-// condition.hxx - Declarations and inline methods for property conditions.
-// Written by David Megginson, started 2000.
-// CLO May 2003 - Split out condition specific code.
-//
-// This file is in the Public Domain, and comes with no warranty.
+/**
+ * \file condition.hxx
+ * Declarations and inline methods for property conditions.
+ * Written by David Megginson, started 2000.
+ * CLO May 2003 - Split out condition specific code.
+ *
+ * This file is in the Public Domain, and comes with no warranty.
+ */
#ifndef __SG_CONDITION_HXX
#define __SG_CONDITION_HXX
-#include <simgear/debug/logstream.hxx>
-#include <simgear/props/props.hxx>
-#include <simgear/props/props_io.hxx>
+#include <set>
+#include <simgear/structure/SGReferenced.hxx>
+#include <simgear/structure/SGSharedPtr.hxx>
+
+class SGPropertyNode;
-\f
////////////////////////////////////////////////////////////////////////
// Conditions.
////////////////////////////////////////////////////////////////////////
*
* This class should migrate to somewhere more general.
*/
-class FGCondition
+class SGCondition : public SGReferenced
{
public:
- FGCondition ();
- virtual ~FGCondition ();
+ SGCondition ();
+ virtual ~SGCondition ();
virtual bool test () const = 0;
-};
-
-
-/**
- * Condition for a single property.
- *
- * This condition is true only if the property returns a boolean
- * true value.
- */
-class FGPropertyCondition : public FGCondition
-{
-public:
- FGPropertyCondition ( SGPropertyNode *prop_root,
- const char * propname );
- virtual ~FGPropertyCondition ();
- virtual bool test () const { return _node->getBoolValue(); }
-private:
- const SGPropertyNode * _node;
-};
-
-
-/**
- * Condition for a 'not' operator.
- *
- * This condition is true only if the child condition is false.
- */
-class FGNotCondition : public FGCondition
-{
-public:
- // transfer pointer ownership
- FGNotCondition (FGCondition * condition);
- virtual ~FGNotCondition ();
- virtual bool test () const;
-private:
- FGCondition * _condition;
-};
-
-
-/**
- * Condition for an 'and' group.
- *
- * This condition is true only if all of the conditions
- * in the group are true.
- */
-class FGAndCondition : public FGCondition
-{
-public:
- FGAndCondition ();
- virtual ~FGAndCondition ();
- virtual bool test () const;
- // transfer pointer ownership
- virtual void addCondition (FGCondition * condition);
-private:
- vector<FGCondition *> _conditions;
-};
-
-
-/**
- * Condition for an 'or' group.
- *
- * This condition is true if at least one of the conditions in the
- * group is true.
- */
-class FGOrCondition : public FGCondition
-{
-public:
- FGOrCondition ();
- virtual ~FGOrCondition ();
- virtual bool test () const;
- // transfer pointer ownership
- virtual void addCondition (FGCondition * condition);
-private:
- vector<FGCondition *> _conditions;
-};
-
-
-/**
- * Abstract base class for property comparison conditions.
- */
-class FGComparisonCondition : public FGCondition
-{
-public:
- enum Type {
- LESS_THAN,
- GREATER_THAN,
- EQUALS
- };
- FGComparisonCondition (Type type, bool reverse = false);
- virtual ~FGComparisonCondition ();
- virtual bool test () const;
- virtual void setLeftProperty( SGPropertyNode *prop_root,
- const char * propname );
- virtual void setRightProperty( SGPropertyNode *prop_root,
- const char * propname );
- // will make a local copy
- virtual void setRightValue (const SGPropertyNode * value);
-private:
- Type _type;
- bool _reverse;
- const SGPropertyNode * _left_property;
- const SGPropertyNode * _right_property;
- const SGPropertyNode * _right_value;
+ virtual void collectDependentProperties(std::set<const SGPropertyNode*>& props) const { }
};
* invoke the test() method whenever it needs to decide whether to
* active itself, draw itself, and so on.
*/
-class FGConditional
+class SGConditional : public SGReferenced
{
public:
- FGConditional ();
- virtual ~FGConditional ();
+ SGConditional ();
+ virtual ~SGConditional ();
// transfer pointer ownership
- virtual void setCondition (FGCondition * condition);
- virtual const FGCondition * getCondition () const { return _condition; }
+ virtual void setCondition (SGCondition * condition);
+ virtual const SGCondition * getCondition () const { return _condition; }
virtual bool test () const;
private:
- FGCondition * _condition;
+ SGSharedPtr<SGCondition> _condition;
};
* responsibility of the caller to delete the condition when
* it is no longer needed.
*/
-FGCondition * fgReadCondition( SGPropertyNode *prop_root,
- const SGPropertyNode *node );
+SGCondition *sgReadCondition( SGPropertyNode *prop_root,
+ const SGPropertyNode *node );
#endif // __SG_CONDITION_HXX