Example: rename progressdialog to primecounter and modernize it

The previous example finished way too quickly and provided no real
value in regards to API understanding. Previously, QtConcurrent::map
was used, which was also used in other examples. We are now using
QtConcurrent::filterReduce to demonstrate other functionality.

Task-number: QTBUG-111165
Pick-to: 6.5 6.5.0
Change-Id: Ibd6eb119d0711cddfe8b211d460e9d67d6ce95c3
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>

1 files changed, 0 insertions, 53 deletions

diff --git a/examples/qtconcurrent/progressdialog/main.cpp b/examples/qtconcurrent/progressdialog/main.cpp
deleted file mode 100644
index 702f59e910..0000000000
--- a/examples/qtconcurrent/progressdialog/main.cpp
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#include <QtWidgets>
-#include <QtConcurrent>
-
-#include <functional>
-
-using namespace QtConcurrent;
-
-int main(int argc, char **argv)
-{
-    QApplication app(argc, argv);
-
-    const int iterations = 20;
-
-    // Prepare the list.
-    QList<int> list;
-    for (int i = 0; i < iterations; ++i)
-        list.append(i);
-
-    // Create a progress dialog.
-    QProgressDialog dialog;
-    dialog.setLabelText(QString("Progressing using %1 thread(s)...").arg(QThread::idealThreadCount()));
-
-    // Create a QFutureWatcher and connect signals and slots.
-    QFutureWatcher<void> futureWatcher;
-    QObject::connect(&futureWatcher, &QFutureWatcher<void>::finished, &dialog, &QProgressDialog::reset);
-    QObject::connect(&dialog, &QProgressDialog::canceled, &futureWatcher, &QFutureWatcher<void>::cancel);
-    QObject::connect(&futureWatcher,  &QFutureWatcher<void>::progressRangeChanged, &dialog, &QProgressDialog::setRange);
-    QObject::connect(&futureWatcher, &QFutureWatcher<void>::progressValueChanged,  &dialog, &QProgressDialog::setValue);
-
-    // Our function to compute
-    std::function<void(int&)> spin = [](int &iteration) {
-        const int work = 1000 * 1000 * 40;
-        volatile int v = 0;
-        for (int j = 0; j < work; ++j)
-            ++v;
-
-        qDebug() << "iteration" << iteration << "in thread" << QThread::currentThreadId();
-    };
-
-    // Start the computation.
-    futureWatcher.setFuture(QtConcurrent::map(list, spin));
-
-    // Display the dialog and start the event loop.
-    dialog.exec();
-
-    futureWatcher.waitForFinished();
-
-    // Query the future to check if was canceled.
-    qDebug() << "Canceled?" << futureWatcher.future().isCanceled();
-}