嵌入式点菜系统

#include "centralwidget.h" #include <qtabwidget.h> #include <qlistview.h> #include <qlayout.h> #include <qwidget.h> #include <qlabel.h> #include <qpushbutton.h> #include <qlineedit.h> #include <qlabel.h> #include <qcheckbox.h> #include <qfile.h> #include <qtextstream.h> ABCentralWidget::ABCentralWidget( QWidget *parent, const char *name ) : QWidget( parent, name ) { mainGrid = new QGridLayout( this, 2, 1, 5, 5 ); setupTabWidget(); setupListView(); mainGrid->setRowStretch( 0, 0 ); mainGrid->setRowStretch( 1, 1 ); } void ABCentralWidget::save( const QString &filename ) { if ( !listView->firstChild() ) return; QFile f( filename ); if ( !f.open( IO_WriteOnly ) ) return; QTextStream t( &f ); QListViewItemIterator it( listView ); for ( ; it.current(); ++it ) for ( unsigned int i = 0; i < 4; i++ ) t << it.current()->text( i ) << "\n"; f.close(); } void ABCentralWidget::load( const QString &filename ) { listView->clear(); QFile f( filename ); if ( !f.open( IO_ReadOnly ) ) return; QTextStream t( &f ); while ( !t.eof() ) { QListViewItem *item = new QListViewItem( listView ); for ( unsigned int i = 0; i < 4; i++ ) item->setText( i, t.readLine() ); } f.close(); } void ABCentralWidget::setupTabWidget() { tabWidget = new QTabWidget( this ); QWidget *input = new QWidget( tabWidget ); QGridLayout *grid1 = new QGridLayout( input, 2, 5, 5, 5 ); QLabel *liFirstName = new QLabel( "dishes &Name", input ); liFirstName->resize( liFirstName->sizeHint() ); grid1->addWidget( liFirstName, 0, 0 ); QLabel *liLastName = new QLabel( "&Food tastes", input ); liLastName->resize( liLastName->sizeHint() ); grid1->addWidget( liLastName, 0, 1 ); QLabel *liAddress = new QLabel( "&Vegetable prices", input ); liAddress->resize( liAddress->sizeHint() ); grid1->addWidget( liAddress, 0, 2 ); QLabel *liEMail = new QLabel( "&NUM dishes", input ); liEMail->resize( liEMail->sizeHint() ); grid1->addWidget( liEMail, 0, 3 ); add = new QPushButton( "&Add", input ); add->resize( add->sizeHint() ); grid1->addWidget( add, 0, 4 ); connect( add, SIGNAL( clicked() ), this, SLOT( addEntry() ) ); iFirstName = new QLineEdit( input ); iFirstName->resize( iFirstName->sizeHint() ); grid1->addWidget( iFirstName, 1, 0 ); liFirstName->setBuddy( iFirstName ); iLastName = new QLineEdit( input ); iLastName->resize( iLastName->sizeHint() ); grid1->addWidget( iLastName, 1, 1 ); liLastName->setBuddy( iLastName ); iAddress = new QLineEdit( input ); iAddress->resize( iAddress->sizeHint() ); grid1->addWidget( iAddress, 1, 2 ); liAddress->setBuddy( iAddress ); iEMail = new QLineEdit( input ); iEMail->resize( iEMail->sizeHint() ); grid1->addWidget( iEMail, 1, 3 ); liEMail->setBuddy( iEMail ); change = new QPushButton( "&Change", input ); change->resize( change->sizeHint() ); grid1->addWidget( change, 1, 4 ); connect( change, SIGNAL( clicked() ), this, SLOT( changeEntry() ) ); tabWidget->addTab( input, "&Add/Change Entry" ); // -------------------------------------- QWidget *search = new QWidget( this ); QGridLayout *grid2 = new QGridLayout( search, 2, 5, 5, 5 ); cFirstName = new QCheckBox( "dishes &Name", search ); cFirstName->resize( cFirstName->sizeHint() ); grid2->addWidget( cFirstName, 0, 0 ); connect( cFirstName, SIGNAL( clicked() ), this, SLOT( toggleFirstName() ) ); cLastName = new QCheckBox( "&Food tastes", search ); cLastName->resize( cLastName->sizeHint() ); grid2->addWidget( cLastName, 0, 1 ); connect( cLastName, SIGNAL( clicked() ), this, SLOT( toggleLastName() ) ); cAddress = new QCheckBox( "&Vegetable prices", search ); cAddress->resize( cAddress->sizeHint() ); grid2->addWidget( cAddress, 0, 2 ); connect( cAddress, SIGNAL( clicked() ), this, SLOT( toggleAddress() ) ); cEMail = new QCheckBox( "&NUM dishes", search ); cEMail->resize( cEMail->sizeHint() ); grid2->addWidget( cEMail, 0, 3 ); connect( cEMail, SIGNAL( clicked() ), this, SLOT( toggleEMail() ) ); sFirstName = new QLineEdit( search ); sFirstName->resize( sFirstName->sizeHint() ); grid2->addWidget( sFirstName, 1, 0 ); sLastName = new QLineEdit( search ); sLastName->resize( sLastName->sizeHint() ); grid2->addWidget( sLastName, 1, 1 ); sAddress = new QLineEdit( search ); sAddress->resize( sAddress->sizeHint() ); grid2->addWidget( sAddress, 1, 2 ); sEMail = new QLineEdit( search ); sEMail->resize( sEMail->sizeHint() ); grid2->addWidget( sEMail, 1, 3 ); find = new QPushButton( "&Find", search ); find->resize( find->sizeHint() ); grid2->addWidget( find, 1, 4 ); connect( find, SIGNAL( clicked() ), this, SLOT( findEntries() ) ); cFirstName->setChecked( TRUE ); sFirstName->setEnabled( TRUE ); sLastName->setEnabled( FALSE ); sAddress->setEnabled( FALSE ); sEMail->setEnabled( FALSE ); tabWidget->addTab( search, "&Search" ); mainGrid->addWidget( tabWidget, 0, 0 ); } void ABCentralWidget::setupListView() { listView = new QListView( this ); listView->addColumn( "dishes Name" ); listView->addColumn( "Food tastes" ); listView->addColumn( "Vegetable prices" ); listView->addColumn( "NUM dishes" ); listView->setSelectionMode( QListView::Extended ); connect( listView, SIGNAL( clicked( QListViewItem* ) ), this, SLOT( itemSelected( QListViewItem* ) ) ); mainGrid->addWidget( listView, 1, 0 ); listView->setAllColumnsShowFocus( TRUE ); } void ABCentralWidget::addEntry() { if ( !iFirstName->text().isEmpty() || !iLastName->text().isEmpty() || !iAddress->text().isEmpty() || !iEMail->text().isEmpty() ) { QListViewItem *item = new QListViewItem( listView ); item->setText( 0, iFirstName->text() ); item->setText( 1, iLastName->text() ); item->setText( 2, iAddress->text() ); item->setText( 3, iEMail->text() ); } iFirstName->setText( "" ); iLastName->setText( "" ); iAddress->setText( "" ); iEMail->setText( "" ); } void ABCentralWidget::changeEntry() { QListViewItem *item = listView->currentItem(); if ( item && ( !iFirstName->text().isEmpty() || !iLastName->text().isEmpty() || !iAddress->text().isEmpty() || !iEMail->text().isEmpty() ) ) { item->setText( 0, iFirstName->text() ); item->setText( 1, iLastName->text() ); item->setText( 2, iAddress->text() ); item->setText( 3, iEMail->text() ); } } void ABCentralWidget::selectionChanged() { iFirstName->setText( "" ); iLastName->setText( "" ); iAddress->setText( "" ); iEMail->setText( "" ); } void ABCentralWidget::itemSelected( QListViewItem *item ) { if ( !item ) return; item->setSelected( TRUE ); item->repaint(); iFirstName->setText( item->text( 0 ) ); iLastName->setText( item->text( 1 ) ); iAddress->setText( item->text( 2 ) ); iEMail->setText( item->text( 3 ) ); } void ABCentralWidget::toggleFirstName() { sFirstName->setText( "" ); if ( cFirstName->isChecked() ) { sFirstName->setEnabled( TRUE ); sFirstName->setFocus(); } else sFirstName->setEnabled( FALSE ); } void ABCentralWidget::toggleLastName() { sLastName->setText( "" ); if ( cLastName->isChecked() ) { sLastName->setEnabled( TRUE ); sLastName->setFocus(); } else sLastName->setEnabled( FALSE ); } void ABCen