Send DynamicPropertyChange event only when value is changed.

According to docs DynamicPropertyChange event should be sent from
setProperty function only when property is added, removed or
changed.

Change-Id: I080a27a4119a63580b03172f4b5b367338c6f440
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/corelib/kernel/qobject.cpp b/src/corelib/kernel/qobject.cpp
index a027f82f82..ff7a79d587 100644
--- a/src/corelib/kernel/qobject.cpp
+++ b/src/corelib/kernel/qobject.cpp
@@ -3809,6 +3809,8 @@ bool QObject::setProperty(const char *name, const QVariant &value)
                 d->extraData->propertyNames.append(name);
                 d->extraData->propertyValues.append(value);
             } else {
+                if (value == d->extraData->propertyValues.at(idx))
+                    return false;
                 d->extraData->propertyValues[idx] = value;
             }
         }