Add setContextProperties()

Setting all properties in one batch avoids unnecessary
refreshing of expressions and is therefore a lot
faster if there are many expressions in the context.

In an example I created it takes 500ms to set 10 context properties
using setContextProperty() and it takes about 150ms to set the
context properties using setContextProperties.

Change-Id: Ic7cf03cda292b316198f37f963b61a2388a288c9
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/auto/qml/qqmlcontext/tst_qqmlcontext.cpp b/tests/auto/qml/qqmlcontext/tst_qqmlcontext.cpp
index 5f57b9ebb0..5dfbd2e522 100644
--- a/tests/auto/qml/qqmlcontext/tst_qqmlcontext.cpp
+++ b/tests/auto/qml/qqmlcontext/tst_qqmlcontext.cpp
@@ -47,6 +47,7 @@ private slots:
     void engineMethod();
     void parentContext();
     void setContextProperty();
+    void setContextProperties();
     void setContextObject();
     void destruction();
     void idAsContextProperty();
@@ -363,6 +364,32 @@ void tst_qqmlcontext::setContextProperty()
     }
 }
 
+void tst_qqmlcontext::setContextProperties()
+{
+    QQmlContext ctxt(&engine);
+
+    TestObject obj1;
+    obj1.setA(3345);
+    TestObject obj2;
+    obj2.setA(-19);
+
+    QVector<QQmlContext::PropertyPair> properties;
+
+    properties.append({QString("a"), QVariant(10)});
+    properties.append({QString("b"), QVariant(19)});
+    properties.append({QString("d"), QVariant::fromValue<TestObject*>(&obj2)});
+    properties.append({QString("c"), QVariant(QString("Hello World!"))});
+    properties.append({QString("e"), QVariant::fromValue<TestObject*>(&obj1)});
+
+    ctxt.setContextProperties(properties);
+
+    TEST_CONTEXT_PROPERTY(&ctxt, a, QVariant(10));
+    TEST_CONTEXT_PROPERTY(&ctxt, b, QVariant(19));
+    TEST_CONTEXT_PROPERTY(&ctxt, c, QVariant(QString("Hello World!")));
+    TEST_CONTEXT_PROPERTY(&ctxt, d.a, QVariant(-19));
+    TEST_CONTEXT_PROPERTY(&ctxt, e.a, QVariant(3345));
+}
+
 void tst_qqmlcontext::setContextObject()
 {
     QQmlContext ctxt(&engine);