EVC写的程序（转）

最新推荐文章于 2025-07-20 09:07:34 发布

原创最新推荐文章于 2025-07-20 09:07:34 发布 · 135 阅读

0 ·

CC 4.0 BY-SA版权

本文介绍了一个使用Windows API实现的条形码扫描程序。该程序通过对话框接收用户输入，并利用SCAN_API进行条码扫描。文章详细展示了如何处理条码数据、保存扫描结果到文件以及文本框的子类化等过程。

#include "stdafx.h"

#include "resource.h"

#include <windows.h>

#include <windowsx.h>

#include <ScanCAPI.h>

#include <stdio.h>

#include <string.h>

#include <wchar.h>

#define countof(x) sizeof(x)/sizeof(x[0])

BOOL CALLBACK MAINProc(HWND,UINT,WPARAM,LPARAM);

LRESULT CALLBACK EditProc(HWND,UINT,WPARAM,LPARAM);

BOOL Save(HWND hwnd_barcode,HWND hwnd_qty);

void InitFormControl(HWND);

WNDPROC PreEditProc[2];

HINSTANCE hInst = NULL;

HANDLE hScanner = NULL;

LPSCAN_BUFFER lpScanBuffer = NULL;

TCHAR szScannerName[MAX_PATH] = TEXT("SCN1:"); // default scanner name

DWORD dwScanSize = 7095; // default scan buffer size

DWORD dwScanTimeout = 0; // default timeout value (0 means no timeout)

BOOL bUseText = TRUE;

BOOL bTriggerFlag = FALSE;

BOOL bRequestPending = FALSE;

BOOL bStopScanning = FALSE;

enum tagUSERMSGS

{

UM_SCAN = WM_USER + 0x200,

UM_STARTSCANNING,

UM_STOPSCANNING

};

int WINAPI WinMain( HINSTANCE hInstance,

HINSTANCE hPrevInstance,

LPTSTR lpCmdLine,

int nCmdShow)

{

int nResult;

hInst = hInstance;

nResult = DialogBoxParamW(hInstance, MAKEINTRESOURCE(IDD_MAIN), NULL, MAINProc,0L);

return nResult;

}

BOOL CALLBACK MAINProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)

{

DWORD dwResult;

LPSCAN_BUFFER lpScanBuf;

static HWND hctl_temp,hctl_barcode, hctl_qty, hctl_status,hctl_info;

switch(uMsg)

{

case WM_INITDIALOG:

PostMessage(hwnd,UM_STARTSCANNING,0,0L);

hctl_barcode=GetDlgItem(hwnd,IDC_EDIT_Barcode);

hctl_qty=GetDlgItem(hwnd,IDC_EDIT_Qty);

hctl_status=GetDlgItem(hwnd,IDC_STATIC_STATUS);

hctl_info=GetDlgItem(hwnd,IDC_STATIC_INFO);

InitFormControl(hwnd);

//子类化

PreEditProc[0]=(WNDPROC) SetWindowLong (hctl_barcode,

GWL_WNDPROC, (LONG) EditProc) ;

PreEditProc[1]=(WNDPROC) SetWindowLong (hctl_qty,

GWL_WNDPROC, (LONG) EditProc) ;

break;

case UM_STARTSCANNING:

dwResult=SCAN_Open(szScannerName,&hScanner);

if(dwResult!=E_SCN_SUCCESS)

{

MessageBox(hwnd,TEXT("不能打开激光器"),TEXT("提示"),MB_OK);

SendMessage(hwnd,UM_STOPSCANNING,0,0L);

break;

}

dwResult=SCAN_Enable(hScanner);

if(dwResult!=E_SCN_SUCCESS)

{

MessageBox(hwnd,TEXT("激光器不可用"),TEXT("提示"),MB_OK);

SendMessage(hwnd,UM_STOPSCANNING,0,0L);

break;

}

lpScanBuffer = SCAN_AllocateBuffer(bUseText, dwScanSize);

if (lpScanBuffer==NULL)

{

MessageBox(hwnd,TEXT("未能分配扫描缓冲"),TEXT("提示"),MB_OK);

SendMessage(hwnd,UM_STOPSCANNING,0,0L);

return TRUE;

