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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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     7 ** This file is part of the QtGui module of the Qt Toolkit.

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    16 ** GNU Lesser General Public License Usage

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #ifndef QABSTRACTITEMDELEGATE_H

    43 #define QABSTRACTITEMDELEGATE_H

    44 

    45 #include <QtCore/qobject.h>

    46 #include <QtGui/qstyleoption.h>

    47 

    48 QT_BEGIN_HEADER

    49 

    50 QT_BEGIN_NAMESPACE

    51 

    52 QT_MODULE(Gui)

    53 

    54 #ifndef QT_NO_ITEMVIEWS

    55 

    56 class QPainter;

    57 class QModelIndex;

    58 class QAbstractItemModel;

    59 class QAbstractItemView;

    60 class QHelpEvent;

    61 

    62 class Q_GUI_EXPORT QAbstractItemDelegate : public QObject

    63 {

    64     Q_OBJECT

    65 

    66 public:

    67 

    68     enum EndEditHint {

    69         NoHint,

    70         EditNextItem,

    71         EditPreviousItem,

    72         SubmitModelCache,

    73         RevertModelCache

    74     };

    75 

    76     explicit QAbstractItemDelegate(QObject *parent = 0);

    77     virtual ~QAbstractItemDelegate();

    78 

    79     // painting

    80     virtual void paint(QPainter *painter,

    81                        const QStyleOptionViewItem &option,

    82                        const QModelIndex &index) const = 0;

    83 

    84     virtual QSize sizeHint(const QStyleOptionViewItem &option,

    85                            const QModelIndex &index) const = 0;

    86 

    87     // editing

    88     virtual QWidget *createEditor(QWidget *parent,

    89                                   const QStyleOptionViewItem &option,

    90                                   const QModelIndex &index) const;

    91 

    92     virtual void setEditorData(QWidget *editor, const QModelIndex &index) const;

    93 

    94     virtual void setModelData(QWidget *editor,

    95                               QAbstractItemModel *model,

    96                               const QModelIndex &index) const;

    97 

    98     virtual void updateEditorGeometry(QWidget *editor,

    99                                       const QStyleOptionViewItem &option,

   100                                       const QModelIndex &index) const;

   101 

   102     // for non-widget editors

   103     virtual bool editorEvent(QEvent *event,

   104                              QAbstractItemModel *model,

   105                              const QStyleOptionViewItem &option,

   106                              const QModelIndex &index);

   107 

   108     static QString elidedText(const QFontMetrics &fontMetrics, int width,

   109                               Qt::TextElideMode mode, const QString &text);

   110 

   111 public Q_SLOTS:

   112     bool helpEvent(QHelpEvent *event,

   113                    QAbstractItemView *view,

   114                    const QStyleOptionViewItem &option,

   115                    const QModelIndex &index);

   116 

   117 Q_SIGNALS:

   118     void commitData(QWidget *editor);

   119     void closeEditor(QWidget *editor, QAbstractItemDelegate::EndEditHint hint = NoHint);

   120     void sizeHintChanged(const QModelIndex &);

   121 

   122 protected:

   123     QAbstractItemDelegate(QObjectPrivate &, QObject *parent = 0);

   124 private:

   125     Q_DISABLE_COPY(QAbstractItemDelegate)

   126 };

   127 

   128 #endif // QT_NO_ITEMVIEWS

   129 

   130 QT_END_NAMESPACE

   131 

   132 QT_END_HEADER

   133 

   134 #endif // QABSTRACTITEMDELEGATE_H