Archived:How to use QStatusBar

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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.

This article shows how to create a QWidget based app with a status bar.

Article Metadata

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Tested with

Devices(s): n800, n810, n900

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Compatibility

Platform(s): Maemo, Symbian

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Article

Keywords: QStatusBar

Created: diegodobelo (03 Sep 2009)

Last edited: hamishwillee (11 Oct 2012)

Overview

The QMainWindow class allows the creation of a main window which provides a horizontal bar suitable for presenting status information. This bar lies on the bottom of window and can be achieved by calling the function statusBar(). This function creates and returns an object of type QStatusBar, if it does not exist.

The QStatusBar class allows addition of temporary or permanent messages and addition of QLabel, QProgressBar or QToolButton widgets.

Preconditions

To use QStatusBar class we need to include QStatusBar header file:

 #include <QStatusBar>

Example

Considering that we have a QMainWindow, let’s add a temporary message (for ten seconds):

QStatusBar *status;  
status = statusBar();
status->showMessage("this is the status bar", 10000);

Optionally, let’s add a permanent widget (QLabel in this case):

QStatusBar *status;   
QLabel *label = new QLabel(this);
label->setText("this the status bar");
status = statusBar();
status->addPermanentWidget(label, 200);
status->show();

Postconditions

On Maemo, this will display the following image when run:

External links

• QMainWindow
• QStatusBar