diff options
| author | Robin Burchell <robin.burchell@viroteck.net> | 2016-07-08 13:25:02 +0200 |
|---|---|---|
| committer | Jani Heikkinen <jani.heikkinen@qt.io> | 2016-11-30 08:31:52 +0000 |
| commit | 3b4f00ecb54432f514f184c251a316896a88f91a (patch) | |
| tree | f39299a24451d8e7f7beb17eb314247d5481c2fc /src/imports/layouts/qquicklayout_p.h | |
| parent | 39496a40748be1d60c909ba679c45c788ec6412f (diff) | |
Layouts: Use QQuickItemChangeListener for more things
Signal connections are expensive: even with qmlobject_connect, there's a bunch
of memory allocation. By avoiding the signal connections, we can do the same
thing essentially, a little faster.
This gives me another 15-20 RowLayout instances per frame when testing with
RowLayout containing 5 Rectangles on qmlbench (from ~139 to ~155 ops/frame).
Change-Id: I4448a28128dc251e40b6b06d642bae716af212f4
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>
Diffstat (limited to 'src/imports/layouts/qquicklayout_p.h')
| -rw-r--r-- | src/imports/layouts/qquicklayout_p.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/imports/layouts/qquicklayout_p.h b/src/imports/layouts/qquicklayout_p.h index c7f04c1fed..eece6f8658 100644 --- a/src/imports/layouts/qquicklayout_p.h +++ b/src/imports/layouts/qquicklayout_p.h @@ -99,6 +99,10 @@ public: /* QQuickItemChangeListener */ void itemSiblingOrderChanged(QQuickItem *item) Q_DECL_OVERRIDE; + void itemImplicitWidthChanged(QQuickItem *item) Q_DECL_OVERRIDE; + void itemImplicitHeightChanged(QQuickItem *item) Q_DECL_OVERRIDE; + void itemDestroyed(QQuickItem *item) Q_DECL_OVERRIDE; + void itemVisibilityChanged(QQuickItem *item) Q_DECL_OVERRIDE; protected: void updatePolish() Q_DECL_OVERRIDE; |