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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "maskedmousearea.h"
#include <QStyleHints>
#include <QGuiApplication>
#include <qqmlfile.h>
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(QQmlFile::urlToLocalFileOrQrc(source));
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->position().toPoint();
emit pressed();
}
void MaskedMouseArea::mouseReleaseEvent(QMouseEvent *event)
{
setPressed(false);
emit released();
const int threshold = qApp->styleHints()->startDragDistance();
const bool isClick = (threshold >= qAbs(event->position().toPoint().x() - m_pressPoint.x()) &&
threshold >= qAbs(event->position().toPoint().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);
}
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