}

//SCAN_ReadLabelMsg扫描成功后向hwnd发送UM_SCAN的消息

dwResult=SCAN_ReadLabelMsg(hScanner,

lpScanBuffer,

hwnd,

UM_SCAN,

dwScanTimeout,

NULL);

if(dwResult!=E_SCN_SUCCESS)

{

MessageBox(hwnd,TEXT("SCAN_ReadLabelMsg发生错误"),TEXT("提示"),MB_OK);

SendMessage(hwnd,UM_STOPSCANNING,0,0L);

}

else

{

//只有到最后成功得到缓存后才置此标志为TRUE

bRequestPending=TRUE;

}

break;

return true;

case UM_STOPSCANNING:

//在未停止扫描且未已正常得到缓存后才执行SCAN_Flush

if (!bStopScanning && bRequestPending)

{

SCAN_Flush(hScanner);

}

if (!bRequestPending)

{

SCAN_Disable(hScanner);

if (lpScanBuffer)

SCAN_DeallocateBuffer(lpScanBuffer);

SCAN_Close(hScanner);

EndDialog(hwnd, 0);

}

bStopScanning = TRUE;

break;

case WM_ACTIVATE:

switch(LOWORD(wParam))

{

case WA_INACTIVE:

if (bRequestPending)

{

dwResult=SCAN_Flush(hScanner);

}

break;

default:

if (!bRequestPending && lpScanBuffer != NULL && !bStopScanning)

{

dwResult=SCAN_ReadLabelMsg(hScanner,

lpScanBuffer,

hwnd,

UM_SCAN,

dwScanTimeout,

NULL);

if (dwResult!=E_SCN_SUCCESS)

{

MessageBox(hwnd,TEXT("SCAN_ReadLabelMsg发生错误"),TEXT("提示"),MB_OK);

SendMessage(hwnd,UM_STOPSCANNING,0,0L);

}

break;

}

break;

case UM_SCAN:

bRequestPending=FALSE;

lpScanBuf=(LPSCAN_BUFFER)lParam;

if(lpScanBuf==NULL)

{

MessageBox(hwnd,TEXT("未能正确得到数据"),TEXT("提示"),MB_OK);

SendMessage(hwnd,UM_STOPSCANNING,0,0L);

}

switch(SCNBUF_GETSTAT(lpScanBuf))

{

case E_SCN_SUCCESS:

hctl_temp=GetFocus();

if(hctl_temp==hctl_barcode ||hctl_temp==hctl_qty)

{

Edit_SetText(hctl_temp,(LPTSTR)SCNBUF_GETDATA(lpScanBuffer));

}

else

{

Edit_SetText(hctl_barcode,(LPTSTR)SCNBUF_GETDATA(lpScanBuffer));

SendMessage(hwnd,WM_KEYDOWN,VK_RETURN,NULL);

}

break;

}

if (GetFocus())

{

dwResult = SCAN_ReadLabelMsg(hScanner,

lpScanBuffer,

hwnd,

uMsg,

dwScanTimeout,

NULL);

if ( dwResult != E_SCN_SUCCESS )

{

MessageBox(hwnd,TEXT("SCAN_ReadLabelMsg未能正确得到数据"),TEXT("提示"),MB_OK);

SendMessage(hwnd,UM_STOPSCANNING,0,0L);

}

else

bRequestPending = TRUE;

}

return TRUE;

case WM_COMMAND:

switch (LOWORD(wParam))

{

case IDCANCEL:

bRequestPending=TRUE;

SendMessage(hwnd,UM_STOPSCANNING,0,0L);

bRequestPending=FALSE;

SendMessage(hwnd,UM_STOPSCANNING,0,0L);

break;

}

return TRUE;

case WM_KEYDOWN:

switch (wParam)

{

case VK_RETURN:

hctl_temp=GetFocus();

if (hctl_temp==hctl_barcode)

{

SetFocus(hctl_qty);

SendMessage(hctl_qty,EM_SETSEL,0,-1);

}

else if (hctl_temp==hctl_qty)

{

if (Save(hctl_barcode,hctl_qty)==TRUE)

{

SetWindowText(hctl_info,TEXT("追加数据成功!"));

