LDicomIOD::GetFirst

#include "Ltdic.h"

static pDICOMIOD LDicomIOD::GetFirst(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 first item in the IOD Structure.

Parameter	Description
pIOD	Pointer to a DICOMIOD structure within the IOD Structure. A pointer to the DICOMIOD structure that contains the first item in the IOD Structure 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 DICOMIOD structure that contains the first item in the IOD Structure.
NULL	The IOD Structure is empty.

Comments

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

$image\GetFstTr.gif$

If the passed pointer points to :	The function returns a pointer to :
Item 1	Item 2
Item 3	Item 4
Item 5	Item 5
Item 6	Item 7
NULL	Item 2

If the IOD Structure is evaluated as a list, the first 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.

$image\GetFtLst.gif$

If the passed pointer points to :	The function returns a pointer to :
NULL	Item 1
Item 12	Item 1
Item 14	Item 1
Item 22	Item 1
Item 25	Item 1

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

LDicomIOD::GetLast

LDicomIOD::GetPrev

LDicomIOD::GetNext

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

LDicomIOD::GetRoot

LDicomIOD::GetParent

LDicomIOD::GetChild

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

See Also

Functions:	LDicomIOD::GetLast, LDicomIOD::GetPrev, LDicomIOD::GetNext, LDicomIOD::GetCountModule, LDicomIOD::GetRoot, LDicomIOD::GetParent, LDicomIOD::GetChild
Topics:	Working with Information Object Definitions
	How to Disable the Automatic Loading of the default DICOM IOD Table

Example

This example displays in a tree control the list of the IOD table.

L_VOID ShowList(CTreeCtrl *pDlg)
{
   HTREEITEM hItem;
   pDICOMIOD pIOD;
   pIOD = LDicomIOD::GetFirst(NULL, FALSE);
   while (pIOD != NULL)
   {
      hItem = pDlg->InsertItem(pIOD->pszName, TVI_ROOT, TVI_LAST);
      pIOD = LDicomIOD::GetNext(pIOD, FALSE);
   }
}
L_INT LDicomIOD_GetFirstExample(CTreeCtrl *pDlg)
{
   ShowList(pDlg);
   return DICOM_SUCCESS;
}