1 files changed, 65 insertions, 0 deletions
diff --git a/tests/manual/examples/widgets/wiggly/wigglywidget.cpp b/tests/manual/examples/widgets/wiggly/wigglywidget.cpp
new file mode 100644
index 0000000000..3e686a67cf
--- /dev/null
+++ b/tests/manual/examples/widgets/wiggly/wigglywidget.cpp
@@ -0,0 +1,65 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "wigglywidget.h"
+
+#include <QFontMetrics>
+#include <QPainter>
+#include <QTimerEvent>
+
+//! [0]
+WigglyWidget::WigglyWidget(QWidget *parent)
+    : QWidget(parent), step(0)
+{
+    setBackgroundRole(QPalette::Midlight);
+    setAutoFillBackground(true);
+
+    QFont newFont = font();
+    newFont.setPointSize(newFont.pointSize() + 20);
+    setFont(newFont);
+
+    timer.start(60, this);
+}
+//! [0]
+
+//! [1]
+void WigglyWidget::paintEvent(QPaintEvent * /* event */)
+//! [1] //! [2]
+{
+    static constexpr int sineTable[16] = {
+        0, 38, 71, 92, 100, 92, 71, 38, 0, -38, -71, -92, -100, -92, -71, -38
+    };
+
+    QFontMetrics metrics(font());
+    int x = (width() - metrics.horizontalAdvance(text)) / 2;
+    int y = (height() + metrics.ascent() - metrics.descent()) / 2;
+    QColor color;
+//! [2]
+
+//! [3]
+    QPainter painter(this);
+//! [3] //! [4]
+    int offset = 0;
+    for (char32_t codePoint : text.toUcs4()) {
+        int index = (step + offset++) % 16;
+        color.setHsv((15 - index) * 16, 255, 191);
+        painter.setPen(color);
+        QString symbol = QString::fromUcs4(&codePoint, 1);
+        painter.drawText(x, y - ((sineTable[index] * metrics.height()) / 400), symbol);
+        x += metrics.horizontalAdvance(symbol);
+    }
+}
+//! [4]
+
+//! [5]
+void WigglyWidget::timerEvent(QTimerEvent *event)
+//! [5] //! [6]
+{
+    if (event->timerId() == timer.timerId()) {
+        ++step;
+        update();
+    } else {
+        QWidget::timerEvent(event);
+    }
+//! [6]
+}