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author | Timothy Pearson <[email protected]> | 2011-07-10 15:24:15 -0500 |
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committer | Timothy Pearson <[email protected]> | 2011-07-10 15:24:15 -0500 |
commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /src/sql/qsqlpropertymap.cpp | |
download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip |
Add Qt3 development HEAD version
Diffstat (limited to 'src/sql/qsqlpropertymap.cpp')
-rw-r--r-- | src/sql/qsqlpropertymap.cpp | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/src/sql/qsqlpropertymap.cpp b/src/sql/qsqlpropertymap.cpp new file mode 100644 index 0000000..3c99a1c --- /dev/null +++ b/src/sql/qsqlpropertymap.cpp @@ -0,0 +1,304 @@ +/**************************************************************************** +** +** Definition of QSqlPropertyMap class +** +** Created : 2000-11-20 +** +** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the sql module of the Qt GUI Toolkit. +** +** This file may be used under the terms of the GNU General +** Public License versions 2.0 or 3.0 as published by the Free +** Software Foundation and appearing in the files LICENSE.GPL2 +** and LICENSE.GPL3 included in the packaging of this file. +** Alternatively you may (at your option) use any later version +** of the GNU General Public License if such license has been +** publicly approved by Trolltech ASA (or its successors, if any) +** and the KDE Free Qt Foundation. +** +** Please review the following information to ensure GNU General +** Public Licensing requirements will be met: +** http://trolltech.com/products/qt/licenses/licensing/opensource/. +** If you are unsure which license is appropriate for your use, please +** review the following information: +** http://trolltech.com/products/qt/licenses/licensing/licensingoverview +** or contact the sales department at [email protected]. +** +** This file may be used under the terms of the Q Public License as +** defined by Trolltech ASA and appearing in the file LICENSE.QPL +** included in the packaging of this file. Licensees holding valid Qt +** Commercial 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 WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted +** herein. +** +**********************************************************************/ + +#include "qsqlpropertymap.h" + +#ifndef QT_NO_SQL_FORM + +#include "qwidget.h" +#include "qcleanuphandler.h" +#include "qmetaobject.h" +#include "qmap.h" + +class QSqlPropertyMapPrivate +{ +public: + QSqlPropertyMapPrivate() {} + QMap< QString, QString > propertyMap; +}; + +/*! + \class QSqlPropertyMap qsqlpropertymap.h + \brief The QSqlPropertyMap class is used to map widgets to SQL fields. + + \ingroup database + \module sql + + The SQL module uses Qt \link properties.html object + properties\endlink to insert and extract values from editor + widgets. + + This class is used to map editors to SQL fields. This works by + associating SQL editor class names to the properties used to + insert and extract values to/from the editor. + + For example, a QLineEdit can be used to edit text strings and + other data types in QDataTables or QSqlForms. Several properties + are defined in QLineEdit, but only the \e text property is used to + insert and extract text from a QLineEdit. Both QDataTable and + QSqlForm use the global QSqlPropertyMap for inserting and + extracting values to and from an editor widget. The global + property map defines several common widgets and properties that + are suitable for many applications. You can add and remove widget + properties to suit your specific needs. + + If you want to use custom editors with your QDataTable or + QSqlForm, you must install your own QSqlPropertyMap for that table + or form. Example: + + \code + QSqlPropertyMap *myMap = new QSqlPropertyMap(); + QSqlForm *myForm = new QSqlForm( this ); + MyEditor myEditor( this ); + + // Set the QSqlForm's record buffer to the update buffer of + // a pre-existing QSqlCursor called 'cur'. + myForm->setRecord( cur->primeUpdate() ); + + // Install the customized map + myMap->insert( "MyEditor", "content" ); + myForm->installPropertyMap( myMap ); // myForm now owns myMap + ... + // Insert a field into the form that uses a myEditor to edit the + // field 'somefield' + myForm->insert( &myEditor, "somefield" ); + + // Update myEditor with the value from the mapped database field + myForm->readFields(); + ... + // Let the user edit the form + ... + // Update the database fields with the values in the form + myForm->writeFields(); + ... + \endcode + + You can also replace the global QSqlPropertyMap that