source: cpp/gdk/param.h @ 88

// This file is a part of the Framsticks GDK library.
// Copyright (C) 2002-2011  Szymon Ulatowski.  See LICENSE.txt for details.
// Refer to http://www.framsticks.com/ for further information.

#ifndef _PARAM_H_
#define _PARAM_H_

#include <stdio.h>
#include "sstring.h"
#include "list.h"
#include "statrick.h"
#include "virtfile.h"

class ExtValue;
class ExtObject;

// ParamInterface flags:
#define PARAM_READONLY  1
#define PARAM_DONTSAVE  2
#define PARAM_SETLEVEL(x) (((x)&3)<<2)
#define PARAM_LEVEL(x) (((x)>>2)&3)
#define PARAM_USERREADONLY 16
#define PARAM_USERHIDDEN 32
// for mutableparam (private!)
#define MUTPARAM_ALLOCENTRY 64
#define MUTPARAM_ALLOCDATA 128
#define PARAM_NOSTATIC 256
#define PARAM_CONST 512
#define PARAM_CANOMITNAME 1024
#define PARAM_DONTLOAD  2048

// wynik z param::set() to kombinacja bitow:

#define PSET_RONLY      1
// oznacza,ze nie mozna zmienic

#define PSET_CHANGED    2
// zaawansowane: wartosc zostala zmieniona

#define PSET_HITMIN     4
#define PSET_HITMAX     8
// wartosc zostala dopasowana do min lub max

#define PSET_WARN (PSET_RONLY | PSET_HITMIN | PSET_HITMAX)
// pozyteczna kombinacja - oznacza, ze nalezy pobrac i wyswietlic
// wartosc, zeby uzytkownik wiedzial, ze jego propozycja jest odrzucona

#define PSET_NOPROPERTY 16

/** Property get/set interface - runtime access to named properties */
class ParamInterface
{
public:
virtual int getGroupCount()=0; ///< @return number of property groups
virtual int getPropCount()=0; ///< @return number of properties

virtual const char* getName()=0;
virtual const char* getDescription() {return 0;}

int findId(const char *n);      ///< find id number for internal name
int findIdn(const char *naz,int n);

virtual const char *id(int i)=0;        ///< get internal name
virtual const char *name(int i)=0;      ///< get human readable name

/** get type description.
    first character defines basic datatype:
    - d = integer
    - f = floating point
    - s = string
    - o = ExtObject
    - x = ExtValue (universal datatype)
 */
virtual const char *type(int i)=0;      

virtual const char *help(int i)=0;      ///< get long description (tooltip)

virtual int flags(int i)=0;             ///< get flags

virtual int group(int i)=0;             ///< get group id for a property
virtual const char *grname(int gi)=0;   ///< get group name
virtual int grmember(int gi,int n)=0;   ///< get property id for n'th member of group "gi"

virtual void call(int i,ExtValue* args,ExtValue *ret)=0;

void get(int,ExtValue &retval); ///< most universal get, can be used for every datatype

virtual SString getString(int)=0;       ///< get string value, you can only use this for "s" type property
virtual long getInt(int)=0;     ///< get long value, you can only use this for "d" type property
virtual double getDouble(int)=0;        ///< get double value, you can only use this for "f" type property
virtual ExtObject getObject(int)=0;     ///< get object reference, you can only use this for "o" type property
virtual ExtValue getExtValue(int)=0;    ///< get extvalue object, you can only use this for "x" type property

SString get(int);               ///< old style get, can convert long or double to string
SString getText(int);           ///< like getString, returns enumeration label for subtype "d 0 n ~enum1~enum2...

