GraphicsPath.GetBounds 方法

定义

返回一个矩形,该矩形绑定此 GraphicsPath

重载

GetBounds()

返回一个矩形,该矩形绑定此 GraphicsPath

GetBounds(Matrix)

返回一个矩形,当此路径由指定的 Matrix转换时绑定此 GraphicsPath

GetBounds(Matrix, Pen)

返回一个矩形,当当前路径由指定的 Matrix 转换并使用指定的 Pen绘制时,该矩形将此 GraphicsPath 绑定。

GetBounds()

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

返回一个矩形,该矩形绑定此 GraphicsPath

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

返回

一个表示此 GraphicsPath的矩形的 RectangleF

示例

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

  • 创建图形路径。

  • 向它添加椭圆(圆圈),并将其绘制到屏幕。

  • 使用调用 GetBounds 检索圆的边界矩形,并将矩形绘制到屏幕。

  • 创建第二个图形路径。

  • 添加一个圆,并将路径加宽为 10。

  • 绘制屏幕的路径。

  • 检索第二个圆的边界矩形。

  • 将边框绘制到屏幕。

  • 在对话框中显示矩形大小。

请注意,右侧的边界矩形较大(以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结束帽、笔宽和笔 miter 限制的类型的影响,因此会生成一个“松散的拟合”到边界路径。 近似公式是:初始边界矩形由笔宽膨胀,此结果乘以 miter 限制,外加一些额外的边距以允许结束上限。

适用于

GetBounds(Matrix)

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

返回一个矩形,当此路径由指定的 Matrix转换时绑定此 GraphicsPath

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

指定在计算边界矩形之前要应用于此路径的转换的 Matrix。 此路径不会永久转换;转换仅在计算边界矩形的过程中使用。

返回

一个表示此 GraphicsPath的矩形的 RectangleF

示例

有关示例,请参阅 GetBounds()

注解

返回的边界矩形的大小受结束帽、笔宽和笔 miter 限制的类型的影响,因此会生成一个“松散的拟合”到边界路径。 近似公式是:初始边界矩形由笔宽膨胀,此结果乘以 miter 限制,外加一些额外的边距以允许结束上限。

适用于

GetBounds(Matrix, Pen)

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

返回一个矩形,当当前路径由指定的 Matrix 转换并使用指定的 Pen绘制时,该矩形将此 GraphicsPath 绑定。

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

指定在计算边界矩形之前要应用于此路径的转换的 Matrix。 此路径不会永久转换;转换仅在计算边界矩形的过程中使用。

pen
Pen

绘制 GraphicsPathPen

返回

一个表示此 GraphicsPath的矩形的 RectangleF

示例

有关示例,请参阅 GetBounds()

注解

返回的边界矩形的大小受结束帽、笔宽和笔 miter 限制的类型的影响,因此会生成一个“松散的拟合”到边界路径。 近似公式是:初始边界矩形由笔宽膨胀,此结果乘以 miter 限制,外加一些额外的边距以允许结束上限。

适用于