RectangleF.cs :  » 2.6.4-mono-.net-core » System.Drawing » System » Drawing » C# / CSharp Open Source

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C# / CSharp Open Source » 2.6.4 mono .net core » System.Drawing 
System.Drawing » System » Drawing » RectangleF.cs
//
// System.Drawing.RectangleF.cs
//
// Author:
//   Mike Kestner (mkestner@speakeasy.net)
//
// Copyright (C) 2001 Mike Kestner
// Copyright (C) 2004, 2007 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;
using System.ComponentModel;

namespace System.Drawing{
  [Serializable]
  public struct RectangleF
  {
                private float x, y, width, height;

    /// <summary>
    ///  Empty Shared Field
    /// </summary>
    ///
    /// <remarks>
    ///  An uninitialized RectangleF Structure.
    /// </remarks>
    
    public static readonly RectangleF Empty;

#if TARGET_JVM
    internal java.awt.geom.Rectangle2D NativeObject {
      get {
        return new java.awt.geom.Rectangle2D.Float(X,Y,Width,Height);
      }
    }
#endif

    /// <summary>
    ///  FromLTRB Shared Method
    /// </summary>
    ///
    /// <remarks>
    ///  Produces a RectangleF structure from left, top, right,
    ///  and bottom coordinates.
    /// </remarks>
    
    public static RectangleF FromLTRB (float left, float top,
               float right, float bottom)
    {
      return new RectangleF (left, top, right - left, bottom - top);
    }

    /// <summary>
    ///  Inflate Shared Method
    /// </summary>
    ///
    /// <remarks>
    ///  Produces a new RectangleF by inflating an existing 
    ///  RectangleF by the specified coordinate values.
    /// </remarks>
    
    public static RectangleF Inflate (RectangleF rect, 
              float x, float y)
    {
      RectangleF ir = new RectangleF (rect.X, rect.Y, rect.Width, rect.Height);
      ir.Inflate (x, y);
      return ir;
    }

    /// <summary>
    ///  Inflate Method
    /// </summary>
    ///
    /// <remarks>
    ///  Inflates the RectangleF by a specified width and height.
    /// </remarks>
    
    public void Inflate (float x, float y)
    {
      Inflate (new SizeF (x, y));
    }

    /// <summary>
    ///  Inflate Method
    /// </summary>
    ///
    /// <remarks>
    ///  Inflates the RectangleF by a specified Size.
    /// </remarks>
    
    public void Inflate (SizeF size)
    {
                        x -= size.Width;
                        y -= size.Height;
                        width += size.Width * 2;
                        height += size.Height * 2;                        
    }

    /// <summary>
    ///  Intersect Shared Method
    /// </summary>
    ///
    /// <remarks>
    ///  Produces a new RectangleF by intersecting 2 existing 
    ///  RectangleFs. Returns null if there is no intersection.
    /// </remarks>
    
    public static RectangleF Intersect (RectangleF a, 
                RectangleF b)
    {
      // MS.NET returns a non-empty rectangle if the two rectangles
      // touch each other
      if (!a.IntersectsWithInclusive (b))
        return Empty;

      return FromLTRB (
        Math.Max (a.Left, b.Left),
        Math.Max (a.Top, b.Top),
        Math.Min (a.Right, b.Right),
        Math.Min (a.Bottom, b.Bottom));
    }

    /// <summary>
    ///  Intersect Method
    /// </summary>
    ///
    /// <remarks>
    ///  Replaces the RectangleF with the intersection of itself
    ///  and another RectangleF.
    /// </remarks>
    
    public void Intersect (RectangleF rect)
    {
      this = RectangleF.Intersect (this, rect);
    }

    /// <summary>
    ///  Union Shared Method
    /// </summary>
    ///
    /// <remarks>
    ///  Produces a new RectangleF from the union of 2 existing 
    ///  RectangleFs.
    /// </remarks>
    
    public static RectangleF Union (RectangleF a, RectangleF b)
    {
      return FromLTRB (Math.Min (a.Left, b.Left),
           Math.Min (a.Top, b.Top),
           Math.Max (a.Right, b.Right),
           Math.Max (a.Bottom, b.Bottom));
    }

