#include "ltwrappr.h"
virtual L_INT LAnnFreehand::ChangeUserHandle(nIndex, pAnnHandle)
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 |
nIndex |
Index of the user handle to change. This index is zero-based. |
pAnnHandle |
Pointer to an ANNHANDLE structure that defines how to change the user handle. |
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Use this function to change the properties of an existing user-defined annotation handle.
This function is used in conjunction with the LAnnFreehand::AddUserHandle and LAnnFreehand::EnumerateHandles 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. |
Win32, x64.
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// This example changes the first user handle of an object by // * Moving handle ten pixels to the left // * Changing color of handle to blue // * Changing shape of handle to square // * Displaying the hour glass cursor when mouse over the handle
L_INT LAnnFreehand_ChangeUserHandleExample(LAnnFreehand *LFreehand)
{
L_INT nRet;
L_UINT uCount;
ANNHANDLE AnnHandle;
// Get the total count of user handles
nRet = LFreehand->GetUserHandles(NULL, &uCount);
if(nRet != SUCCESS)
return nRet;
if (uCount > 0)
{
memset(&AnnHandle, 0, sizeof(ANNHANDLE));
AnnHandle.uStructSize = sizeof(&AnnHandle);
nRet = LFreehand->GetUserHandle(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 = LFreehand->ChangeUserHandle(0, &AnnHandle);
if(nRet != SUCCESS)
return nRet;
}
else
{
MessageBox(NULL, TEXT("No User Handles!"), TEXT("Error"), MB_OK);
return FAILURE;
}
return SUCCESS;
}
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