GraphicsPath.IsOutlineVisible Method

Source:

GraphicsPath.cs

Source:

GraphicsPath.cs

public:
 bool IsOutlineVisible(int x, int y, System::Drawing::Pen ^ pen, System::Drawing::Graphics ^ graphics);

public bool IsOutlineVisible (int x, int y, System.Drawing.Pen pen, System.Drawing.Graphics? graphics);

public bool IsOutlineVisible (int x, int y, System.Drawing.Pen pen, System.Drawing.Graphics graphics);

member this.IsOutlineVisible : int * int * System.Drawing.Pen * System.Drawing.Graphics -> bool

Public Function IsOutlineVisible (x As Integer, y As Integer, pen As Pen, graphics As Graphics) As Boolean

Parameters

Returns

This method returns true if the specified point is contained within the outline of this GraphicsPath as drawn with the specified Pen; otherwise, false.

Examples

The following code example is designed for use with Windows Forms, and it requires PaintEventArgs e, an OnPaint event. The code performs the following actions:

• Creates a path.

• Adds a rectangle to the path.

• Creates a wide pen and widens the path with that pen (to make the example clearer),

• Tests a point (100, 50) to see if it lies within (under) one of the edges of the rectangle by calling IsOutlineVisible.

The result is shown in the message box (in this case, true). In other words the edge is rendered over that point.

public:
   void IsOutlineVisibleExample( PaintEventArgs^ e )
   {
      GraphicsPath^ myPath = gcnew GraphicsPath;
      Rectangle rect = Rectangle(20,20,100,100);
      myPath->AddRectangle( rect );
      Pen^ testPen = gcnew Pen( Color::Black,20.0f );
      myPath->Widen( testPen );
      e->Graphics->FillPath( Brushes::Black, myPath );
      bool visible = myPath->IsOutlineVisible( 100, 50, testPen, e->Graphics );
      MessageBox::Show( String::Format( "visible = {0}", visible ) );
   }

public void IsOutlineVisibleExample(PaintEventArgs e)
{
    GraphicsPath myPath = new GraphicsPath();
    Rectangle rect = new Rectangle(20, 20, 100, 100);
    myPath.AddRectangle(rect);
    Pen testPen = new Pen(Color.Black, 20);
    myPath.Widen(testPen);
    e.Graphics.FillPath(Brushes.Black, myPath);
    bool visible = myPath.IsOutlineVisible(100, 50, testPen,
        e.Graphics);
    MessageBox.Show("visible = " + visible.ToString());
}

Public Sub IsOutlineVisibleExample(ByVal e As PaintEventArgs)
    Dim myPath As New GraphicsPath
    Dim rect As New Rectangle(20, 20, 100, 100)
    myPath.AddRectangle(rect)
    Dim testPen As New Pen(Color.Black, 20)
    myPath.Widen(testPen)
    e.Graphics.FillPath(Brushes.Black, myPath)
    Dim visible As Boolean = myPath.IsOutlineVisible(100, 50, _
    testPen, e.Graphics)
    MessageBox.Show(("visible = " + visible.ToString()))
End Sub

Remarks

This method tests to see if the outline of a given path is rendered visible at the specified point. The coordinates of the point to be tested are given in world coordinates. The transform matrix of graphics is temporarily applied before testing for visibility.

Source:

GraphicsPath.cs

Source:

GraphicsPath.cs

public:
 bool IsOutlineVisible(System::Drawing::Point pt, System::Drawing::Pen ^ pen, System::Drawing::Graphics ^ graphics);

public bool IsOutlineVisible (System.Drawing.Point pt, System.Drawing.Pen pen, System.Drawing.Graphics? graphics);

public bool IsOutlineVisible (System.Drawing.Point pt, System.Drawing.Pen pen, System.Drawing.Graphics graphics);

member this.IsOutlineVisible : System.Drawing.Point * System.Drawing.Pen * System.Drawing.Graphics -> bool

Public Function IsOutlineVisible (pt As Point, pen As Pen, graphics As Graphics) As Boolean

Parameters

Returns

This method returns true if the specified point is contained within the outline of this GraphicsPath as drawn with the specified Pen; otherwise, false.

Examples

For an example, see IsOutlineVisible(Int32, Int32, Pen, Graphics).

Remarks

This method tests to see if the outline of a given path is rendered visible at the specified point. The coordinates of the point to be tested are given in world coordinates. The transform matrix of graphics is temporarily applied before testing for visibility.

Source:

GraphicsPath.cs

Source:

GraphicsPath.cs

public:
 bool IsOutlineVisible(float x, float y, System::Drawing::Pen ^ pen, System::Drawing::Graphics ^ graphics);

public bool IsOutlineVisible (float x, float y, System.Drawing.Pen pen, System.Drawing.Graphics? graphics);

public bool IsOutlineVisible (float x, float y, System.Drawing.Pen pen, System.Drawing.Graphics graphics);

member this.IsOutlineVisible : single * single * System.Drawing.Pen * System.Drawing.Graphics -> bool

Public Function IsOutlineVisible (x As Single, y As Single, pen As Pen, graphics As Graphics) As Boolean

Parameters

Returns

This method returns true if the specified point is contained within (under) the outline of this GraphicsPath as drawn with the specified Pen; otherwise, false.

