Region.IsVisible Method

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(float x, float y, float width, float height, System::Drawing::Graphics ^ g);

public bool IsVisible (float x, float y, float width, float height, System.Drawing.Graphics? g);

public bool IsVisible (float x, float y, float width, float height, System.Drawing.Graphics g);

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

Public Function IsVisible (x As Single, y As Single, width As Single, height As Single, g As Graphics) As Boolean

Parameters

Returns

true when any portion of the specified rectangle is contained within this Region; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Remarks

The current transformation of the graphics context is used to compute the region interior and the rectangle coordinates on the drawing surface.

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(int x, int y, int width, int height, System::Drawing::Graphics ^ g);

public bool IsVisible (int x, int y, int width, int height, System.Drawing.Graphics? g);

public bool IsVisible (int x, int y, int width, int height, System.Drawing.Graphics g);

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

Public Function IsVisible (x As Integer, y As Integer, width As Integer, height As Integer, g As Graphics) As Boolean

Parameters

Returns

true when any portion of the specified rectangle is contained within this Region; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Remarks

The current transformation of the graphics context is used to compute the region interior and the rectangle coordinates on the drawing surface.

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(float x, float y, float width, float height);

public bool IsVisible (float x, float y, float width, float height);

member this.IsVisible : single * single * single * single -> bool

Public Function IsVisible (x As Single, y As Single, width As Single, height As Single) As Boolean

Parameters

Returns

true when any portion of the specified rectangle is contained within this Region object; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(int x, int y, int width, int height);

public bool IsVisible (int x, int y, int width, int height);

member this.IsVisible : int * int * int * int -> bool

Public Function IsVisible (x As Integer, y As Integer, width As Integer, height As Integer) As Boolean

Parameters

Returns

true when any portion of the specified rectangle is contained within this Region; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(float x, float y, System::Drawing::Graphics ^ g);

public bool IsVisible (float x, float y, System.Drawing.Graphics? g);

public bool IsVisible (float x, float y, System.Drawing.Graphics g);

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

Public Function IsVisible (x As Single, y As Single, g As Graphics) As Boolean

Parameters

Returns

true when the specified point is contained within this Region; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Remarks

The current transformation of the graphics context is used to compute the region interior and the point coordinates on the drawing surface.

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(int x, int y, System::Drawing::Graphics ^ g);

public bool IsVisible (int x, int y, System.Drawing.Graphics? g);

public bool IsVisible (int x, int y, System.Drawing.Graphics g);

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

Public Function IsVisible (x As Integer, y As Integer, g As Graphics) As Boolean

Parameters

Returns

true when the specified point is contained within this Region; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Remarks

The current transformation of the graphics context is used to compute the region interior and the point coordinates on the drawing surface.

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(float x, float y);

public bool IsVisible (float x, float y);

member this.IsVisible : single * single -> bool

Public Function IsVisible (x As Single, y As Single) As Boolean

Parameters

Returns

true when the specified point is contained within this Region; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(System::Drawing::Point point);

public bool IsVisible (System.Drawing.Point point);

member this.IsVisible : System.Drawing.Point -> bool

Public Function IsVisible (point As Point) As Boolean

Parameters

Returns

true when point is contained within this Region; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(System::Drawing::Rectangle rect, System::Drawing::Graphics ^ g);

public bool IsVisible (System.Drawing.Rectangle rect, System.Drawing.Graphics? g);

public bool IsVisible (System.Drawing.Rectangle rect, System.Drawing.Graphics g);

member this.IsVisible : System.Drawing.Rectangle * System.Drawing.Graphics -> bool

Public Function IsVisible (rect As Rectangle, g As Graphics) As Boolean

Parameters

Returns

true when any portion of the rect is contained within this Region; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Remarks

The current transformation of the graphics context is used to compute the region interior and the rectangle coordinates on the drawing surface.

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(System::Drawing::PointF point, System::Drawing::Graphics ^ g);

public bool IsVisible (System.Drawing.PointF point, System.Drawing.Graphics? g);

public bool IsVisible (System.Drawing.PointF point, System.Drawing.Graphics g);

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

Public Function IsVisible (point As PointF, g As Graphics) As Boolean

Parameters

Returns

true when point is contained within this Region; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Remarks

The current transformation of the graphics context is used to compute the region interior and the point coordinates on the drawing surface.

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(System::Drawing::Point point, System::Drawing::Graphics ^ g);

public bool IsVisible (System.Drawing.Point point, System.Drawing.Graphics? g);

public bool IsVisible (System.Drawing.Point point, System.Drawing.Graphics g);

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

Public Function IsVisible (point As Point, g As Graphics) As Boolean

Parameters

Returns

true when point is contained within this Region; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Remarks

The current transformation of the graphics context is used to compute the region interior and the point coordinates on the drawing surface.

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(System::Drawing::RectangleF rect);

public bool IsVisible (System.Drawing.RectangleF rect);

member this.IsVisible : System.Drawing.RectangleF -> bool

Public Function IsVisible (rect As RectangleF) As Boolean

Parameters

Returns

true when any portion of rect is contained within this Region; otherwise, false.

