GraphicsPath.GetBounds 方法

定义

返回限定此 GraphicsPath 的矩形。

重载

GetBounds()

返回限定此 GraphicsPath 的矩形。

GetBounds(Matrix)

返回当由指定的 GraphicsPath 对该路径进行变换时,限定此 Matrix 的矩形。

GetBounds(Matrix, Pen)

返回当由指定的 GraphicsPath 对当前路径进行变换并且用指定的 Matrix 绘制该路径时,限定此 Pen 的矩形。

GetBounds()

Source:
GraphicsPath.cs
Source:
GraphicsPath.cs
Source:
GraphicsPath.cs

返回限定此 GraphicsPath 的矩形。

public:
 System::Drawing::RectangleF GetBounds();
public System.Drawing.RectangleF GetBounds ();
member this.GetBounds : unit -> System.Drawing.RectangleF
Public Function GetBounds () As RectangleF

返回

一个 RectangleF,表示限定此 GraphicsPath 的矩形。

示例

下面的代码示例旨在与 Windows 窗体 一起使用,它需要 PaintEventArgse事件OnPaint对象。 此代码执行以下操作:

  • 创建图形路径。

  • 向它添加一个椭圆 (圆) ,并将其绘制到屏幕上。

  • 使用 调用 GetBounds 检索圆的边框,并将矩形绘制到屏幕。

  • 创建第二个图形路径。

  • 添加一个圆,并将路径宽度扩大为 10。

  • 绘制屏幕的路径。

  • 检索第二个圆的边框。

  • 将边界矩形绘制到屏幕。

  • 在对话框中显示矩形大小。

请注意,右侧的边框较大, (考虑线条) 的额外宽度。

public:
   void GetBoundsExample( PaintEventArgs^ e )
   {
      // Create path number 1 and a Pen for drawing.
      GraphicsPath^ myPath = gcnew GraphicsPath;
      Pen^ pathPen = gcnew Pen( Color::Black,1.0f );

      // Add an Ellipse to the path and Draw it (circle in start
      // position).
      myPath->AddEllipse( 20, 20, 100, 100 );
      e->Graphics->DrawPath( pathPen, myPath );

      // Get the path bounds for Path number 1 and draw them.
      RectangleF boundRect = myPath->GetBounds();
      e->Graphics->DrawRectangle( gcnew Pen( Color::Red,1.0f ), boundRect.X, boundRect.Y, boundRect.Height, boundRect.Width );

      // Create a second graphics path and a wider Pen.
      GraphicsPath^ myPath2 = gcnew GraphicsPath;
      Pen^ pathPen2 = gcnew Pen( Color::Black,10.0f );

      // Create a new ellipse with a width of 10.
      myPath2->AddEllipse( 150, 20, 100, 100 );
      myPath2->Widen( pathPen2 );
      e->Graphics->FillPath( Brushes::Black, myPath2 );

      // Get the second path bounds.
      RectangleF boundRect2 = myPath2->GetBounds();

      // Draw the bounding rectangle.
      e->Graphics->DrawRectangle( gcnew Pen( Color::Red,1.0f ), boundRect2.X, boundRect2.Y, boundRect2.Height, boundRect2.Width );

      // Display the rectangle size.
      MessageBox::Show( boundRect2.ToString() );
   }
public void GetBoundsExample(PaintEventArgs e)
{
             
    // Create path number 1 and a Pen for drawing.
    GraphicsPath myPath = new GraphicsPath();
    Pen pathPen = new Pen(Color.Black, 1);
             
    // Add an Ellipse to the path and Draw it (circle in start
             
    // position).
    myPath.AddEllipse(20, 20, 100, 100);
    e.Graphics.DrawPath(pathPen, myPath);
             
    // Get the path bounds for Path number 1 and draw them.
    RectangleF boundRect = myPath.GetBounds();
    e.Graphics.DrawRectangle(new Pen(Color.Red, 1),
        boundRect.X,
        boundRect.Y,
        boundRect.Height,
        boundRect.Width);
             
    // Create a second graphics path and a wider Pen.
    GraphicsPath myPath2 = new GraphicsPath();
    Pen pathPen2 = new Pen(Color.Black, 10);
             
    // Create a new ellipse with a width of 10.
    myPath2.AddEllipse(150, 20, 100, 100);
    myPath2.Widen(pathPen2);
    e.Graphics.FillPath(Brushes.Black, myPath2);
             
    // Get the second path bounds.
    RectangleF boundRect2 = myPath2.GetBounds();
             
    // Draw the bounding rectangle.
    e.Graphics.DrawRectangle(new Pen(Color.Red, 1),
        boundRect2.X,
        boundRect2.Y,
        boundRect2.Height,
        boundRect2.Width);
             
    // Display the rectangle size.
    MessageBox.Show(boundRect2.ToString());
}
Public Sub GetBoundsExample(ByVal e As PaintEventArgs)

