source: trunk/src/sql/qsqleditorfactory.cpp

/****************************************************************************
**
** Implementation of QSqlEditorFactory class
**
** Created : 2000-11-03
**
** Copyright (C) 2005-2007 Trolltech ASA.  All rights reserved.
**
** This file is part of the sql module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech ASA of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition licenses may use this
** file in accordance with the Qt Commercial License Agreement provided
** with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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**   information about Qt Commercial License Agreements.
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**********************************************************************/

#include "qsqleditorfactory.h"

#ifndef QT_NO_SQL_EDIT_WIDGETS

#include "qsqlfield.h"
#include "qcleanuphandler.h"
#include "qlabel.h"
#include "qlineedit.h"
#include "qspinbox.h"
#include "qcombobox.h"
#include "qdatetimeedit.h"

/*!
    \class QSqlEditorFactory qsqleditorfactory.h
    \brief The QSqlEditorFactory class is used to create the editors
    used by QDataTable and QSqlForm.

    \ingroup database
    \module sql

    QSqlEditorFactory is used by QDataTable and QSqlForm to
    automatically create appropriate editors for a given QSqlField.
    For example if the field is a QVariant::String a QLineEdit would
    be the default editor, whereas a QVariant::Int's default editor
    would be a QSpinBox.

    If you want to create different editors for fields with the same
    data type, subclass QSqlEditorFactory and reimplement the
    createEditor() function.

    \sa QDataTable, QSqlForm
*/


/*!
    Constructs a SQL editor factory with parent \a parent, called \a
    name.
*/

QSqlEditorFactory::QSqlEditorFactory ( QObject * parent, const char * name )
    : QEditorFactory( parent, name )
{

}

/*!
    Destroys the object and frees any allocated resources.
*/

QSqlEditorFactory::~QSqlEditorFactory()
{

}

static QSqlEditorFactory * defaultfactory = 0;
static QCleanupHandler< QSqlEditorFactory > qsql_cleanup_editor_factory;

/*!
    Returns an instance of a default editor factory.
*/

QSqlEditorFactory * QSqlEditorFactory::defaultFactory()
{
    if( defaultfactory == 0 ){
        defaultfactory = new QSqlEditorFactory();
        qsql_cleanup_editor_factory.add( &defaultfactory );
    }

    return defaultfactory;
}

/*!
    Replaces the default editor factory with \a factory. All
    QDataTable and QSqlForm instantiations will use this new factory
    for creating field editors. \e{QSqlEditorFactory takes ownership
    of \a factory, and destroys it when it is no longer needed.}
*/

void QSqlEditorFactory::installDefaultFactory( QSqlEditorFactory * factory )
{
    if( factory == 0 ) return;

    if( defaultfactory != 0 ){
        qsql_cleanup_editor_factory.remove( &defaultfactory );
        delete defaultfactory;
    }
    defaultfactory = factory;
    qsql_cleanup_editor_factory.add( &defaultfactory );
}

/*!
    Creates and returns the appropriate editor widget for the QVariant
    \a variant.

    The widget that is returned has the parent \a parent (which may be
    zero). If \a variant is invalid, 0 is returned.
*/

QWidget * QSqlEditorFactory::createEditor( QWidget * parent,
                                           const QVariant & variant )
{
    return QEditorFactory::createEditor( parent, variant );
}

/*!
    \overload

    Creates and returns the appropriate editor for the QSqlField \a
    field.
*/

QWidget * QSqlEditorFactory::createEditor( QWidget * parent,
                                           const QSqlField * field )
{    
    if ( !field ) {
        return 0;
    }
    
    QWidget * w = 0;
    switch( field->type() ){
        case QVariant::Invalid:
            w = 0;
            break;
        case QVariant::Bool:
            w = new QComboBox( parent, "qt_editor_bool" );
            ((QComboBox *) w)->insertItem( "False" );
            ((QComboBox *) w)->insertItem( "True" );
            break;
        case QVariant::UInt:
            w = new QSpinBox( 0, 2147483647, 1, parent, "qt_editor_spinbox" );
            break;
        case QVariant::Int:
            w = new QSpinBox( -2147483647, 2147483647, 1, parent, "qt_editor_int" );
            break;
        case QVariant::LongLong:
        case QVariant::ULongLong:
        case QVariant::String:
        case QVariant::CString:
        case QVariant::Double:
            w = new QLineEdit( parent, "qt_editor_double" );
            ((QLineEdit*)w)->setFrame( FALSE );
            break;
        case QVariant::Date:
            w = new QDateEdit( parent, "qt_editor_date" );
            break;
        case QVariant::Time:
            w = new QTimeEdit( parent, "qt_editor_time" );
            break;
        case QVariant::DateTime:
            w = new QDateTimeEdit( parent, "qt_editor_datetime" );
            break;
#ifndef QT_NO_LABEL
        case QVariant::Pixmap:
            w = new QLabel( parent, "qt_editor_pixmap" );
            break;
#endif
        case QVariant::Palette:
        case QVariant::ColorGroup:
        case QVariant::Color:
        case QVariant::Font:
        case QVariant::Brush:
        case QVariant::Bitmap:
        case QVariant::Cursor:
        case QVariant::Map:
        case QVariant::StringList:
        case QVariant::Rect:
        case QVariant::Size:
        case QVariant::IconSet:
        case QVariant::Point:
        case QVariant::PointArray:
        case QVariant::Region:
        case QVariant::SizePolicy:
        case QVariant::ByteArray:
        default:
            w = new QWidget( parent, "qt_editor_default" );
            break;
    }
    return w;
}

#endif // QT_NO_SQL