Regarding the navigation from one window to other

[A Former User]

Hai everybody, I am new to Qt. I want to know how to move from one window to other by a click. The problem statement is given below:
I am having a table with 12 rows and 3 columns and nearby i have put a pushbutton. By selecting any one of the row and clicking the pushbutton i have to go to a new window. I am doing every thing without user interface.
I have created the table and push button using program.
Can anybody help me

[A Former User]

You mean like when you push that button, another window will show up?

If that's the case, just create a window, then hide it at the start. Then connect the signal click button with a funtion which will show the hidden window.

[A Former User]

Thanks alot for the reply. I need to see the window wen the push button is clicked. Actually i have written the code in a different way which will give only a message box. I am enclosing the code along with this post. Can u please tell me how to modify the same . I am having one header file named mainwindow.h and one .cpp file mainwindow.cpp and a main file

Mainwindow.h file

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QtGui/QMainWindow>
class MainWindow : public QMainWindow
{
Q_OBJECT

public:
MainWindow(QWidget *parent = 0);
~MainWindow();
private slots:
void on_pushButton_clicked();
};

Mainwindow.cpp

#include "mainwindow.h"
#include <QtGui>
#include <QTableWidget>
#include <QPushButton>
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
QTableWidget *tablewidget = new QTableWidget(this);
int column=3,row=12;
tablewidget->setColumnCount(column);
tablewidget->setRowCount(row);
tablewidget->setItem(0, 0, new QTableWidgetItem("UP"));
tablewidget->setItem(0, 1, new QTableWidgetItem("EAST"));
tablewidget->setItem(0, 2, new QTableWidgetItem("NORTH"));
tablewidget->setItem(1, 0, new QTableWidgetItem("UP"));
tablewidget->setItem(1, 1, new QTableWidgetItem("WEST"));
tablewidget->setItem(1, 2, new QTableWidgetItem("SOUTH"));
tablewidget->setItem(2, 0, new QTableWidgetItem("DOWN"));
tablewidget->setItem(2, 1, new QTableWidgetItem("WEST"));
tablewidget->setItem(2, 2, new QTableWidgetItem("NORTH"));
tablewidget->move(350,300);
tablewidget->resize(330,385);
QPushButton *button= new QPushButton(this);
button->move(1000,300);
button->setText("OK");
connect(button,SIGNAL(clicked()),this,SLOT(on_pushButton_clicked()));
}
MainWindow::~MainWindow()
{
}
void MainWindow::on_pushButton_clicked()
{
QMessageBox :: information(this,"title here","heloo");
}

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();

}

Also can please explain me the method of creating the new windows.
Expecting your early reply

[Code_ReaQtor]

Create a new class that inherits QMainWindow.

for example:

@
#include <QMainWindow>

class YourWindow : public QMainWindow
{
Q_OBJECT
public:
YourWindow(QWidget *parent = 0);
~YourWindow();
//add other functions you want here
};@

If you want the window, "parentless"... you may copy what was done in main.cpp into your MainWindow.cpp:

@YourWindow w;
w.show();@

If not:

@YourWindow *w=new YourWindow(this);
w->exec();@

Note the difference between show() and exec(). You may read the QWidget documentation about these 2 functions since QMainWindow inherited QWidget.

[A Former User]

So basically you need to display another window when you click on push button [if I have understood correctly].
Dialog window is best way. You can use QDialog class.

@void MainWindow::on_pushButton_clicked()
{
QDialog *dialog = new QDialog();
dialog->setModal(true);
dialog->exec();
}@

You can have separate class inherited from QDialog if you wish any design in your dialog window.

[Code_ReaQtor]

[quote author="kirangps" date="1352271346"]So basically you need to display another window when you click on push button [if I have understood correctly].
Dialog window is best way. You can use QDialog class.

@void MainWindow::on_pushButton_clicked()
{
QDialog *dialog = new QDialog();
dialog->setModal(true);
dialog->exec();
}@

You can have separate class inherited from QDialog if you wish any design in your dialog window.[/quote]

Exactly.

But the problem with QDialog was that it blocks all user interaction to your "Main GUI" until it is closed. If you want a "non-blocking" window, use QWidget... but your choice depends on what you need.

[A Former User]

bq. But the problem with QDialog was that it blocks all user interaction to your “Main GUI” until it is closed. If you want a “non-blocking” window, use QWidget… but your choice depends on what you need.

That's correct, dialog window with above code blocks all user interaction with main window as it is a Modal dialog. You can use Non Modal dialog, like,

@void MainWindow::on_pushButton_clicked()
{
QDialog *dialog = new QDialog();
dialog->setModal(false); //make it true for Modal dialog
dialog->show(); // and use show() instead of exec()
}@

[issam]

Hi, I had the some problem last year in a small project, an application that implement the AHP process.
So I used the QWizard class.

So, If QWizard fits your application use it, it is simple !

[A Former User]

Thanks alot. i will try the same

[A Former User]

hai everybody , thanks for your help. Now i am able to navigate from one window to other.
I need to add some widgets in the navigated window. But when i am adding it is not seen in the new window. Can anybody help in this. Advance thanks to all

[A Former User]

sorry for the late reply. I am attaching the code. as the code is having more .cpp and .h files, i am attaching only the page for which the clarification is needed. once again i will tell the aim of the program is listed below:
(1) i want to access the serially transmitted datas from another computer
(2) As soon as the datas are received the same should be displyed in a oscilloscope.

Problem to be solved:
(1) I am able to display one window and able to collect the data through serial port. I have placed a push button in that window. wen the push button is clicked i want to generate a new window in which the qwt oscilloscope window has to be displayed.
(2) I will show the line of code which i have written in this program for the same

connect(ui->openCloseButton, SIGNAL), SLOT));

after the same i have called the osci() function as the one below. void MainWindow::osci() { QMainWindow *osci = new QMainWindow(this); osci->show(); }

Now wen i am clicking a new window is displaying . My question is how to add the components into that new window. or how to include the oscilloscope program of qwt to it .
I was not able to post the entire code here as it is showing exceeding of 6000 characters
I will really gratefull if anybody can give the solution for the one above.
I am conveying my advance thanks to all.

expecting a postive reply

[Code_ReaQtor]

have you tried reading through the Qwt examples? I relied on their examples when I am developing an application that needs graph.

[A Former User]

i have read the Qwt examples . but there is no proper guidance