#include <QHBoxLayout>
#include <QPushButton>
#include <QPlainTextEdit>
#include <QVBoxLayout>
#include <QTableView>
#include <QSqlQueryModel>
#include <QSpacerItem>
#include <QHeaderView>
#include <QMessageBox>
#include <QSqlDatabase>
#include <QSqlError>
#include <QSqlQuery>
static bool createConnection()
{
QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName(":memory:");
db.open();
QSqlQuery query;
query.exec("create table person (id int primary key, "
"firstname varchar(20), lastname varchar(20))");
query.exec("insert into person values(101, 'Danny', 'Young')");
query.exec("insert into person values(102, 'Christine', 'Holand')");
query.exec("insert into person values(103, 'Lars', 'Gordon')");
query.exec("insert into person values(104, 'Roberto', 'Robitaille')");
query.exec("insert into person values(105, 'Maria', 'Papadopoulos')");
query.exec("create table offices (id int primary key,"
"imagefile int,"
"location varchar(20),"
"country varchar(20),"
"description varchar(100))");
query.exec("insert into offices "
"values(0, 0, 'Oslo', 'Norway',"
"'Oslo is home to more than 500 000 citizens and has a "
"lot to offer.It has been called \"The city with the big "
"heart\" and this is a nickname we are happy to live up to.')");
query.exec("insert into offices "
"values(1, 1, 'Brisbane', 'Australia',"
"'Brisbane is the capital of Queensland, the Sunshine State, "
"where it is beautiful one day, perfect the next. "
"Brisbane is Australia''s 3rd largest city, being home "
"to almost 2 million people.')");
query.exec("insert into offices "
"values(2, 2, 'Redwood City', 'US',"
"'You find Redwood City in the heart of the Bay Area "
"just north of Silicon Valley. The largest nearby city is "
"San Jose which is the third largest city in California "
"and the 10th largest in the US.')");
query.exec("insert into offices "
"values(3, 3, 'Berlin', 'Germany',"
"'Berlin, the capital of Germany is dynamic, cosmopolitan "
"and creative, allowing for every kind of lifestyle. "
"East meets West in the metropolis at the heart of a "
"changing Europe.')");
query.exec("insert into offices "
"values(4, 4, 'Munich', 'Germany',"
"'Several technology companies are represented in Munich, "
"and the city is often called the \"Bavarian Silicon Valley\". "
"The exciting city is also filled with culture, "
"art and music. ')");
query.exec("insert into offices "
"values(5, 5, 'Beijing', 'China',"
"'Beijing as a capital city has more than 3000 years of "
"history. Today the city counts 12 million citizens, and "
"is the political, economic and cultural centre of China.')");
query.exec("create table images (locationid int, file varchar(20))");
query.exec("insert into images values(0, 'images/oslo.png')");
query.exec("insert into images values(1, 'images/brisbane.png')");
query.exec("insert into images values(2, 'images/redwood.png')");
query.exec("insert into images values(3, 'images/berlin.png')");
query.exec("insert into images values(4, 'images/munich.png')");
query.exec("insert into images values(5, 'images/beijing.png')");
return true;
}
SQLBrowser::SQLBrowser(QWidget* parent):
QWidget(parent)
{
createConnection();
QPushButton* button = new QPushButton("執(zhí)行");
sql = new QPlainTextEdit();
sql->setPlainText("select * from person");
table = new QTableView();
table->setSortingEnabled(true);
connect(table->horizontalHeader(),SIGNAL(sectionClicked(int)),this,SLOT(sortByColumn(int)));
QVBoxLayout* boxLayout = new QVBoxLayout(this);
QHBoxLayout* hLayout = new QHBoxLayout();
hLayout->addWidget(sql,3);
hLayout->addWidget(button,1);
boxLayout->addLayout(hLayout,1);
boxLayout->addWidget(table,3);
connect(button,SIGNAL(clicked()),this,SLOT(execute()));
model.
}
void SQLBrowser::execute()
{
model.setQuery(sql->toPlainText().trimmed());
model.setHeaderData(0,Qt::Horizontal,QObject::tr("ID"));
model.setHeaderData(1,Qt::Horizontal,QObject::tr("First name"));
model.setHeaderData(2,Qt::Horizontal,QObject::tr("Last name"));
model.setHeaderData(3,Qt::Horizontal,QObject::tr("Last name"));
table->setModel(&model);
}
void SQLBrowser::sortByColumn(int col)
{
model.sort(col,Qt::DescendingOrder);
}