1 files changed, 141 insertions, 0 deletions
diff --git a/examples/quick/customitems/maskedmousearea/maskedmousearea.cpp b/examples/quick/customitems/maskedmousearea/maskedmousearea.cpp
new file mode 100644
index 0000000000..3f872a66f6
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+++ b/examples/quick/customitems/maskedmousearea/maskedmousearea.cpp
@@ -0,0 +1,141 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "maskedmousearea.h"
+
+#include <QStyleHints>
+#include <QGuiApplication>
+
+
+MaskedMouseArea::MaskedMouseArea(QQuickItem *parent)
+    : QQuickItem(parent),
+      m_pressed(false),
+      m_alphaThreshold(0.0),
+      m_containsMouse(false)
+{
+    setAcceptHoverEvents(true);
+    setAcceptedMouseButtons(Qt::LeftButton);
+}
+
+void MaskedMouseArea::setPressed(bool pressed)
+{
+    if (m_pressed != pressed) {
+        m_pressed = pressed;
+        emit pressedChanged();
+    }
+}
+
+void MaskedMouseArea::setContainsMouse(bool containsMouse)
+{
+    if (m_containsMouse != containsMouse) {
+        m_containsMouse = containsMouse;
+        emit containsMouseChanged();
+    }
+}
+
+void MaskedMouseArea::setMaskSource(const QUrl &source)
+{
+    if (m_maskSource != source) {
+        m_maskSource = source;
+        m_maskImage = QImage(source.toLocalFile());
+        emit maskSourceChanged();
+    }
+}
+
+void MaskedMouseArea::setAlphaThreshold(qreal threshold)
+{
+    if (m_alphaThreshold != threshold) {
+        m_alphaThreshold = threshold;
+        emit alphaThresholdChanged();
+    }
+}
+
+bool MaskedMouseArea::contains(const QPointF &point) const
+{
+    if (!QQuickItem::contains(point) || m_maskImage.isNull())
+        return false;
+
+    QPoint p = point.toPoint();
+
+    if (p.x() < 0 || p.x() >= m_maskImage.width() ||
+        p.y() < 0 || p.y() >= m_maskImage.height())
+        return false;
+
+    qreal r = qBound<int>(0, m_alphaThreshold * 255, 255);
+    return qAlpha(m_maskImage.pixel(p)) > r;
+}
+
+void MaskedMouseArea::mousePressEvent(QMouseEvent *event)
+{
+    setPressed(true);
+    m_pressPoint = event->pos();
+    emit pressed();
+}
+
+void MaskedMouseArea::mouseReleaseEvent(QMouseEvent *event)
+{
+    setPressed(false);
+    emit released();
+
+    const int threshold = qApp->styleHints()->startDragDistance();
+    const bool isClick = (threshold >= qAbs(event->x() - m_pressPoint.x()) &&
+                          threshold >= qAbs(event->y() - m_pressPoint.y()));
+
+    if (isClick)
+        emit clicked();
+}
+
+void MaskedMouseArea::mouseUngrabEvent()
+{
+    setPressed(false);
+    emit canceled();
+}
+
+void MaskedMouseArea::hoverEnterEvent(QHoverEvent *event)
+{
+    Q_UNUSED(event);
+    setContainsMouse(true);
+}
+
+void MaskedMouseArea::hoverLeaveEvent(QHoverEvent *event)
+{
+    Q_UNUSED(event);
+    setContainsMouse(false);
+}