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fet  5.18.0
Public Member Functions | Public Attributes
ConstraintTeachersMaxHoursContinuously Class Reference

This is a constraint, aimed at obtaining timetables which do not allow more than X hours in a row for any teacher. More...

#include <timeconstraint.h>

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List of all members.

Public Member Functions

 ConstraintTeachersMaxHoursContinuously ()
 ConstraintTeachersMaxHoursContinuously (double wp, int maxhours)
QString getXmlDescription (Rules &r)
 Returns an XML description of this constraint.
bool computeInternalStructure (QWidget *parent, Rules &r)
 Computes the internal structure for this constraint.
bool hasInactiveActivities (Rules &r)
QString getDescription (Rules &r)
 Returns a small description string for this constraint.
QString getDetailedDescription (Rules &r)
 Returns a detailed description string for this constraint.
double fitness (Solution &c, Rules &r, QList< double > &cl, QList< QString > &dl, QString *conflictsString=NULL)
 The function that calculates the fitness of a solution, according to this constraint.
bool isRelatedToActivity (Rules &r, Activity *a)
 Returns true if this constraint is related to this activity.
bool isRelatedToTeacher (Teacher *t)
 Returns true if this constraint is related to this teacher.
bool isRelatedToSubject (Subject *s)
 Returns true if this constraint is related to this subject.
bool isRelatedToActivityTag (ActivityTag *s)
 Returns true if this constraint is related to this activity tag.
bool isRelatedToStudentsSet (Rules &r, StudentsSet *s)
 Returns true if this constraint is related to this students set.
bool hasWrongDayOrHour (Rules &r)
bool canRepairWrongDayOrHour (Rules &r)
bool repairWrongDayOrHour (Rules &r)

Public Attributes

int maxHoursContinuously
 The maximum hours continuously.
double weightPercentage
 The percentage weight of this constraint, 100% compulsory, 0% non-compulsory.
bool active
QString comments
int type
 Specifies the type of this constraint (using the above constants).

Detailed Description

This is a constraint, aimed at obtaining timetables which do not allow more than X hours in a row for any teacher.

Definition at line 820 of file timeconstraint.h.


Constructor & Destructor Documentation

Definition at line 3139 of file timeconstraint.cpp.

 : TimeConstraint(wp)
 {
       assert(maxhours>0);
       this->maxHoursContinuously=maxhours;

       this->type=CONSTRAINT_TEACHERS_MAX_HOURS_CONTINUOUSLY;
}

Member Function Documentation

Implements TimeConstraint.

Definition at line 3337 of file timeconstraint.cpp.

{
       assert(hasWrongDayOrHour(r));
       
       return true;
}

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bool ConstraintTeachersMaxHoursContinuously::computeInternalStructure ( QWidget *  parent,
Rules r 
) [virtual]

Computes the internal structure for this constraint.

It returns false if the constraint is an activity related one and it depends on only inactive activities.

Implements TimeConstraint.

Definition at line 3148 of file timeconstraint.cpp.

{
       Q_UNUSED(parent);
       Q_UNUSED(r);

       return true;
}
double ConstraintTeachersMaxHoursContinuously::fitness ( Solution c,
Rules r,
QList< double > &  cl,
QList< QString > &  dl,
QString *  conflictsString = NULL 
) [virtual]

The function that calculates the fitness of a solution, according to this constraint.

We need the rules to compute this fitness factor. If conflictsString!=NULL, it will be initialized with a text explaining where this restriction is broken.

Implements TimeConstraint.

Definition at line 3213 of file timeconstraint.cpp.

{
       //if the matrices subgroupsMatrix and teachersMatrix are already calculated, do not calculate them again!
       if(!c.teachersMatrixReady || !c.subgroupsMatrixReady){
              c.teachersMatrixReady=true;
              c.subgroupsMatrixReady=true;
              subgroups_conflicts = c.getSubgroupsMatrix(r, subgroupsMatrix);
              teachers_conflicts = c.getTeachersMatrix(r, teachersMatrix);

              c.changedForMatrixCalculation=false;
       }

       int nbroken;

       nbroken=0;
       for(int i=0; i<r.nInternalTeachers; i++){
              for(int d=0; d<r.nDaysPerWeek; d++){
                     int nc=0;
                     for(int h=0; h<r.nHoursPerDay; h++){
                            if(teachersMatrix[i][d][h]>0)
                                   nc++;
                            else{
                                   if(nc>this->maxHoursContinuously){
                                          nbroken++;

                                          if(conflictsString!=NULL){
                                                 QString s=(tr(
                                                  "Time constraint teachers max %1 hours continuously broken for teacher %2, on day %3, length=%4.")
                                                  .arg(CustomFETString::number(this->maxHoursContinuously))
                                                  .arg(r.internalTeachersList[i]->name)
                                                  .arg(r.daysOfTheWeek[d])
                                                  .arg(nc)
                                                  )
                                                  +
                                                  " "
                                                  +
                                                  (tr("This increases the conflicts total by %1").arg(CustomFETString::number(weightPercentage/100)));
                                                 
                                                 dl.append(s);
                                                 cl.append(weightPercentage/100);
                            
                                                 *conflictsString+= s+"\n";
                                          }
                                   }
                            
