How to show another window from mainwindow in QT

Question

Platform: QT, Windows XP

I am new to Qt. I want to show another window(what to do to open it as dialog) from mainwindow. I did "add New Item ->Qt Designer Form Class", named it say MyWindow. But how to show this MyWindow from mainwindow ?

Answer 1

1. Implement a slot in your QMainWindow where you will open your new Window,
2. Place a widget on your QMainWindow,
3. Connect a signal from this widget to a slot from the QMainWindow (for example: if the widget is a QPushButton connect the signal click() to the QMainWindow custom slot you have created).

Code example:

MainWindow.h

// ... include "newwindow.h" // ... public slots:    void openNewWindow(); // ... private:    NewWindow *mMyNewWindow; // ... } 

MainWindow.cpp

// ...    MainWindow::MainWindow()    {       // ...       connect(mMyButton, SIGNAL(click()), this, SLOT(openNewWindow()));       // ...    } // ... void MainWindow::openNewWindow() {    mMyNewWindow = new NewWindow(); // Be sure to destroy your window somewhere    mMyNewWindow->show();    // ... } 

This is an example on how display a custom new window. There are a lot of ways to do this.