L_DocSetPaintZoomFactor

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#include "ltdoc.h"

L_LTDOC_API L_INT L_DocSetPaintZoomFactor (hDoc, nPageIndex, fZoomFactor)

L_HDOC hDoc;	/* handle to the OCR document. */
L_INT nPageIndex;	/* page index */
L_FLOAT fZoomFactor;	/* zoom factor */

Sets the zoom factor used to draw the specified OCR page.

Parameter	Description
hDoc	Handle to the OCR document.
nPageIndex	Specifies the index of the page for which to set the zoom factor. This index is zero-based.
fZoomFactor	Specifies the zoom factor used when drawing the specified OCR page. A value of 100 represents normal display; a value of 200 represents a 2X display; a value of 50 represents a 1/2X display; etc.

Returns

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

Comments

The page specified in the nPageIndex may or may not have zones. If the page has zones, the zones will be drawn using the zoom factor too.

To draw the specified page, using the specified zoom factor, call L_DocDrawPage.

To get the zoom factor of a specific page, call L_DocGetPaintZoomFactor.

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_DocGetPaintZoomFactor, L_DocRecognize, L_DocDrawPage, L_DocLockPage, L_DocUnlockPage, L_DocSetActivePage, L_DocSelectZoneByPoint, L_DocSelectZone, L_DocRemoveSelectedZone, L_DocSetZonePen, L_DocSetSelectedZonePen, L_DocGetSelectedZone, L_DocZone
Topics:	Drawing Pages and Zones
	OCR Functions: Drawing Zones and Pages

Example

 L_INT DocSetPaintZoomFactorExample(L_HDOC hDoc,HWND hWnd)
{
   L_INT nRet;
   HDC hdc = NULL;
   PAGEINFO PageInfo;
   RECT rcDst;
   L_FLOAT fZoom;

   ZeroMemory(&PageInfo, sizeof(PAGEINFO));
   hdc = GetDC(hWnd);

   nRet = L_DocSetActivePage(hDoc, 0);
   if(nRet != SUCCESS)
      return nRet;

   nRet = L_DocGetPaintZoomFactor(hDoc, 0, &fZoom);
   if(nRet != SUCCESS)
      return nRet;
   if (fZoom != 100.0)
   {
      nRet = L_DocSetPaintZoomFactor(hDoc, 0, 100);
      if(nRet != SUCCESS)
         return nRet;
   }

   nRet = L_DocGetPageInfo (hDoc, 0, &PageInfo, sizeof(PAGEINFO));
   if(nRet != SUCCESS)
      return nRet;
   SetRect(&rcDst, 0, 0, PageInfo.nWidth, PageInfo.nHeight);

   nRet = L_DocDrawPage(hDoc, hdc, 0, NULL, NULL, &rcDst, NULL, SRCCOPY, TRUE);
   if(nRet != SUCCESS)
      return nRet;
   ReleaseDC(hWnd, hdc);
   return SUCCESS;
}