The QSqlPropertyMap class is used to map widgets to SQL fields. Más...

#include <qsqlpropertymap.h>

Métodos públicos
	QSqlPropertyMap ()
virtual	~QSqlPropertyMap ()
QVariant	property (QWidget *widget)
virtual void	setProperty (QWidget *widget, const QVariant &value)
void	insert (const QString &classname, const QString &property)
void	remove (const QString &classname)
	QSqlPropertyMap ()
virtual	~QSqlPropertyMap ()
QVariant	property (QWidget *widget)
virtual void	setProperty (QWidget *widget, const QVariant &value)
void	insert (const QString &classname, const QString &property)
void	remove (const QString &classname)
Métodos públicos estáticos
static QSqlPropertyMap *	defaultMap ()
static void	installDefaultMap (QSqlPropertyMap *map)
static QSqlPropertyMap *	defaultMap ()
static void	installDefaultMap (QSqlPropertyMap *map)

Descripción detallada

The QSqlPropertyMap class is used to map widgets to SQL fields.

sql

The SQL module uses Qt object properties 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 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:

    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();
    ...

You can also replace the global QSqlPropertyMap that is used by default. (Bear in mind that QSqlPropertyMap takes ownership of the new default map.)

    QSqlPropertyMap *myMap = new QSqlPropertyMap;

    myMap->insert( "MyEditor", "content" );
    QSqlPropertyMap::installDefaultMap( myMap );
    ...

Ver también:: QDataTable, QSqlForm, QSqlEditorFactory

Documentación del constructor y destructor

QSqlPropertyMap::QSqlPropertyMap ( )

Constructs a QSqlPropertyMap.

The default property mappings used by Qt widgets are: Widgets Property QCheckBox, QRadioButton checked QComboBox, QListBox currentItem QDateEdit date QDateTimeEdit dateTime QTextBrowser source QButton, QDial, QLabel, QLineEdit, QMultiLineEdit, QPushButton, QTextEdit, text QTimeEdit time QLCDNumber, QScrollBar QSlider, QSpinBox value

QSqlPropertyMap::~QSqlPropertyMap ( ) [virtual]

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 ( )

virtual QSqlPropertyMap::~QSqlPropertyMap ( ) [virtual]

Documentación de las funciones miembro

QSqlPropertyMap * QSqlPropertyMap::defaultMap ( ) [static]

Returns the application global QSqlPropertyMap.

static QSqlPropertyMap* QSqlPropertyMap::defaultMap ( ) [static]

void QSqlPropertyMap::insert	(	const QString &	classname,
		const QString &	property
	)

void QSqlPropertyMap::insert	(	const QString &	classname,
		const QString &	property
	)

Insert a new classname/property pair, which is used for custom SQL field editors. There must be a Q_PROPERTY clause in the classname class declaration for the property.

void QSqlPropertyMap::installDefaultMap ( QSqlPropertyMap * map ) [static]

Replaces the global default property map with map. All QDataTable and QSqlForm instantiations will use this new map for inserting and extracting values to and from editors. {QSqlPropertyMap takes ownership of map, and destroys it when it is no longer needed.}

static void QSqlPropertyMap::installDefaultMap ( QSqlPropertyMap * map ) [static]

QVariant QSqlPropertyMap::property ( QWidget * widget )

Returns the mapped property of widget as a QVariant.

QVariant QSqlPropertyMap::property ( QWidget * widget )

void QSqlPropertyMap::remove ( const QString & classname )

Removes classname from the map.

void QSqlPropertyMap::remove ( const QString & classname )

void QSqlPropertyMap::setProperty	(	QWidget *	widget,
		const QVariant &	value
	)		`[virtual]`

Sets the property of widget to value.

virtual void QSqlPropertyMap::setProperty	(	QWidget *	widget,
		const QVariant &	value
	)		`[virtual]`

La documentación para esta clase fue generada a partir de los siguientes ficheros:

src/qt/include/qsqlpropertymap.h
src/qt/src/sql/qsqlpropertymap.h
src/qt/src/sql/qsqlpropertymap.cpp

Métodos públicos

Métodos públicos estáticos

Descripción detallada

Documentación del constructor y destructor

Documentación de las funciones miembro