Add QQuickPointerEvent::grabbers

Returns a list of all items that grabbed a point of the event before.

Change-Id: Ifa7e6cc7486c4e1a7446a6bf3d4e62d19983ecf7
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io>

2 files changed, 23 insertions, 0 deletions

diff --git a/src/quick/items/qquickevents.cpp b/src/quick/items/qquickevents.cpp
index 96eb59f518..ea1a6e263e 100644
--- a/src/quick/items/qquickevents.cpp
+++ b/src/quick/items/qquickevents.cpp
@@ -594,6 +594,14 @@ QMouseEvent *QQuickPointerMouseEvent::asMouseEvent() const
     return static_cast<QMouseEvent *>(m_event);
 }
 
+QVector<QQuickItem *> QQuickPointerMouseEvent::grabbers() const
+{
+    QVector<QQuickItem *> result;
+    if (QQuickItem *grabber = m_mousePoint->grabber())
+        result << grabber;
+    return result;
+}
+
 bool QQuickPointerTouchEvent::allPointsAccepted() const {
     for (int i = 0; i < m_pointCount; ++i) {
         if (!m_touchPoints.at(i)->isAccepted())
@@ -602,6 +610,18 @@ bool QQuickPointerTouchEvent::allPointsAccepted() const {
     return true;
 }
 
+QVector<QQuickItem *> QQuickPointerTouchEvent::grabbers() const
+{
+    QVector<QQuickItem *> result;
+    for (auto point : qAsConst(m_touchPoints)) {
+        if (QQuickItem *grabber = point->grabber()) {
+            if (!result.contains(grabber))
+                result << grabber;
+        }
+    }
+    return result;
+}
+
 /*!
     \internal
     Populate the reusable synth-mouse event from one touchpoint.
diff --git a/src/quick/items/qquickevents_p_p.h b/src/quick/items/qquickevents_p_p.h
index 3cec7c782a..59b211e43e 100644
--- a/src/quick/items/qquickevents_p_p.h
+++ b/src/quick/items/qquickevents_p_p.h
@@ -364,6 +364,7 @@ public: // helpers for C++ only (during event delivery)
     virtual int pointCount() const = 0;
     virtual QQuickEventPoint *point(int i) const = 0;
     virtual QQuickEventPoint *pointById(quint64 pointId) const = 0;
+    virtual QVector<QQuickItem *> grabbers() const = 0;
 
 protected:
 
@@ -391,6 +392,7 @@ public:
     QQuickEventPoint *point(int i) const override;
     QQuickEventPoint *pointById(quint64 pointId) const override;
     bool allPointsAccepted() const override;
+    QVector<QQuickItem *> grabbers() const override;
 
     QMouseEvent *asMouseEvent() const;
 
@@ -413,6 +415,7 @@ public:
     QQuickEventPoint *pointById(quint64 pointId) const override;
     const QTouchEvent::TouchPoint *touchPointById(int pointId) const;
     bool allPointsAccepted() const override;
+    QVector<QQuickItem *> grabbers() const override;
 
     QMouseEvent *syntheticMouseEvent(int pointID, QQuickItem *relativeTo) const;
     QTouchEvent *touchEventForItem(const QList<const QQuickEventPoint *> &newPoints, QQuickItem *relativeTo) const;