SString getStringById(const char*prop);  ///< get string value, you can only use this for "s" type property
long getIntById(const char* prop);    ///< get long value, you can only use this for "d" type property
double getDoubleById(const char* prop);///< get double value, you can only use this for "f" type property
ExtObject getObjectById(const char* prop);///< get object reference, you can only use this for "o" type property
ExtValue getExtValueById(const char* prop);///< get extvalue object, you can only use this for "x" type property
ExtValue getById(const char* prop);

int setInt(int i,const char* str);
int setDouble(int i,const char* str);
virtual int setInt(int,long)=0;         ///< set long value, you can only use this for "d" type prop
virtual int setDouble(int,double)=0;    ///< set double value, you can only use this for "f" type prop
virtual int setString(int,const SString &)=0;   ///< set string value, you can only use this for "s" type prop
virtual int setObject(int,const ExtObject &)=0;         ///< set object reference, you can only use this for "o" type prop
virtual int setExtValue(int,const ExtValue &)=0;        ///< 4 in 1

int set(int,const ExtValue &);///< most universal set, can be used for every datatype

int set(int,const char*);               ///< oldstyle set, can convert string to long or double

int setIntById(const char* prop,long);///< set long value, you can only use this for "d" type prop
int setDoubleById(const char* prop,double);///< set double value, you can only use this for "f" type prop
int setStringById(const char* prop,const SString &);///< set string value, you can only use this for "s" type prop
int setObjectById(const char* prop,const ExtObject &);///< set object reference, you can only use this for "o" type prop

int setExtValueById(const char* prop,const ExtValue &); ///< 4 in 1

/** get valid minimum, maximum and default value for property 'prop'
    @return 0 if min/max/def information is not available */
int getMinMax(int prop,long& minumum,long& maximum,long& def);
/** get valid minimum, maximum and default value for property 'prop'
    @return 0 if min/max/def information is not available */
int getMinMax(int prop,double& minumum,double& maximum,double& def);

virtual void setDefault(bool numericonly=false);
virtual void setDefault(int i,bool numericonly=false);
void setMin();
void setMax();
void setMin(int i);
void setMax(int i);

/** copy all property values from other ParamInterface object */
void copyFrom(ParamInterface *src);

/** copy all property values from compatible ParamInterface object.
    this method is more efficient than copyFrom,
    but can be used only if the other object has the same properties sequence, eg:
    - any two Param objects having common paramtab
    - any ParamInterface object and the Param with paramtab constructed by ParamObject::makeParamTab
 */
void quickCopyFrom(ParamInterface *src);

int save(VirtFILE*,const SString* altname=0,bool force=0);
int saveprop(VirtFILE*,int i,const char* p,bool force=0);
void load(VirtFILE*);
void load2(const SString &,int &);
};

// implementations:

extern char MakeCodeGuardHappy;

#define PROCOFFSET(_proc_) ( (void (*)(void*,ExtValue*,ExtValue*)) &(FIELDSTRUCT :: _proc_ ## _statrick))
#define STATICPROCOFFSET(_proc_) ( (void (*)(void*,ExtValue*,ExtValue*)) &(FIELDSTRUCT :: _proc_))
#define GETOFFSET(_proc_) ( (void (*)(void*,ExtValue*)) &(FIELDSTRUCT :: _proc_ ## _statrick))
#define SETOFFSET(_proc_) ( (int (*)(void*,const ExtValue*)) &(FIELDSTRUCT :: _proc_ ## _statrick))

#define FIELDOFFSET(_fld_) ((long)((char*)(&((FIELDSTRUCT*)&MakeCodeGuardHappy)->_fld_)-((char*)((FIELDSTRUCT*)&MakeCodeGuardHappy))))

#define FIELD(_fld_) FIELDOFFSET(_fld_),0,0
#define LONGOFFSET(_o_) (_o_),0,0
#define PROCEDURE(_proc_) 0,(void*)PROCOFFSET(_proc_),0
#define STATICPROCEDURE(_proc_) 0,(void*)STATICPROCOFFSET(_proc_),0
#define GETSET(_proc_) 0,(void*)GETOFFSET(get_ ## _proc_),(void*)SETOFFSET(set_ ## _proc_)
#define GETFIELD(_proc_) FIELDOFFSET(_proc_),(void*)GETOFFSET(get_ ## _proc_),0
#define SETFIELD(_proc_) FIELDOFFSET(_proc_),0,(void*)SETOFFSET(set_ ## _proc_)
#define GETONLY(_proc_) 0,(void*)GETOFFSET(get_ ## _proc_),0
#define SETONLY(_proc_) 0,0,(void*)SETOFFSET(set_ ## _proc_)

