Method handleMouseWheel

visage_app/window_event_handler.cpp:349–377

  }

  void WindowEventHandler::handleMouseWheel(float delta_x, float delta_y, float precise_x,
                                            float precise_y, int x, int y, int button_state,
                                            int modifiers, bool momentum) {
    MouseEvent mouse_event = mouseEvent(x, y, button_state, modifiers);
    mouse_event.wheel_delta_x = delta_x;
    mouse_event.wheel_delta_y = delta_y;
    mouse_event.precise_wheel_delta_x = precise_x;
    mouse_event.precise_wheel_delta_y = precise_y;
    mouse_event.wheel_momentum = momentum;

    mouse_hovered_frame_ = content_frame_->frameAtPoint(mouse_event.window_position);
    if (mouse_hovered_frame_) {
      temporary_frame_ = mouse_hovered_frame_;
      bool used = false;

      while (!used && temporary_frame_) {
        while (temporary_frame_ && temporary_frame_->ignoresMouseEvents())
          temporary_frame_ = temporary_frame_->parent();

        if (temporary_frame_) {
          mouse_event.position = mouse_event.window_position - temporary_frame_->positionInWindow();
          used = temporary_frame_->processMouseWheel(mouse_event);
          if (temporary_frame_)
            temporary_frame_ = temporary_frame_->parent();
        }
      }
    }
    temporary_frame_ = nullptr;
  }

  bool WindowEventHandler::isDragDropSource() {
    return mouse_down_frame_ != nullptr && mouse_down_frame_->isDragDropSource();