L_AnnChangeUserHandle

#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnChangeUserHandle(hObject, nIndex, pAnnHandle)

HANNOBJECT hObject;	/* handle to the annotation object */
L_INT32 nIndex;	/* index of the user handle to change */
pANNHANDLE pAnnHandle;	/* pointer to a structure that defines how to change the user handle */

Changes properties of an existing user-defined annotation handle.

Parameter	Description
hObject	Handle to the annotation object for which to change the user handle.
nIndex	Index of the user handle to change. This index is zero-based.
pAnnHandle	Pointer to a structure that defines how to change the user handle.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

Use this function to change the properties of an existing user-defined annotation handle.

This function is used in conjunction with the L_AnnAddUserHandle and L_AnnEnumerateHandles and L_AnnChangeUserHandle functions.

Required DLLs and Libraries

LTANN

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:	L_AnnDefine, L_AnnAddUserHandle, L_AnnAdjustPoint, L_AnnConvert, L_AnnDefine2, L_AnnDeleteUserHandle, L_AnnEnumerateHandles, L_AnnGetRestrictToContainer, L_AnnGetRotateAngle, L_AnnGetUserHandle, L_AnnGetUserHandles, L_AnnHitTest, L_AnnRestrictCursor, L_AnnSetRestrictToContainer
Topics:	Annotation Functions: Creating and Deleting Annotations
	Implementing Custom Annotations
	Implementing Annotations
	Implementing an Automated Annotation Program
	Implementing a Non-automated Annotation Program

Example

This example changes the first user handle of an object by * Moving the handle ten pixels to the left * Changing the color of the handle to blue * Changing the shape of handle to square * Setting the handle to display the hour glass cursor when the mouse hovers over the handle

 L_INT AnnChangeUserHandleExample(HANNOBJECT hObject)
{
   L_INT nRet;
   L_UINT      uCount;
   ANNHANDLE   AnnHandle;

   // Get the total count of user handles
   nRet = L_AnnGetUserHandles(hObject, NULL, &uCount);
   if(nRet != SUCCESS)
      return nRet;
   if (uCount > 0)
   {
      memset(&AnnHandle, 0, sizeof(ANNHANDLE));
      AnnHandle.uStructSize = sizeof(&AnnHandle);
      nRet = L_AnnGetUserHandle(hObject, 0, &AnnHandle);
      if(nRet != SUCCESS)
         return nRet;

      AnnHandle.aptContainer.x +=10;
      AnnHandle.crFill = RGB(0,0,255);
      AnnHandle.nShape = ANNHANDLE_SHAPE_SQUARE;
      AnnHandle.hCursor = LoadCursor(NULL,IDC_APPSTARTING);
      AnnHandle.uFlags = ANNHANDLE_FILL_COLOR | ANNHANDLE_SHAPE | ANNHANDLE_LOCATION | ANNHANDLE_CONTAINER_COORDINATES;

     
      nRet = L_AnnChangeUserHandle(hObject, 0, &AnnHandle);
      if(nRet != SUCCESS)
         return nRet;
   }
   else
   {
      MessageBox(NULL, TEXT("No User Handles!"), TEXT("Error"), MB_OK);
      return 0;
   }
   return SUCCESS;
}