qt-creator/tests/manual/progressmanager/roundprogress.cpp

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#include "roundprogress.h"
#include "multitask.h"
#include "runextensions.h"

roundprogress::roundprogress(QWidget *parent)
    : QWidget(parent), task(MyInternalTask(true)), task2(MyInternalTask(false))
{
    ui.setupUi(this);
    ui.progressButton->setIcon(QIcon("find.png"));
    connect(ui.startButton, SIGNAL(clicked()), this, SLOT(start()));
    connect(ui.startButton2, SIGNAL(clicked()), this, SLOT(start2()));
    connect(ui.startBothButton, SIGNAL(clicked()), this, SLOT(start3()));
    ui.startButton->setFocus();
}

void roundprogress::start()
{
    if (future.isRunning())
        return;
    future = QtConcurrent::run(&MyInternalTask::run, &task);
    ui.progressButton->setFuture(future);
}

void roundprogress::start2()
{
    if (future.isRunning())
        return;
    future = QtConcurrent::run(&MyInternalTask::run, &task2);
    ui.progressButton->setFuture(future);
}

void roundprogress::start3()
{
    if (future.isRunning())
        return;
    future = QtConcurrent::run(&MyInternalTask::run, QList<MyInternalTask*>() << &task2 << &task);
    ui.progressButton->setFuture(future);
}