Determines whether the LVectorDialog object is valid.
#include "ltwrappr.h"
L_BOOL LVectorDialog::IsValid(L_VOID)
Value | Meaning |
---|---|
TRUE | There is a pointer to a valid bitmap object. |
FALSE | There is not a pointer to a valid bitmap object. |
Call this function to check if the class object has been associated with a valid LVectorBase object.
Before you can use some of the LVectorDialog functions, a vector must be associated with the class object. Until you have associated a valid vector object with the LVectorDialog object, this function will return false.
In particular, you cannot perform auto-processing without a valid bitmap.
L_INT LVectorDialog__IsValidExample(HWND hWnd)
{
L_INT nRet;
LVectorBase Vector;
LVectorDialog VectorDlg;
//Dialog is invalid unless associated with a vector
if (VectorDlg.IsValid ())
MessageBox(hWnd, TEXT("IsValid() returns TRUE"), TEXT(""), MB_OK);
else
MessageBox(hWnd, TEXT("IsValid() returns FALSE"), TEXT(""), MB_OK);
nRet = Vector.Load(MAKE_IMAGE_PATH(TEXT("random.dxf")));
if(nRet != SUCCESS)
return nRet;
VectorDlg.SetVector(&Vector);
//Now dialog is valid
if (VectorDlg.IsValid())
MessageBox(hWnd, TEXT("IsValid() returns TRUE"), TEXT(""), MB_OK);
else
MessageBox(hWnd, TEXT("IsValid() returns FALSE"), TEXT(""), MB_OK);
//destructor called when out of scope
return SUCCESS;
}
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