Point.Subtraction(Point, Size) 運算子

定義

命名空間:

System.Drawing

組件:

System.Drawing.Primitives.dll

來源:

Point.cs

根據指定 Point 的負數來轉換 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

參數

pt

Point

要轉換的 Point。

sz

Size

Size，指定要減去 pt 座標的數字配對。

傳回

Point

Point 結構，由指定的 Size 結構的負數所轉譯。

範例

下列程式代碼範例示範如何使用 PointConverter 和 Subtraction 運算符。 此範例的設計目的是要與 Windows Forms 搭配使用。 將此程式代碼貼到表單中，並在處理表單的事件Paint時呼叫 ShowPointConverter 方法，並傳遞e為 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