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Available in LEADTOOLS Medical Imaging toolkits. |
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Available in LEADTOOLS Medical Imaging toolkits. |
DISPCONTAINERTAGCALLBACK Callback Function
#include "ltivw.h"
L_INT pEXT_CALLBACK YourFunction(nCellIndex, hDC, lpRect, pUserData)
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L_INT nCellIndex; |
/* index of the cell that called the callback */ |
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HDC hDC; |
/* memory DC for painting */ |
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RECT * lpRect; |
/* pointer to a structure */ |
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L_VOID * pUserData; |
/* user data */ |
This callback function is called before the window control paints a cell that contains an owner draw tag.
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Parameter |
Description |
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nCellIndex |
Index of the cell, which has the owner draw tag. |
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hDC |
Memory DC that is used to paint the cell. |
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lpRect |
Pointer to a RECT structure that contains the area of the owner draw tag in the Memory DC. |
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pUserData |
A void pointer that you can use to access a variable or structure containing data that your callback function needs. This gives you a way to receive data indirectly from the function that uses this callback function. (This is the same pointer that you pass in the pUserData parameter of L_DispContainerSetTagCallBack.) Keep in mind that this is a void pointer, which must be cast to the appropriate data type within your callback function. |
Returns
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SUCCESS |
The function was successful. |
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< 1 |
An error occurred. Refer to Return Codes. |
Comments
When the window control paints a cell that contains an "owner draw" tag, this callback function is called to allow the user to draw a custom tag. This callback function is only called however, if it has been set by calling L_DispContainerSetTagCallback.
To get the current callback function used to draw custom tags, call L_DispContainerGetTagCallBack.
Required DLLs and Libraries
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LTIVW 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: |
L_DispContainerSetTagCallBack, L_DispContainerGetTagCallBack, L_DispContainerSetActionCallBack, L_DispContainerGetActionCallBack, DISPCONTAINERACTIONCALLBACK |
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Topics: |
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Example
For an example, refer to L_DispContainerCreate.
