L_DicomGetPrevIOD

#include "Ltdic.h"

L_LTDIC_API pDICOMIOD L_DicomGetPrevIOD(pIOD, bTree)

pDICOMIOD pIOD;

pointer to a DICOMIOD structure

L_BOOL bTree;

flag that indicates how to evaluate the IOD Structure

Returns a pointer to the item in the IOD Structure that immediately precedes the specified item.

Parameter Description
pIOD Pointer to a DICOMIODstructure that contains an item in the IOD Structure. A pointer to the item in the IOD Structure that immediately precedes this item will be returned.
bTree Flag that indicates how the IOD Structure will be evaluated. Possible values are:
  Value Meaning
  TRUE Evaluate the IOD Structure as a tree.
  FALSE Evaluate the IOD Structure as a list.

Returns

!NULL

A pointer to a DICOMIODstructure that contains the item in the IOD Structure that immediately precedes the item specified in pIOD.

NULL

There is not an item preceding pIOD. (pIOD is the first item in the IOD Structure.)

Comments

If the IOD Structure is evaluated as a tree structure, this function returns the previous item on the same level as pIOD with the same parent as pIOD. Please note that the numbering of the items in this illustration is arbitrary and does not imply order.

image\GetPvTr.gif

If the passed pointer points to :

The function returns a pointer to :

Item 1

Item 2

Item 3

Item 4

Item 5

NULL

Item 6

Item 7

If the IOD Structure is evaluated as a list, the previous item in the list is returned. Please note that the numbering of the items in this illustration does indicate the order of the items when the IOD Structure is evaluated as a list.

image\GetPvLst.gif

If the passed pointer points to :

The function returns a pointer to :

Item 1

NULL

Item 15

Item 14

Item 5

Item 4

Item 9

Item 8

Item 22

Item 21

Item 25

Item 24

The following functions will also help you navigate the IOD Structure as either a tree or a list:

L_DicomGetFirstIOD

L_DicomGetLastIOD

L_DicomGetNextIOD

If you evaluate the IOD Structure as a tree, you can also use the following functions to navigate the tree:

L_DicomGetRootIOD

L_DicomGetParentIOD

L_DicomGetChildIOD

Required DLLs and Libraries

LTDIC

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

Win32, x64, Linux.

See Also

Functions:

L_DicomGetFirstIOD, L_DicomGetLastIOD, L_DicomGetNextIOD, L_DicomGetCountModuleIOD, L_DicomGetRootIOD, L_DicomGetParentIOD, L_DicomGetChildIOD

Topics:

Working with Information Object Definitions

 

How to Disable the Automatic Loading of the default DICOM IOD Table

Example

This example displays in a list-box control all classes from the IOD table

L_LTDICTEX_API L_INT DicomGetPrevIODExample(HWND hDlg) 
{ 
   pDICOMIOD pIOD; 
   pIOD = L_DicomGetLastIOD(NULL, TRUE); 
   while (pIOD != NULL) 
   { 
      SendMessage(hDlg, LB_ADDSTRING, (WPARAM)0, (LPARAM)(LPCTSTR)pIOD->pszName); 
      pIOD = L_DicomGetPrevIOD(pIOD, TRUE); 
   } 
   return DICOM_SUCCESS; 
} 

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