C++/Qt/QProgressBar

Using QProgressBar

<source lang="cpp"> Foundations of Qt Development\Chapter09\statusbar\main.cpp /*

* Copyright (c) 2006-2007, Johan Thelin
* 
* All rights reserved.
* 
* Redistribution and use in source and binary forms, with or without modification, 
* are permitted provided that the following conditions are met:
* 
*     * Redistributions of source code must retain the above copyright notice, 
*       this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above copyright notice,  
*       this list of conditions and the following disclaimer in the documentation 
*       and/or other materials provided with the distribution.
*     * Neither the name of APress nor the names of its contributors 
*       may be used to endorse or promote products derived from this software 
*       without specific prior written permission.
* 
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/

1. include <QApplication>
2. include <QMainWindow>
3. include <QTextEdit>
4. include <QStatusBar>
5. include <QLabel>
6. include <QProgressBar>

class MainWindow : public QMainWindow { public:

 MainWindow();

}; MainWindow::MainWindow() : QMainWindow() {

 setCentralWidget( new QTextEdit( this ) );
 QStatusBar *statusBar = this->statusBar();
 QProgressBar *progressBar = new QProgressBar();
 QLabel *mode = new QLabel( tr("  EDIT  ") );
 QLabel *modified = new QLabel( tr("  Y  ") );
 QLabel *size = new QLabel( tr("  999999kB  ") );
 mode->setMinimumSize( mode->sizeHint() );
 mode->setAlignment( Qt::AlignCenter );
 mode->setText( tr("EDIT") );
 mode->setToolTip( tr("The current working mode.") );
   
 statusBar->addPermanentWidget( mode );
 modified->setMinimumSize( modified->sizeHint() );
 modified->setAlignment( Qt::AlignCenter );
 modified->setText( tr("N") );
 modified->setToolTip( tr("Indicates if the current document has been modified or not.") );
 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 );
 statusBar->showMessage( tr("Ready"), 2000 );

} int main( int argc, char **argv ) {

 QApplication app( argc, argv );
 
 
 MainWindow window;
 window.show();
 
 return app.exec();

}

 </source>