protected override HCShapeLineObj GetObjAt(int x, int y)
{
HCShapeLineObj vResult = HCShapeLineObj.sloNone;
if (HC.PtInRect(new RECT(StartPt.X - PointSize, StartPt.Y - PointSize,
StartPt.X + PointSize, StartPt.Y + PointSize), new POINT(x, y)))
{
vResult = HCShapeLineObj.sloStart;
}
else
if (HC.PtInRect(new RECT(EndPt.X - PointSize, EndPt.Y - PointSize,
EndPt.X + PointSize, EndPt.Y + PointSize), new POINT(x, y)))
{
vResult = HCShapeLineObj.sloEnd;
}
else
{
RECT vRect = ClientRect();
vRect.Inflate(PointSize, PointSize);
IntPtr vRgn1 = GDI.CreateEllipticRgnIndirect(ref vRect);
try
{
if (GDI.PtInRegion(vRgn1, x, y)) // 在外围
{
vRect.Inflate(-PointSize - PointSize, -PointSize - PointSize);
IntPtr vRgn2 = GDI.CreateEllipticRgnIndirect(ref vRect);
try
{
if (!GDI.PtInRegion(vRgn2, x, y)) // 不在内围
{
vResult = HCShapeLineObj.sloLine;
}
}
finally
{
GDI.DeleteObject(vRgn2);
}
}
}
finally
{
GDI.DeleteObject(vRgn1);
}
}
return(vResult);
}
