virtual L_INT LAnnPolyRuler::GetPoints(pPoints)
Fills the specified array of ANNPOINT structures with the vertices of the annotation object.
Pointer to the array that this function will fill with the vertices of the object.
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
You can use the LAnnPolyRuler::GetPointCount function to determine the required size of the array before calling this function.
The ANNPOINT structure is like a Windows POINT structure, except that it uses double-precision floating point values.
Coordinates of an object's points are relative to its container object. The coordinates are interpreted using the container's scaling factors and offsets, which are described in Low-Level Coordinate System for Annotations.
Win32, x64.
This example gets the points for an object, shrinks the object by 1/2
and then puts the points back to the object.
L_INT LAnnPolyRuler_GetPointsExample(HWND hwnd, LAnnContainer& LeadContainer,
L_BOOL fDoubleClick, L_INT x, L_INT y, L_UINT keyFlags)
{
UNREFERENCED_PARAMETER(keyFlags);
UNREFERENCED_PARAMETER(fDoubleClick);
UNREFERENCED_PARAMETER(hwnd);
L_INT nRet;
HANNOBJECT hObject; // Local variable for the annotation object
POINT PointToTest; // The point in the window's client area to test
L_UINT TestResult; // Result of the test
pANNPOINT pPoints; // Pointer to the points in the object
L_UINT uCount; // Number of points in the object
L_INT i;
ANNRECT rcDefine;// Defining rectangle for the object
L_DOUBLE cx; // Center x point
L_DOUBLE cy; // Center y point
LBuffer LeadBuffer ;
ANNHITTESTINFO HitTestInfo;
memset(&HitTestInfo, 0, sizeof(ANNHITTESTINFO));
HitTestInfo.uStructSize = sizeof(ANNHITTESTINFO);
// Did we hit an object?
// Use incoming coordinates to specify the point to test
PointToTest.x = x;
PointToTest.y = y;
// Get the object at the specified point
nRet = LeadContainer.HitTest ( &PointToTest, &TestResult, &hObject, &HitTestInfo, sizeof(ANNHITTESTINFO));
if(nRet != SUCCESS)
return nRet;
if ( TestResult == ANNHIT_BODY )
{
LAnnPolyRuler LeadPolyRuler(hObject) ;
// first, get the # of points in the object
uCount = LeadPolyRuler.GetPointCount();
LeadBuffer.Reallocate(sizeof(ANNPOINT) * uCount);
pPoints = (pANNPOINT)LeadBuffer.Lock() ;
// Now, get the points
nRet = LeadPolyRuler.GetPoints(pPoints);
if(nRet != SUCCESS)
return nRet;
// Get the defining rect, and find the center point
nRet = LeadPolyRuler.GetRect ( &rcDefine );
if(nRet != SUCCESS)
return nRet;
cx = (rcDefine.right + rcDefine.left) / 2;
cy = (rcDefine.bottom + rcDefine.top) / 2;
for (i=0; i<(L_INT)uCount; i++)
{
pPoints[i].x += (cx - pPoints[i].x) / 2;
pPoints[i].y += (cy - pPoints[i].y) / 2;
}
// Put the new points back into the object
nRet = LeadPolyRuler.SetPoints ( pPoints, uCount);
if(nRet != SUCCESS)
return nRet;
LeadBuffer.Unlock() ;
}
return SUCCESS;
}
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