code_app/modules/twain_user/HGTwainImpl.hpp

#ifndef __HGTWAINIMPL_HPP__
#define __HGTWAINIMPL_HPP__

#include "HGTwain.h"
#include "../base/HGDll.h"
#include "../base/HGEvent.h"
#include "../base/HGThread.h"
#include "twain/twain.h"
#include "../twainui/twainui.h"
#include <vector>
#include <map>

class HGTwainDSMImpl
{
    friend class HGTwainDSImpl;
public:
	HGTwainDSMImpl();
	~HGTwainDSMImpl();

	HGResult Create(HWND hwnd);
	HGResult Destroy();
	HGResult GetDSCount(HGUInt* count);
	HGResult GetDSName(HGUInt index, HGChar* name, HGUInt maxLen);
    HGResult CreateDS(HGUInt index, class HGTwainDSImpl** dsImpl);
    HGResult CreateDefaultDS(class HGTwainDSImpl** dsImpl);
    HGResult CreateSelectedDS(class HGTwainDSImpl** dsImpl);
    HGResult CreateSelectedDSEx(class HGTwainDSImpl** dsImpl);

private:
	void RemoveDS(class HGTwainDSImpl* dsImpl);
	static LRESULT CALLBACK NewWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
    bool filterTwainSource(const char* sourceName, int majorNum);

private:
	HGDll m_hDll;
	DSMENTRYPROC m_pDSMProc;
	TW_IDENTITY m_AppId;
	HWND m_hWnd;
	static std::map<HWND, HGTwainDSMImpl*> m_mapWnd;
	WNDPROC m_oldWndProc;
    std::vector<TW_IDENTITY> m_vds;
	std::vector<class HGTwainDSImpl *> m_listDSImpl;
};

class HGTwainDSImpl
{
	friend class HGTwainDSMImpl;
public:
    HGTwainDSImpl(HGTwainDSMImpl* dsmImpl, TW_IDENTITY* iden);
	~HGTwainDSImpl();

public:
    HGResult Destroy();
    HGResult Open();
	HGResult Close();
	HGResult GetName(HGChar* name, HGUInt maxLen);
    HGResult GetDeviceName(HGChar* name, HGUInt maxLen);

    HGResult GetDeviceCustomInfo(HGTwainDeviceCustomInfo *info);
    HGResult Login(const HGChar *user, const HGChar *pwd);
    HGResult Logout();
    HGResult ClearRollerCount();
    HGResult GetDriverLog(const HGChar *fileName);
    HGResult ClearDriverLog();
    HGResult GetDeviceLog(const HGChar *fileName);
    HGResult ClearDeviceLog();

    HGResult EnableUIOnly(HWND parent, HGDSEventFunc eventFunc, HGPointer eventParam);
    HGResult Enable(HGBool showUI, HWND parent, HGDSEventFunc eventFunc, HGPointer eventParam,
		HGDSImageFunc imageFunc, HGPointer imageParam);
    HGResult EnableWithSingleScan(HWND parent, HGDSEventFunc eventFunc, HGPointer eventParam,
        HGDSImageFunc imageFunc, HGPointer imageParam);
	HGResult Disable();

	HGResult SetCapbility(HGUShort cap, const HGCapValue* value, HGBool reset);
	HGResult GetCapbility(HGUShort cap, HGCapValue* value);

private:
	HGResult ImageNativeXfer(HGUInt type, HGUInt origin, HGImage* image);
	HGResult EndXfer(HGUInt* count);
	HGResult Reset();

    TW_FIX32 FloatToFIX32(float i_float);
    float FIX32ToFloat(TW_FIX32 FIX32Value);

    static void HGAPI ThreadFunc(HGThread thread, HGPointer param);

private:
	HGTwainDSMImpl* m_dsmImpl;
	TW_IDENTITY m_iden;
	HGBool m_open;
    HGBool m_singleScan;
    HGInt m_oldXferCount;
	HGBool m_showUI;
	HWND m_parent;
    HGDSEventFunc m_eventFunc;
	HGPointer m_eventParam;
	HGDSImageFunc m_imageFunc;
	HGPointer m_imageParam;
    HGEvent m_event;
    volatile HGBool m_stopThread;
    HGThread m_thread;
};

#endif /* __HGTWAINIMPL_HPP__ */