1 files changed, 92 insertions, 0 deletions
diff --git a/examples/widgetbinding/wigglywidget.cpp b/examples/widgetbinding/wigglywidget.cpp
new file mode 100644
index 000000000..6fdc65f39
--- /dev/null
+++ b/examples/widgetbinding/wigglywidget.cpp
@@ -0,0 +1,92 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "wigglywidget.h"
+
+#include <QtGui/QFontMetrics>
+#include <QtGui/QPainter>
+#include <QtCore/QTimerEvent>
+
+//! [0]
+WigglyWidget::WigglyWidget(QWidget *parent)
+    : QWidget(parent)
+{
+    setBackgroundRole(QPalette::Midlight);
+    setAutoFillBackground(true);
+
+    QFont newFont = font();
+    newFont.setPointSize(newFont.pointSize() + 20);
+    setFont(newFont);
+}
+//! [0]
+
+//! [1]
+void WigglyWidget::paintEvent(QPaintEvent * /* event */)
+//! [1] //! [2]
+{
+    if (m_text.isEmpty())
+        return;
+    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(m_text)) / 2;
+    int y = (height() + metrics.ascent() - metrics.descent()) / 2;
+    QColor color;
+//! [2]
+
+//! [3]
+    QPainter painter(this);
+//! [3] //! [4]
+    int offset = 0;
+    const auto codePoints = m_text.toUcs4();
+    for (char32_t codePoint : codePoints) {
+        const int index = (m_step + offset++) % 16;
+        color.setHsv((15 - index) * 16, 255, 191);
+        painter.setPen(color);
+        QString symbol = QString::fromUcs4(&codePoint, 1);
+        const int dy = (sineTable[index] * metrics.height()) / 400;
+        painter.drawText(x, y - dy, symbol);
+        x += metrics.horizontalAdvance(symbol);
+    }
+}
+//! [4]
+
+//! [5]
+void WigglyWidget::timerEvent(QTimerEvent *event)
+//! [5] //! [6]
+{
+    if (event->timerId() == m_timer.timerId()) {
+        ++m_step;
+        update();
+    } else {
+        QWidget::timerEvent(event);
+    }
+//! [6]
+}
+
+QString WigglyWidget::text() const
+{
+    return m_text;
+}
+
+void WigglyWidget::setText(const QString &newText)
+{
+    m_text = newText;
+}
+
+bool WigglyWidget::isRunning() const
+{
+    return m_timer.isActive();
+}
+
+void WigglyWidget::setRunning(bool r)
+{
+    if (r == isRunning())
+        return;
+    if (r)
+        m_timer.start(60, this);
+    else
+        m_timer.stop();
+}