Blend 類別

定義

public ref class Blend sealed

public sealed class Blend

type Blend = class

Public NotInheritable Class Blend

繼承

Object

Blend

範例

以下範例旨在用於 Windows Forms 環境。 它示範如何結合BlendLinearGradientBrush類別，將顏色混合到螢幕上，將顏色混合。 橢圓左側為藍色，中心與紅色融合，右側再融合回藍色。 這是透過myFactors設定 和 myPositions 屬性中使用FactorsPositions的陣列來實現的。 注意，所命名物件的Blend性質必須等於物件 LinearGradientBrushlgBrush2。BlendmyBlend

public:
   void BlendConstExample( PaintEventArgs^ e )
   {
      //Draw ellipse using Blend.
      Point startPoint2 = Point(20,110);
      Point endPoint2 = Point(140,110);
      array<Single>^myFactors = {.2f,.4f,.8f,.8f,.4f,.2f};
      array<Single>^myPositions = {0.0f,.2f,.4f,.6f,.8f,1.0f};
      Blend^ myBlend = gcnew Blend;
      myBlend->Factors = myFactors;
      myBlend->Positions = myPositions;
      LinearGradientBrush^ lgBrush2 =
            gcnew LinearGradientBrush( startPoint2,endPoint2,Color::Blue,Color::Red );
      lgBrush2->Blend = myBlend;
      Rectangle ellipseRect2 = Rectangle(20,110,120,80);
      e->Graphics->FillEllipse( lgBrush2, ellipseRect2 );

      // End example.
   }

public void BlendConstExample(PaintEventArgs e)
{
             
    //Draw ellipse using Blend.
    Point startPoint2 = new Point(20, 110);
    Point endPoint2 = new Point(140, 110);
    float[] myFactors = {.2f,.4f,.8f,.8f,.4f,.2f};
    float[] myPositions = {0.0f,.2f,.4f,.6f,.8f,1.0f};
    Blend myBlend = new Blend();
    myBlend.Factors = myFactors;
    myBlend.Positions = myPositions;
    LinearGradientBrush lgBrush2 = new LinearGradientBrush(
        startPoint2,
        endPoint2,
        Color.Blue,
        Color.Red);
    lgBrush2.Blend = myBlend;
    Rectangle ellipseRect2 = new Rectangle(20, 110, 120, 80);
    e.Graphics.FillEllipse(lgBrush2, ellipseRect2);
             
    // End example.
}

Public Sub BlendConstExample(ByVal e As PaintEventArgs)

    ' Draw ellipse using Blend.
    Dim startPoint2 As New Point(20, 110)
    Dim endPoint2 As New Point(140, 110)
    Dim myFactors As Single() = {0.2F, 0.4F, 0.8F, 0.8F, 0.4F, 0.2F}
    Dim myPositions As Single() = {0.0F, 0.2F, 0.4F, 0.6F, 0.8F, 1.0F}
    Dim myBlend As New Blend
    myBlend.Factors = myFactors
    myBlend.Positions = myPositions
    Dim lgBrush2 As New LinearGradientBrush(startPoint2, endPoint2, _
    Color.Blue, Color.Red)
    lgBrush2.Blend = myBlend
    Dim ellipseRect2 As New Rectangle(20, 110, 120, 80)
    e.Graphics.FillEllipse(lgBrush2, ellipseRect2)
End Sub

備註

漸層常用來平滑地遮蔽形狀的內部。 混合模式由兩個陣列（Factors 和 Positions）定義，每個陣列包含相同數量的元素。 陣列中的 Positions 每個元素代表沿梯度線距離的比例。 陣列中的 Factors 每個元素代表漸變混合中起始與結束顏色在梯度線上對應元素 Positions 所代表的位置的比例。

例如，若與Positions陣列中Factors對應元素分別為0.2和0.3，且在一條100像素線從藍色到紅色的線性漸層中，該線沿20像素（距離的20%）的顏色由30%藍色和70%紅色組成。