scrollable = LayoutBox::findAutoscrollable(layoutObject);
    if (!scrollable)
        scrollable = layoutObject->isListBox() ? toLayoutListBox(layoutObject) : nullptr;
    if (!scrollable)
        return;
    m_autoscrollType = AutoscrollForSelection;
    m_autoscrollLayoutObject = scrollable;
    startAutoscroll();
}

示例#2

void AutoscrollController::startAutoscrollForSelection(
    LayoutObject* layoutObject) {
  // We don't want to trigger the autoscroll or the middleClickAutoscroll if
  // it's already active.
  if (m_autoscrollType != NoAutoscroll)
    return;
  if (layoutObject)
    layoutObject->frameView()->updateAllLifecyclePhasesExceptPaint();
  LayoutBox* scrollable = LayoutBox::findAutoscrollable(layoutObject);
  if (!scrollable)
    scrollable =
        layoutObject->isListBox() ? toLayoutListBox(layoutObject) : nullptr;
  if (!scrollable)
    return;

  m_pressedLayoutObject = layoutObject && layoutObject->isBox()
                              ? toLayoutBox(layoutObject)
                              : nullptr;
  m_autoscrollType = AutoscrollForSelection;
  m_autoscrollLayoutObject = scrollable;
  startAutoscroll();
}