www.pudn.com > qt_examples.rar > centralwidget.cpp

/**************************************************************************** 
** $Id: qt/centralwidget.cpp   3.3.1   edited May 27 2003 $ 
** 
** Copyright ( C ) 1992-2000 Trolltech AS.  All rights reserved. 
** 
** This file is part of an example program for Qt.  This example 
** program may be used, distributed and modified without limitation. 
** 
*****************************************************************************/ 
 
#include "centralwidget.h" 
 
#include  
#include  
#include  
#include  
#include  
#include  
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#include  
 
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.atEnd() ) { 
        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( "First &Name", input ); 
    liFirstName->resize( liFirstName->sizeHint() ); 
    grid1->addWidget( liFirstName, 0, 0 ); 
 
    QLabel *liLastName = new QLabel( "&Last Name", input ); 
    liLastName->resize( liLastName->sizeHint() ); 
    grid1->addWidget( liLastName, 0, 1 ); 
 
    QLabel *liAddress = new QLabel( "Add&ress", input ); 
    liAddress->resize( liAddress->sizeHint() ); 
    grid1->addWidget( liAddress, 0, 2 ); 
 
    QLabel *liEMail = new QLabel( "&E-Mail", input ); 
    liEMail->resize( liEMail->sizeHint() ); 
    grid1->addWidget( liEMail, 0, 3 ); 
 
    add = new QPushButton( "A&dd", 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( "First &Name", search ); 
    cFirstName->resize( cFirstName->sizeHint() ); 
    grid2->addWidget( cFirstName, 0, 0 ); 
    connect( cFirstName, SIGNAL( clicked() ), this, SLOT( toggleFirstName() ) ); 
 
    cLastName = new QCheckBox( "&Last Name", search ); 
    cLastName->resize( cLastName->sizeHint() ); 
    grid2->addWidget( cLastName, 0, 1 ); 
    connect( cLastName, SIGNAL( clicked() ), this, SLOT( toggleLastName() ) ); 
 
    cAddress = new QCheckBox( "Add&ress", search ); 
    cAddress->resize( cAddress->sizeHint() ); 
    grid2->addWidget( cAddress, 0, 2 ); 
    connect( cAddress, SIGNAL( clicked() ), this, SLOT( toggleAddress() ) ); 
 
    cEMail = new QCheckBox( "&E-Mail", 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( "F&ind", 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( "First Name" ); 
    listView->addColumn( "Last Name" ); 
    listView->addColumn( "Address" ); 
    listView->addColumn( "E-Mail" ); 
 
    listView->setSelectionMode( QListView::Single ); 
 
    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 ABCentralWidget::toggleAddress() 
{ 
    sAddress->setText( "" ); 
 
    if ( cAddress->isChecked() ) { 
        sAddress->setEnabled( TRUE ); 
        sAddress->setFocus(); 
    } 
    else 
        sAddress->setEnabled( FALSE ); 
} 
 
void ABCentralWidget::toggleEMail() 
{ 
    sEMail->setText( "" ); 
 
    if ( cEMail->isChecked() ) { 
        sEMail->setEnabled( TRUE ); 
        sEMail->setFocus(); 
    } 
    else 
        sEMail->setEnabled( FALSE ); 
} 
 
void ABCentralWidget::findEntries() 
{ 
    if ( !cFirstName->isChecked() && 
         !cLastName->isChecked() && 
         !cAddress->isChecked() && 
         !cEMail->isChecked() ) { 
        listView->clearSelection(); 
        return; 
    } 
 
    QListViewItemIterator it( listView ); 
 
    for ( ; it.current(); ++it ) { 
        bool select = TRUE; 
 
        if ( cFirstName->isChecked() ) { 
            if ( select && it.current()->text( 0 ).contains( sFirstName->text() ) ) 
                select = TRUE; 
            else 
                select = FALSE; 
        } 
        if ( cLastName->isChecked() ) { 
            if ( select && it.current()->text( 1 ).contains( sLastName->text() ) ) 
                select = TRUE; 
            else 
                select = FALSE; 
        } 
        if ( cAddress->isChecked() ) { 
            if ( select && it.current()->text( 2 ).contains( sAddress->text() ) ) 
                select = TRUE; 
            else 
                select = FALSE; 
        } 
        if ( cEMail->isChecked() ) { 
            if ( select && it.current()->text( 3 ).contains( sEMail->text() ) ) 
                select = TRUE; 
            else 
                select = FALSE; 
        } 
 
        if ( select ) 
            it.current()->setSelected( TRUE ); 
        else 
            it.current()->setSelected( FALSE ); 
        it.current()->repaint(); 
    } 
}