send messages from central widget to mainwindow (statusBar)??

[boudie]

in mainwindow.h
 
private slots:
    void mySliderChanged(int);

in mainwindow.h

private slots:
    void mySliderChanged(int);

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in MainWindow.cpp
 
in constructor MainWindow::MainWindow
    connect(mySlider, SIGNAL(valueChanged(int)), this, SLOT(mySliderChanged(int)));
 
void MainWindow::mySliderChanged(int newValue)
{
    ... send something to your statusbar ...
}

in MainWindow.cpp

in constructor MainWindow::MainWindow
    connect(mySlider, SIGNAL(valueChanged(int)), this, SLOT(mySliderChanged(int)));

void MainWindow::mySliderChanged(int newValue)
{
    ... send something to your statusbar ...
}

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In some cases you can send a value directly from one control to another, but processing a signal the way shown above, gives you freedom to change values or formats before sending it to someplace else.

Make sure that mySlider has tracking == true, if you want immidiate update when moving the slider:

mySlider.setTracking(true);

mySlider.setTracking(true);

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