#pragma once

#include <osgViewer/ViewerEventHandlers>
#include <osg/MatrixTransform>
#include "../XJOSGObject/XJOSGObject.h"

//对象高亮颜色
const osg::Vec4 HIGHTLIGHT_COLOR = osg::Vec4(0.8, 0.0, 0.0, 1.0);
const osg::Vec4 PICKPOINT_COLOR = osg::Vec4(0.0, 0.0, 1.0, 1.0);
																
// PickHandler，用于实现用户选择的GUIEventHandler 派生类。

//现在这个类是没用的
class CXJOSGPickHandler : public osgGA::GUIEventHandler
{
public:
	CXJOSGPickHandler();

	enum pickMode
	{
		PICK_OBJECT = 0,
		PICK_POINT = 1
	};

	bool handle( const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa );

	// 执行用户选择的操作。
	bool pick( const double x, const double y, osgViewer::Viewer* viewer );

	//设置选择对象的类型（点还是对象）
	void SetPickMode(int pickType) {m_pickType = pickType;}

	//获得选中对象上的点
	osg::Vec3 GetPickPoint(){return m_pickPoint;}

	//判断是否选中对象
	bool GetPickResult(){return m_pickResult;}

	//获得选中的显示对象
	CXJOSGObject * GetPickObject(){return m_pickObject;}

protected:
	// 保存鼠标按下和移动时的XY 坐标。
	float _mX,_mY;

	bool m_pickResult;
	osg::Vec3 m_pickPoint;
	CXJOSGObject* m_pickObject;

	int m_pickType;
};

/**键盘响应事件，用于处理键盘按下时触发的命令*/
class PromptionHandler : public osgGA::GUIEventHandler
{
public:
	PromptionHandler(osg::ApplicationUsage* au = 0);

	enum HUDCameraType
	{
		LEFT_UP = 0,
		RIGHT_UP = 1,
		LEFT_DOWN = 2
	};

	//用于存储提示信息的容器
	typedef std::vector<std::string> PromptionList;

	void setKeyEventTogglesOnScreenHelp(int key) { _keyEventTogglesOnScreenHelp = key; }
	int getKeyEventTogglesOnScreenHelp() const { return _keyEventTogglesOnScreenHelp; }

	void reset();

	bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa);

	void setHUDTextNode(osg::Node* node) {_HUDNode = node;}

protected:

	int                              _keyEventTogglesOnScreenHelp;
	bool                             _promptEnabled;
	bool                             _initialized;

	osg::Node*                        _HUDNode;
};