Optimize listmodel and allow nested elements from worker script.

Added support for nested listmodels when used from a worker script
thread. Optimized the implementation of ListModel, especially the
performance of appending a large number of items. Added a batch
append mode (with an array of JS objects) to reduce the overhead
of calling from JS into native code for each append operation.

Task-number:QTBUG-21508
Change-Id: I07b381dc3e8200d92d6e0af458df8850d78b510f
Reviewed-by: Martin Jones <martin.jones@nokia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/tests/auto/declarative/qdeclarativelistmodel/data/workerremoveelement.js b/tests/auto/declarative/qdeclarativelistmodel/data/workerremoveelement.js
new file mode 100644
index 0000000000..cb9dfa66aa
--- /dev/null
+++ b/tests/auto/declarative/qdeclarativelistmodel/data/workerremoveelement.js
@@ -0,0 +1,8 @@
+WorkerScript.onMessage = function(msg) {
+    if (msg.action == 'removeItem') {
+        msg.model.remove(0);
+    } else if (msg.action == 'dosync') {
+        msg.model.sync();
+    }
+    WorkerScript.sendMessage({'done': true})
+}