form.cpp

这个是Linux的qt源代码

		createFormImpl( n2, objName, con, tab );
	    out << indent << objName << "->setForm( " << objName << "Form );" << endl;
	}
    }

    // actions, toolbars, menubar
    bool needEndl = FALSE;
    for ( n = e; !n.isNull(); n = n.nextSibling().toElement() ) {
	if ( n.tagName()  == "actions" ) {
	    if ( !needEndl )
		out << endl << indent << "// actions" << endl;
	    createActionImpl( n.firstChild().toElement(), "this" );
	    needEndl = TRUE;
	}
    }
    if ( needEndl )
	out << endl;
    needEndl = FALSE;
    for ( n = e; !n.isNull(); n = n.nextSibling().toElement() ) {
	if ( n.tagName() == "toolbars" ) {
	    if ( !needEndl )
		out << endl << indent << "// toolbars" << endl;
	    createToolbarImpl( n, objClass, objName );
	    needEndl = TRUE;
	}
    }
    if ( needEndl )
	out << endl;
    needEndl = FALSE;
    for ( n = e; !n.isNull(); n = n.nextSibling().toElement() ) {
	if ( n.tagName() == "menubar" ) {
	    if ( !needEndl )
		out << endl << indent << "// menubar" << endl;
	    createMenuBarImpl( n, objClass, objName );
	    needEndl = TRUE;
	}
    }
    if ( needEndl )
	out << endl;

    out << indent << "languageChange();" << endl;

    // take minimumSizeHint() into account, for height-for-width widgets
    if ( !geometry.isNull() ) {
	out << indent << "resize( QSize(" << geometry.width() << ", "
	    << geometry.height() << ").expandedTo(minimumSizeHint()) );" << endl;
	out << indent << "clearWState( WState_Polished );" << endl;
    }

    for ( n = e; !n.isNull(); n = n.nextSibling().toElement() ) {
	if ( n.tagName()  == "connections" ) {
	    // setup signals and slots connections
	    out << endl << indent << "// signals and slots connections" << endl;
	    nl = n.elementsByTagName( "connection" );
	    for ( i = 0; i < (int) nl.length(); i++ ) {
		QString sender, receiver, signal, slot;
		for ( QDomElement n2 = nl.item(i).firstChild().toElement(); !n2.isNull(); n2 = n2.nextSibling().toElement() ) {
		    if ( n2.tagName() == "sender" )
			sender = n2.firstChild().toText().data();
		    else if ( n2.tagName() == "receiver" )
			receiver = n2.firstChild().toText().data();
		    else if ( n2.tagName() == "signal" )
			signal = n2.firstChild().toText().data();
		    else if ( n2.tagName() == "slot" )
			slot = n2.firstChild().toText().data();
		}
		if ( sender.isEmpty() ||
		     receiver.isEmpty() ||
		     signal.isEmpty() ||
		     slot.isEmpty() )
		    continue;
		if ( sender[0] == '<' ||
		     receiver[0] == '<' ||
		     signal[0] == '<' ||
		     slot[0] == '<' )
		    continue;

		sender = registeredName( sender );
		receiver = registeredName( receiver );

		 // translate formwindow name to "this"
		if ( sender == objName )
		    sender = "this";
		if ( receiver == objName )
		    receiver = "this";

		out << indent << "connect( " << sender << ", SIGNAL( " << signal << " ), "
		    << receiver << ", SLOT( " << slot << " ) );" << endl;
	    }
	} else if ( n.tagName()  == "tabstops" ) {
	    // setup tab order
	    out << endl << indent << "// tab order" << endl;
	    QString lastName;
	    QDomElement n2 = n.firstChild().toElement();
	    while ( !n2.isNull() ) {
		if ( n2.tagName() == "tabstop" ) {
		    QString name = n2.firstChild().toText().data();
		    name = registeredName( name );
		    if ( !lastName.isEmpty() )
			out << indent << "setTabOrder( " << lastName << ", " << name << " );" << endl;
		    lastName = name;
		}
		n2 = n2.nextSibling().toElement();
	    }
	}
    }

    // buddies
    bool firstBuddy = TRUE;
    for ( QValueList<Buddy>::Iterator buddy = buddies.begin(); buddy != buddies.end(); ++buddy ) {
	if ( isObjectRegistered( (*buddy).buddy ) ) {
	    if ( firstBuddy ) {
		out << endl << indent << "// buddies" << endl;
	    }
	    out << indent << (*buddy).key << "->setBuddy( " << registeredName( (*buddy).buddy ) << " );" << endl;
	    firstBuddy = FALSE;
	}
    }

    if ( extraFuncts.find( "init()" ) != extraFuncts.end() )
	out << indent << "init();" << endl;

    // end of constructor
    out << "}" << endl;
    out << endl;