    ' Create path number 1 and a Pen for drawing.
    Dim myPath As New GraphicsPath
    Dim pathPen As New Pen(Color.Black, 1)

    ' Add an Ellipse to the path and Draw it (circle in start

    ' position).
    myPath.AddEllipse(20, 20, 100, 100)
    e.Graphics.DrawPath(pathPen, myPath)

    ' Get the path bounds for Path number 1 and draw them.
    Dim boundRect As RectangleF = myPath.GetBounds()
    e.Graphics.DrawRectangle(New Pen(Color.Red, 1), boundRect.X, _
    boundRect.Y, boundRect.Height, boundRect.Width)

    ' Create a second graphics path and a wider Pen.
    Dim myPath2 As New GraphicsPath
    Dim pathPen2 As New Pen(Color.Black, 10)

    ' Create a new ellipse with a width of 10.
    myPath2.AddEllipse(150, 20, 100, 100)
    myPath2.Widen(pathPen2)
    e.Graphics.FillPath(Brushes.Black, myPath2)

    ' Get the second path bounds.
    Dim boundRect2 As RectangleF = myPath2.GetBounds()

    ' Show the bounds in a message box.
    e.Graphics.DrawString("Rectangle2 Bounds: " + _
    boundRect2.ToString(), New Font("Arial", 8), Brushes.Black, _
    20, 150)

    ' Draw the bounding rectangle.
    e.Graphics.DrawRectangle(New Pen(Color.Red, 1), boundRect2.X, _
    boundRect2.Y, boundRect2.Height, boundRect2.Width)
End Sub

注解

返回的边界矩形的大小受端盖类型、笔宽度和笔斜度限制的影响,因此会生成与边界路径的“松散拟合”。 近似公式为:初始边界矩形按笔宽度膨胀,此结果乘以斜面限制,以及允许端盖的一些额外边距。

适用于

GetBounds(Matrix)

Source:
GraphicsPath.cs
Source:
GraphicsPath.cs
Source:
GraphicsPath.cs

返回当由指定的 GraphicsPath 对该路径进行变换时,限定此 Matrix 的矩形。

public:
 System::Drawing::RectangleF GetBounds(System::Drawing::Drawing2D::Matrix ^ matrix);
public System.Drawing.RectangleF GetBounds (System.Drawing.Drawing2D.Matrix matrix);
public System.Drawing.RectangleF GetBounds (System.Drawing.Drawing2D.Matrix? matrix);
member this.GetBounds : System.Drawing.Drawing2D.Matrix -> System.Drawing.RectangleF
Public Function GetBounds (matrix As Matrix) As RectangleF

参数

matrix
Matrix

Matrix,指定在计算边框前要应用于此路径的变换。 此路径并非被永久变换;仅在计算边框的进程中使用变换。

返回

一个 RectangleF,表示限定此 GraphicsPath 的矩形。

示例

有关示例,请参见 GetBounds()

注解

返回的边界矩形的大小受端盖类型、笔宽度和笔斜度限制的影响,因此会生成与边界路径的“松散拟合”。 近似公式为:初始边界矩形按笔宽度膨胀,此结果乘以斜面限制,以及允许端盖的一些额外边距。

适用于

GetBounds(Matrix, Pen)

Source:
GraphicsPath.cs
Source:
GraphicsPath.cs
Source:
GraphicsPath.cs

返回当由指定的 GraphicsPath 对当前路径进行变换并且用指定的 Matrix 绘制该路径时,限定此 Pen 的矩形。

public:
 System::Drawing::RectangleF GetBounds(System::Drawing::Drawing2D::Matrix ^ matrix, System::Drawing::Pen ^ pen);
public System.Drawing.RectangleF GetBounds (System.Drawing.Drawing2D.Matrix matrix, System.Drawing.Pen pen);
public System.Drawing.RectangleF GetBounds (System.Drawing.Drawing2D.Matrix? matrix, System.Drawing.Pen? pen);
member this.GetBounds : System.Drawing.Drawing2D.Matrix * System.Drawing.Pen -> System.Drawing.RectangleF
Public Function GetBounds (matrix As Matrix, pen As Pen) As RectangleF

参数

matrix
Matrix

Matrix,指定在计算边框前要应用于此路径的变换。 此路径并非被永久变换;仅在计算边框的进程中使用变换。

pen
Pen

Pen,用于绘制 GraphicsPath

返回

一个 RectangleF,表示限定此 GraphicsPath 的矩形。

示例

有关示例,请参见 GetBounds()

注解

返回的边界矩形的大小受端盖类型、笔宽度和笔斜度限制的影响,因此会生成与边界路径的“松散拟合”。 近似公式为:初始边界矩形按笔宽度膨胀,此结果乘以斜面限制,以及允许端盖的一些额外边距。

适用于