Unity 8
globalfunctions.cpp
1 /*
2  * Copyright 2015 Canonical Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU Lesser General Public License as published by
6  * the Free Software Foundation; version 3.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU Lesser General Public License for more details.
12  *
13  * You should have received a copy of the GNU Lesser General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16 
17 #include "globalfunctions.h"
18 
19 #include <QQmlEngine>
20 #include <private/qquickitem_p.h>
21 
22 GlobalFunctions::GlobalFunctions(QObject *parent)
23  : QObject(parent)
24 {
25 }
26 
27 QQuickItem *GlobalFunctions::itemAt(QQuickItem* parent, int x, int y, QJSValue matcher)
28 {
29  if (!parent) return nullptr;
30  QList<QQuickItem *> children = QQuickItemPrivate::get(parent)->paintOrderChildItems();
31 
32  for (int i = children.count() - 1; i >= 0; --i) {
33  QQuickItem *child = children.at(i);
34 
35  // Map coordinates to the child element's coordinate space
36  QPointF point = parent->mapToItem(child, QPointF(x, y));
37  if (child->isVisible() && point.x() >= 0
38  && child->width() >= point.x()
39  && point.y() >= 0
40  && child->height() >= point.y()) {
41  if (!matcher.isCallable()) return child;
42 
43  QQmlEngine* engine = qmlEngine(child);
44  if (!engine) return child;
45 
46  QJSValue newObj = engine->newQObject(child);
47  if (matcher.call(QJSValueList() << newObj).toBool()) {
48  return child;
49  }
50  }
51  }
52  return nullptr;
53 }