busy progress bar without thread ?

[bmn]

ui.initStatus->setMaximum(0);
ui.initStatus->setMinimum(0);
this->timer = new QTimer(this);
connect(this->timer, SIGNAL(timeout()), this, SLOT(advanceProgressBar()));
this->timer->start(100);
 
void advanceProgressBar(){
    qApp->processEvents();
}

ui.initStatus->setMaximum(0);
ui.initStatus->setMinimum(0);
this->timer = new QTimer(this);
connect(this->timer, SIGNAL(timeout()), this, SLOT(advanceProgressBar()));
this->timer->start(100);

void advanceProgressBar(){
    qApp->processEvents();
}

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Don't work

how...
thanks!!

[bmn]

the bar does not move!
don't increment...it is stopped

[jpn]

Works for me:

// main.cpp
#include <QtGui>
 
int main(int argc, char* argv[])
{
    QApplication app(argc, argv);
    QProgressBar progressBar;
    progressBar.setMinimum(0);
    progressBar.setMaximum(0);
    progressBar.show();
    return app.exec();
}

// main.cpp
#include <QtGui>

int main(int argc, char* argv[])
{
    QApplication app(argc, argv);
    QProgressBar progressBar;
    progressBar.setMinimum(0);
    progressBar.setMaximum(0);
    progressBar.show();
    return app.exec();
}

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[bmn]

Works for me:

// main.cpp
#include <QtGui>
 
int main(int argc, char* argv[])
{
    QApplication app(argc, argv);
    QProgressBar progressBar;
    progressBar.setMinimum(0);
    progressBar.setMaximum(0);
    progressBar.show();
    return app.exec();
}

// main.cpp
#include <QtGui>

int main(int argc, char* argv[])
{
    QApplication app(argc, argv);
    QProgressBar progressBar;
    progressBar.setMinimum(0);
    progressBar.setMaximum(0);
    progressBar.show();
    return app.exec();
}

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Don't work... see

QApplication app(argc, argv);
QMainWindow window;
QProgressBar* progressBar = new QProgressBar(&window);
progressBar->setMaximumHeight(16);
progressBar->setMaximumWidth(200);
progressBar->setTextVisible(false);
progressBar->setMaximum(0);
progressBar->setMinimum(0);
 
progressBar->show(); // ??? don't move the bar
 
window.statusBar()->addPermanentWidget(progressBar);
window.statusBar()->showMessage("Loading");
window.show();
app.exec();

QApplication app(argc, argv);
QMainWindow window;
QProgressBar* progressBar = new QProgressBar(&window);
progressBar->setMaximumHeight(16);
progressBar->setMaximumWidth(200);
progressBar->setTextVisible(false);
progressBar->setMaximum(0);
progressBar->setMinimum(0);

progressBar->show(); // ??? don't move the bar

window.statusBar()->addPermanentWidget(progressBar);
window.statusBar()->showMessage("Loading");
window.show();
app.exec();

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[jpn]

Which Qt version are you using? I recall seeing a bug in the past that with some specific style that you had to set a value != 0 to make the busy indicator to work.

[bmn]

I am using Qt4

[jpn]

I am using Qt4

Well, that's not very exact definition. The first version of Qt 4 was released a few years ago. There have been quite a few minor and patch version upgrades since then. What is the exact version eg. 4.x.y? Which style are you using? You can see the bug situation in the task-tracker.

[bmn]

Well, that's not very exact definition. The first version of Qt 4 was released a few years ago. There have been quite a few minor and patch version upgrades since then. What is the exact version eg. 4.x.y? Which style are you using? You can see the bug situation in the task-tracker.

QMake version 2.01a
Using Qt version 4.2.1 in /usr/lib/qt4/lib

[jpn]

QMake version 2.01a
Using Qt version 4.2.1 in /usr/lib/qt4/lib

The current stable version of Qt is 4.4.3. Probably it's time to upgrade. Anyway, have you tried the trick setting the value to something != 0? And again, which style you are using?

[bmn]

The current stable version of Qt is 4.4.3. Probably it's time to upgrade. Anyway, have you tried the trick setting the value to something != 0? And again, which style you are using?

Default Style
this is the test

int main(int argc, char *argv[]){
    QApplication app(argc, argv);
    QMainWindow window;
    QProgressBar* progressBar = new QProgressBar(&window);
    progressBar->setMaximumHeight(16);
    progressBar->setMaximumWidth(200);
    progressBar->setTextVisible(false);
    progressBar->setMaximum(0);
    progressBar->setMinimum(0);
    progressBar->setValue(1); // ??? don't move the bar
    window.statusBar()->addPermanentWidget(progressBar);
    window.statusBar()->showMessage("Loading");
    window.show();
    app.exec();
}

int main(int argc, char *argv[]){
    QApplication app(argc, argv);
    QMainWindow window;
    QProgressBar* progressBar = new QProgressBar(&window);
    progressBar->setMaximumHeight(16);
    progressBar->setMaximumWidth(200);
    progressBar->setTextVisible(false);
    progressBar->setMaximum(0);
    progressBar->setMinimum(0);
    progressBar->setValue(1); // ??? don't move the bar
    window.statusBar()->addPermanentWidget(progressBar);
    window.statusBar()->showMessage("Loading");
    window.show();
    app.exec();
}

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[jpn]

First of all, could you finally start using appropriate [code] tags, please? I already sent instructions to you.

Secondly, the "default style" depends on the environment. The following piece of code prints out which style is the default style for you:

qDebug() << app.style()->objectName();

qDebug() << app.style()->objectName();

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You can try different styles by passing it as a command line argument:

./myapp -style windows

./myapp -style windows

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You can try different styles like "windows", "plastique", "cleanlooks" etc. Does any of them work?

[bmn]

First of all, could you finally start using appropriate [code] tags, please? I already sent instructions to you.

Secondly, the "default style" depends on the environment. The following piece of code prints out which style is the default style for you:

qDebug() << app.style()->objectName();

qDebug() << app.style()->objectName();

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You can try different styles by passing it as a command line argument:

./myapp -style windows

./myapp -style windows

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You can try different styles like "windows", "plastique", "cleanlooks" etc. Does any of them work?

Sorry i will start to use code!!

My default style is cleanlooks, change to windows and WORKS, but, only with windows style.
I will try to set windows style as default
thanks!!

[sheeeng]

It works for me in Qt 4.5.1's QProgressBar.

Just set progressBar.setMinimum(0); progressBar.setMaximum(0); in the designer works for me. The progressBar.value would be -1 automatically in designer.

Hope this helps.