gui::ProgressBar Class Reference

#include <progressbar.h>

Inheritance diagram for gui::ProgressBar:

Public Member Functions
	ProgressBar (QProgressBar *pB)
QProgressBar *	getProgressBar ()
void	start ()
void	finish ()
void	setMaxStep (int maxStep)
void	update (int step)
Private Attributes
QProgressBar *	progressBar

Detailed Description

Progress observer adapter. Implementation of IProgressBar which delegates all operations to wrapped Qt progress bar. This has to be created and destroyed by user (this is because Qt memmory management).
Instance can be used in ProgressObserver IObserver implementation.

 Example:

 // Creates QProgressBar instance
 QProgressBar * qtProgressBar=new QProgressBar();

 // Creates adapter
 ProgressBar * progressBar=new ProgressBar(qtProgressBar);

 // Creates and registers observer to process which progress we
 // want to display
 shared_ptr<ProgressObserver> progressObserver(new ProgressObserver(progressBar));
 process->registerObserver(progressObserver);

In single thread application we can reuse progressObserver on more processes and have one progress bar vizualizator for all of them. In multithread applications where such processes runs in different threads this may be problem because this class doesn't use any kind of synchronization.