Point.Subtraction(Point, Size) Operatore

Definizione

Spazio dei nomi:

System.Drawing

Assembly:

System.Drawing.Primitives.dll

Origine:

Point.cs

Converte un elemento Point in base al valore negativo di un elemento Size.

public:
 static System::Drawing::Point operator -(System::Drawing::Point pt, System::Drawing::Size sz);

public static System.Drawing.Point operator - (System.Drawing.Point pt, System.Drawing.Size sz);

static member ( - ) : System.Drawing.Point * System.Drawing.Size -> System.Drawing.Point

Public Shared Operator - (pt As Point, sz As Size) As Point

Parametri

pt

Point

Point da convertire.

sz

Size

Oggetto Size che specifica la coppia di numeri da sottrarre alle coordinate di pt.

Restituisce

Point

Struttura Point traslata in base al valore negativo di una determinata struttura Size.

Esempio

Nell'esempio di codice seguente viene illustrato come usare e PointConverter l'operatore Subtraction . Questo esempio è progettato per essere usato con Windows Forms. Incollare questo codice in una maschera e chiamare il ShowPointConverter metodo quando si gestisce l'evento del Paint modulo, passando e come PaintEventArgs.

void ShowPointConverter( PaintEventArgs^ e )
{
   // Create the PointConverter.
   System::ComponentModel::TypeConverter^ converter = System::ComponentModel::TypeDescriptor::GetConverter( Point::typeid );
   Point point1 =  *dynamic_cast<Point^>(converter->ConvertFromString( "200, 200" ));

   // Use the subtraction operator to get a second point.
   Point point2 = point1 - System::Drawing::Size( 190, 190 );

   // Draw a line between the two points.
   e->Graphics->DrawLine( Pens::Black, point1, point2 );
}

private void ShowPointConverter(PaintEventArgs e)
{

    // Create the PointConverter.
    System.ComponentModel.TypeConverter converter = 
        System.ComponentModel.TypeDescriptor.GetConverter(typeof(Point));

    Point point1 = (Point) converter.ConvertFromString("200, 200");

    // Use the subtraction operator to get a second point.
    Point point2 = point1 - new Size(190, 190);

    // Draw a line between the two points.
    e.Graphics.DrawLine(Pens.Black, point1, point2);
}

Private Sub ShowPointConverter(ByVal e As PaintEventArgs)

    ' Create the PointConverter.
    Dim converter As System.ComponentModel.TypeConverter = _
        System.ComponentModel.TypeDescriptor.GetConverter(GetType(Point))

    Dim point1 As Point = _
        CType(converter.ConvertFromString("200, 200"), Point)

    ' Use the subtraction operator to get a second point.
    Dim point2 As Point = Point.op_Subtraction(point1, _
        New Size(190, 190))

    ' Draw a line between the two points.
    e.Graphics.DrawLine(Pens.Black, point1, point2)
End Sub