QQuickWindow: deliver updates to handlers even if they don't grab

The "weak grab" concept depends on this.
First we deliver to grabbers, then we deliver to non-grabbing handlers
(but not to non-grabbing items).  Avoid re-delivering to grabbing
handlers which already received the same event.

Change-Id: If51e1cd9372e3bed1daea3758e9ef8e37c0ba5e3
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>

1 files changed, 27 insertions, 0 deletions

diff --git a/src/quick/items/qquickevents.cpp b/src/quick/items/qquickevents.cpp
index 0c18cb4104..a68e72b0b7 100644
--- a/src/quick/items/qquickevents.cpp
+++ b/src/quick/items/qquickevents.cpp
@@ -835,6 +835,11 @@ bool QQuickPointerMouseEvent::allPointsAccepted() const {
     return m_mousePoint->isAccepted();
 }
 
+bool QQuickPointerMouseEvent::allPointsGrabbed() const
+{
+    return m_mousePoint->grabber() != nullptr;
+}
+
 QMouseEvent *QQuickPointerMouseEvent::asMouseEvent(const QPointF &localPos) const
 {
     auto event = static_cast<QMouseEvent *>(m_event);
@@ -854,6 +859,11 @@ void QQuickPointerMouseEvent::clearGrabbers() const {
     m_mousePoint->setGrabberItem(nullptr);
 }
 
+bool QQuickPointerMouseEvent::hasGrabber(const QQuickPointerHandler *handler) const
+{
+    return m_mousePoint->grabber() == handler;
+}
+
 bool QQuickPointerMouseEvent::isPressEvent() const
 {
     auto me = static_cast<QMouseEvent*>(m_event);
@@ -869,6 +879,15 @@ bool QQuickPointerTouchEvent::allPointsAccepted() const {
     return true;
 }
 
+bool QQuickPointerTouchEvent::allPointsGrabbed() const
+{
+    for (int i = 0; i < m_pointCount; ++i) {
+        if (!m_touchPoints.at(i)->grabber())
+            return false;
+    }
+    return true;
+}
+
 QVector<QObject *> QQuickPointerTouchEvent::grabbers() const
 {
     QVector<QObject *> result;
@@ -887,6 +906,14 @@ void QQuickPointerTouchEvent::clearGrabbers() const {
         point->setGrabber(nullptr);
 }
 
+bool QQuickPointerTouchEvent::hasGrabber(const QQuickPointerHandler *handler) const
+{
+    for (auto point: m_touchPoints)
+        if (point->grabber() == handler)
+            return true;
+    return false;
+}
+
 bool QQuickPointerTouchEvent::isPressEvent() const
 {
     return static_cast<QTouchEvent*>(m_event)->touchPointStates() & Qt::TouchPointPressed;