Allow mouse interaction with 0 opacity items.

Don't filter event delivery to items with 0 opacity, and update the
documentation the for opacity, visible and enabled properties and how
each affects event delivery.

Task-number: QTBUG-19193
Change-Id: Id48e4af763c9a7bbcc13b303342d303155dcadc9
Reviewed-by: Jan-Arve Sæther <jan-arve.saether@nokia.com>
Reviewed-by: Martin Jones <martin.jones@nokia.com>

1 files changed, 1 insertions, 10 deletions

diff --git a/src/quick/items/qquickcanvas.cpp b/src/quick/items/qquickcanvas.cpp
index a242ca1111..7e0f482ee0 100644
--- a/src/quick/items/qquickcanvas.cpp
+++ b/src/quick/items/qquickcanvas.cpp
@@ -1146,8 +1146,6 @@ bool QQuickCanvasPrivate::deliverInitialMousePressEvent(QQuickItem *item, QMouse
     Q_Q(QQuickCanvas);
 
     QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item);
-    if (itemPrivate->opacity() == 0.0)
-        return false;
 
     if (itemPrivate->flags & QQuickItem::ItemClipsChildrenToShape) {
         QPointF p = item->mapFromScene(event->windowPos());
@@ -1306,8 +1304,6 @@ bool QQuickCanvasPrivate::deliverHoverEvent(QQuickItem *item, const QPointF &sce
                                          Qt::KeyboardModifiers modifiers, bool &accepted)
 {
     QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item);
-    if (itemPrivate->opacity() == 0.0)
-        return false;
 
     if (itemPrivate->flags & QQuickItem::ItemClipsChildrenToShape) {
         QPointF p = item->mapFromScene(scenePos);
@@ -1374,8 +1370,6 @@ bool QQuickCanvasPrivate::deliverWheelEvent(QQuickItem *item, QWheelEvent *event
 {
     Q_Q(QQuickCanvas);
     QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item);
-    if (itemPrivate->opacity() == 0.0)
-        return false;
 
     if (itemPrivate->flags & QQuickItem::ItemClipsChildrenToShape) {
         QPointF p = item->mapFromScene(event->posF());
@@ -1514,9 +1508,6 @@ bool QQuickCanvasPrivate::deliverTouchPoints(QQuickItem *item, QTouchEvent *even
 {
     QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item);
 
-    if (qFuzzyIsNull(itemPrivate->opacity()))
-        return false;
-
     if (itemPrivate->flags & QQuickItem::ItemClipsChildrenToShape) {
         for (int i=0; i<newPoints.count(); i++) {
             QPointF p = item->mapFromScene(newPoints[i].scenePos());
@@ -1770,7 +1761,7 @@ bool QQuickCanvasPrivate::deliverDragEvent(QQuickDragGrabber *grabber, QQuickIte
     Q_Q(QQuickCanvas);
     bool accepted = false;
     QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item);
-    if (itemPrivate->opacity() == 0.0 || !item->isVisible() || !item->isEnabled())
+    if (!item->isVisible() || !item->isEnabled())
         return false;
 
     QPointF p = item->mapFromScene(event->pos());