Examples

For an example, see IsOutlineVisible(Int32, Int32, Pen, Graphics).

Remarks

This method tests to see if the outline of a given path is rendered visible at the specified point. The coordinates of the point to be tested are given in world coordinates. The transform matrix of the graphics parameter is temporarily applied before testing for visibility.

Source:

GraphicsPath.cs

Source:

GraphicsPath.cs

public:
 bool IsOutlineVisible(float x, float y, System::Drawing::Pen ^ pen);

public bool IsOutlineVisible (float x, float y, System.Drawing.Pen pen);

member this.IsOutlineVisible : single * single * System.Drawing.Pen -> bool

Public Function IsOutlineVisible (x As Single, y As Single, pen As Pen) As Boolean

Parameters

Returns

This method returns true if the specified point is contained within the outline of this GraphicsPath when drawn with the specified Pen; otherwise, false.

Examples

For an example, see IsOutlineVisible(Int32, Int32, Pen, Graphics).

Remarks

This method tests to see if the outline of a given path is rendered visible at the specified point.

Source:

GraphicsPath.cs

Source:

GraphicsPath.cs

public:
 bool IsOutlineVisible(System::Drawing::PointF point, System::Drawing::Pen ^ pen);

public bool IsOutlineVisible (System.Drawing.PointF point, System.Drawing.Pen pen);

member this.IsOutlineVisible : System.Drawing.PointF * System.Drawing.Pen -> bool

Public Function IsOutlineVisible (point As PointF, pen As Pen) As Boolean

Parameters

Returns

This method returns true if the specified point is contained within the outline of this GraphicsPath when drawn with the specified Pen; otherwise, false.

Examples

For an example, see IsOutlineVisible(Int32, Int32, Pen, Graphics).

Remarks

This method tests to see if the outline of a given path is rendered visible at the specified point.

Source:

GraphicsPath.cs

Source:

GraphicsPath.cs

public:
 bool IsOutlineVisible(System::Drawing::PointF pt, System::Drawing::Pen ^ pen, System::Drawing::Graphics ^ graphics);

public bool IsOutlineVisible (System.Drawing.PointF pt, System.Drawing.Pen pen, System.Drawing.Graphics? graphics);

public bool IsOutlineVisible (System.Drawing.PointF pt, System.Drawing.Pen pen, System.Drawing.Graphics graphics);

member this.IsOutlineVisible : System.Drawing.PointF * System.Drawing.Pen * System.Drawing.Graphics -> bool

Public Function IsOutlineVisible (pt As PointF, pen As Pen, graphics As Graphics) As Boolean

Parameters

Returns

This method returns true if the specified point is contained within (under) the outline of this GraphicsPath as drawn with the specified Pen; otherwise, false.

Examples

For an example, see IsOutlineVisible(Int32, Int32, Pen, Graphics).

Remarks

This method tests to see if the outline of a given path is rendered visible at the specified point. The coordinates of the point to be tested are given in world coordinates. The transform matrix of graphics is temporarily applied before testing for visibility.

Source:

GraphicsPath.cs

Source:

GraphicsPath.cs

public:
 bool IsOutlineVisible(int x, int y, System::Drawing::Pen ^ pen);

public bool IsOutlineVisible (int x, int y, System.Drawing.Pen pen);

member this.IsOutlineVisible : int * int * System.Drawing.Pen -> bool

Public Function IsOutlineVisible (x As Integer, y As Integer, pen As Pen) As Boolean

Parameters

Returns

This method returns true if the specified point is contained within the outline of this GraphicsPath when drawn with the specified Pen; otherwise, false.

Examples

For an example, see IsOutlineVisible(Int32, Int32, Pen, Graphics).

Remarks

This method tests to see if the outline of a given path is rendered visible at the specified point.

Source:

GraphicsPath.cs

Source:

GraphicsPath.cs

public:
 bool IsOutlineVisible(System::Drawing::Point point, System::Drawing::Pen ^ pen);

public bool IsOutlineVisible (System.Drawing.Point point, System.Drawing.Pen pen);

member this.IsOutlineVisible : System.Drawing.Point * System.Drawing.Pen -> bool

Public Function IsOutlineVisible (point As Point, pen As Pen) As Boolean

Parameters

Returns

This method returns true if the specified point is contained within the outline of this GraphicsPath when drawn with the specified Pen; otherwise, false.

Examples

For an example, see IsOutlineVisible(Int32, Int32, Pen, Graphics).

Remarks

This method tests to see if the outline of a given path is rendered visible at the specified point.