    /// <summary>
    ///  Equality Operator
    /// </summary>
    ///
    /// <remarks>
    ///  Compares two RectangleF objects. The return value is
    ///  based on the equivalence of the Location and Size 
    ///  properties of the two RectangleFs.
    /// </remarks>

    public static bool operator == (RectangleF left, RectangleF right)
    {
      return (left.X == right.X) && (left.Y == right.Y) &&
                                (left.Width == right.Width) && (left.Height == right.Height);
    }
    
    /// <summary>
    ///  Inequality Operator
    /// </summary>
    ///
    /// <remarks>
    ///  Compares two RectangleF objects. The return value is
    ///  based on the equivalence of the Location and Size 
    ///  properties of the two RectangleFs.
    /// </remarks>

    public static bool operator != (RectangleF left, RectangleF right)
    {
      return (left.X != right.X) || (left.Y != right.Y) ||
                                (left.Width != right.Width) || (left.Height != right.Height);
    }
    
    /// <summary>
    ///  Rectangle to RectangleF Conversion
    /// </summary>
    ///
    /// <remarks>
    ///  Converts a Rectangle object to a RectangleF.
    /// </remarks>

    public static implicit operator RectangleF (Rectangle r)
    {
      return new RectangleF (r.X, r.Y, r.Width, r.Height);
    }
    

    // -----------------------
    // Public Constructors
    // -----------------------

    /// <summary>
    ///  RectangleF Constructor
    /// </summary>
    ///
    /// <remarks>
    ///  Creates a RectangleF from PointF and SizeF values.
    /// </remarks>
    
    public RectangleF (PointF location, SizeF size)
    {
      x = location.X;
                        y = location.Y;
                        width = size.Width;
                        height = size.Height;
    }

    /// <summary>
    ///  RectangleF Constructor
    /// </summary>
    ///
    /// <remarks>
    ///  Creates a RectangleF from a specified x,y location and
    ///  width and height values.
    /// </remarks>
    
    public RectangleF (float x, float y, float width, float height)
    {
      this.x = x;
                        this.y = y;
                        this.width = width;
                        this.height = height;
    }


#if TARGET_JVM
    internal RectangleF (java.awt.geom.RectangularShape r2d) {
      this.x = (float) r2d.getX ();
      this.y = (float) r2d.getY ();
      this.width = (float) r2d.getWidth ();
      this.height = (float) r2d.getHeight ();
    }
#endif

    /// <summary>
    ///  Bottom Property
    /// </summary>
    ///
    /// <remarks>
    ///  The Y coordinate of the bottom edge of the RectangleF.
    ///  Read only.
    /// </remarks>
    
    [Browsable (false)]
    public float Bottom {
      get {
        return Y + Height;
      }
    }

    /// <summary>
    ///  Height Property
    /// </summary>
    ///
    /// <remarks>
    ///  The Height of the RectangleF.
    /// </remarks>
    
    public float Height {
      get {
        return height;
      }
      set {
        height = value;
      }
    }

    /// <summary>
    ///  IsEmpty Property
    /// </summary>
    ///
    /// <remarks>
    ///  Indicates if the width or height are zero. Read only.
    /// </remarks>
    //    
    [Browsable (false)]
    public bool IsEmpty {
      get {
        return (width <= 0 || height <= 0);
      }
    }

    /// <summary>
    ///  Left Property
    /// </summary>
    ///
    /// <remarks>
    ///  The X coordinate of the left edge of the RectangleF.
    ///  Read only.
    /// </remarks>
    
    [Browsable (false)]
    public float Left {
      get {
        return X;
      }
    }

    /// <summary>
    ///  Location Property
    /// </summary>
    ///
    /// <remarks>
    ///  The Location of the top-left corner of the RectangleF.
    /// </remarks>
    
    [Browsable (false)]
    public PointF Location {
      get {
        return new PointF (x, y);
      }
      set {
        x = value.X;
                                y = value.Y;
      }
    }

    /// <summary>
    ///  Right Property
    /// </summary>
    ///
    /// <remarks>
    ///  The X coordinate of the right edge of the RectangleF.
    ///  Read only.
    /// </remarks>
    
    [Browsable (false)]
    public float Right {
      get {
        return X + Width;
      }
    }

    /// <summary>
    ///  Size Property
    /// </summary>
    ///
    /// <remarks>
    ///  The Size of the RectangleF.
    /// </remarks>
    
