src/gui/itemviews/qtablewidget_p.h
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     1 /****************************************************************************
       
     2 **
       
     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
       
     4 ** All rights reserved.
       
     5 ** Contact: Nokia Corporation (qt-info@nokia.com)
       
     6 **
       
     7 ** This file is part of the QtGui module of the Qt Toolkit.
       
     8 **
       
     9 ** $QT_BEGIN_LICENSE:LGPL$
       
    10 ** No Commercial Usage
       
    11 ** This file contains pre-release code and may not be distributed.
       
    12 ** You may use this file in accordance with the terms and conditions
       
    13 ** contained in the Technology Preview License Agreement accompanying
       
    14 ** this package.
       
    15 **
       
    16 ** GNU Lesser General Public License Usage
       
    17 ** Alternatively, this file may be used under the terms of the GNU Lesser
       
    18 ** General Public License version 2.1 as published by the Free Software
       
    19 ** Foundation and appearing in the file LICENSE.LGPL included in the
       
    20 ** packaging of this file.  Please review the following information to
       
    21 ** ensure the GNU Lesser General Public License version 2.1 requirements
       
    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
       
    23 **
       
    24 ** In addition, as a special exception, Nokia gives you certain additional
       
    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception
       
    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
       
    27 **
       
    28 ** If you have questions regarding the use of this file, please contact
       
    29 ** Nokia at qt-info@nokia.com.
       
    30 **
       
    31 **
       
    32 **
       
    33 **
       
    34 **
       
    35 **
       
    36 **
       
    37 **
       
    38 ** $QT_END_LICENSE$
       
    39 **
       
    40 ****************************************************************************/
       
    41 
       
    42 #ifndef QTABLEWIDGET_P_H
       
    43 #define QTABLEWIDGET_P_H
       
    44 
       
    45 //
       
    46 //  W A R N I N G
       
    47 //  -------------
       
    48 //
       
    49 // This file is not part of the Qt API. This header file may change
       
    50 // from version to version without notice, or even be removed.
       
    51 //
       
    52 // We mean it.
       
    53 //
       
    54 
       
    55 #include <qheaderview.h>
       
    56 #include <qtablewidget.h>
       
    57 #include <qabstractitemmodel.h>
       
    58 #include <private/qabstractitemmodel_p.h>
       
    59 #include <private/qtableview_p.h>
       
    60 #include <private/qwidgetitemdata_p.h>
       
    61 
       
    62 #ifndef QT_NO_TABLEWIDGET
       
    63 
       
    64 QT_BEGIN_NAMESPACE
       
    65 
       
    66 // workaround for VC++ 6.0 linker bug
       
    67 typedef bool(*LessThan)(const QPair<QTableWidgetItem*,int>&,const QPair<QTableWidgetItem*,int>&);
       
    68 
       
    69 class QTableWidgetMimeData : public QMimeData
       
    70 {
       
    71     Q_OBJECT
       
    72 public:
       
    73     QList<QTableWidgetItem*> items;
       
    74 };
       
    75 
       
    76 class QTableModelLessThan
       
    77 {
       
    78 public:
       
    79     inline bool operator()(QTableWidgetItem *i1, QTableWidgetItem *i2) const
       
    80         { return (*i1 < *i2); }
       
    81 };
       
    82 
       
    83 class QTableModelGreaterThan
       
    84 {
       
    85 public:
       
    86     inline bool operator()(QTableWidgetItem *i1, QTableWidgetItem *i2) const
       
    87         { return (*i2 < *i1); }
       
    88 };
       
    89 
       
    90 class QTableModel : public QAbstractTableModel
       
    91 {
       
    92     Q_OBJECT
       
    93 public:
       
    94     enum ItemFlagsExtension {
       
    95         ItemIsHeaderItem = 128
       
    96     }; // we need this to separate header items from other items
       
    97 
       
    98     QTableModel(int rows, int columns, QTableWidget *parent);
       
    99     ~QTableModel();
       
   100 
       
   101     bool insertRows(int row, int count = 1, const QModelIndex &parent = QModelIndex());
       
   102     bool insertColumns(int column, int count = 1, const QModelIndex &parent = QModelIndex());
       
   103 
       
   104     bool removeRows(int row, int count = 1, const QModelIndex &parent = QModelIndex());
       
   105     bool removeColumns(int column, int count = 1, const QModelIndex &parent = QModelIndex());
       
   106 
       
   107     void setItem(int row, int column, QTableWidgetItem *item);
       
   108     QTableWidgetItem *takeItem(int row, int column);
       
   109     QTableWidgetItem *item(int row, int column) const;
       
   110     QTableWidgetItem *item(const QModelIndex &index) const;
       
   111     void removeItem(QTableWidgetItem *item);
       
   112 
       
   113     void setHorizontalHeaderItem(int section, QTableWidgetItem *item);
       
   114     void setVerticalHeaderItem(int section, QTableWidgetItem *item);
       
   115     QTableWidgetItem *takeHorizontalHeaderItem(int section);
       
   116     QTableWidgetItem *takeVerticalHeaderItem(int section);
       
   117     QTableWidgetItem *horizontalHeaderItem(int section);
       
   118     QTableWidgetItem *verticalHeaderItem(int section);
       
   119 
       
   120     QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const
       
   121         { return QAbstractTableModel::index(row, column, parent); }
       
   122 
       
   123     QModelIndex index(const QTableWidgetItem *item) const;
       
   124 
       
   125     void setRowCount(int rows);
       
