Foundations of Qt Development by Johan Thelin

Author:Johan Thelin [Johan Thelin]
Language: eng
Format: epub, pdf
Tags: C++
Publisher: Apress
Published: 2007-08-22T21:00:00+00:00

size->setMinimumSize( size->sizeHint() );

size->setAlignment( Qt::AlignRight | Qt::AlignVCenter );

size->setText( tr("%1kB ").arg(0) );

size->setToolTip( tr("The memory used for the current document.") );

progressBar->setTextVisible( false );

progressBar->setRange( 0, 0 );

statusBar->addWidget( progressBar, 1 );

statusBar->addWidget( modified );

statusBar->addWidget( size );

...

}

Notice that the widgets are created with a large size and the minimumSize policy to the sizeHint is set. This means that the widgets will not be shrunk to a smaller size than this. By setting the second argument to 1 when adding the progress bar, you enable it to take the rest of the available space. The second argument is the stretch factor, which defaults to zero. By playing with it, you can ensure that the widgets keep their relative sizes when the main window is resized.

The labels then get a proper text and a tooltip before they are added to the status bar. Notice that the permanent widget appears on the right even if it is added before the normal widgets. This is so that a message can cover the normal widgets while keeping the permanent widgets visible. An example can be seen in Figure 9-12.

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