progressbar.cpp

中嵌培训资料

#include "progressbar.h"

ProgressBarDemo::ProgressBarDemo( QWidget *parent, const char *name ):QWidget( parent, name )
{
	QVBoxLayout *vbox = new QVBoxLayout(this);
	QHBoxLayout *hbox = new QHBoxLayout(vbox);

	start = new QPushButton( "&Start", this );
	hbox->addWidget(start);
	reset = new QPushButton( "&Reset", this );
	hbox->addWidget(reset);
	vbox->addStretch(0);

	progressbar = new QProgressBar( 100, this );
	progressbar->setCenterIndicator(TRUE);
	vbox->addWidget(progressbar);
	connect( start, SIGNAL( clicked() ), this, SLOT( slotStart() ) );
	connect( reset, SIGNAL( clicked() ), this, SLOT( slotReset() ) );

	timer = new QTimer(this);
	connect( timer, SIGNAL( timeout() ), this, SLOT( slotTimeout() ) );
	start->setFixedWidth(80);
	reset->setFixedWidth(80);
}

void ProgressBarDemo::slotStart()
{
	progressbar->setTotalSteps(1000);

	if(!timer->isActive())
	{
		timer->start(1);
		start->setText( "&Pause" );
	}else{
		timer->stop();
		start->setText( "&Countinue" );
	     }
}

void ProgressBarDemo::slotReset()
{
	timer->stop();
	start->setText( "&Start" );
	start->setEnabled( TRUE )	;

	progressbar->reset();
}

void ProgressBarDemo::slotTimeout()
{
	int p = progressbar->progress();

	if( p == progressbar->totalSteps() )
	{
		start->setText( "&Start" );
		start->setEnabled( FALSE );
		return;
	}
	progressbar->setProgress( ++p );
}

int main(int argc, char **argv)
{
	QApplication app(argc, argv);
	app.setFont( QFont("Times", 16, QFont::Normal) );

	ProgressBarDemo progressbardemo;
	progressbardemo.resize(320, 80);
	progressbardemo.setCaption( "ProgressBar DEMO" );

	app.setMainWidget(&progressbardemo);
	progressbardemo.show();

	return app.exec();
}