   126     void setColumnCount(int columns);
       
   127 
       
   128     int rowCount(const QModelIndex &parent = QModelIndex()) const;
       
   129     int columnCount(const QModelIndex &parent = QModelIndex()) const;
       
   130 
       
   131     QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
       
   132     bool setData(const QModelIndex &index, const QVariant &value, int role);
       
   133     bool setItemData(const QModelIndex &index, const QMap<int, QVariant> &roles);
       
   134 
       
   135     QMap<int, QVariant> itemData(const QModelIndex &index) const;
       
   136 
       
   137     QVariant headerData(int section, Qt::Orientation orientation, int role) const;
       
   138     bool setHeaderData(int section, Qt::Orientation orientation, const QVariant &value, int role);
       
   139 
       
   140     Qt::ItemFlags flags(const QModelIndex &index) const;
       
   141 
       
   142     void sort(int column, Qt::SortOrder order);
       
   143     static bool itemLessThan(const QPair<QTableWidgetItem*,int> &left,
       
   144                              const QPair<QTableWidgetItem*,int> &right);
       
   145     static bool itemGreaterThan(const QPair<QTableWidgetItem*,int> &left,
       
   146                                 const QPair<QTableWidgetItem*,int> &right);
       
   147 
       
   148     void ensureSorted(int column, Qt::SortOrder order, int start, int end);
       
   149     QVector<QTableWidgetItem*> columnItems(int column) const;
       
   150     void updateRowIndexes(QModelIndexList &indexes, int movedFromRow, int movedToRow);
       
   151     static QVector<QTableWidgetItem*>::iterator sortedInsertionIterator(
       
   152         const QVector<QTableWidgetItem*>::iterator &begin,
       
   153         const QVector<QTableWidgetItem*>::iterator &end,
       
   154         Qt::SortOrder order, QTableWidgetItem *item);
       
   155 
       
   156     bool isValid(const QModelIndex &index) const;
       
   157     inline long tableIndex(int row, int column) const
       
   158         { return (row * horizontalHeaderItems.count()) + column; }
       
   159 
       
   160     void clear();
       
   161     void clearContents();
       
   162     void itemChanged(QTableWidgetItem *item);
       
   163 
       
   164     QTableWidgetItem *createItem() const;
       
   165     const QTableWidgetItem *itemPrototype() const;
       
   166     void setItemPrototype(const QTableWidgetItem *item);
       
   167 
       
   168     // dnd
       
   169     QStringList mimeTypes() const;
       
   170     QMimeData *mimeData(const QModelIndexList &indexes) const;
       
   171     bool dropMimeData(const QMimeData *data, Qt::DropAction action,
       
   172             int row, int column, const QModelIndex &parent);
       
   173     Qt::DropActions supportedDropActions() const;
       
   174 
       
   175     QMimeData *internalMimeData()  const;
       
   176 
       
   177 private:
       
   178     const QTableWidgetItem *prototype;
       
   179     QVector<QTableWidgetItem*> tableItems;
       
   180     QVector<QTableWidgetItem*> verticalHeaderItems;
       
   181     QVector<QTableWidgetItem*> horizontalHeaderItems;
       
   182 
       
   183     // A cache must be mutable if get-functions should have const modifiers
       
   184     mutable QModelIndexList cachedIndexes;
       
   185 };
       
   186 
       
   187 class QTableWidgetPrivate : public QTableViewPrivate
       
   188 {
       
   189     Q_DECLARE_PUBLIC(QTableWidget)
       
   190 public:
       
   191     QTableWidgetPrivate() : QTableViewPrivate() {}
       
   192     inline QTableModel *tableModel() const { return qobject_cast<QTableModel*>(model); }
       
   193     void setup();
       
   194 
       
   195     // view signals
       
   196     void _q_emitItemPressed(const QModelIndex &index);
       
   197     void _q_emitItemClicked(const QModelIndex &index);
       
   198     void _q_emitItemDoubleClicked(const QModelIndex &index);
       
   199     void _q_emitItemActivated(const QModelIndex &index);
       
   200     void _q_emitItemEntered(const QModelIndex &index);
       
   201     // model signals
       
   202     void _q_emitItemChanged(const QModelIndex &index);
       
   203     // selection signals
       
   204     void _q_emitCurrentItemChanged(const QModelIndex &previous, const QModelIndex &current);
       
   205     // sorting
       
   206     void _q_sort();
       
   207     void _q_dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
       
   208 };
       
   209 
       
   210 class QTableWidgetItemPrivate
       
   211 {
       
   212 public:
       
   213     QTableWidgetItemPrivate(QTableWidgetItem *item) : q(item), id(-1) {}
       
   214     QTableWidgetItem *q;
       
   215     int id;
       
   216 };
       
   217 
       
   218 QT_END_NAMESPACE
       
   219 
       
   220 #endif // QT_NO_TABLEWIDGET
       
   221 
       
   222 #endif // QTABLEWIDGET_P_H