From Forum Nokia Wiki

ID	...	Creation date	04 January 2009
Platform	S60 3rd Edition FP1, S60 3rd Edition FP2, S60 5th Edition	Tested on devices	Emulator
Category	Qt for Symbian	Subcategory

Keywords (APIs, classes, methods, functions): QProgressBar,QSpinBox

Overview

This code snippet demonstrates how to use a QProgressBar in Qt for Symbian.

Various Functions

• This display the current completed percentage in progress bar.

bar->setVisible(1);

• This property is used to invert the direction of the progress in progress bar.

bar->setInvertedAppearance(1);

• This function is used for the orientation of progress bar.

bar->setOrientation(Qt::vertical);

Preconditions

• Download and Install latest version Qt for Symbian - Installation packages which has links on how to install the latest version

Header file

#ifndef PROGRESSBAR_H
#define PROGRESSBAR_H
 
#include <QtGui/QWidget>
#include "ui_progressbar.h"
#include <QProgressBar>
#include <QSpinBox>
#include <QVBoxLayout>
 
class progressbar : public QWidget
{
    Q_OBJECT
 
public:
	progressbar(QWidget *parent = 0);
    ~progressbar();
 
private:
	QWidget* win;
	QVBoxLayout* layout;
	QProgressBar* bar;
	QSpinBox* spin;
};
 
#endif // PROGRESSBAR_H

Source file

#include "progressbar.h"
 
progressbar::progressbar(QWidget *parent)
    : QWidget(parent)
{
	win = new QWidget(this);
	win->setWindowTitle(("LCD Number"),this);
	layout = new QVBoxLayout(this);
	bar = new QProgressBar(this);
	spin = new QSpinBox(this);
	spin->setMaximum(99);
	spin->setMinimum(0);
	bar->resize(200,25);
	bar->setOrientation(Qt::Horizontal);//Orientation can also be vertical
	bar->setRange(0,99);
	connect(spin , SIGNAL(valueChanged(int)), bar, SLOT(setValue(int)));
	layout->addWidget(spin,Qt::AlignCenter);
 
	layout->addWidget(bar,Qt::AlignCenter);
	win->setLayout(layout);
	win->showMaximized();
}
 
progressbar::~progressbar()
{
 // No need to delete any object that has a parent which is properly deleted.
}

PostConditions

• Here as you change the value of the spinbox progress bar will also changed.

• Screen shot at 40% progress

Example

• Download the working example from this link: Progressbar.zip