#define PARAMPROCARGS ExtValue* args,ExtValue* ret
#define PARAMSETARGS const ExtValue* arg
#define PARAMGETARGS ExtValue* ret

#define PARAMPROCDEF(name) STATRICKDEF2(name,ExtValue*,ExtValue*)
#define PARAMGETDEF(name) STATRICKDEF1(get_ ## name,ExtValue*)
#define PARAMSETDEF(name) STATRICKRDEF1(int,set_ ## name,const ExtValue*)

///////////////////////////////

struct ParamEntry
{
const char *id;
short group,flags;
const char *name,*type;
long offset;
void *fun1; ///< procedure or get
void *fun2; ///< set
const char *help;
};

struct ParamEntryConstructor: public ParamEntry
{
public:
ParamEntryConstructor(const char *_id,short _group=0,short _flags=0,const char *_name=0,const char *_type=0,long _offset=0,void *_fun1=0, void *_fun2=0, const char *_help=0)
{id=_id;group=_group;flags=_flags;name=_name;type=_type;offset=_offset;fun1=_fun1;fun2=_fun2;help=_help;}
};

class SimpleAbstractParam: public virtual ParamInterface
{
protected:
virtual void *getTarget(int i);
virtual ParamEntry *entry(int i)=0;
const char* myname;
bool dontcheckchanges;

public:
void *object;

const char* getName() {return myname;}
void setName(const char* n) {myname=n;}

/**
        @param t ParamEntry table
        @param o controlled object
        @param n Param's name
*/
SimpleAbstractParam(void* o=0,const char*n=0):object(o),myname(n),dontcheckchanges(0) {}

void select(void *o) {object=o;}
void* getSelected() {return object;}

const char *id(int i) {return (i>=getPropCount())?0:entry(i)->id;}
const char *name(int i) {return entry(i)->name;}
const char *type(int i) {return entry(i)->type;}
const char *help(int i) {return entry(i)->help;}
int flags(int i) {return entry(i)->flags;}
int group(int i) {return entry(i)->group;}
void call(int i,ExtValue* args,ExtValue *ret);

SString getString(int);
long getInt(int);
double getDouble(int);
ExtObject getObject(int);
ExtValue getExtValue(int);

int setInt(int,long);
int setDouble(int,double);
int setString(int,const SString &);
int setObject(int,const ExtObject &);
int setExtValue(int,const ExtValue &);

int isequal(int i,void* defdata);
void save2(SString&,void *defdata,bool addcr=true,bool all_names=true);

virtual void setDefault(bool numericonly=false);
virtual void setDefault(int i,bool numericonly=false);
};

class Param: public SimpleAbstractParam
{
protected:
ParamEntry *entry(int i) {return tab+tab[0].group+i;}
public:
ParamEntry *tab;
/**
        @param t ParamEntry table
        @param o controlled object
        @param n Param's name
*/

Param(ParamEntry *t=0,void* o=0,const char*n=0):SimpleAbstractParam(o,n),tab(t)
{if (!n&&tab) myname=tab[0].name;}

const char* getDescription() {return tab[0].type;}

int getGroupCount() {return tab[0].group;}
int getPropCount() {return tab[0].flags;}
const char *grname(int i) {return (i<getGroupCount())?tab[i].id:0;}
int grmember(int,int);
void setParamTab(ParamEntry *t,int dontupdatename=0) {tab=t; if ((!dontupdatename)&&tab) myname=tab[0].name; }
ParamEntry *getParamTab() const {return tab;}
};

extern ParamEntry empty_paramtab[];

#endif