L_AnnGetUserData
#include "l_bitmap.h"
L_LTANN_API L_INT L_AnnGetUserData(hObject, pUserData, puUserDataSize)
HANNOBJECT hObject; |
/* handle to the annotation object */ |
L_UCHAR *pUserData; |
/* address of binary data to write */ |
L_UINT *puUserDataSize; |
/* address of variable to updated with length of user data */ |
Gets the user-defined data of one or more annotation objects. This function is available in the Document/Medical Toolkits.
Parameter |
Description |
hObject |
Handle to the annotation object. |
pUserData |
Address that binary data is read into. Can be NULL. |
puUserDataSize |
Address of variable to be updated with the length (in bytes) of the user data |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
Use this function to get the associated user-defined data of an annotation object.
When getting the user-defined data, call this function twice: one time with pUserData set to NULL to get the length of the data, and another time to get the actual data.
HANNOBJECT hObject;
L_UCHAR *pUserData;
L_UINT uUserDataSize;
// Assume hObject is a valid annotation object
L_AnnGetUserData(hObject, NULL, &uUserDataSize);
pUserData = (L_UCHAR *)malloc(uUserDataSize);
L_AnnGetUserData(hObject, pUserData, &uUserDataSize);
User data can be binary or text data, and can be any length. When the annotion object is copied, and the user data is also copied. When saving the annotation (L_AnnSave, L_AnnSaveMemory, L_AnnSaveOffset), the user data is saved.
Required DLLs and Libraries
LTANN For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Platforms
Windows 2000 / XP/Vista.
See Also
Functions: |
L_AnnSetAutoCursor, L_AnnGetAutoCursor, L_AnnSetUserData, L_AnnSetAutoSnapCursor, L_AnnGetAutoSnapCursor |
Topics: |
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Example
This sample loads/saves the contents of a BITMAPHANDLE from/to user data of an annotation object Call the sample once with bSave set to TRUE, then call it again with bSave set to FALSE to load the saved user data as a BITMAPHANDLE hObject -- the annotation object pBitmap -- the bitmap that is loaded/saved bLoad -- TRUE means load from the annotation object, FALSE means save to the annotation object
L_INT AnnGetUserDataExample(HANNOBJECT hObject, pBITMAPHANDLE pBitmap, L_BOOL bSave) { L_INT nRet; HGLOBAL hGlobal = NULL; L_SIZE_T zUserDataSize; L_UCHAR* pUserData; if (!pBitmap || !hObject) return 0; if (bSave) // saving { nRet = L_SaveBitmapMemory(&hGlobal, pBitmap, FILE_BMP, 24, 0, &zUserDataSize, NULL); if(nRet != SUCCESS) return nRet; pUserData = (L_UCHAR *)GlobalLock(hGlobal); nRet = L_AnnSetUserData(hObject, pUserData, (L_UINT) zUserDataSize, ANNFLAG_NOINVALIDATE ); if(nRet != SUCCESS) return nRet; GlobalUnlock(hGlobal); GlobalFree(hGlobal); } else // loading { // Load nRet = L_AnnGetUserData(hObject, NULL, (L_UINT*) &zUserDataSize); if(nRet != SUCCESS) return nRet; pUserData = (L_UCHAR *)malloc(zUserDataSize); nRet = L_AnnGetUserData(hObject, pUserData, (L_UINT*) &zUserDataSize); if(nRet != SUCCESS) return nRet; nRet = L_LoadBitmapMemory(pUserData, pBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGRORGRAY, zUserDataSize, NULL, NULL); if(nRet != SUCCESS) return nRet; free(pUserData); } return SUCCESS; }