On Wed, Oct 12, 2011 at 9:52 PM, Ville M. Vainio <[email protected]> wrote:
> It's something for you to benchmark before writing the application, I > guess. > > On Wed, Oct 12, 2011 at 10:44 PM, qtnext <[email protected]> wrote: > > so I can add for example 10 000 Items and Scenegraph will do all > > necessary cliping (for example graphicsView Chip demo will works ? just > > simply porting to qml/SceneGraph ?) > > > > > > Le 12/10/2011 21:38, Ville M. Vainio a écrit : > >> If graphics view delivered acceptable performance, QML will as too - > >> especially with Qt5, through the virtue of Scene Graph. If your > >> scenario would more naturally be done with QPainter, you can use > >> QSGPantedItem. > >> > >> On Wed, Oct 12, 2011 at 9:43 PM, qtnext<[email protected]> wrote: > >>> Yes but How to port the timeline (imagine porting blender3d to QML ?) : > >>> I was using QGraphicsView : If I have a lot of elements will it be > smooth ? > >>> > >>> > >>> Le 09/10/2011 17:24, Ville M. Vainio a écrit : > >>>> - I'm sure there will be a standard tree widget component, it's > >>>> mandatory for any serious toolkit > >>>> > >>>> - You will still be able to do custom drawing with QPainter, > >>>> http://doc.qt.nokia.com/qt5-snapshot/qsgpainteditem.html > >>>> > >>>> - I wouldn't use QAbstractItemModel for small-to-medium size models. > >>>> QML does not mandate (or even encourage) using it by any means. > >>>> > >>>> On Sun, Oct 9, 2011 at 5:28 PM, qtnext<[email protected]> wrote: > >>>>> Hi, > >>>>> > >>>>> I am planning to develop a non linear video system editor (After > Effect, > >>>>> Final Cut Like)... The main Widget of this kind of software is the > >>>>> Timeline (composed of layers, in which you can add key frame, and on > the > >>>>> left panel you can directly set value of the keyframes). you can see > >>>>> the curve between keyframe, hide layers, ... zoom, unzoom, scroll.. > >>>>> > >>>>> > >>>>> - I have develop similar software years ago : first Qt2 or 3 (don't > >>>>> remenber) : using Qpainter and adding removing visible items in the > >>>>> timeline on the fly... > >>>>> > >>>>> - Then I have do that for another software with QGraphicsView : Easy > ! > >>>>> you add all the items in qgraphicsScene And Qt do all the job to > manage > >>>>> the large number of items... I have a QtreeWidget to change property > of > >>>>> each keyframe on the left... It was working fine ! But when you wants > to > >>>>> customize some parts in the QtreeWidget it was not very easy ... > >>>>> > >>>>> - Now I plan to use Qt Quick /Qt5 (I know it's not ready to use now > ... > >>>>> but it's a project for next year !) : > >>>>> I plan to replace all the widgets (QTreeWidget/QgraphicsWidget) by a > Qml > >>>>> and QAbstractModel : it will be more flexible to use javascript, > easier > >>>>> to break rectangular area, effects, .... But How can I do that in > QML > >>>>> efficiently ? I will have a large numbers of items ... In short how > to > >>>>> code what can be easily and efficiently done with QGraphicsView ? > >>>>> > >>>>> _______________________________________________ > >>>>> Qt5-feedback mailing list > >>>>> [email protected] > >>>>> http://lists.qt.nokia.com/mailman/listinfo/qt5-feedback > >>>>> > >>> _______________________________________________ > >>> Qt5-feedback mailing list > >>> [email protected] > >>> http://lists.qt.nokia.com/mailman/listinfo/qt5-feedback > >>> > > > > _______________________________________________ > > Qt5-feedback mailing list > > [email protected] > > http://lists.qt.nokia.com/mailman/listinfo/qt5-feedback > > > _______________________________________________ > Qt5-feedback mailing list > [email protected] > http://lists.qt.nokia.com/mailman/listinfo/qt5-feedback > Could you guys PLEASE quit top posting! Top posting makes it harder for people to easily read back the conversation in a logical manner. Also note: Ville M. Vainio and qtnext, with every mail you you make i get: "This message may not have been sent by: <<your_email>> Learn more Report phishing" Somehow gmail can't confirm that you are.. you :p Regards
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