Vcl.Graphics.TCustomCanvas.Chord
Delphi
procedure Chord(X1, Y1, X2, Y2, X3, Y3, X4, Y4: Integer); virtual; abstract;
C++
virtual void __fastcall Chord(int X1, int Y1, int X2, int Y2, int X3, int Y3, int X4, int Y4) = 0 ;
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
procedure function |
public | Vcl.Graphics.pas Vcl.Graphics.hpp |
Vcl.Graphics | TCustomCanvas |
Description
Draws a closed figure represented by the intersection of a line and an ellipse.
Override the Chord method to implement creating a shape that is defined by an arc and a line that joins the endpoints of the arc. The chord consists of a portion of an ellipse that is bounded by the points (X1,Y1) and (X2,Y2). The ellipse is bisected by a line that runs between the points (X3,Y3) and (X4,Y4).
The perimeter of the chord runs counterclockwise from (X3, Y3), counterclockwise along the ellipse to (X4,Y4), and straight back to (X3,Y3). If (X3,Y3) and (X4,Y4) are not on the surface of the ellipse, the corresponding corners on the chord are the closest points on the perimeter that intersect the line.