    // destructor
    out << "/*" << endl;
    out << " *  Destroys the object and frees any allocated resources" << endl;
    out << " */" << endl;
    out << nameOfClass << "::~" << bareNameOfClass << "()" << endl;
    out << "{" << endl;
    if ( extraFuncts.find( "destroy()" ) != extraFuncts.end() )
	out << indent << "destroy();" << endl;
    out << indent << "// no need to delete child widgets, Qt does it all for us" << endl;
    out << "}" << endl;
    out << endl;

    // handle application events if required
    bool needFontEventHandler = FALSE;
    bool needSqlTableEventHandler = FALSE;
    bool needSqlDataBrowserEventHandler = FALSE;
    nl = e.elementsByTagName( "widget" );
    for ( i = 0; i < (int) nl.length(); i++ ) {
	if ( !DomTool::propertiesOfType( nl.item(i).toElement() , "font" ).isEmpty() )
	    needFontEventHandler = TRUE;
	QString s = getClassName( nl.item(i).toElement() );
	if ( s == "QDataTable" || s == "QDataBrowser" ) {
	    if ( !isFrameworkCodeGenerated( nl.item(i).toElement() ) )
		 continue;
	    if ( s == "QDataTable" )
		needSqlTableEventHandler = TRUE;
	    if ( s == "QDataBrowser" )
		needSqlDataBrowserEventHandler = TRUE;
	}
	if ( needFontEventHandler && needSqlTableEventHandler && needSqlDataBrowserEventHandler )
	    break;
    }
    if ( needFontEventHandler && FALSE ) {
	//	indent = "\t"; // increase indentation for if-clause below
	out << "/*" << endl;
	out << " *  Main event handler. Reimplemented to handle" << endl;
	out << " *  application font changes";
	out << " */" << endl;
	out << "bool " << nameOfClass  << "::event( QEvent* ev )" << endl;
	out << "{" << endl;
	out << "    bool ret = " << objClass << "::event( ev ); " << endl;
	if ( needFontEventHandler ) {
	    indent += "\t";
	    out << "    if ( ev->type() == QEvent::ApplicationFontChange ) {" << endl;
	    for ( i = 0; i < (int) nl.length(); i++ ) {
		n = nl.item(i).toElement();
		QStringList list = DomTool::propertiesOfType( n, "font" );
		for ( it = list.begin(); it != list.end(); ++it )
		    createExclusiveProperty( n, *it );
	    }
	    out << "    }" << endl;
	    indent = "    ";
	}
	out << "}" << endl;
	out << endl;
    }

    if ( needSqlTableEventHandler || needSqlDataBrowserEventHandler ) {
	out << "/*" << endl;
	out << " *  Widget polish.  Reimplemented to handle" << endl;
	if ( needSqlTableEventHandler )
	    out << " *  default data table initialization" << endl;
	if ( needSqlDataBrowserEventHandler )
	    out << " *  default data browser initialization" << endl;
	out << " */" << endl;
	out << "void " << nameOfClass  << "::polish()" << endl;
	out << "{" << endl;
	if ( needSqlTableEventHandler ) {
	    for ( i = 0; i < (int) nl.length(); i++ ) {
		QString s = getClassName( nl.item(i).toElement() );
		if ( s == "QDataTable" ) {
		    n = nl.item(i).toElement();
		    QString c = getObjectName( n );
		    QString conn = getDatabaseInfo( n, "connection" );
		    QString tab = getDatabaseInfo( n, "table" );
		    if ( !( conn.isEmpty() || tab.isEmpty() || !isFrameworkCodeGenerated( nl.item(i).toElement() ) ) ) {
			out << indent << "if ( " << c << " ) {" << endl;
			out << indent << indent << "QSqlCursor* cursor = " << c << "->sqlCursor();" << endl;
			out << indent << indent << "if ( !cursor ) {" << endl;
			if ( conn == "(default)" )
			    out << indent << indent << indent << "cursor = new QSqlCursor( \"" << tab << "\" );" << endl;
			else
			    out << indent << indent << indent << "cursor = new QSqlCursor( \"" << tab << "\", TRUE, " << conn << "Connection );" << endl;
			out << indent << indent << indent << "if ( " << c << "->isReadOnly() ) " << endl;
			out << indent << indent << indent << indent << "cursor->setMode( QSqlCursor::ReadOnly );" << endl;
			out << indent << indent << indent << c << "->setSqlCursor( cursor, FALSE, TRUE );" << endl;
			out << indent << indent << "}" << endl;
			out << indent << indent << "if ( !cursor->isActive() )" << endl;
			out << indent << indent << indent << c << "->refresh( QDataTable::RefreshAll );" << endl;
			out << indent << "}" << endl;
		    }
		}
	    }
	}
	if ( needSqlDataBrowserEventHandler ) {
	    nl = e.elementsByTagName( "widget" );
	    for ( i = 0; i < (int) nl.length(); i++ ) {
		QString s = getClassName( nl.item(i).toElement() );
		if ( s == "QDataBrowser" ) {
		    QString obj = getObjectName( nl.item(i).toElement() );
		    QString tab = getDatabaseInfo( nl.item(i).toElement(),
						   "table" );
		    QString conn = getDatabaseInfo( nl.item(i).toElement(),
						    "connection" );
		    if ( !(tab.isEmpty() || !isFrameworkCodeGenerated( nl.item(i).toElement() ) ) ) {
			out << indent << "if ( " << obj << " ) {" << endl;
			out << indent << indent << "if ( !" << obj << "->sqlCursor() ) {" << endl;
			if ( conn == "(default)" )
			    out << indent << indent << indent << "QSqlCursor* cursor = new QSqlCursor( \"" << tab << "\" );" << endl;
			else
			    out << indent << indent << indent << "QSqlCursor* cursor = new QSqlCursor( \"" << tab << "\", TRUE, " << conn << "Connection );" << endl;
			out << indent << indent << indent << obj << "->setSqlCursor( cursor, TRUE );" << endl;
			out << indent << indent << indent << obj << "->refresh();" << endl;
			out << indent << indent << indent << obj << "->first();" << endl;
			out << indent << indent << "}" << endl;
			out << indent << "}" << endl;
		    }
		}
	    }
	}
	out << indent << objClass << "::polish();" << endl;
	out << "}" << endl;
	out << endl;
    }

