в 14:21, 25 мая 2010

2010-05-25T14:21:06Z

Admin: 1 версия: Импорт контента...

2010-05-25T10:24:32Z

1 версия: Импорт контента...

Новая страница

==Load data to QTableView==

<source lang="cpp">
Foundations of Qt Development\Chapter13\modelview\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <QApplication>
#include <QTableView>
#include <QtSql>
void relModel()
{
QSqlRelationalTableModel *model = new QSqlRelationalTableModel();

model->setTable( "names" );
model->setRelation( 0, QSqlRelation( "salaries", "id", "annual" ) );
model->select();

model->setHeaderData( 0, Qt::Horizontal, QObject::tr("Annual Pay") );
model->setHeaderData( 1, Qt::Horizontal, QObject::tr("First Name") );
model->setHeaderData( 2, Qt::Horizontal, QObject::tr("Last Name") );

QTableView *view = new QTableView();
view->setModel( model );
view->show();
}
void tabModel()
{
QSqlTableModel *model = new QSqlTableModel();

model->setTable( "names" );
model->setFilter( "lastname = "Doe"" );
model->select();

model->removeColumn( 0 );

QTableView *view = new QTableView();
view->setModel( model );
view->show();
}
void qryModel()
{
QSqlQueryModel *model = new QSqlQueryModel();
model->setQuery( "SELECT firstname, lastname FROM names" );

QTableView *view = new QTableView();
view->setModel( model );
view->show();
}

int main( int argc, char **argv )
{
QApplication app( argc, argv );
QSqlDatabase db = QSqlDatabase::addDatabase( "QSQLITE" );
db.setDatabaseName( ":memory:" );

if( !db.open() )
{
qDebug() << db.lastError();
qFatal( "Failed to connect." );
}

qDebug( "Connected!" );

QSqlQuery qry;
qry.prepare( "CREATE TABLE IF NOT EXISTS names (id INTEGER UNIQUE PRIMARY KEY, firstname VARCHAR(30), lastname VARCHAR(30))" );
qry.exec();

qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (1, "John", "Doe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (2, "Jane", "Doe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (3, "James", "Doe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (4, "Judy", "Doe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (5, "Richard", "Roe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (6, "Jane", "Roe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (7, "John", "Noakes")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (8, "Donna", "Doe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (:id, :firstname, :lastname)" );
qry.bindValue( ":id", 9 );
qry.bindValue( ":firstname", "Ralph" );
qry.bindValue( ":lastname", "Roe" );
qry.exec();
qry.prepare( "CREATE TABLE IF NOT EXISTS salaries (id INTEGER UNIQUE PRIMARY KEY, annual INTEGER)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (1, 1000)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (2, 900)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (3, 900)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (5, 1100)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (6, 1000)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (8, 1200)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (9, 1200)" );
qry.exec();
relModel();
tabModel();
qryModel();

return app.exec();
}

</source>

==QVariant model for QTableView==

<source lang="cpp">

Foundations of Qt Development\Chapter05\mulmodel\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <QApplication>
#include <QTableView>
#include "mulmodel.h"
int main( int argc, char **argv )
{
QApplication app( argc, argv );
MulModel model( 12, 12 );

QTableView table;
table.setModel( &model );

table.show();

return app.exec();
}

Foundations of Qt Development\Chapter05\mulmodel\mulmodel.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "mulmodel.h"
MulModel::MulModel( int rows, int columns, QObject *parent ) : QAbstractTableModel( parent )
{
m_rows = rows;
m_columns = columns;
}
int MulModel::rowCount( const QModelIndex &parent ) const
{
return m_rows;
}
int MulModel::columnCount( const QModelIndex &parent ) const
{
return m_columns;
}
Qt::ItemFlags MulModel::flags( const QModelIndex &index ) const
{
return Qt::ItemIsSelectable | Qt::ItemIsEnabled;
}
QVariant MulModel::data( const QModelIndex &index, int role ) const
{
switch( role )
{
case Qt::DisplayRole:
return (index.row()+1) * (index.column()+1);

case Qt::ToolTipRole:
return QString( "%1 x %2" ).arg( index.row()+1 ).arg( index.column()+1 );

default:
return QVariant();
}
}
QVariant MulModel::headerData( int section, Qt::Orientation orientation, int role ) const
{
if( role != Qt::DisplayRole )
return QVariant();

return QString::number( section+1 );
}

Foundations of Qt Development\Chapter05\mulmodel\mulmodel.h
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef MULMODEL_H
#define MULMODEL_H
#include <QAbstractTableModel>
class MulModel : public QAbstractTableModel
{
public:
MulModel( int rows, int columns, QObject *parent = 0 );

Qt::ItemFlags flags( const QModelIndex &index ) const;
QVariant data( const QModelIndex &index, int role = Qt::DisplayRole ) const;
QVariant headerData( int section, Qt::Orientation orientation, int role = Qt::DisplayRole ) const;
int rowCount( const QModelIndex &parent = QModelIndex() ) const;
int columnCount( const QModelIndex &parent = QModelIndex() ) const;
private:
int m_rows, m_columns;
};
#endif // MULMODEL_H

