Vcl.Touch.Gestures.TCustomGestureRecognizer.ScalePoints
Delphi
function ScalePoints(const Points, GesturePoints: array of TPoint; MinScale: Integer; Scaling: Boolean = False): TGesturePointArray; virtual; abstract;
C++
virtual Vcl::Controls::TGesturePointArray __fastcall ScalePoints(const System::Types::TPoint *Points, const int Points_High, const System::Types::TPoint *GesturePoints, const int GesturePoints_High, int MinScale, bool Scaling = false) = 0 ;
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| function | public | Vcl.Touch.Gestures.pas Vcl.Touch.Gestures.hpp |
Vcl.Touch.Gestures | TCustomGestureRecognizer |
Description
Scales the surface described by a set of input points to match that of the expected set of points.
Override ScalePoints in descendant classes to implement proper scaling of a surface described by a set of input points. The scaling is necessary, since the expected set of points may describe a smaller or a bigger surface, different than the one described by the input points. ScalePoints returns an array of scaled input points. The following table describes the parameters expected by ScalePoints.
| Parameter | Description |
|---|---|
|
Points |
An array of input points to be scaled. |
|
MinScale |
The minimum allowed scale factor. If the scaling factor is below this value, no scaling is performed. |
|
Scaling |
Specifies whether the scaling is asymmetrical. |