InitFormControl(hwnd);

}

else

{

SetWindowText(hctl_info,TEXT("追加数据失败!"));

}

else

{

SetFocus(hctl_barcode);

}

break;

case VK_F1:

InitFormControl(hwnd);

break;

case VK_F2:

hctl_temp=GetFocus();

if (hctl_temp==hctl_qty)

{

Edit_SetText(hctl_temp,TEXT("-"));

Edit_SetSel(hctl_temp,1,1);

}

break;

case VK_F3:

break;

}

break;

}

return FALSE;

}

//初始化

void InitFormControl(HWND hwnd)

{

HWND hctl_barcode, hctl_qty;

hctl_barcode=GetDlgItem(hwnd,IDC_EDIT_Barcode);

Edit_SetText(hctl_barcode,TEXT(""));

hctl_qty=GetDlgItem(hwnd,IDC_EDIT_Qty);

Edit_SetText(hctl_qty,TEXT("1"));

SetFocus(hctl_barcode);

}

//子类化文本框

LRESULT CALLBACK EditProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)

{

int id = GetWindowLong (hwnd, GWL_ID) ;

LPMSG msg;

WNDPROC proc;

switch (uMsg)

{

case WM_GETDLGCODE :

msg=(LPMSG) lParam;

switch(msg->message)

{

case WM_KEYDOWN:

switch(msg->wParam)

{

case VK_TAB:

case VK_RETURN:

case VK_F1:

case VK_F2:

case VK_F3:

SendMessage(GetParent(hwnd),msg->message,msg->wParam,msg->lParam);

break;

}

/**//*

switch(msg->message)

{

case EN_SETFOCUS:

hctl_qty=GetDlgItem(GetParent(hwnd),IDC_EDIT_Qty);

if (msg->hwnd==hctl_qty)

{

SetDlgItemInt(GetParent(hwnd),IDC_STATIC_STATUS,msg->message,FALSE);

//Edit_SetSel(hwnd,-1,GetWindowTextLength(hwnd));

Edit_SetSel(hwnd,0,-1);

//SNDMSG(hwnd, EM_SETSEL, 0, GetWindowTextLength(hwnd));

}

if (id==IDC_EDIT_Barcode)

{

proc=PreEditProc[0];

}

else if (id==IDC_EDIT_Qty)

{

proc=PreEditProc[1];

}

return CallWindowProc (proc, hwnd, uMsg, wParam, lParam) ;

}

//保存

BOOL Save(HWND hwnd_barcode,HWND hwnd_qty)

{

int result=FALSE;

FILE * file_handling=NULL;

TCHAR barcode[255],qty[255];

TCHAR buffer[255];

char ansiBuffer[255];

GetWindowText(hwnd_barcode,buffer,sizeof(buffer));

if (!lstrlen (buffer))

{

MessageBox(NULL,TEXT("请扫描或输入条码!"),TEXT("提示"),MB_OK);

SetFocus(hwnd_barcode);

return result;

}

else

{

lstrcpy (barcode,buffer);

}

memset(buffer,0,sizeof(buffer));

GetWindowText(hwnd_qty,buffer,sizeof(buffer));

if (!lstrlen (buffer))

{

MessageBox(NULL,TEXT("请输入数量!"),TEXT("提示"),MB_OK);

SetFocus(hwnd_qty);

return result;

}

else //判断数字

{

}

lstrcpy (qty,buffer);

memset(buffer,0,sizeof(buffer));

swprintf(buffer,TEXT("%s,%s\n"),barcode,qty);

if (file_handling=fopen("\\bar.txt","a+"))

{

#ifdef UNICODE

//将Unicode转换为ANSI

wcstombs(ansiBuffer,buffer,sizeof(ansiBuffer));

result=fwrite(ansiBuffer,sizeof(char),strlen(ansiBuffer),file_handling);

#else

result=fwrite(buffer,sizeof(TCHAR),lstrlen(buffer),file_handling);

#endif

fclose(file_handling);

}

else

{

MessageBox(NULL,TEXT("打开文件失败!"),TEXT("提示"),MB_OK);

}

return result==0?FALSE:TRUE;

}