Qt 4.8
qabstractitemmodel_p.h
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41 
42 #ifndef QABSTRACTITEMMODEL_P_H
43 #define QABSTRACTITEMMODEL_P_H
44 
45 //
46 // W A R N I N G
47 // -------------
48 //
49 // This file is not part of the Qt API. It exists for the convenience
50 // of QAbstractItemModel*. This header file may change from version
51 // to version without notice, or even be removed.
52 //
53 // We mean it.
54 //
55 //
56 
57 #include "private/qobject_p.h"
58 #include "QtCore/qstack.h"
59 #include "QtCore/qset.h"
60 #include "QtCore/qhash.h"
61 
63 
65 {
66 public:
68  QPersistentModelIndexData(const QModelIndex &idx) : index(idx), model(idx.model()) {}
72  static QPersistentModelIndexData *create(const QModelIndex &index);
74 };
75 
77 {
79 
80 public:
81  QAbstractItemModelPrivate() : QObjectPrivate(), supportedDragActions(-1), roleNames(defaultRoleNames()) {}
82  void removePersistentIndexData(QPersistentModelIndexData *data);
83  void movePersistentIndexes(QVector<QPersistentModelIndexData *> indexes, int change, const QModelIndex &parent, Qt::Orientation orientation);
84  void rowsAboutToBeInserted(const QModelIndex &parent, int first, int last);
85  void rowsInserted(const QModelIndex &parent, int first, int last);
86  void rowsAboutToBeRemoved(const QModelIndex &parent, int first, int last);
87  void rowsRemoved(const QModelIndex &parent, int first, int last);
88  void columnsAboutToBeInserted(const QModelIndex &parent, int first, int last);
89  void columnsInserted(const QModelIndex &parent, int first, int last);
90  void columnsAboutToBeRemoved(const QModelIndex &parent, int first, int last);
91  void columnsRemoved(const QModelIndex &parent, int first, int last);
92  static QAbstractItemModel *staticEmptyModel();
93  static bool variantLessThan(const QVariant &v1, const QVariant &v2);
94 
95  void itemsAboutToBeMoved(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation);
96  void itemsMoved(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation orientation);
97  bool allowMove(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation orientation);
98 
99  inline QModelIndex createIndex(int row, int column, void *data = 0) const {
100  return q_func()->createIndex(row, column, data);
101  }
102 
103  inline QModelIndex createIndex(int row, int column, int id) const {
104  return q_func()->createIndex(row, column, id);
105  }
106 
107  inline bool indexValid(const QModelIndex &index) const {
108  return (index.row() >= 0) && (index.column() >= 0) && (index.model() == q_func());
109  }
110 
112  foreach (QPersistentModelIndexData *data, persistent.indexes) {
113  data->index = QModelIndex();
114  data->model = 0;
115  }
116  persistent.indexes.clear();
117  }
118 
125  QHash<QModelIndex, QPersistentModelIndexData *>::iterator it = persistent.indexes.find(index);
126  if(it != persistent.indexes.end()) {
127  QPersistentModelIndexData *data = *it;
128  persistent.indexes.erase(it);
129  data->index = QModelIndex();
130  data->model = 0;
131  }
132  }
133 
134  struct Change {
135  Change() : first(-1), last(-1) {}
136  Change(const Change &c) : parent(c.parent), first(c.first), last(c.last), needsAdjust(c.needsAdjust) {}
137  Change(const QModelIndex &p, int f, int l) : parent(p), first(f), last(l), needsAdjust(false) {}
139  int first, last;
140 
141 
142  // In cases such as this:
143  // - A
144  // - B
145  // - C
146  // - - D
147  // - - E
148  // - - F
149  //
150  // If B is moved to above E, C is the source parent in the signal and its row is 2. When the move is
151  // completed however, C is at row 1 and there is no row 2 at the same level in the model at all.
152  // The QModelIndex is adjusted to correct that in those cases before reporting it though the
153  // rowsMoved signal.
155 
156  bool isValid() { return first >= 0 && last >= 0; }
157  };
159 
160  struct Persistent {
165  void insertMultiAtEnd(const QModelIndex& key, QPersistentModelIndexData *data);
166  } persistent;
167 
168  Qt::DropActions supportedDragActions;
169 
171  static const QHash<int,QByteArray> &defaultRoleNames();
172 };
173 
175 
176 #endif // QABSTRACTITEMMODEL_P_H
The QVariant class acts like a union for the most common Qt data types.
Definition: qvariant.h:92
void invalidatePersistentIndex(const QModelIndex &index)
unsigned char c[8]
Definition: qnumeric_p.h:62
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
static void destroy(QPersistentModelIndexData *data)
The QAtomicInt class provides platform-independent atomic operations on integers. ...
Definition: qatomic.h:55
#define it(className, varName)
QStack< QVector< QPersistentModelIndexData * > > invalidated
QHash< QModelIndex, QPersistentModelIndexData * > indexes
The QStack class is a template class that provides a stack.
Definition: qcontainerfwd.h:63
The QHash class is a template class that provides a hash-table-based dictionary.
Definition: qdatastream.h:66
bool indexValid(const QModelIndex &index) const
The QVector class is a template class that provides a dynamic array.
Definition: qdatastream.h:64
static QPersistentModelIndexData * create(const QModelIndex &index)
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
const QAbstractItemModel * model
int row() const
Returns the row this model index refers to.
const QAbstractItemModel * model() const
Returns a pointer to the model containing the item that this index refers to.
QModelIndex createIndex(int row, int column, int id) const
static const char * data(const QByteArray &arr)
QStack< QVector< QPersistentModelIndexData * > > moved
Change(const QModelIndex &p, int f, int l)
The QAbstractItemModel class provides the abstract interface for item model classes.
#define Q_DECLARE_PUBLIC(Class)
Definition: qglobal.h:2477
#define Q_CORE_EXPORT
Definition: qglobal.h:1449
QPersistentModelIndexData(const QModelIndex &idx)
int key
The QHash::iterator class provides an STL-style non-const iterator for QHash and QMultiHash.
Definition: qhash.h:330
The QModelIndex class is used to locate data in a data model.
QFactoryLoader * l
QHash< int, QByteArray > roleNames
Orientation
Definition: qnamespace.h:174
int column() const
Returns the column this model index refers to.
QModelIndex createIndex(int row, int column, void *data=0) const