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< td align = "right" valign = "center" > < img src = "logo32.png" align = "right" width = "64" height = "32" border = "0" > < / td > < / tr > < / table > < h1 align = center > TQSqlPropertyMap Class Reference< br > < small > [< a href = "sql.html" > sql module< / a > ]< / small > < / h1 >
< p > The TQSqlPropertyMap class is used to map widgets to SQL fields.
< a href = "#details" > More...< / a >
< p > < tt > #include < < a href = "qsqlpropertymap-h.html" > ntqsqlpropertymap.h< / a > > < / tt >
< p > < a href = "qsqlpropertymap-members.html" > List of all member functions.< / a >
< h2 > Public Members< / h2 >
< ul >
< li class = fn > < a href = "#TQSqlPropertyMap" > < b > TQSqlPropertyMap< / b > < / a > ()< / li >
< li class = fn > virtual < a href = "#~TQSqlPropertyMap" > < b > ~TQSqlPropertyMap< / b > < / a > ()< / li >
< li class = fn > TQVariant < a href = "#property" > < b > property< / b > < / a > ( TQWidget * widget )< / li >
< li class = fn > virtual void < a href = "#setProperty" > < b > setProperty< / b > < / a > ( TQWidget * widget, const TQVariant & value )< / li >
< li class = fn > void < a href = "#insert" > < b > insert< / b > < / a > ( const TQString & classname, const TQString & property )< / li >
< li class = fn > void < a href = "#remove" > < b > remove< / b > < / a > ( const TQString & classname )< / li >
< / ul >
< h2 > Static Public Members< / h2 >
< ul >
< li class = fn > TQSqlPropertyMap * < a href = "#defaultMap" > < b > defaultMap< / b > < / a > ()< / li >
< li class = fn > void < a href = "#installDefaultMap" > < b > installDefaultMap< / b > < / a > ( TQSqlPropertyMap * map )< / li >
< / ul >
< hr > < a name = "details" > < / a > < h2 > Detailed Description< / h2 >
The TQSqlPropertyMap class is used to map widgets to SQL fields.
< p >
< p > The SQL module uses TQt < a href = "properties.html" > object
properties< / a > to insert and extract values from editor
widgets.
< p > 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.
< p > For example, a < a href = "ntqlineedit.html" > TQLineEdit< / a > can be used to edit text strings and
other data types in TQDataTables or TQSqlForms. Several properties
are defined in TQLineEdit, but only the < em > text< / em > property is used to
insert and extract text from a TQLineEdit. Both < a href = "ntqdatatable.html" > TQDataTable< / a > and
< a href = "ntqsqlform.html" > TQSqlForm< / a > use the global TQSqlPropertyMap 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.
< p > If you want to use custom editors with your TQDataTable or
TQSqlForm, you must install your own TQSqlPropertyMap for that table
or form. Example:
< p > < pre >
TQSqlPropertyMap *myMap = new TQSqlPropertyMap();
< a href = "ntqsqlform.html" > TQSqlForm< / a > *myForm = new < a href = "ntqsqlform.html" > TQSqlForm< / a > ( this );
MyEditor myEditor( this );
// Set the TQSqlForm's record buffer to the update buffer of
// a pre-existing TQSqlCursor called 'cur'.
myForm-> < a href = "ntqsqlform.html#setRecord" > setRecord< / a > ( cur-> primeUpdate() );
// Install the customized map
myMap-> < a href = "#insert" > insert< / a > ( "MyEditor", "content" );
myForm-> < a href = "ntqsqlform.html#installPropertyMap" > installPropertyMap< / a > ( myMap ); // myForm now owns myMap
...
// Insert a field into the form that uses a myEditor to edit the
// field 'somefield'
myForm-> < a href = "ntqsqlform.html#insert" > insert< / a > ( & myEditor, "somefield" );
// Update myEditor with the value from the mapped database field
myForm-> < a href = "ntqsqlform.html#readFields" > readFields< / a > ();
...
// Let the user edit the form
...
// Update the database fields with the values in the form
myForm-> < a href = "ntqsqlform.html#writeFields" > writeFields< / a > ();
...
< / pre >
< p > You can also replace the global TQSqlPropertyMap that is used by
default. (Bear in mind that TQSqlPropertyMap takes ownership of the
new default map.)
< p > < pre >
TQSqlPropertyMap *myMap = new TQSqlPropertyMap;
myMap-> < a href = "#insert" > insert< / a > ( "MyEditor", "content" );
TQSqlPropertyMap::< a href = "#installDefaultMap" > installDefaultMap< / a > ( myMap );
...
< / pre >
< p > < p > See also < a href = "ntqdatatable.html" > TQDataTable< / a > , < a href = "ntqsqlform.html" > TQSqlForm< / a > , < a href = "ntqsqleditorfactory.html" > TQSqlEditorFactory< / a > , and < a href = "database.html" > Database Classes< / a > .
< hr > < h2 > Member Function Documentation< / h2 >
< h3 class = fn > < a name = "TQSqlPropertyMap" > < / a > TQSqlPropertyMap::TQSqlPropertyMap ()
< / h3 >
< p > Constructs a TQSqlPropertyMap.
