LDicomIOD::GetPrev
#include "Ltdic.h"
static pDICOMIOD LDicomIOD::GetPrev(pIOD, bTree)
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pDICOMIOD pIOD; |
/* pointer to a DICOMIOD structure */ |
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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.
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Parameter |
Description |
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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. |
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bTree |
Flag that indicates how the IOD Structure will be evaluated. Possible values are: |
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Value |
Meaning |
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TRUE |
Evaluate the IOD Structure as a tree. |
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FALSE |
Evaluate the IOD Structure as a list. |
Returns
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!NULL |
A pointer to a DICOMIODstructure that contains the item in the IOD Structure that immediately precedes the item specified in pIOD. |
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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.
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If the passed pointer points to : |
The function returns a pointer to : |
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Item 1 |
Item 2 |
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Item 3 |
Item 4 |
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Item 5 |
NULL |
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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.
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If the passed pointer points to : |
The function returns a pointer to : |
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Item 1 |
NULL |
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Item 15 |
Item 14 |
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Item 5 |
Item 4 |
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Item 9 |
Item 8 |
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Item 22 |
Item 21 |
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Item 25 |
Item 24 |
The following functions will also help you navigate the IOD Structure as either a tree or a list:
If you evaluate the IOD Structure as a tree, you can also use the following functions to navigate the tree:
Required DLLs and Libraries
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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 |
See Also
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Functions: |
LDicomIOD::GetFirst, LDicomIOD::GetLast, LDicomIOD::GetNext, LDicomIOD::GetCountModule, LDicomIOD::GetRoot, LDicomIOD::GetParent, LDicomIOD::GetChild |
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Topics: |
Example
/* This example displays in a list-box control all classes from the IOD table */
L_VOID Test(CListBox *pDlg)
{
pDICOMIOD pIOD;
pIOD = LDicomIOD::GetLast(NULL, TRUE);
while (pIOD != NULL)
{
pDlg->AddString(pIOD->pszName);
pIOD = LDicomIOD::GetPrev(pIOD, TRUE);
}
}