error...

[kazal]

hi, i got this at app output...


QObject::installEventFilter(): Cannot filter events for objects in a different thread.

no error while i try to build my program...its shows that after i build.. but
what it means?

[aamer4yu]

You are probably trying to install filter on some object, which is part of another thread..
If you show the code, may be we can tell better

[kazal]

well i dont understand what it means..huhuh

now i try write database using progrmmg..

this my mainwindow.h


#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QWidget>

class QComboBox;
class QDataWidgetMapper;
class QItemSelectionModel;
class QLabel;
class QLineEdit;
class QPushButton;
class QSqlRelationalTableModel;
class QStandardItemModel;
class QStringListModel;
class QTextEdit;

class MainWindow : public QMainWindow {
Q_OBJECT
public:
MainWindow(QWidget *parent = 0);

private slots:
void updateButton(int row);

private:
void setupModel();

QLabel *label;
QTextEdit *textEdit;
QComboBox *comboBox;
QPushButton *pushButton;

QSqlRelationalTableModel *model;
QItemSelectionModel *selectionModel;
QDataWidgetMapper *mapper;



};

#endif // MAINWINDOW_H





mainwindow.cpp



#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QSqlTableModel>
#include <QDataWidgetMapper>
#include <QSqlRelationalDelegate>
#include <QSqlRelationalTableModel>
#include <QMessageBox>
#include <QSqlQuery>

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent)

{
setupModel();

mapper = new QDataWidgetMapper(this);
mapper->setModel(model);
mapper->setItemDelegate(new QSqlRelationalDelegate(this));
mapper->addMapping(comboBox, model->fieldIndex("name"));
mapper->addMapping(textEdit, model->fieldIndex("address"));


connect(pushButton, SIGNAL(clicked()),
mapper, SLOT(updateButton(int)));

setWindowTitle(tr("WiseAviation"));
mapper->toFirst();


}

void MainWindow::setupModel()
{
QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
db.setHostName("localhost");
db.setDatabaseName("wiseavi");
db.setUserName("root");
db.setPassword("root");
if (!db.open()) {
QMessageBox::critical(0, tr("Cannot open database"),
tr("Unable to establish a database connection.\n"
"This example needs SQMySQL support. Please read "
"the Qt SQL driver documentation for information how "
"to build it."), QMessageBox::Cancel);
return;
}

QSqlQuery query;
query.exec("create table workers (name varchar(20), address varchar(200)");
query.exec("insert into workers values( 'Siti', "
"'Sabah')");
query.exec("insert into workers values( 'Atun', "
"'Perak')");
query.exec("insert into workers values( 'fifa', "
"'kedah')");


model = new QSqlRelationalTableModel(this);
model->setTable("workers");
model->setEditStrategy(QSqlTableModel::OnManualSubmit);
model->setEditStrategy(QSqlTableModel::OnFieldChange);
model->select();



}

void MainWindow::updateButton(int row)
{
pushButton->update();
}




main.cpp


#include <QtGui/QApplication>
#include "mainwindow.h"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}

[tbscope]

This is probably not going to solve your problem, but it's an error nontheless.



connect(pushButton, SIGNAL(clicked()), mapper, SLOT(updateButton(int)));

This is wrong for at least two reasons:
1. slots can not have more parameters than signals
2. mapper doesn't contain a slot called updateButton(int)

[aamer4yu]

Am not sure where the installEventFilter code is coming from.
But my guess is mapper->setItemDelegate(new QSqlRelationalDelegate(this));
this is QMainWindow, and you need to assign a view(QTableView) to the delegate.
And you havent created a view !!

[kazal]

i still don't understand..
i use textedit to view ..

could u please to give some code or example to show my data on table?