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/*
Cassowary.net: an incremental constraint solver for .NET
(http://lumumba.uhasselt.be/jo/projects/cassowary.net/)
Copyright (C) 2005 Jo Vermeulen (jo.vermeulen@uhasselt.be)
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation; either version 2.1
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
using System;
namespace Cassowary
{
public abstract class ClConstraint
{
public ClConstraint(ClStrength strength, double weight)
{
_strength = strength;
_weight = weight;
}
public ClConstraint(ClStrength strength)
{
_strength = strength;
_weight = 1.0;
}
public ClConstraint()
{
_strength = ClStrength.Required;
_weight = 1.0;
}
public abstract ClLinearExpression Expression
{
get;
}
public virtual bool IsEditConstraint
{
get { return false; }
}
public virtual bool IsInequality
{
get { return false; }
}
public virtual bool IsRequired
{
get { return _strength.IsRequired; }
}
public virtual bool IsStayConstraint
{
get { return false; }
}
public ClStrength Strength
{
get { return _strength; }
set { _strength = value; }
}
public double Weight
{
get { return _weight; }
set { _weight = value; }
}
public object AttachedObject
{
get { return _attachedObject; }
set { _attachedObject = value; }
}
public override string ToString()
{
// two curly brackets escape the format, so use three to surround
// a format expression in brackets!
//
// example output: weak:[0,0,1] {1} (23 + -1*[update.height:23]
return string.Format("{0} {{{1}}} ({2}", Strength, Weight, Expression);
}
private ClStrength _strength;
private double _weight;
private object _attachedObject;
}
}
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