guiscroll.h

HGE 2D游戏引擎制作的一个演示

#pragma once
#include "GUI.h"
#include "GUIButton.h"


#define SCROLL_CMD_BTN_MIN	0x1
#define SCROLL_CMD_BTN_MAX	0x2
#define SCROLL_CMD_BTN_MOVE	0x3

#define SCROLL_BTN_WIDTH	16
#define SCROLL_BTN_HEIGHT	16

enum SCROLLTYPE
{
	SCROLLTYPE_COL = 0,		//纵向滚动
	SCROLLTYPE_ROW = 1		//横向滚动
};

class GUIScroll :
	public GUI
{
public:
	GUIScroll(void);
	~GUIScroll(void);

public:
	enum
	{
		SCROLLBACK_COL		= 0,
		SCROLLBACK_ROW		= 1
	};
	enum
	{
		SCROLL_MINBUTTON	= 0,
		SCROLL_MAXBUTTON	= 1,
		SCROLL_MOVEBUTTON	= 2,
		SCROLL_MOVEBACK		= 3
	};
	static const int SCROLLBACK_COUNT = 4;
	static char SCROLLRESNAME[SCROLLBACK_COUNT][MAX_RESNAME];
	static void	SETRESOURCE(char* min,char* max,char* move,char* back);

protected:
	GUIButton*			m_pBtnMin;
	GUI*			m_pScrollBack;
	GUIButton*			m_pBtnMax;
	GUIButton*			m_pBtnMove;

protected:
	BYTE		m_ScrollType;				//SCROLLTYPE_COL或者SCROLLTYPE_ROW
	float		m_Range;					//滚动范围
	float		m_PageRange;				//单页范围
	float		m_LineRange;				//单步范围
	float		m_CurPos;					//当前位置

	bool		m_bMoveBar;					//是否开始使用拖动滚动条
	GUIPoint	m_ptMoveBarOff;				//鼠标与滚动条的偏移

	GUISize		m_BtnSize;					//默认按钮大小

public:
	bool CreateGUIScroll(char* lpszName,BYTE type,float size,float range,float pagerange,float linerange,float btnwidth,float btnheight,GUI* pParent);
	void SetGUIScrollSize(float size);
	void ScrollMin();
	void ScrollMax();

	float GetRange();
	float GetPageRange();
	float GetLineRange();
	float GetCurPos();

	void SetRange(float range);
	void SetPageRange(float pagerange);
	void SetLineRange(float linerange);
	void SetCurPos(float curpos);

	void UpdataScroll();														///根据当前位置更新滑动条的位置

public:
	virtual void Updata(float dt);												///立即更新
	virtual void OnChildMessage(GUI* pChildGUI,UINT iMsg, WPARAM wParam, LPARAM lParam);///子对象发送了命令请求
	virtual int OnMouseLButton(float x,float y,bool down);						///左键按下松开(在区域内)
};