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

//
// GridLength.cs
//
// Contact:
//   Moonlight List (moonlight-list@lists.ximian.com)
//
// Copyright 2008 Novell, Inc.
//
// 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.Runtime.InteropServices;

namespace System.Windows{

  [StructLayout (LayoutKind.Sequential)]
  public struct GridLength {
    double val;
    GridUnitType type;
    
    static GridLength auto = new GridLength ();
    

    public GridLength (double pixels) :
      this (pixels, GridUnitType.Pixel)
    {
    }

    public GridLength (double value, GridUnitType type)
    {
      if ((value < 0.0d) || Double.IsNaN (value) || Double.IsInfinity (value))
        throw new ArgumentException ("Invalid value", "value");
      if ((type < GridUnitType.Auto) || (type > GridUnitType.Star))
        throw new ArgumentException ("Invalid value", "type");

      val = value;
      this.type = type;
    }

    public double Value {
      get {
        return IsAuto ? 1.0d : val;
      }
    }

    public GridUnitType GridUnitType {
      get {
        return type;
      }
    }
    
    public bool IsStar {
      get {
        return GridUnitType == GridUnitType.Star;
      }
    }

    public bool IsAuto {
      get {
        return GridUnitType == GridUnitType.Auto;
      }
    }

    public bool IsAbsolute {
      get {
        return GridUnitType == GridUnitType.Pixel;
      }
    }

    public static GridLength Auto {
      get {
        return auto;
      }
    }
    
    public override bool Equals (object oCompare)
    {
      if (oCompare == null)
        return false;
      
      if (!(oCompare is GridLength))
        return false;
      
      return this == (GridLength) oCompare;
    }
    
    public bool Equals (GridLength gridLength)
    {
      return this == gridLength;
    }
    
    public static bool operator == (GridLength gl1, GridLength gl2)
    {
      return ((gl1.IsAuto && gl2.IsAuto) ||
        (gl1.val == gl2.val &&
         gl1.type == gl2.type));
    }
    
    public static bool operator != (GridLength gl1, GridLength gl2)
    {
      return !(gl1 == gl2);
    }
    
    public override int GetHashCode()
    {
      return val.GetHashCode () ^ type.GetHashCode ();
    }
    
    public override string ToString ()
    {
      if (IsAuto)
        return "Auto";

      string s = val.ToString ();
      return IsStar ? s + "*" : s;
    }
  }
}