exercisemodel.h

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#ifndef EXERCISEMODEL_H
#define EXERCISEMODEL_H

#include <QAbstractItemModel>
#include <QList>
#include <QVariantList>
#include <QIcon>
#include <QDebug>
#include "../Data/datadefinitions.h"

class ExerciseItem;
class DataProject;

class ExerciseModel : public QAbstractItemModel
{
    Q_OBJECT;
    public:
        ExerciseModel(bool exercise, DataProject *project = 0, QAbstractItemModel *parent = 0);
        Qt::ItemFlags flags(const QModelIndex &index) const;
        QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
        QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const;
        QModelIndex parent(const QModelIndex &index) const;
        int rowCount(const QModelIndex &parent = QModelIndex()) const;
        int columnCount(const QModelIndex &parent = QModelIndex()) const;
        QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
        bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole);

        void addChapter(QString chapterName, uint chapterId);
        void addExercise(QString chapterName, QString exerciseName, uint exerciseId, DataExerciseStatus status);
        void addOtherExercises(uint chapterId, ExerciseItem *oldExercise);

        bool existsChapter(QString chapterName);
        bool existsExercise(QString chapterName, QString exerciseName);
        void editState(QString exerciseName, int exerciseId, DataExerciseStatus state);

        void replaceChapterName(ExerciseItem *oldChapter, QString name);
        void replaceExerciseName(ExerciseItem *oldExercise, QString name);

        void removeChapterByName(QString chapterName);
        void removeExerciseByName(QString chapterName, QString exerciseName, uint chapterId = 0);

        void editChapter(QString oldChap, QString newChap);
        void removeChapter(int chapterID, QString chapterName);
        void removeExercise(ExerciseItem *chapter, QString exerciseName);

        int chapterID(QString chapterName);
        QString chapterName(uint chapterId);

        ExerciseItem* chapter(uint chapterId, QString name);
        ExerciseItem* chapterByName(QString name);
        ExerciseItem* chapterById(uint chapterId);

        uint maxChapterID() { return maxChapterId; }
        uint maxExerciseIdByChapterId(uint chapterId);
        uint maxExerciseIdByChapterName(QString chapterName);

        ExerciseItem *getExercise(QString chapterName, QString exerciseName) const;
        ExerciseItem *getItemByName(QString name) const;
        ExerciseItem *getRootItem() { return this->rootItem; }
        void setTeacher(bool state) { isTeacher = state; }
        void drawTreeOnDebugOutput();

        void setPrintDialogUser(bool used)
        {
            isPrintDialog = used;
        }

     private:
        ExerciseItem *rootItem;

        bool isTeacher;
        uint maxChapterId;

        // used for print preview dialog
        bool isPrintDialog;
        DataProject *p_project;

     signals:
        void printError(QString);
        void setSelection(uint, int);
        void resetView();
};

class ExerciseItem
{
    public:
        ExerciseItem(const QVariantList &data, ExerciseItem *parent = 0);
        int childCount() const;
        int columnCount() const;
        ExerciseItem *child(int row);
        QVariant data(int column) const;
        bool setData(QVariant value, int column) const;
        int row() const;
        void addChild(ExerciseItem *item);
        void removeChild(ExerciseItem *item);
        ExerciseItem* parent();

        Qt::CheckState isChecked()
        {
            return checkState;
        }
        void setCheckState(Qt::CheckState value)
        {
            checkState = value;
        }

        QVariantList itemInfo() const { return this->infos; }
        QList<ExerciseItem*> getChildItems() const { return this->childItems; }
        ExerciseItem *getParentItem() const { return this->parentItem; }
        void setParent(ExerciseItem *parent) { this->parentItem=parent; }

        QList<ExerciseItem *> childItems;

        uint maxExerciseID() { return maxExerciseId; }
        void incrementExerciseIdByOne() { maxExerciseId++; }

        int positionOfExerciseById(uint exerciseId);

    private:
        QVariantList infos;
        ExerciseItem *parentItem;
        uint maxExerciseId;
        Qt::CheckState checkState;
};

#endif // EXERCISEVIEWMODEL_H

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