Color.GetHue Метод

Определение

Возвращает значение оттенка (оттенок-насыщенность-освещенность (HSL)) в градусах для данной структуры Color.Gets the hue-saturation-lightness (HSL) hue value, in degrees, for this Color structure.

public:
 float GetHue();
public float GetHue ();
member this.GetHue : unit -> single
Public Function GetHue () As Single

Возвращаемое значение

Single

Оттенок в градусах этой структуры Color.The hue, in degrees, of this Color. Оттенок измеряется в градусах, в диапазоне от 0,0 до 360,0, в цветовом пространстве HSL.The hue is measured in degrees, ranging from 0.0 through 360.0, in HSL color space.

Примеры

Следующий пример кода предназначен для использования с Windows Forms и требует PaintEventArgs e , что является параметром Paint обработчика событий.The following code example is designed for use with Windows Forms, and it requires PaintEventArgs e, which is a parameter of the Paint event handler. Код выполняет следующие действия.The code performs the following actions:

  • Создает экземпляр Color структуры, redShade который будет использоваться для сравнений.Creates an instance of a Color structure, redShade, to be used for comparisons.

  • Выполняет перебор KnownColor элементов перечисления, чтобы найти все известные цвета, имеющие тот же тон, что и redShade .Iterates through the KnownColor enumeration elements to find all known colors that have the same hue as redShade. Итерации завершаются, когда Найдено 15 совпадений или значение счетчика цикла больше, чем последний KnownColor элемент.The iterations are terminated when 15 matches are found or the value of the loop counter is greater than the last KnownColor element.

  • Во время каждой итерации сохраняет KnownColor элемент, если он соответствует критерию в массиве.During each iteration, saves the KnownColor element - if it matches the criteria - in an array.

  • Использует кисть для рисования прямоугольников.Uses a brush to paint rectangles.

Первый прямоугольник закрашивается цветом, представленным в redShade .The first rectangle is painted the color represented by redShade. Каждый из остальных прямоугольников закрашивается KnownColor , который соответствует оттенок redShade .Each of the other rectangles is painted a KnownColor that matches the hue of the redShade.

void GetHueExample( PaintEventArgs^ e )
{
   Graphics^ g = e->Graphics;

   // Color structures. One is a variable used for temporary storage. The other
   // is a constant used for comparisons.
   Color someColor = Color::FromArgb( 0 );
   Color redShade = Color::FromArgb( 255, 200, 0, 100 );

   // Array to store KnownColor values that match the hue of the redShade
   // color.
   array<KnownColor>^colorMatches = gcnew array<KnownColor>(15);

   // Number of matches found.
   int count = 0;

   // Iterate through the KnownColor enums until 15 matches are found.
   for ( KnownColor enumValue = (KnownColor)0; enumValue <= KnownColor::YellowGreen && count < 15; enumValue = enumValue + (KnownColor)1 )
   {
      someColor = Color::FromKnownColor( enumValue );
      if ( someColor.GetHue() == redShade.GetHue() )
               colorMatches[ count++ ] = enumValue;
   }

   // Display the redShade color and its argb value.
   SolidBrush^ myBrush1 = gcnew SolidBrush( redShade );
   System::Drawing::Font^ myFont = gcnew System::Drawing::Font( "Arial",12 );
   int x = 20;
   int y = 20;
   someColor = redShade;
   g->FillRectangle( myBrush1, x, y, 100, 30 );
   g->DrawString( someColor.ToString(), myFont, Brushes::Black, (float)x + 120, (float)y );

   // Iterate through the matches that were found and display each color that
   // corresponds with the enum value in the array. also display the name of
   // the KnownColor.
   for ( int i = 0; i < count; i++ )
   {
      y += 40;
      someColor = Color::FromKnownColor( colorMatches[ i ] );
      myBrush1->Color = someColor;
      g->FillRectangle( myBrush1, x, y, 100, 30 );
      g->DrawString( someColor.ToString(), myFont, Brushes::Black, (float)x + 120, (float)y );
   }
}
public void GetHueExample(PaintEventArgs e)
{
    Graphics     g = e.Graphics;
             
    // Color structures. One is a variable used for temporary storage. The other
    // is a constant used for comparisons.
    Color   someColor = Color.FromArgb(0);
    Color   redShade = Color.FromArgb(255, 200, 0, 100);
             
    // Array to store KnownColor values that match the hue of the redShade
    // color.
    KnownColor[]  colorMatches = new KnownColor[15];

    // Number of matches found.
    int  count = 0;   
    
    // Iterate through the KnownColor enums until 15 matches are found.
    for (KnownColor enumValue = 0;
        enumValue <= KnownColor.YellowGreen && count < 15; enumValue++)
    {
        someColor = Color.FromKnownColor(enumValue);
        if (someColor.GetHue() == redShade.GetHue())
            colorMatches[count++] = enumValue;
    }
             
    // Display the redShade color and its argb value.
    SolidBrush  myBrush1 = new SolidBrush(redShade);
    Font        myFont = new Font("Arial", 12);
    int         x = 20;
    int         y = 20;
    someColor = redShade;
    g.FillRectangle(myBrush1, x, y, 100, 30);
    g.DrawString(someColor.ToString(), myFont, Brushes.Black, x + 120, y);
             
    // Iterate through the matches that were found and display each color that
    // corresponds with the enum value in the array. also display the name of
    // the KnownColor.
    for (int i = 0; i < count; i++)
    {
        y += 40;
        someColor = Color.FromKnownColor(colorMatches[i]);
        myBrush1.Color = someColor;
        g.FillRectangle(myBrush1, x, y, 100, 30);
        g.DrawString(someColor.ToString(), myFont, Brushes.Black, x + 120, y);
    }
}
Public Sub GetHueExample(ByVal e As PaintEventArgs)
    Dim g As Graphics = e.Graphics

    ' Color structures. One is used for temporary storage. The other
    ' is a constant used for comparisons.
    Dim someColor As Color = Color.FromArgb(0)
    Dim redShade As Color = Color.FromArgb(255, 200, 0, 100)

    ' Array for KnownColor values that match the hue of redShade
    ' color.
    Dim colorMatches(15) As KnownColor

    ' Number of matches found.
    Dim count As Integer = 0

    ' Iterate through the KnownColor enums until 15 matches are found.
    Dim enumValue As KnownColor
    For enumValue = 0 To KnownColor.YellowGreen
        someColor = Color.FromKnownColor(enumValue)
        If (someColor.GetHue()) = (redShade.GetHue()) Then
            colorMatches(count) = enumValue
            count += 1
            If count > 15 Then
                Exit For
            End If
        End If
    Next enumValue

    ' Display the redShade color and its argb value.
    Dim myBrush1 As New SolidBrush(redShade)
    Dim myFont As New Font("Arial", 12)
    Dim x As Integer = 20
    Dim y As Integer = 20
    someColor = redShade
    g.FillRectangle(myBrush1, x, y, 100, 30)
    g.DrawString(someColor.ToString(), myFont, Brushes.Black, _
    x + 120, y)

    ' Iterate through the matches that were found and display each
    ' color that corresponds with the enum value in the array. Also
    ' display the name of the KnownColor.
    Dim i As Integer
    For i = 0 To count - 1
        y += 40
        someColor = Color.FromKnownColor(colorMatches(i))
        myBrush1.Color = someColor
        g.FillRectangle(myBrush1, x, y, 100, 30)
        g.DrawString(someColor.ToString(), myFont, Brushes.Black, _
        x + 120, y)
    Next i
End Sub

Применяется к