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200 lines
9.8 KiB
200 lines
9.8 KiB
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<title>TQSqlPropertyMap Class</title>
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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>
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<p>The TQSqlPropertyMap class is used to map widgets to SQL fields.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="tqsqlpropertymap-h.html">tqsqlpropertymap.h</a>></tt>
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<p><a href="tqsqlpropertymap-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#TQSqlPropertyMap"><b>TQSqlPropertyMap</b></a> ()</li>
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<li class=fn>virtual <a href="#~TQSqlPropertyMap"><b>~TQSqlPropertyMap</b></a> ()</li>
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<li class=fn>TQVariant <a href="#property"><b>property</b></a> ( TQWidget * widget )</li>
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<li class=fn>virtual void <a href="#setProperty"><b>setProperty</b></a> ( TQWidget * widget, const TQVariant & value )</li>
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<li class=fn>void <a href="#insert"><b>insert</b></a> ( const TQString & classname, const TQString & property )</li>
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<li class=fn>void <a href="#remove"><b>remove</b></a> ( const TQString & classname )</li>
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</ul>
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<h2>Static Public Members</h2>
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<ul>
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<li class=fn>TQSqlPropertyMap * <a href="#defaultMap"><b>defaultMap</b></a> ()</li>
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<li class=fn>void <a href="#installDefaultMap"><b>installDefaultMap</b></a> ( TQSqlPropertyMap * map )</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The TQSqlPropertyMap class is used to map widgets to SQL fields.
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<p>
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<p> The SQL module uses TQt <a href="properties.html">object
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properties</a> to insert and extract values from editor
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widgets.
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<p> This class is used to map editors to SQL fields. This works by
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associating SQL editor class names to the properties used to
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insert and extract values to/from the editor.
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<p> For example, a <a href="ntqlineedit.html">TQLineEdit</a> can be used to edit text strings and
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other data types in TQDataTables or TQSqlForms. Several properties
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are defined in TQLineEdit, but only the <em>text</em> property is used to
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insert and extract text from a TQLineEdit. Both <a href="tqdatatable.html">TQDataTable</a> and
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<a href="tqsqlform.html">TQSqlForm</a> use the global TQSqlPropertyMap for inserting and
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extracting values to and from an editor widget. The global
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property map defines several common widgets and properties that
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are suitable for many applications. You can add and remove widget
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properties to suit your specific needs.
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<p> If you want to use custom editors with your TQDataTable or
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TQSqlForm, you must install your own TQSqlPropertyMap for that table
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or form. Example:
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<p> <pre>
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TQSqlPropertyMap *myMap = new TQSqlPropertyMap();
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<a href="tqsqlform.html">TQSqlForm</a> *myForm = new <a href="tqsqlform.html">TQSqlForm</a>( this );
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MyEditor myEditor( this );
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// Set the TQSqlForm's record buffer to the update buffer of
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// a pre-existing TQSqlCursor called 'cur'.
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myForm-><a href="tqsqlform.html#setRecord">setRecord</a>( cur->primeUpdate() );
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// Install the customized map
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myMap-><a href="#insert">insert</a>( "MyEditor", "content" );
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myForm-><a href="tqsqlform.html#installPropertyMap">installPropertyMap</a>( myMap ); // myForm now owns myMap
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...
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// Insert a field into the form that uses a myEditor to edit the
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// field 'somefield'
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myForm-><a href="tqsqlform.html#insert">insert</a>( &myEditor, "somefield" );
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// Update myEditor with the value from the mapped database field
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myForm-><a href="tqsqlform.html#readFields">readFields</a>();
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...
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// Let the user edit the form
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...
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// Update the database fields with the values in the form
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myForm-><a href="tqsqlform.html#writeFields">writeFields</a>();
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...
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</pre>
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<p> You can also replace the global TQSqlPropertyMap that is used by
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default. (Bear in mind that TQSqlPropertyMap takes ownership of the
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new default map.)
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<p> <pre>
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TQSqlPropertyMap *myMap = new TQSqlPropertyMap;
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myMap-><a href="#insert">insert</a>( "MyEditor", "content" );
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TQSqlPropertyMap::<a href="#installDefaultMap">installDefaultMap</a>( myMap );
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...
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</pre>
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<p> <p>See also <a href="tqdatatable.html">TQDataTable</a>, <a href="tqsqlform.html">TQSqlForm</a>, <a href="tqsqleditorfactory.html">TQSqlEditorFactory</a>, and <a href="database.html">Database Classes</a>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="TQSqlPropertyMap"></a>TQSqlPropertyMap::TQSqlPropertyMap ()
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</h3>
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<p> Constructs a TQSqlPropertyMap.