    [Browsable (false)]
    public SizeF Size {
      get {
        return new SizeF (width, height);
      }
      set {
        width = value.Width;
                                height = value.Height;
      }
    }

    /// <summary>
    ///  Top Property
    /// </summary>
    ///
    /// <remarks>
    ///  The Y coordinate of the top edge of the RectangleF.
    ///  Read only.
    /// </remarks>
    
    [Browsable (false)]
    public float Top {
      get {
        return Y;
      }
    }

    /// <summary>
    ///  Width Property
    /// </summary>
    ///
    /// <remarks>
    ///  The Width of the RectangleF.
    /// </remarks>
    
    public float Width {
      get {
        return width;
      }
      set {
        width = value;
      }
    }

    /// <summary>
    ///  X Property
    /// </summary>
    ///
    /// <remarks>
    ///  The X coordinate of the RectangleF.
    /// </remarks>
    
    public float X {
      get {
        return x;
      }
      set {
        x = value;
      }
    }

    /// <summary>
    ///  Y Property
    /// </summary>
    ///
    /// <remarks>
    ///  The Y coordinate of the RectangleF.
    /// </remarks>
    
    public float Y {
      get {
        return y;
      }
      set {
        y = value;
      }
    }

    /// <summary>
    ///  Contains Method
    /// </summary>
    ///
    /// <remarks>
    ///  Checks if an x,y coordinate lies within this RectangleF.
    /// </remarks>
    
    public bool Contains (float x, float y)
    {
      return ((x >= Left) && (x < Right) && 
        (y >= Top) && (y < Bottom));
    }

    /// <summary>
    ///  Contains Method
    /// </summary>
    ///
    /// <remarks>
    ///  Checks if a Point lies within this RectangleF.
    /// </remarks>
    
    public bool Contains (PointF pt)
    {
      return Contains (pt.X, pt.Y);
    }

    /// <summary>
    ///  Contains Method
    /// </summary>
    ///
    /// <remarks>
    ///  Checks if a RectangleF lies entirely within this 
    ///  RectangleF.
    /// </remarks>
    
    public bool Contains (RectangleF rect)
    {
      return (rect == Intersect (this, rect));
    }

    /// <summary>
    ///  Equals Method
    /// </summary>
    ///
    /// <remarks>
    ///  Checks equivalence of this RectangleF and an object.
    /// </remarks>
    
    public override bool Equals (object obj)
    {
      if (!(obj is RectangleF))
        return false;

      return (this == (RectangleF) obj);
    }

    /// <summary>
    ///  GetHashCode Method
    /// </summary>
    ///
    /// <remarks>
    ///  Calculates a hashing value.
    /// </remarks>
    
    public override int GetHashCode ()
    {
      return (int) (x + y + width + height);
    }

    /// <summary>
    ///  IntersectsWith Method
    /// </summary>
    ///
    /// <remarks>
    ///  Checks if a RectangleF intersects with this one.
    /// </remarks>

    public bool IntersectsWith (RectangleF rect)
    {
      return !((Left >= rect.Right) || (Right <= rect.Left) ||
          (Top >= rect.Bottom) || (Bottom <= rect.Top));
    }

    private bool IntersectsWithInclusive (RectangleF r)
    {
      return !((Left > r.Right) || (Right < r.Left) ||
          (Top > r.Bottom) || (Bottom < r.Top));
    }

    /// <summary>
    ///  Offset Method
    /// </summary>
    ///
    /// <remarks>
    ///  Moves the RectangleF a specified distance.
    /// </remarks>

    public void Offset (float x, float y)
    {
      X += x;
      Y += y;
    }
    
    /// <summary>
    ///  Offset Method
    /// </summary>
    ///
    /// <remarks>
    ///  Moves the RectangleF a specified distance.
    /// </remarks>

    public void Offset (PointF pos)
    {
      Offset (pos.X, pos.Y);
    }
    
    /// <summary>
    ///  ToString Method
    /// </summary>
    ///
    /// <remarks>
    ///  Formats the RectangleF in (x,y,w,h) notation.
    /// </remarks>
    
    public override string ToString ()
    {
      return String.Format ("{{X={0},Y={1},Width={2},Height={3}}}",
             x, y, width, height);
    }

  }
}
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