                                   nc=0;
                            }
                     }

                     if(nc>this->maxHoursContinuously){
                            nbroken++;

                            if(conflictsString!=NULL){
                                   QString s=(tr(
                                    "Time constraint teachers max %1 hours continuously broken for teacher %2, on day %3, length=%4.")
                                    .arg(CustomFETString::number(this->maxHoursContinuously))
                                    .arg(r.internalTeachersList[i]->name)
                                    .arg(r.daysOfTheWeek[d])
                                    .arg(nc)
                                    )
                                    +
                                    " "
                                    +
                                    (tr("This increases the conflicts total by %1").arg(CustomFETString::number(weightPercentage/100)));
                                                 
                                   dl.append(s);
                                   cl.append(weightPercentage/100);
                            
                                   *conflictsString+= s+"\n";
                            }
                     }
              }
       }

       if(weightPercentage==100)   
              assert(nbroken==0);
       return weightPercentage/100 * nbroken;
}

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Returns a small description string for this constraint.

Implements TimeConstraint.

Definition at line 3174 of file timeconstraint.cpp.

                                                                      {
       Q_UNUSED(r);

       QString begin=QString("");
       if(!active)
              begin="X - ";
              
       QString end=QString("");
       if(!comments.isEmpty())
              end=", "+tr("C: %1", "Comments").arg(comments);
              
       QString s;
       s+=tr("Teachers max hours continuously");s+=", ";
       s+=tr("WP:%1\%", "Weight percentage").arg(CustomFETString::number(this->weightPercentage));s+=", ";
       s+=tr("MH:%1", "Maximum hours (continuously)").arg(this->maxHoursContinuously);

       return begin+s+end;
}

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Returns a detailed description string for this constraint.

Implements TimeConstraint.

Definition at line 3193 of file timeconstraint.cpp.

                                                                              {
       Q_UNUSED(r);

       QString s=tr("Time constraint");s+="\n";
       s+=tr("All teachers must respect the maximum number of hours continuously");s+="\n";
       s+=tr("Weight (percentage)=%1\%").arg(CustomFETString::number(this->weightPercentage));s+="\n";
       s+=tr("Maximum hours continuously=%1").arg(this->maxHoursContinuously);s+="\n";

       if(!active){
              s+=tr("Active=%1", "Refers to a constraint").arg(yesNoTranslated(active));
              s+="\n";
       }
       if(!comments.isEmpty()){
              s+=tr("Comments=%1").arg(comments);
              s+="\n";
       }

       return s;
}

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Returns an XML description of this constraint.

Implements TimeConstraint.

Definition at line 3162 of file timeconstraint.cpp.

                                                                         {
       Q_UNUSED(r);

       QString s="<ConstraintTeachersMaxHoursContinuously>\n";
       s+="   <Weight_Percentage>"+CustomFETString::number(this->weightPercentage)+"</Weight_Percentage>\n";
       s+="   <Maximum_Hours_Continuously>"+CustomFETString::number(this->maxHoursContinuously)+"</Maximum_Hours_Continuously>\n";
       s+="   <Active>"+trueFalse(active)+"</Active>\n";
       s+="   <Comments>"+protect(comments)+"</Comments>\n";
       s+="</ConstraintTeachersMaxHoursContinuously>\n";
       return s;
}

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Implements TimeConstraint.

Definition at line 3156 of file timeconstraint.cpp.

{
       Q_UNUSED(r);
       return false;
}

Implements TimeConstraint.

Definition at line 3329 of file timeconstraint.cpp.

{
       if(maxHoursContinuously>r.nHoursPerDay)
              return true;
       
       return false;
}

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Returns true if this constraint is related to this activity.

Implements TimeConstraint.

Definition at line 3292 of file timeconstraint.cpp.

{
       Q_UNUSED(r);
       Q_UNUSED(a);

       return false;
}

Returns true if this constraint is related to this activity tag.

Implements TimeConstraint.

Definition at line 3314 of file timeconstraint.cpp.

{
       Q_UNUSED(s);

       return false;
}

Returns true if this constraint is related to this students set.

Implements TimeConstraint.

Definition at line 3321 of file timeconstraint.cpp.

{
       Q_UNUSED(r);
       Q_UNUSED(s);

       return false;
}

Returns true if this constraint is related to this subject.

Implements TimeConstraint.

Definition at line 3307 of file timeconstraint.cpp.

{
       Q_UNUSED(s);

       return false;
}

Returns true if this constraint is related to this teacher.

Implements TimeConstraint.

Definition at line 3300 of file timeconstraint.cpp.

{
       Q_UNUSED(t);

       return true;
}

Implements TimeConstraint.

Definition at line 3344 of file timeconstraint.cpp.

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Member Data Documentation

bool TimeConstraint::active [inherited]

Definition at line 146 of file timeconstraint.h.

QString TimeConstraint::comments [inherited]

Definition at line 148 of file timeconstraint.h.

The maximum hours continuously.

Definition at line 827 of file timeconstraint.h.

int TimeConstraint::type [inherited]

Specifies the type of this constraint (using the above constants).

Definition at line 153 of file timeconstraint.h.

The percentage weight of this constraint, 100% compulsory, 0% non-compulsory.

Definition at line 144 of file timeconstraint.h.


The documentation for this class was generated from the following files: