On 17 Jun 2014, at 04:14, Nancy Zou <nancy....@csr.com> wrote: > Dear All > I know Qt5.2 have a big performance increase, but I don’t find my qml > application have some performance increase compared with Qt5.0. > I write some of my qml like that: > ... > Sometimes I want some item invisible, so I set opacity to 0. But I know > visible: false can make item invisible too. Which one should better to choose?
opacity==0 and visible==false are equivalent in terms of graphics. Both will result in the item being removed from the scene graph and not rendered. > If the opacity is 0, does the item still drawing? I suspect it’s why my qml > can’t run good on Qt5.2. > I want to ask how to write a good qml file to make full use of Qt5.2 > optimization. http://qt-project.org/doc/qt-5/qtquick-visualcanvas-scenegraph-renderer.html > > Thank you. > Best Regards > Nancy > > > > Member of the CSR plc group of companies. CSR plc registered in England and > Wales, registered number 4187346, registered office Churchill House, > Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom > More information can be found at www.csr.com. Keep up to date with CSR on our > technical blog or CSR people blog, YouTube,Facebook or follow us on Twitter > at twitter.com/CSR_plc. > New for 2014, you can now access the wide range of products powered by aptX. > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
