Matrix.RotateAt 方法

Source:

Matrix.cs

Source:

Matrix.cs

Source:

Matrix.cs

Source:

Matrix.cs

Source:

Matrix.cs

public:
 void RotateAt(float angle, System::Drawing::PointF point);

public void RotateAt (float angle, System.Drawing.PointF point);

member this.RotateAt : single * System.Drawing.PointF -> unit

Public Sub RotateAt (angle As Single, point As PointF)

参数

示例

下面的代码示例演示如何使用 Matrix 和 Transform 方法来旋转字符串。 此示例旨在与 Windows 窗体一起使用。 创建窗体并将以下代码粘贴到其中。 在表单的 Paint 事件处理程序中调用 DrawVerticalStringFromBottomUp 方法，将 e 作为 PaintEventArgs传递。

private:
   void DrawVerticalStringFromBottomUp( PaintEventArgs^ e )
   {
      // Create the string to draw on the form.
      String^ text = "Can you read this?";

      // Create a GraphicsPath.
      System::Drawing::Drawing2D::GraphicsPath^ path = gcnew System::Drawing::Drawing2D::GraphicsPath;

      // Add the string to the path; declare the font, font style, size, and
      // vertical format for the string.
      path->AddString( text, this->Font->FontFamily, 1, 15, PointF(0.0F,0.0F), gcnew StringFormat( StringFormatFlags::DirectionVertical ) );

      // Declare a matrix that will be used to rotate the text.
      System::Drawing::Drawing2D::Matrix^ rotateMatrix = gcnew System::Drawing::Drawing2D::Matrix;

      // Set the rotation angle and starting point for the text.
      rotateMatrix->RotateAt( 180.0F, PointF(10.0F,100.0F) );

      // Transform the text with the matrix.
      path->Transform(rotateMatrix);

      // Set the SmoothingMode to high quality for best readability.
      e->Graphics->SmoothingMode = System::Drawing::Drawing2D::SmoothingMode::HighQuality;

      // Fill in the path to draw the string.
      e->Graphics->FillPath( Brushes::Red, path );

      // Dispose of the path.
      delete path;
   }

public void DrawVerticalStringFromBottomUp(PaintEventArgs e)
{

    // Create the string to draw on the form.
    string text = "Can you read this?";

    // Create a GraphicsPath.
    System.Drawing.Drawing2D.GraphicsPath path = 
        new System.Drawing.Drawing2D.GraphicsPath();

    // Add the string to the path; declare the font, font style, size, and
    // vertical format for the string.
    path.AddString(text, this.Font.FontFamily, 1, 15, 
        new PointF(0.0F, 0.0F), 
        new StringFormat(StringFormatFlags.DirectionVertical));

    // Declare a matrix that will be used to rotate the text.
    System.Drawing.Drawing2D.Matrix rotateMatrix = 
        new System.Drawing.Drawing2D.Matrix();

    // Set the rotation angle and starting point for the text.
    rotateMatrix.RotateAt(180.0F, new PointF(10.0F, 100.0F));

    // Transform the text with the matrix.
    path.Transform(rotateMatrix);

    // Set the SmoothingMode to high quality for best readability.
    e.Graphics.SmoothingMode = 
        System.Drawing.Drawing2D.SmoothingMode.HighQuality;

    // Fill in the path to draw the string.
    e.Graphics.FillPath(Brushes.Red, path);

    // Dispose of the path.
    path.Dispose();
}

Public Sub DrawVerticalStringFromBottomUp(ByVal e As PaintEventArgs)

    ' Create the string to draw on the form.
    Dim text As String = "Can you read this?"

