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Diffstat (limited to 'src/qt3support/sql/q3sqlpropertymap.cpp')
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diff --git a/src/qt3support/sql/q3sqlpropertymap.cpp b/src/qt3support/sql/q3sqlpropertymap.cpp new file mode 100644 index 0000000..6e55af0 --- /dev/null +++ b/src/qt3support/sql/q3sqlpropertymap.cpp @@ -0,0 +1,276 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the Qt3Support module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "q3sqlpropertymap.h" + +#ifndef QT_NO_SQL_FORM + +#include "qwidget.h" +#include "q3cleanuphandler.h" +#include "qmetaobject.h" +#include "qmap.h" + +QT_BEGIN_NAMESPACE + +class Q3SqlPropertyMapPrivate +{ +public: + Q3SqlPropertyMapPrivate() {} + QMap<QByteArray, QByteArray> propertyMap; +}; + +/*! + \class Q3SqlPropertyMap + \brief The Q3SqlPropertyMap class is used to map widgets to SQL fields. + + \compat + + 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 Q3DataTables or Q3SqlForms. Several properties + are defined in QLineEdit, but only the \e text property is used to + insert and extract text from a QLineEdit. Both Q3DataTable and + Q3SqlForm use the global Q3SqlPropertyMap 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 Q3DataTable or + Q3SqlForm, you must install your own Q3SqlPropertyMap for that table + or form. Example: + + \snippet doc/src/snippets/code/src_qt3support_sql_q3sqlpropertymap.cpp 0 + + You can also replace the global Q3SqlPropertyMap that is used by + default. (Bear in mind that Q3SqlPropertyMap takes ownership of the + new default map.) + + \snippet doc/src/snippets/code/src_qt3support_sql_q3sqlpropertymap.cpp 1 + + \sa Q3DataTable, Q3SqlForm, Q3SqlEditorFactory +*/ + +/*! + +Constructs a Q3SqlPropertyMap. + +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 Q3ListBox + \i currentItem +\row \i \l Q3DateEdit + \i date +\row \i \l Q3DateTimeEdit + \l QDateTimeEdit + \i dateTime +\row \i \l QTextBrowser + \i source +\row \i \l QAbstractButton, + \l QDial, + \l QLabel, + \l QLineEdit, + \l Q3MultiLineEdit, + \l QPushButton, + \l QTextEdit, + \i text +\row \i \l Q3TimeEdit + \i time +\row \i \l QLCDNumber, + \l QScrollBar + \l QSlider, + \l QSpinBox + \i value +\endtable +*/ + +Q3SqlPropertyMap::Q3SqlPropertyMap() +{ + d = new Q3SqlPropertyMapPrivate(); + const struct MapData { + const char *classname; + const char *property; + } mapData[] = { + { "Q3DateEdit", "date" }, + { "Q3DateTimeEdit", "dateTime" }, + { "Q3ListBox", "currentItem" }, + { "Q3TimeEdit", "time" }, + { "QAbstractButton", "text" }, + { "QCheckBox", "checked" }, + { "QRadioButton", "checked" }, + { "QComboBox", "currentIndex" }, + { "QDateTimeEdit", "dateTime" }, + { "QDial", "value" }, + { "QLabel", "text" }, + { "QLCDNumber", "value" }, + { "QLineEdit", "text" }, + { "QPushButton", "text" }, + { "QScrollBar", "value" }, + { "QSlider", "value" }, + { "QSpinBox", "value" }, + { "QTabBar", "currentTab" }, + { "QTabWidget", "currentPage" }, + { "QTextBrowser", "source" }, + { "QTextEdit", "text" }, + { "QGroupBox", "checked" } + }; + + const MapData *m = mapData; + for (uint i = 0; i < sizeof(mapData)/sizeof(MapData); i++, m++) + d->propertyMap.insert(m->classname, m->property); +} + +/*! + Destroys the Q3SqlPropertyMap. + + Note that if the Q3SqlPropertyMap is installed with + installPropertyMap() the object it was installed into, e.g. the + Q3SqlForm, takes ownership and will delete the Q3SqlPropertyMap when + necessary. +*/ +Q3SqlPropertyMap::~Q3SqlPropertyMap() +{ + delete d; +} + +/*! + Returns the mapped property of \a widget as a QVariant. +*/ +QVariant Q3SqlPropertyMap::property(QWidget * widget) +{ + if(!widget) return QVariant(); + const QMetaObject* mo = widget->metaObject(); + while (mo && !d->propertyMap.contains(mo->className())) + mo = mo->superClass(); + + if (!mo) { + qWarning("Q3SqlPropertyMap::property: %s does not exist", widget->metaObject()->className()); + return QVariant(); + } + return widget->property(d->propertyMap[mo->className()]); +} + +/*! + Sets the property of \a widget to \a value. +*/ +void Q3SqlPropertyMap::setProperty(QWidget * widget, const QVariant & value) +{ + if(!widget) return; + + const QMetaObject* mo = widget->metaObject(); + while (mo && !d->propertyMap.contains(mo->className())) + mo = mo->superClass(); + if (!mo) { + qWarning("Q3SqlPropertyMap::setProperty: %s not handled by Q3SqlPropertyMap", widget->metaObject()->className()); + 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 Q_PROPERTY() clause in the \a + classname class declaration for the \a property. +*/ +void Q3SqlPropertyMap::insert(const QString & classname, + const QString & property) +{ + d->propertyMap[classname.latin1()] = property.latin1(); +} + +/*! + Removes \a classname from the map. +*/ +void Q3SqlPropertyMap::remove(const QString & classname) +{ + d->propertyMap.remove(classname.latin1()); +} + +static Q3SqlPropertyMap * defaultmap = 0; +static Q3CleanupHandler< Q3SqlPropertyMap > qsql_cleanup_property_map; + +/*! + Returns the application global Q3SqlPropertyMap. +*/ +Q3SqlPropertyMap * Q3SqlPropertyMap::defaultMap() +{ + if(defaultmap == 0){ + defaultmap = new Q3SqlPropertyMap(); + qsql_cleanup_property_map.add(&defaultmap); + } + return defaultmap; +} + +/*! + Replaces the global default property map with \a map. All + Q3DataTable and Q3SqlForm instantiations will use this new map for + inserting and extracting values to and from editors. + \e{Q3SqlPropertyMap takes ownership of \a map, and destroys it + when it is no longer needed.} +*/ +void Q3SqlPropertyMap::installDefaultMap(Q3SqlPropertyMap * map) +{ + if(map == 0) return; + + if(defaultmap != 0){ + qsql_cleanup_property_map.remove(&defaultmap); + delete defaultmap; + } + defaultmap = map; + qsql_cleanup_property_map.add(&defaultmap); +} + +QT_END_NAMESPACE + +#endif // QT_NO_SQL_FORM |