Archived:How to display a widget with normal and maximize size in Qt

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14 Sep
2009

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28 Sep
2009

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Qt Quick should be used for all UI development on mobile devices. The approach described in this article (based on QWidget) is deprecated.

In this article we will create three button widgets with QPushButton and display two of them in Normal and Maximum size. QWidget::showNormal () slot is used to restores the widget after it has been maximized or minimized and QWidget::showMinimized () is used to shows the widget minimized. The third button Exit calls quit() slot to exit out from the application.

Article Metadata

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Tested with

Devices(s): Emulator

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Compatibility

Platform(s): S60 3rd Edition, S60 5th Edition

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Article

Keywords: QVBoxLayout,QHBoxLayout

Created: james1980 (28 Dec 2008)

Last edited: hamishwillee (11 Oct 2012)

Code

#include <QApplication>
#include <QPushButton>
#include <QVBoxLayout>
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
    // win is the top level widget
    QWidget win;
    QVBoxLayout* layout = new QVBoxLayout(&win);
 
    // This button show the top level widget in a normal size
    QPushButton* normalSizeButton = new QPushButton("Normal size");
    QObject::connect(normalSizeButton, SIGNAL(clicked()), &win, SLOT(showNormal()));
    layout->addWidget(normalSizeButton);
 
    // This button maximize the widget size
    QPushButton* maximzeButton = new QPushButton("Maximize");
    QObject::connect(maximzeButton, SIGNAL(clicked()), &win, SLOT(showMaximized()));
    layout->addWidget(maximzeButton);
 
    // This button exit the application
    QPushButton* exitButton = new QPushButton("Exit");
    QObject::connect(exitButton, SIGNAL(clicked()), &app, SLOT(quit()));
    layout->addWidget(exitButton);
 
    win.show(); // show the top level widget
    return app.exec(); // start the event loop
}

Output after clicking on Normal Size

Output after clicking on maximize