finalcut/include/final/fobject.h

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/***********************************************************************
* fobject.h - Object container base class of all widget objects *
* *
* This file is part of the Final Cut widget toolkit *
* *
* Copyright 2015-2017 Markus Gans *
* *
* The Final Cut 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 3 of *
* the License, or (at your option) any later version. *
* *
* The Final Cut 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, see *
* <http://www.gnu.org/licenses/>. *
***********************************************************************/
/* Base class
*
*
*
* FObject
*
*/
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#ifndef FOBJECT_H
#define FOBJECT_H
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#if !defined (USE_FINAL_H) && !defined (COMPILE_FINAL_CUT)
#error "Only <final/final.h> can be included directly."
#endif
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#include <sys/time.h> // need for gettimeofday
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#include <cstdlib>
#include <cstring>
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#include <list>
#include <vector>
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#include "final/emptyfstring.h"
#include "final/fc.h"
#include "final/fevent.h"
#include "final/ftypes.h"
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//----------------------------------------------------------------------
// class FObject
//----------------------------------------------------------------------
#pragma pack(push)
#pragma pack(1)
class FObject
{
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public:
// Typedef
typedef std::list<FObject*> FObjectList;
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typedef FObjectList::iterator FObjectIterator;
typedef FObjectList::const_iterator constFObjectIterator;
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// Constructor
explicit FObject (FObject* = 0);
// Destructor
virtual ~FObject();
// Accessors
virtual const char* getClassName() const;
FObject* getParent() const;
FObject* getChild (int) const;
const FObjectList& getChildren() const;
int numOfChildren() const;
FObjectIterator begin();
FObjectIterator end();
constFObjectIterator begin() const;
constFObjectIterator end() const;
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// Inquiries
bool hasParent() const;
bool hasChildren() const;
bool isChild (FObject*) const;
bool isDirectChild (FObject*) const;
bool isWidget() const;
bool isInstanceOf (const char[]) const;
bool isTimerInUpdating() const;
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// Methods
void removeParent();
void addChild (FObject*);
void delChild (FObject*);
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// Timer methods
static void getCurrentTime (timeval*);
int addTimer (int);
bool delTimer (int);
bool delOwnTimer();
bool delAllTimer();
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protected:
struct timer_data
{
int id;
timeval interval;
timeval timeout;
FObject* object;
};
// Typedef
typedef std::vector<timer_data> TimerList;
// Event handler
virtual bool event (FEvent*);
virtual void onTimer (FTimerEvent*);
// Data Members
static TimerList* timer_list;
bool widget_object;
private:
// Disable copy constructor
FObject (const FObject&);
// Disable assignment operator (=)
FObject& operator = (const FObject&);
// Data Members
FObject* parent_obj;
FObjectList children_list;
bool has_parent;
static bool timer_modify_lock;
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};
#pragma pack(pop)
//----------------------------------------------------------------------
inline const char* FObject::getClassName() const
{ return "FObject"; }
//----------------------------------------------------------------------
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inline FObject* FObject::getParent() const
{ return parent_obj; }
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//----------------------------------------------------------------------
inline const FObject::FObjectList& FObject::getChildren() const
{ return children_list; }
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//----------------------------------------------------------------------
inline int FObject::numOfChildren() const
{ return int(children_list.size()); }
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//----------------------------------------------------------------------
inline FObject::FObjectIterator FObject::begin()
{ return children_list.begin(); }
//----------------------------------------------------------------------
inline FObject::FObjectIterator FObject::end()
{ return children_list.end(); }
//----------------------------------------------------------------------
inline FObject::constFObjectIterator FObject::begin() const
{ return children_list.begin(); }
//----------------------------------------------------------------------
inline FObject::constFObjectIterator FObject::end() const
{ return children_list.end(); }
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//----------------------------------------------------------------------
inline bool FObject::hasParent() const
{ return has_parent; }
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//----------------------------------------------------------------------
inline bool FObject::hasChildren() const
{ return bool( ! children_list.empty() ); }
//----------------------------------------------------------------------
inline bool FObject::isDirectChild (FObject* obj) const
{ return bool( obj->getParent() == this ); }
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//----------------------------------------------------------------------
inline bool FObject::isWidget() const
{ return widget_object; }
//----------------------------------------------------------------------
inline bool FObject::isInstanceOf (const char classname[]) const
{ return ( classname ) ? bool(strcmp(classname, getClassName()) == 0) : false; }
//----------------------------------------------------------------------
inline bool FObject::isTimerInUpdating() const
{ return timer_modify_lock; }
//----------------------------------------------------------------------
inline void FObject::removeParent()
{
parent_obj = 0;
has_parent = false;
}
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//----------------------------------------------------------------------
// Operator functions for timeval
//----------------------------------------------------------------------
static inline timeval operator + (const timeval& t1, const timeval& t2)
{
timeval tmp;
tmp.tv_sec = t1.tv_sec + t2.tv_sec;
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if ( (tmp.tv_usec = t1.tv_usec + t2.tv_usec) >= 1000000 )
{
tmp.tv_sec++;
tmp.tv_usec -= 1000000;
}
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return tmp;
}
//----------------------------------------------------------------------
static inline timeval operator - (const timeval& t1, const timeval& t2)
{
timeval tmp;
tmp.tv_sec = t1.tv_sec - t2.tv_sec;
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if ( (tmp.tv_usec = t1.tv_usec - t2.tv_usec) < 0 )
{
tmp.tv_sec--;
tmp.tv_usec += 1000000;
}
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return tmp;
}
//----------------------------------------------------------------------
static inline timeval& operator += (timeval& t1, const timeval& t2)
{
t1.tv_sec += t2.tv_sec;
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if ( (t1.tv_usec += t2.tv_usec) >= 1000000 )
{
t1.tv_sec++;
t1.tv_usec -= 1000000;
}
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return t1;
}
//----------------------------------------------------------------------
static inline bool operator < (const timeval& t1, const timeval& t2)
{
return (t1.tv_sec < t2.tv_sec)
|| (t1.tv_sec == t2.tv_sec && t1.tv_usec < t2.tv_usec);
}
#endif // FOBJECT_H