    ' Create a GraphicsPath.
    Dim path As New System.Drawing.Drawing2D.GraphicsPath

    ' Add the string to the path; declare the font, font style, size, and
    ' vertical format for the string.
    path.AddString(text, Me.Font.FontFamily, 1, 15, New PointF(0.0F, 0.0F), _
        New StringFormat(StringFormatFlags.DirectionVertical))

    ' Declare a matrix that will be used to rotate the text.
    Dim rotateMatrix As New System.Drawing.Drawing2D.Matrix

    ' Set the rotation angle and starting point for the text.
    rotateMatrix.RotateAt(180.0F, New PointF(10.0F, 100.0F))

    ' Transform the text with the matrix.
    path.Transform(rotateMatrix)

    ' Set the SmoothingMode to high quality for best readability.
    e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.HighQuality

    ' Fill in the path to draw the string.
    e.Graphics.FillPath(Brushes.Red, path)

    ' Dispose of the path.
    path.Dispose()

End Sub

Source:

Matrix.cs

Source:

Matrix.cs

Source:

Matrix.cs

Source:

Matrix.cs

Source:

Matrix.cs

public:
 void RotateAt(float angle, System::Drawing::PointF point, System::Drawing::Drawing2D::MatrixOrder order);

public void RotateAt (float angle, System.Drawing.PointF point, System.Drawing.Drawing2D.MatrixOrder order);

member this.RotateAt : single * System.Drawing.PointF * System.Drawing.Drawing2D.MatrixOrder -> unit

Public Sub RotateAt (angle As Single, point As PointF, order As MatrixOrder)

参数

示例

下面的代码示例旨在与 Windows 窗体一起使用，它需要 PaintEventArgsePaint 事件对象。 该代码执行以下操作：

• 在应用旋转转换（蓝色矩形）之前，将矩形绘制到屏幕。

• 创建矩阵并在指定点周围旋转 45 度。

• 将此矩阵转换应用于矩形。

• 将转换后的矩形绘制到屏幕（红色矩形）。

请注意，红色矩形已围绕矩形的左上角旋转（指定 RotateAt 方法的旋转点）。

public:
   void RotateAtExample( PaintEventArgs^ e )
   {
      Pen^ myPen = gcnew Pen( Color::Blue,1.0f );
      Pen^ myPen2 = gcnew Pen( Color::Red,1.0f );
      PointF rotatePoint = PointF(150.0f,50.0f);

      // Draw the rectangle to the screen before applying the
      // transform.
      e->Graphics->DrawRectangle( myPen, 150, 50, 200, 100 );

      // Create a matrix and rotate it 45 degrees.
      Matrix^ myMatrix = gcnew Matrix;
      myMatrix->RotateAt( 45, rotatePoint, MatrixOrder::Append );

      // Draw the rectangle to the screen again after applying the
      // transform.
      e->Graphics->Transform = myMatrix;
      e->Graphics->DrawRectangle( myPen2, 150, 50, 200, 100 );
   }

public void RotateAtExample(PaintEventArgs e)
{
    Pen myPen = new Pen(Color.Blue, 1);
    Pen myPen2 = new Pen(Color.Red, 1);
    PointF rotatePoint = new PointF(150.0f, 50.0f);
             
    // Draw the rectangle to the screen before applying the
    // transform.
    e.Graphics.DrawRectangle(myPen, 150, 50, 200, 100);
             
    // Create a matrix and rotate it 45 degrees.
    Matrix myMatrix = new Matrix();
    myMatrix.RotateAt(45, rotatePoint, MatrixOrder.Append);
             
    // Draw the rectangle to the screen again after applying the
    // transform.
    e.Graphics.Transform = myMatrix;
    e.Graphics.DrawRectangle(myPen2, 150, 50, 200, 100);
}

Public Sub RotateAtExample(ByVal e As PaintEventArgs)
    Dim myPen As New Pen(Color.Blue, 1)
    Dim myPen2 As New Pen(Color.Red, 1)
    Dim rotatePoint As New PointF(150.0F, 50.0F)

    ' Draw the rectangle to the screen before applying the
    ' transform.
    e.Graphics.DrawRectangle(myPen, 150, 50, 200, 100)

    ' Create a matrix and rotate it 45 degrees.
    Dim myMatrix As New Matrix
    myMatrix.RotateAt(45, rotatePoint, MatrixOrder.Append)

    ' Draw the rectangle to the screen again after applying the
    ' transform.
    e.Graphics.Transform = myMatrix
    e.Graphics.DrawRectangle(myPen2, 150, 50, 200, 100)
End Sub