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<p> The default property mappings used by TQt widgets are:
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<center><table cellpadding="4" cellspacing="2" border="0">
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<tr bgcolor="#a2c511"> <th valign="top">Widgets <th valign="top">Property
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<tr bgcolor="#f0f0f0"> <td valign="top"><a href="ntqcheckbox.html">TQCheckBox</a>,
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<a href="ntqradiobutton.html">TQRadioButton</a>
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<td valign="top">checked
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<tr bgcolor="#d0d0d0"> <td valign="top"><a href="ntqcombobox.html">TQComboBox</a>,
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<a href="ntqlistbox.html">TQListBox</a>
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<td valign="top">currentItem
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<tr bgcolor="#f0f0f0"> <td valign="top"><a href="qdateedit.html">TQDateEdit</a>
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<td valign="top">date
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<tr bgcolor="#d0d0d0"> <td valign="top"><a href="ntqdatetimeedit.html">TQDateTimeEdit</a>
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<td valign="top">dateTime
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<tr bgcolor="#f0f0f0"> <td valign="top"><a href="ntqtextbrowser.html">TQTextBrowser</a>
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<td valign="top">source
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<tr bgcolor="#d0d0d0"> <td valign="top"><a href="ntqbutton.html">TQButton</a>,
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<a href="ntqdial.html">TQDial</a>,
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<a href="ntqlabel.html">TQLabel</a>,
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<a href="ntqlineedit.html">TQLineEdit</a>,
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<a href="ntqmultilineedit.html">TQMultiLineEdit</a>,
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<a href="ntqpushbutton.html">TQPushButton</a>,
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<a href="ntqtextedit.html">TQTextEdit</a>,
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<td valign="top">text
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<tr bgcolor="#f0f0f0"> <td valign="top"><a href="qtimeedit.html">TQTimeEdit</a>
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<td valign="top">time
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<tr bgcolor="#d0d0d0"> <td valign="top"><a href="ntqlcdnumber.html">TQLCDNumber</a>,
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<a href="ntqscrollbar.html">TQScrollBar</a>
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<a href="ntqslider.html">TQSlider</a>,
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<a href="ntqspinbox.html">TQSpinBox</a>
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<td valign="top">value
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</table></center>
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<h3 class=fn><a name="~TQSqlPropertyMap"></a>TQSqlPropertyMap::~TQSqlPropertyMap ()<tt> [virtual]</tt>
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</h3>
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Destroys the TQSqlPropertyMap.
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<p> Note that if the TQSqlPropertyMap is installed with
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installPropertyMap() the object it was installed into, e.g. the
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<a href="tqsqlform.html">TQSqlForm</a>, takes ownership and will delete the TQSqlPropertyMap when
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necessary.
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<h3 class=fn><a href="tqsqlpropertymap.html">TQSqlPropertyMap</a> * <a name="defaultMap"></a>TQSqlPropertyMap::defaultMap ()<tt> [static]</tt>
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</h3>
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Returns the application global TQSqlPropertyMap.
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<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 )
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</h3>
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Insert a new classname/property pair, which is used for custom SQL
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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>.
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<p>Example: <a href="sql.html#x2239">sql/overview/custom1/main.cpp</a>.
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<h3 class=fn>void <a name="installDefaultMap"></a>TQSqlPropertyMap::installDefaultMap ( <a href="tqsqlpropertymap.html">TQSqlPropertyMap</a> * map )<tt> [static]</tt>
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</h3>
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Replaces the global default property map with <em>map</em>. All
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<a href="tqdatatable.html">TQDataTable</a> and <a href="tqsqlform.html">TQSqlForm</a> instantiations will use this new map for
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inserting and extracting values to and from editors.
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<em>TQSqlPropertyMap takes ownership of \a map, and destroys it when it is no longer needed.</em>
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<h3 class=fn><a href="ntqvariant.html">TQVariant</a> <a name="property"></a>TQSqlPropertyMap::property ( <a href="tqwidget.html">TQWidget</a> * widget )
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</h3>
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Returns the mapped property of <em>widget</em> as a <a href="ntqvariant.html">TQVariant</a>.
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<h3 class=fn>void <a name="remove"></a>TQSqlPropertyMap::remove ( const <a href="ntqstring.html">TQString</a> & classname )
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</h3>
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Removes <em>classname</em> from the map.
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<h3 class=fn>void <a name="setProperty"></a>TQSqlPropertyMap::setProperty ( <a href="tqwidget.html">TQWidget</a> * widget, const <a href="ntqvariant.html">TQVariant</a> & value )<tt> [virtual]</tt>
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</h3>
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Sets the property of <em>widget</em> to <em>value</em>.
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<!-- eof -->
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<hr><p>
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This file is part of the <a href="index.html">TQt toolkit</a>.
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Copyright © 1995-2007
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<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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