LAnnCurveClosed::GetPoints
#include "ltwrappr.h"
virtual L_INT LAnnCurveClosed::GetPoints(pPoints)
pANNPOINT pPoints; |
/* pointer to the array */ |
Fills the specified array of ANNPOINT structures with the vertices of the annotation object. This function is available in the Document/Medical Toolkits.
Parameter |
Description |
pPoints |
Pointer to the array that this function will fill with the vertices of the object. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
You can use the LAnnCurveClosed::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.
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. |
See Also
Functions: |
|
Topics: |
Annotation Functions: Getting and Setting Geometric Properties |
|
Annotation Functions: Using Window Coordinates to Define an Object |
Example
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 LAnnCurveClosed_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 ) { LAnnCurveClosed LeadCurveClosed(hObject) ; // first, get the # of points in the object uCount = LeadCurveClosed.GetPointCount(); LeadBuffer.Reallocate(sizeof(ANNPOINT) * uCount); pPoints = (pANNPOINT)LeadBuffer.Lock() ; // Now, get the points nRet = LeadCurveClosed.GetPoints(pPoints); if(nRet != SUCCESS) return nRet; // Get the defining rect, and find the center point nRet = LeadCurveClosed.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 = LeadCurveClosed.SetPoints ( pPoints, uCount); if(nRet != SUCCESS) return nRet; LeadBuffer.Unlock() ; } else return FAILURE; return SUCCESS; }