L_DocAddZone

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#include "ltdoc.h"

L_LTDOC_API L_INT L_DocAddZone(hDoc, nPageIndex, nZoneIndex, pZoneData)

L_HDOC hDoc;	/* handle to the OCR document */
L_INT nPageIndex;	/* page index */
L_INT nZoneIndex;	/* index of the zone to be added */
pZONEDATA pZoneData;	/* pointer to a ZONEDATA structure */

Adds a new zone to the zone list of the specified page.

Parameter	Description
hDoc	Handle to the OCR document.
nPageIndex	Index of the page on which to add the zone. This is a zero-based index.
nZoneIndex	Position in the list of zones at which to add new zone. Use -1 to append the page to the end of the list. This is a zero-based index.
pZoneData	Pointer to a ZONEDATA structure which contains the zone data to be added.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

Adds a new zone to the zone list of the specified page. After the zone is added, the zone list is recalculated automatically.

When adding a zone, the application should directly initialize the following members of the ZONEDATA structure, since these members will not take their default values:

uStructSize
rcArea
FillMethod
CharFilter
Type
RecogModule

The OCR engine manages the ID member of the ZONEDATA structure.

The Type member of the ZONEDATA structure should be one of the following values:

ZONE_FLOWTEXT

ZONE_TABLE

ZONE_GRAPHIC

For successful zone addition, the whole zone area must lie within the page area and the top left coordinates of the zone must have lower values than those of the bottom right ones.

To find all zones in a specific page, use L_DocFindZones.

Required DLLs and Libraries

LTDOC

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

See Also

Functions:	L_DocGetZoneCount, L_DocGetZone, L_DocUpdateZone, L_DocRemoveZone, L_DocImportZones, L_DocExportZones, L_DocFindZones, L_DocSetZoneOptions, L_DocGetZoneOptions
Topics:	OCR Functions: Zones
	Working with Zones

Example

L_INT EXT_CALLBACK VerificationCB(L_INT nZoneIndex,
                                  L_TCHAR* pszWord,
                                  VERIFYCODE* pVerify,
                                  L_VOID* pUserData)
{
   UNREFERENCED_PARAMETER(nZoneIndex);
   UNREFERENCED_PARAMETER(pszWord);
   UNREFERENCED_PARAMETER(pVerify);
   UNREFERENCED_PARAMETER(pUserData);

   //...
   //... Set your code here
   //...
   return SUCCESS;
}

 L_INT DocAddZoneExample(L_HDOC hDoc, L_INT nPageIndex)
{
   L_INT nRet;
   ZONEDATA ZoneData;
   L_INT nZoneCount = 0;
   L_TCHAR szBuffer[100];

   memset(szBuffer, 0, sizeof(szBuffer));
   memset(&ZoneData, 0, sizeof(ZONEDATA));

   ZoneData.uStructSize = sizeof(ZONEDATA);
   ZoneData.rcArea.left = 100;
   ZoneData.rcArea.top = 100;
   ZoneData.rcArea.right = 200;
   ZoneData.rcArea.bottom = 200;
   ZoneData.FillMethod = FILL_DEFAULT;
   ZoneData.RecogModule = RECOGMODULE_AUTO;
   ZoneData.CharFilter = ZONE_CHAR_FILTER_DEFAULT;
   ZoneData.Type = ZONE_FLOWTEXT;
   ZoneData.uFlags = 0;
   ZoneData.pfnCallback = VerificationCB;
   ZoneData.pUserData = NULL;

   nRet = L_DocAddZone(hDoc, nPageIndex, 0, &ZoneData);
   if (nRet == SUCCESS)
      MessageBox(NULL, TEXT("The specified zone is added."), TEXT("Notice!"), MB_OK);
   else
      return nRet;
   nRet = L_DocGetZoneCount (hDoc, nPageIndex, &nZoneCount);
   if (nRet != SUCCESS)
   {
      MessageBox(NULL, TEXT("An error occurred during L_DocGetZoneCount"), TEXT("Error!"), MB_OK);
      return nRet;
   }
   else
   {
      wsprintf(szBuffer, TEXT("Total zones in the specified page = %d\n"), nZoneCount);
      MessageBox(NULL, szBuffer, TEXT("Zone Count!"), MB_OK);
   }
   return SUCCESS;
}