osgGA.GUIActionAdapter

简介

osgGA.GUIActionAdapter是一个输入事件的处理器。该类主要用于处理GUI没有处理的输入事件，以及提供一个与GUI交互的接口。

类定义

class OSGGA_EXPORT GUIActionAdapter : public ActionAdapter
{
    public:

        GUIActionAdapter() : ActionAdapter() {}

        GUIActionAdapter(const GUIActionAdapter& ga, const CopyOp& copyop=CopyOp::SHALLOW_COPY) : ActionAdapter(ga,copyop) {}

        META_Object(osgGA,GUIActionAdapter)

        /** get the GUIEventType of this action. */
        virtual GUIEventType getEventType() const { return GUIEventAdapter::NO_EVENT; }

        /** Get the GUIEventAdapter pointer for this action.
          * Returns NULL if there is no gui event associated with this action.
          * Note, the event adapter will only exist for a short period of time, so if
          * you want to keep hold of it, then clone it or copy it's data over
          * to a local copy. */
        virtual GUIEventAdapter* getEventAdapter() { return 0; }

        /** Get the GUIEventAdapter pointer (const version) for this action.
          * Returns NULL if there is no gui event associated with this action.
          * Note, the event adapter will only exist for a short period of time, so if
          * you want to keep hold of it, then clone it or copy it's data over
          * to a local copy. */
        virtual const GUIEventAdapter* getEventAdapter() const { return 0; }

};

函数成员

构造函数

GUIActionAdapter() : ActionAdapter() {}

该构造函数创建一个空的GUIActionAdapter对象。

GUIActionAdapter(const GUIActionAdapter& ga, const CopyOp& copyop=CopyOp::SHALLOW_COPY) : ActionAdapter(ga,copyop) {}

该构造函数复制一个已存在的GUIActionAdapter对象。

函数

virtual GUIEventType getEventType() const { return GUIEventAdapter::NO_EVENT; }

获取该GUIActionAdapter对象中的GUIEventType类型。

virtual GUIEventAdapter* getEventAdapter() { return 0; }

获取该GUIActionAdapter对象中的GUIEventAdapter指针，如果没有与该动作相关联的GUI事件，则返回空指针。

virtual const GUIEventAdapter* getEventAdapter() const { return 0; }

获取该GUIActionAdapter对象中的GUIEventAdapter指针(const版本)，如果没有与该动作相关联的GUI事件，则返回空指针。

参考资料

• OpenSceneGraph 3.6.5 Documentation: osgGA::GUIActionAdapter Class Reference