</source>

==Set header for QTableView==

<source lang="cpp">
Foundations of Qt Development\Chapter13\modelview\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <QApplication>
#include <QTableView>
#include <QtSql>
void relModel()
{
QSqlRelationalTableModel *model = new QSqlRelationalTableModel();

model->setTable( "names" );
model->setRelation( 0, QSqlRelation( "salaries", "id", "annual" ) );
model->select();

model->setHeaderData( 0, Qt::Horizontal, QObject::tr("Annual Pay") );
model->setHeaderData( 1, Qt::Horizontal, QObject::tr("First Name") );
model->setHeaderData( 2, Qt::Horizontal, QObject::tr("Last Name") );

QTableView *view = new QTableView();
view->setModel( model );
view->show();
}
void tabModel()
{
QSqlTableModel *model = new QSqlTableModel();

model->setTable( "names" );
model->setFilter( "lastname = "Doe"" );
model->select();

model->removeColumn( 0 );

QTableView *view = new QTableView();
view->setModel( model );
view->show();
}
void qryModel()
{
QSqlQueryModel *model = new QSqlQueryModel();
model->setQuery( "SELECT firstname, lastname FROM names" );

QTableView *view = new QTableView();
view->setModel( model );
view->show();
}

int main( int argc, char **argv )
{
QApplication app( argc, argv );
QSqlDatabase db = QSqlDatabase::addDatabase( "QSQLITE" );
db.setDatabaseName( ":memory:" );

if( !db.open() )
{
qDebug() << db.lastError();
qFatal( "Failed to connect." );
}

qDebug( "Connected!" );

QSqlQuery qry;
qry.prepare( "CREATE TABLE IF NOT EXISTS names (id INTEGER UNIQUE PRIMARY KEY, firstname VARCHAR(30), lastname VARCHAR(30))" );
qry.exec();

qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (1, "John", "Doe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (2, "Jane", "Doe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (3, "James", "Doe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (4, "Judy", "Doe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (5, "Richard", "Roe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (6, "Jane", "Roe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (7, "John", "Noakes")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (8, "Donna", "Doe")" );
qry.exec();
qry.prepare( "INSERT INTO names (id, firstname, lastname) VALUES (:id, :firstname, :lastname)" );
qry.bindValue( ":id", 9 );
qry.bindValue( ":firstname", "Ralph" );
qry.bindValue( ":lastname", "Roe" );
qry.exec();
qry.prepare( "CREATE TABLE IF NOT EXISTS salaries (id INTEGER UNIQUE PRIMARY KEY, annual INTEGER)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (1, 1000)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (2, 900)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (3, 900)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (5, 1100)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (6, 1000)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (8, 1200)" );
qry.exec();
qry.prepare( "INSERT INTO salaries (id, annual) VALUES (9, 1200)" );
qry.exec();
relModel();
tabModel();
qryModel();

return app.exec();
}

</source>

==Set model for QTableView==

<source lang="cpp">

#include <QtGui>
int main(int argc, char* argv[]){
QApplication app(argc, argv);
QDirModel dirModel;
QWidgetw;
w.setWindowTitle(QObject::tr("Four directory views using one model"));
QGridLayout *lay = new QGridLayout(&w);
QListView *lv =new QListView;
lay->addWidget(lv, 0, 0);
lv->setModel(&dirModel);
QListView *lvi = new QListView;
lay->addWidget(lvi, 0, 1);
lvi->setViewMode(QListView::IconMode);
lvi->setModel(&dirModel);
QTreeView *trv =new QTreeView;
lay->addWidget(trv, 1, 0);
trv->setModel(&dirModel);
QTableView *tav =new QTableView;
tav->setModel(&dirModel);
lay->addWidget(tav, 1, 1);
QModelIndex cwdIndex = dirModel.index(QDir::currentPath());
lv->setRootIndex(cwdIndex);
lvi->setRootIndex(cwdIndex);
trv->setRootIndex(cwdIndex);
tav->setRootIndex(cwdIndex);
w.show();
return app.exec();
}

</source>

==Set model for QTreeView==

<source lang="cpp">

#include <QtGui>
int main(int argc, char* argv[]){
QApplication app(argc, argv);
QDirModel dirModel;
QWidgetw;
w.setWindowTitle(QObject::tr("Four directory views using one model"));
QGridLayout *lay = new QGridLayout(&w);
QListView *lv =new QListView;
lay->addWidget(lv, 0, 0);
lv->setModel(&dirModel);
QListView *lvi = new QListView;
lay->addWidget(lvi, 0, 1);
lvi->setViewMode(QListView::IconMode);
lvi->setModel(&dirModel);
QTreeView *trv =new QTreeView;
lay->addWidget(trv, 1, 0);
trv->setModel(&dirModel);
QTableView *tav =new QTableView;
tav->setModel(&dirModel);
lay->addWidget(tav, 1, 1);
QModelIndex cwdIndex = dirModel.index(QDir::currentPath());
lv->setRootIndex(cwdIndex);
lvi->setRootIndex(cwdIndex);
trv->setRootIndex(cwdIndex);
tav->setRootIndex(cwdIndex);
w.show();
return app.exec();
}

</source>

← Предыдущая	Версия 14:21, 25 мая 2010
(нет различий)

C++/Qt/QTableView - История изменений

в 14:21, 25 мая 2010

Admin: 1 версия: Импорт контента...