Examples

The following code example is designed for use with Windows Forms, and it requires PaintEventArgs e, which is a parameter of the Paint event handler. The code performs the following actions:

• Creates the first rectangle and draws it to the screen in blue.

• Creates the second rectangle and draws it to the screen in red.

• Creates a region from the first rectangle.

• Determines if any portion of the rectangle intersects with the region.

• Displays the true or false result on the screen.

Notice that the rectangle intersects the region, so the result is true.

public:
   void IsVisible_RectF_Example( PaintEventArgs^ e )
   {
      // Create the first rectangle and draw it to the screen in blue.
      Rectangle regionRect = Rectangle(20,20,100,100);
      e->Graphics->DrawRectangle( Pens::Blue, regionRect );

      // Create the second rectangle and draw it to the screen in red.
      RectangleF myRect = RectangleF(90,30,100,100);
      e->Graphics->DrawRectangle( Pens::Red, Rectangle::Round( myRect ) );

      // Create a region using the first rectangle.
      System::Drawing::Region^ myRegion = gcnew System::Drawing::Region( regionRect );

      // Determine if myRect is contained in the region.
      bool contained = myRegion->IsVisible( myRect );

      // Display the result.
      System::Drawing::Font^ myFont = gcnew System::Drawing::Font( "Arial",8 );
      SolidBrush^ myBrush = gcnew SolidBrush( Color::Black );
      e->Graphics->DrawString( String::Format( "contained = {0}", contained ), myFont, myBrush, PointF(20,140) );
   }

public void IsVisible_RectF_Example(PaintEventArgs e)
{
             
    // Create the first rectangle and draw it to the screen in blue.
    Rectangle regionRect = new Rectangle(20, 20, 100, 100);
    e.Graphics.DrawRectangle(Pens.Blue, regionRect);
             
    // Create the second rectangle and draw it to the screen in red.
    RectangleF myRect = new RectangleF(90, 30, 100, 100);
    e.Graphics.DrawRectangle(Pens.Red, Rectangle.Round(myRect));
             
    // Create a region using the first rectangle.
    Region myRegion = new Region(regionRect);
             
    // Determine if myRect is contained in the region.
    bool contained = myRegion.IsVisible(myRect);
             
    // Display the result.
    Font myFont = new Font("Arial", 8);
    SolidBrush myBrush = new SolidBrush(Color.Black);
    e.Graphics.DrawString("contained = " + contained.ToString(),
        myFont,
        myBrush,
        new PointF(20, 140));
}

Public Sub IsVisible_RectF_Example(ByVal e As PaintEventArgs)

    ' Create the first rectangle and draw it to the screen in blue.
    Dim regionRect As New Rectangle(20, 20, 100, 100)
    e.Graphics.DrawRectangle(Pens.Blue, regionRect)

    ' create the second rectangle and draw it to the screen in red.
    Dim myRect As New RectangleF(90, 30, 100, 100)
    e.Graphics.DrawRectangle(Pens.Red, Rectangle.Round(myRect))

    ' Create a region using the first rectangle.
    Dim myRegion As New [Region](regionRect)

    ' Determine if myRect is contained in the region.
    Dim contained As Boolean = myRegion.IsVisible(myRect)

    ' Display the result.
    Dim myFont As New Font("Arial", 8)
    Dim myBrush As New SolidBrush(Color.Black)
    e.Graphics.DrawString("contained = " & contained.ToString(), _
    myFont, myBrush, New PointF(20, 140))
End Sub

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(System::Drawing::Rectangle rect);

public bool IsVisible (System.Drawing.Rectangle rect);

member this.IsVisible : System.Drawing.Rectangle -> bool

Public Function IsVisible (rect As Rectangle) As Boolean

Parameters

Returns

This method returns true when any portion of rect is contained within this Region; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(System::Drawing::PointF point);

public bool IsVisible (System.Drawing.PointF point);

member this.IsVisible : System.Drawing.PointF -> bool

Public Function IsVisible (point As PointF) As Boolean

Parameters

Returns

true when point is contained within this Region; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Source:

Region.cs

Source:

Region.cs

public:
 bool IsVisible(System::Drawing::RectangleF rect, System::Drawing::Graphics ^ g);

public bool IsVisible (System.Drawing.RectangleF rect, System.Drawing.Graphics? g);

public bool IsVisible (System.Drawing.RectangleF rect, System.Drawing.Graphics g);

member this.IsVisible : System.Drawing.RectangleF * System.Drawing.Graphics -> bool

Public Function IsVisible (rect As RectangleF, g As Graphics) As Boolean

Parameters

Returns

true when rect is contained within this Region; otherwise, false.

Examples

For a code example, see the IsVisible(RectangleF) method.

Remarks

The current transformation of the graphics context is used to compute the region interior and the rectangle coordinates on the drawing surface.