Method sendEvent

source/windowing/StarScrollArea.cpp:329–385

}

bool ScrollArea::sendEvent(InputEvent const& event) {
  if (!m_visible)
    return false;

  if (m_dragActive) {
    if (event.is<MouseButtonUpEvent>()) {
      blur();
      m_dragActive = false;
      m_vBar->thumb()->setPressed(false);
      m_hBar->thumb()->setPressed(false);
      return true;
    } else if (event.is<MouseMoveEvent>()) {
      auto thumbDragPosition = *context()->mousePosition(event) - screenPosition() - m_dragOffset;
      if (m_dragDirection == GuiDirection::Vertical) {
        m_scrollOffset = m_vBar->offsetFromThumbPosition(thumbDragPosition);
      } else {
        m_scrollOffset = m_hBar->offsetFromThumbPosition(thumbDragPosition);
      }
      return true;
    }
  }

  auto mousePos = context()->mousePosition(event);
  if (mousePos && !inMember(*mousePos))
    return false;

  if (event.is<MouseButtonDownEvent>()) {
    if (m_vBar->thumb()->inMember(*mousePos)) {
      focus();
      m_dragOffset = *mousePos - screenPosition() - m_vBar->thumb()->position();
      m_dragDirection = GuiDirection::Vertical;
      m_dragActive = true;
      m_vBar->thumb()->setPressed(true);
      return true;
    } else if (m_hBar->thumb()->inMember(*mousePos)) {
      focus();
      m_dragOffset = *mousePos - screenPosition() - m_hBar->thumb()->position();
      m_dragDirection = GuiDirection::Horizontal;
      m_dragActive = true;
      m_hBar->thumb()->setPressed(true);
      return true;
    }
  }

  if (Widget::sendEvent(event))
    return true;

  if (auto mouseWheel = event.ptr<MouseWheelEvent>()) {
    if (mouseWheel->mouseWheel == MouseWheel::Up)
      scrollAreaBy({0, m_buttonAdvance * 3});
    else
      scrollAreaBy({0, -m_buttonAdvance * 3});
    return true;
  }

  return true;
}