1 files changed, 111 insertions, 0 deletions
diff --git a/tests/manual/peeker/main.cpp b/tests/manual/peeker/main.cpp
new file mode 100644
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+++ b/tests/manual/peeker/main.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <QtX11Extras/QX11Info>
+
+class IntensivePainter : public QWindow
+{
+public:
+    IntensivePainter() : m_backingStore(new QBackingStore(this))
+    { setGeometry(100, 100, 900, 600); }
+
+protected:
+    bool interrupted() const { return m_stopPainting; }
+    void stopPainting() { m_stopPainting = true; }
+    void beginPaining() { m_stopPainting = false; }
+
+    void exposeEvent(QExposeEvent *)
+    {
+        bool useGreenColor = false;
+        QRect rect(0, 0, width(), height());
+        m_backingStore->resize(QSize(width(), height()));
+
+        qint32 peekerId = QX11Info::generatePeekerId();
+        if (peekerId == -1) {
+            qWarning() << "Internal error: QX11Info::generatePeekerId() returned -1";
+            exit(EXIT_FAILURE);
+        }
+
+        while (!interrupted()) { // Begin a long operation
+            m_backingStore->beginPaint(rect);
+            QPaintDevice *device = m_backingStore->paintDevice();
+            QPainter painter(device);
+            painter.fillRect(rect, useGreenColor ? Qt::green : Qt::red);
+            useGreenColor = !useGreenColor;
+            painter.drawText(rect, Qt::AlignCenter, QStringLiteral("Press any key to exit.\n"
+            "(make sure the window is in focus when testing)\n\n If key press does not "
+            "immediately exit the application,\n then that should be considered a bug/regression."
+            "\n\n A demo might appear frozen to some window managers\n and therefore "
+            "might get grayed out (e.g Unity), this is the expected behavior.\n On KWin, for "
+            "example, this demo does not get grayed out.\n Resizing the window on any system will "
+            "cause rendering artefacts, that is not a bug,\n but simply the way the test is "
+            "implemented."));
+            m_backingStore->endPaint();
+            m_backingStore->flush(rect);
+            QThread::msleep(500); // Reduce the speed of re-painting (blinking)
+
+            QX11Info::peekEventQueue([](xcb_generic_event_t *event, void *data) {
+                bool isKeyPress = (event->response_type & ~0x80) == XCB_KEY_PRESS;
+                if (isKeyPress) {
+                    IntensivePainter *painter = static_cast<IntensivePainter *>(data);
+                    painter->stopPainting();
+                }
+                return isKeyPress;
+            }, this, QX11Info::PeekOption::PeekFromCachedIndex, peekerId);
+        }
+
+        QX11Info::removePeekerId(peekerId);
+        exit(EXIT_SUCCESS);
+    }
+
+private:
+    QBackingStore *m_backingStore;
+    bool m_stopPainting = false;
+};
+
+int main(int argc, char** argv)
+{
+    QGuiApplication app(argc, argv);
+
+    IntensivePainter painterWindow;
+    painterWindow.show();
+
+    return app.exec();
+}