GraphicsPath.GetBounds 方法
定義
重要
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傳回將這個 GraphicsPath系結的矩形。
多載
GetBounds() |
傳回將這個 GraphicsPath系結的矩形。 |
GetBounds(Matrix) |
當指定的 Matrix轉換此路徑時,傳回系結此 GraphicsPath 的矩形。 |
GetBounds(Matrix, Pen) |
傳回矩形,當目前路徑由指定的 Matrix 轉換,並以指定的 Pen繪製時,會傳回系結此 GraphicsPath 的矩形。 |
GetBounds()
傳回將這個 GraphicsPath系結的矩形。
public:
System::Drawing::RectangleF GetBounds();
public System.Drawing.RectangleF GetBounds ();
member this.GetBounds : unit -> System.Drawing.RectangleF
Public Function GetBounds () As RectangleF
傳回
RectangleF,表示系結這個 GraphicsPath的矩形。
範例
下列程式代碼範例的設計目的是要與 Windows Forms 搭配使用,而且需要 PaintEventArgse
OnPaint 事件物件。 程式代碼會執行下列動作:
建立圖形路徑。
將橢圓形 (圓形) 新增至其中,並將它繪製到螢幕。
使用呼叫 GetBounds 擷取圓形的周框,並將矩形繪製到畫面。
建立第二個圖形路徑。
加入圓形,並將路徑寬度擴大為10。
繪製畫面的路徑。
擷取第二個圓形的周框。
將周框繪製到畫面。
在對話框中顯示矩形大小。
請注意,右邊的周框較大(以考慮線條的額外寬度)。
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
備註
傳回周框的大小會受到端點上限、畫筆寬度和畫筆Miter限制的類型影響,因此會產生限定路徑的「鬆散大小」。 近似公式為:初始周框由畫筆寬度擴充,而這個結果會乘以Miter限制,加上一些額外的邊界以允許結束上限。
適用於
GetBounds(Matrix)
當指定的 Matrix轉換此路徑時,傳回系結此 GraphicsPath 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
參數
傳回
RectangleF,表示系結這個 GraphicsPath的矩形。
範例
如需範例,請參閱 GetBounds()。
備註
傳回周框的大小會受到端點上限、畫筆寬度和畫筆Miter限制的類型影響,因此會產生限定路徑的「鬆散大小」。 近似公式為:初始周框由畫筆寬度擴充,而這個結果會乘以Miter限制,加上一些額外的邊界以允許結束上限。
適用於
GetBounds(Matrix, Pen)
傳回矩形,當目前路徑由指定的 Matrix 轉換,並以指定的 Pen繪製時,會傳回系結此 GraphicsPath 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
參數
- pen
- Pen
要用來繪製 GraphicsPath的 Pen。
傳回
RectangleF,表示系結這個 GraphicsPath的矩形。
範例
如需範例,請參閱 GetBounds()。
備註
傳回周框的大小會受到端點上限、畫筆寬度和畫筆Miter限制的類型影響,因此會產生限定路徑的「鬆散大小」。 近似公式為:初始周框由畫筆寬度擴充,而這個結果會乘以Miter限制,加上一些額外的邊界以允許結束上限。