< p > The default property mappings used by TQt widgets are:
< center > < table cellpadding = "4" cellspacing = "2" border = "0" >
< tr bgcolor = "#a2c511" > < th valign = "top" > Widgets < th valign = "top" > Property
< tr bgcolor = "#f0f0f0" > < td valign = "top" > < a href = "ntqcheckbox.html" > TQCheckBox< / a > ,
< a href = "ntqradiobutton.html" > TQRadioButton< / a >
< td valign = "top" > checked
< tr bgcolor = "#d0d0d0" > < td valign = "top" > < a href = "ntqcombobox.html" > TQComboBox< / a > ,
< a href = "ntqlistbox.html" > TQListBox< / a >
< td valign = "top" > currentItem
< tr bgcolor = "#f0f0f0" > < td valign = "top" > < a href = "qdateedit.html" > TQDateEdit< / a >
< td valign = "top" > date
< tr bgcolor = "#d0d0d0" > < td valign = "top" > < a href = "ntqdatetimeedit.html" > TQDateTimeEdit< / a >
< td valign = "top" > dateTime
< tr bgcolor = "#f0f0f0" > < td valign = "top" > < a href = "ntqtextbrowser.html" > TQTextBrowser< / a >
< td valign = "top" > source
< tr bgcolor = "#d0d0d0" > < td valign = "top" > < a href = "ntqbutton.html" > TQButton< / a > ,
< a href = "ntqdial.html" > TQDial< / a > ,
< a href = "ntqlabel.html" > TQLabel< / a > ,
< a href = "ntqlineedit.html" > TQLineEdit< / a > ,
< a href = "ntqmultilineedit.html" > TQMultiLineEdit< / a > ,
< a href = "ntqpushbutton.html" > TQPushButton< / a > ,
< a href = "ntqtextedit.html" > TQTextEdit< / a > ,
< td valign = "top" > text
< tr bgcolor = "#f0f0f0" > < td valign = "top" > < a href = "qtimeedit.html" > TQTimeEdit< / a >
< td valign = "top" > time
< tr bgcolor = "#d0d0d0" > < td valign = "top" > < a href = "ntqlcdnumber.html" > TQLCDNumber< / a > ,
< a href = "ntqscrollbar.html" > TQScrollBar< / a >
< a href = "ntqslider.html" > TQSlider< / a > ,
< a href = "ntqspinbox.html" > TQSpinBox< / a >
< td valign = "top" > value
< / table > < / center >
< h3 class = fn > < a name = "~TQSqlPropertyMap" > < / a > TQSqlPropertyMap::~TQSqlPropertyMap ()< tt > [virtual]< / tt >
< / h3 >
Destroys the TQSqlPropertyMap.
< p > Note that if the TQSqlPropertyMap is installed with
installPropertyMap() the object it was installed into, e.g. the
< a href = "ntqsqlform.html" > TQSqlForm< / a > , takes ownership and will delete the TQSqlPropertyMap when
necessary.
< h3 class = fn > < a href = "ntqsqlpropertymap.html" > TQSqlPropertyMap< / a > * < a name = "defaultMap" > < / a > TQSqlPropertyMap::defaultMap ()< tt > [static]< / tt >
< / h3 >
Returns the application global TQSqlPropertyMap.
< h3 class = fn > void < a name = "insert" > < / a > TQSqlPropertyMap::insert ( const < a href = "ntqstring.html" > TQString< / a > & classname, const < a href = "ntqstring.html" > TQString< / a > & property )
< / h3 >
Insert a new classname/property pair, which is used for custom SQL
field editors. There < em > must< / em > be a < tt > TQ_PROPERTY< / tt > clause in the < em > classname< / em > class declaration for the < em > property< / em > .
< p > Example: < a href = "sql.html#x2239" > sql/overview/custom1/main.cpp< / a > .
< h3 class = fn > void < a name = "installDefaultMap" > < / a > TQSqlPropertyMap::installDefaultMap ( < a href = "ntqsqlpropertymap.html" > TQSqlPropertyMap< / a > * map )< tt > [static]< / tt >
< / h3 >
Replaces the global default property map with < em > map< / em > . All
< a href = "ntqdatatable.html" > TQDataTable< / a > and < a href = "ntqsqlform.html" > TQSqlForm< / a > instantiations will use this new map for
inserting and extracting values to and from editors.
< em > TQSqlPropertyMap takes ownership of \ a map, and destroys it when it is no longer needed.< / em >
< h3 class = fn > < a href = "ntqvariant.html" > TQVariant< / a > < a name = "property" > < / a > TQSqlPropertyMap::property ( < a href = "ntqwidget.html" > TQWidget< / a > * widget )
< / h3 >
Returns the mapped property of < em > widget< / em > as a < a href = "ntqvariant.html" > TQVariant< / a > .
< h3 class = fn > void < a name = "remove" > < / a > TQSqlPropertyMap::remove ( const < a href = "ntqstring.html" > TQString< / a > & classname )
< / h3 >
Removes < em > classname< / em > from the map.
< h3 class = fn > void < a name = "setProperty" > < / a > TQSqlPropertyMap::setProperty ( < a href = "ntqwidget.html" > TQWidget< / a > * widget, const < a href = "ntqvariant.html" > TQVariant< / a > & value )< tt > [virtual]< / tt >
< / h3 >
Sets the property of < em > widget< / em > to < em > value< / em > .
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