1 files changed, 119 insertions, 0 deletions
diff --git a/libs/cassowary/cassowary/ClFloatVariable.h b/libs/cassowary/cassowary/ClFloatVariable.h
new file mode 100644
index 0000000000..4e58036ab7
--- /dev/null
+++ b/libs/cassowary/cassowary/ClFloatVariable.h
@@ -0,0 +1,119 @@
+// $Id$
+//
+// Cassowary Incremental Constraint Solver
+// Original Smalltalk Implementation by Alan Borning
+// This C++ Implementation by Greg J. Badros, <gjb@cs.washington.edu>
+// http://www.cs.washington.edu/homes/gjb
+// (C) 1998, 1999 Greg J. Badros and Alan Borning
+// See ../LICENSE for legal details regarding this software
+//
+// ClFloatVariable.h
+
+#ifndef ClFloatVariable_H
+#define ClFloatVariable_H
+
+#if defined(HAVE_CONFIG_H) && !defined(CONFIG_H_INCLUDED) && !defined(CONFIG_INLINE_H_INCLUDED)
+#include <cassowary/config-inline.h>
+#define CONFIG_INLINE_H_INCLUDED
+#endif
+
+#include <cstdio>
+#include <map>
+#include <string>
+#include "Cassowary.h"
+#include "ClAbstractVariable.h"
+
+using std::map;
+using std::string;
+
+class ClFloatVariable : public ClAbstractVariable {
+public:
+  typedef ClAbstractVariable super;
+
+  ClFloatVariable(string name, Number Value = 0.0) :
+    ClAbstractVariable(name),
+    _value(Value)
+    { }
+
+  ClFloatVariable(Number Value = 0.0) :
+    ClAbstractVariable(""),
+    _value(Value)
+    { }
+
+  ClFloatVariable(long number, char *prefix, Number Value = 0.0) :
+    ClAbstractVariable(number,prefix),
+    _value(Value)
+    { }
+
+  virtual bool IsFloatVariable() const
+    { return true; }
+
+  // Return true if this a dummy variable (used as a marker variable
+  // for required equality constraints).  Such variables aren't
+  // allowed to enter the basis when pivoting.
+  virtual bool IsDummy() const
+    { return false; }
+
+  // Return true if this a variable known outside the solver.  
+  // (We need to give such variables a Value after solving is complete.)
+  virtual bool IsExternal() const
+    { return true; }
+
+  // Return true if we can Pivot on this variable.
+  virtual bool IsPivotable() const
+    { return false; }
+
+  // Return true if this is a restricted (or slack) variable.  Such
+  // variables are constrained to be non-negative and occur only
+  // internally to the simplex solver.
+  virtual bool IsRestricted() const
+    { return false; }
+
+#ifndef CL_NO_IO
+  // Prints a semi-descriptive representation to the stream, using the
+  // name if there is one, and otherwise the hash number of this
+  // object.
+  //	EXAMPLE
+  //	  [x:10.0]		-- name = "x", Value = 10.0
+  virtual ostream &PrintOn(ostream &xo) const;
+#endif
+  
+  // Return the current Value I hold.
+  Number Value() const
+    { return _value; }
+
+  // Round the Value to an integer and return it
+  int IntValue() const
+    { return int(_value + 0.5); }
+
+  // change the Value held -- should *not* use this if the variable is
+  // in a solver -- instead use AddEditVar() and SuggestValue() interface
+  void SetValue(Number Value)
+    { _value = Value; }
+
+  // permit overriding in subclasses in case something needs to be
+  // done when the Value is changed by the solver
+  // may be called when the Value hasn't actually changed -- just 
+  // means the solver is setting the external variable
+  virtual void ChangeValue(Number Value)
+    { _value = Value; }
+
+private:
+
+  // similar to SetValue -- see caveat above -- made private for now
+  // since it's probably the wrong thing and is too easy to invoke
+  Number operator=(Number Value)
+    { _value = Value; return Value; }
+
+  // Copy constructor left undefined since we want to
+  // outlaw passing by Value!  Will get a link error if you
+  // try to use within ClFloatVariable.c, compile-time error everywhere else
+  ClFloatVariable(const ClFloatVariable &);
+
+  Number _value;
+
+};
+
+
+
+#endif