LDicomIOD::Delete

#include "Ltdic.h"

static pDICOMIOD LDicomIOD::Delete(pIOD)

Deletes the specified item from the IOD Structure.

Returns

Comments

You can remove all items from the IOD Structure using LDicomIOD::Reset.

Since the IOD Structure is stored internally as a tree, the deletion must be carried out as a tree.

When deleting an item from the tree, if the item being deleted has a sibling (same level, same parent), following it, this function returns a pointer to this sibling. If the item being deleted does not have a sibling following it, but has a sibling preceding it, this function returns a pointer to the preceding sibling. If the item being deleted is an only child, this function returns a pointer to the parent. If there is no parent this function returns NULL.

Below are illustrations of these situations:

For the sake of these illustrations, the order of siblings is top to bottom. A preceding sibling is drawn above the sibling it precedes, a following sibling is drawn below the sibling it follows.

Please note that the numbering of the items of interest is arbitrary, and does not imply order.

In this illustration item 2 will be deleted. Since it has a following sibling, the returned pointer will point to item 3.

In this illustration item 3 will be deleted. Since it does not have a following sibling, but does have a preceding sibling, the returned pointer will point to item 2.

In this illustration item 2 will be deleted. Since it is an only child, the returned pointer will point to the parent, item 1.

In this illustration item 1 will be deleted. Since it has no siblings and no parent, this function will return NULL.

Required DLLs and Libraries

Platforms

Win32, x64

// This example removes a class from the IOD table. 
L_INT LDicomIOD_DeleteExample_1() 
{ 
   pDICOMIOD pClass; 
   pClass = LDicomIOD::FindClass( CLASS_CT_IMAGE_STORAGE); 
   if (pClass != NULL) 
   { 
      LDicomIOD::Delete(pClass); 
   } 
   return DICOM_SUCCESS; 
} 
/* This example removes a module from the IOD table */ 
L_INT LDicomIOD_DeleteExample_2() 
{ 
   pDICOMIOD pModule; 
   pModule = LDicomIOD::FindModule( CLASS_US_IMAGE_STORAGE, MODULE_GENERAL_STUDY); 
   if (pModule != NULL) 
   { 
      LDicomIOD::Delete(pModule); 
   } 
   return DICOM_SUCCESS; 
} 
/* This example removes an element from the IOD table */ 
L_INT LDicomIOD_DeleteExample_3() 
{ 
   pDICOMIOD pModule; 
   pDICOMIOD pElement; 
   pModule = LDicomIOD::FindModule( CLASS_NM_IMAGE_STORAGE, MODULE_PATIENT_STUDY); 
   if (pModule != NULL) 
   { 
      pElement = LDicomIOD::GetChild(pModule); 
      if (pElement != NULL) 
      { 
         LDicomIOD::Delete(pElement); 
      } 
   } 
   return DICOM_SUCCESS; 
}