    out << "/*" << endl;
    out << " *  Sets the strings of the subwidgets using the current" << endl;
    out << " *  language." << endl;
    out << " */" << endl;
    out << "void " << nameOfClass << "::languageChange()" << endl;
    out << "{" << endl;
    out << languageChangeBody;
    out << "}" << endl;
    out << endl;

    // create stubs for additional slots if necessary
    if ( !extraFuncts.isEmpty() && writeFunctImpl ) {
	it = extraFuncts.begin();
	QStringList::Iterator it2 = extraFunctTyp.begin();
	QStringList::Iterator it3 = extraFunctSpecifier.begin();
	while ( it != extraFuncts.end() ) {
	    QString type = *it2;
	    if ( type.isEmpty() )
		type = "void";
	    type = type.simplifyWhiteSpace();
	    QString fname = Parser::cleanArgs( *it );
	    if ( !(*it3).startsWith("pure") ) { // "pure virtual" or "pureVirtual"
		out << type << " " << nameOfClass << "::" << fname << endl;
		out << "{" << endl;
		if ( *it != "init()" && *it != "destroy()" ) {
		    QRegExp numeric( "^(?:signed|unsigned|u?char|u?short|u?int"
				     "|u?long|Q_U?INT(?:8|16|32)|Q_U?LONG|float"
				     "|double)$" );
		    QString retVal;

		    /*
		      We return some kind of dummy value to shut the
		      compiler up.

		      1.  If the type is 'void', we return nothing.

		      2.  If the type is 'bool', we return 'FALSE'.

		      3.  If the type is 'unsigned long' or
			  'Q_UINT16' or 'double' or similar, we
			  return '0'.

		      4.  If the type is 'Foo *', we return '0'.

		      5.  If the type is 'Foo &', we create a static
			  variable of type 'Foo' and return it.

		      6.  If the type is 'Foo', we assume there's a
			  default constructor and use it.
		    */
		    if ( type != "void" ) {
			QStringList toks = QStringList::split( " ", type );
			bool isBasicNumericType =
				( toks.grep(numeric).count() == toks.count() );

			if ( type == "bool" ) {
			    retVal = "FALSE";
			} else if ( isBasicNumericType || type.endsWith("*") ) {
			    retVal = "0";
			} else if ( type.endsWith("&") ) {
			    do {
				type.truncate( type.length() - 1 );
			    } while ( type.endsWith(" ") );
			    retVal = "uic_temp_var";
			    out << indent << "static " << type << " " << retVal << ";" << endl;
			} else {
			    retVal = type + "()";
			}
		    }

		    out << indent << "qWarning( \"" << nameOfClass << "::" << fname << ": Not implemented yet\" );" << endl;
		    if ( !retVal.isEmpty() )
			out << indent << "return " << retVal << ";" << endl;
		}
		out << "}" << endl;
		out << endl;
	    }
	    ++it;
	    ++it2;
	    ++it3;
	}
    }
}


/*! Creates form support implementation code for the widgets given
  in \a e.

  Traverses recursively over all children.
 */

void Uic::createFormImpl( const QDomElement& e, const QString& form, const QString& connection, const QString& table )
{
    if ( e.tagName() == "widget" &&
	 e.attribute( "class" ) != "QDataTable" ) {
	QString field = getDatabaseInfo( e, "field" );
	if ( !field.isEmpty() ) {
	    if ( isWidgetInTable( e, connection, table ) )
		out << indent << form << "Form->insert( " << getObjectName( e ) << ", " << fixString( field ) << " );" << endl;
	}
    }
    QDomElement n;
    for ( n = e.firstChild().toElement(); !n.isNull(); n = n.nextSibling().toElement() ) {
	createFormImpl( n, form, connection, table );
    }
}