is used by + default. (Bear in mind that QSqlPropertyMap takes ownership of the + new default map.) + + \code + QSqlPropertyMap *myMap = new QSqlPropertyMap; + + myMap->insert( "MyEditor", "content" ); + QSqlPropertyMap::installDefaultMap( myMap ); + ... + \endcode + + \sa QDataTable, QSqlForm, QSqlEditorFactory +*/ + +/*! + +Constructs a QSqlPropertyMap. + +The default property mappings used by Qt widgets are: +\table +\header \i Widgets \i Property +\row \i \l QCheckBox, + \l QRadioButton + \i checked +\row \i \l QComboBox, + \l QListBox + \i currentItem +\row \i \l QDateEdit + \i date +\row \i \l QDateTimeEdit + \i dateTime +\row \i \l QTextBrowser + \i source +\row \i \l QButton, + \l QDial, + \l QLabel, + \l QLineEdit, + \l QMultiLineEdit, + \l QPushButton, + \l QTextEdit, + \i text +\row \i \l QTimeEdit + \i time +\row \i \l QLCDNumber, + \l QScrollBar + \l QSlider, + \l QSpinBox + \i value +\endtable +*/ + +QSqlPropertyMap::QSqlPropertyMap() +{ + d = new QSqlPropertyMapPrivate(); + const struct MapData { + const char *classname; + const char *property; + } mapData[] = { + { "QButton", "text" }, + { "QCheckBox", "checked" }, + { "QRadioButton", "checked" }, + { "QComboBox", "currentItem" }, + { "QDateEdit", "date" }, + { "QDateTimeEdit", "dateTime" }, + { "QDial", "value" }, + { "QLabel", "text" }, + { "QLCDNumber", "value" }, + { "QLineEdit", "text" }, + { "QListBox", "currentItem" }, + { "QMultiLineEdit", "text" }, + { "QPushButton", "text" }, + { "QScrollBar", "value" }, + { "QSlider", "value" }, + { "QSpinBox", "value" }, + { "QTextBrowser", "source" }, + { "QTextEdit", "text" }, + { "QTextView", "text" }, + { "QTimeEdit", "time" } + }; + + const MapData *m = mapData; + for ( uint i = 0; i < sizeof(mapData)/sizeof(MapData); i++, m++ ) + d->propertyMap.insert( m->classname, m->property ); +} + +/*! + Destroys the QSqlPropertyMap. + + Note that if the QSqlPropertyMap is installed with + installPropertyMap() the object it was installed into, e.g. the + QSqlForm, takes ownership and will delete the QSqlPropertyMap when + necessary. +*/ +QSqlPropertyMap::~QSqlPropertyMap() +{ + delete d; +} + +/*! + Returns the mapped property of \a widget as a QVariant. +*/ +QVariant QSqlPropertyMap::property( QWidget * widget ) +{ + if( !widget ) return QVariant(); + const QMetaObject* mo = widget->metaObject(); + while ( mo && !d->propertyMap.contains( QString( mo->className() ) ) ) + mo = mo->superClass(); + + if ( !mo ) { +#ifdef QT_CHECK_RANGE + qWarning("QSqlPropertyMap::property: %s does not exist", widget->metaObject()->className() ); +#endif + return QVariant(); + } + return widget->property( d->propertyMap[ mo->className() ] ); +} + +/*! + Sets the property of \a widget to \a value. +*/ +void QSqlPropertyMap::setProperty( QWidget * widget, const QVariant & value ) +{ + if( !widget ) return; + + QMetaObject* mo = widget->metaObject(); + while ( mo && !d->propertyMap.contains( QString( mo->className() ) ) ) + mo = mo->superClass(); + if ( !mo ) { +#ifdef QT_CHECK_RANGE + qWarning("QSqlPropertyMap::setProperty: %s not handled by QSqlPropertyMap", widget->metaObject()->className() ); +#endif + return; + } + + widget->setProperty( d->propertyMap[ mo->className() ], value ); +} + +/*! + Insert a new classname/property pair, which is used for custom SQL + field editors. There \e must be a \c Q_PROPERTY clause in the \a + classname class declaration for the \a property. +*/ +void QSqlPropertyMap::insert( const QString & classname, + const QString & property ) +{ + d->propertyMap[ classname ] = property; +} + +/*! + Removes \a classname from the map. +*/ +void QSqlPropertyMap::remove( const QString & classname ) +{ + d->propertyMap.remove( classname ); +} + +static QSqlPropertyMap * defaultmap = 0; +static QCleanupHandler< QSqlPropertyMap > qsql_cleanup_property_map; + +/*! + Returns the application global QSqlPropertyMap. +*/ +QSqlPropertyMap * QSqlPropertyMap::defaultMap() +{ + if( defaultmap == 0 ){ + defaultmap = new QSqlPropertyMap(); + qsql_cleanup_property_map.add( &defaultmap ); + } + return defaultmap; +} + +/*! + Replaces the global default property map with \a map. All + QDataTable and QSqlForm instantiations will use this new map for + inserting and extracting values to and from editors. + \e{QSqlPropertyMap takes ownership of \a map, and destroys it + when it is no longer needed.} +*/ +void QSqlPropertyMap::installDefaultMap( QSqlPropertyMap * map ) +{ + if( map == 0 ) return; + + if( defaultmap != 0 ){ + qsql_cleanup_property_map.remove( &defaultmap ); + delete defaultmap; + } + defaultmap = map; + qsql_cleanup_property_map.add( &defaultmap ); +} + +#endif // QT_NO_SQL_FORM |