On 3 March 2015 at 18:45, Rutledge Shawn <shawn.rutle...@theqtcompany.com> wrote:
> > On 2 Mar 2015, at 18:38, Ben Lau <xben...@gmail.com> wrote: > > > > > On 2 March 2015 at 19:38, Rutledge Shawn < > shawn.rutle...@theqtcompany.com> wrote: > > > > > > Did you try the photosurface example? > > > > It’s getting some new features in 5.5, because pinch zooming and > flicking will both work better on OS X than they have in the past, with a > trackpad. Of course it’s not a typical gallery app for mobile devices, but > it does involve using pinching and flicking together. > > > > > > Hi Rutledge, > > > > Thank you for your reply. I have tried the photosurface example on > desktop only (It don't work on iOS). > > It should be able to run on iOS I think, but being able to read photos > from the gallery will be a new feature in 5.5 (because there is no > permission to do that by default on iOS). Is that what you mean doesn’t > work? > > The application will be frozen in the splash screen. The only message printed is "QMetaObject::indexOfSignal: signal visibleChanged(bool) from QQuickWindow redefined in QQuickWindowQmlImpl" Verified with Qt 5.4.1 And just tested with Android , it is working. > > According to the code , it use PinchArea + MouseArea instead of > PinchArea + Flickable. > > There is a Flickable to flick the whole surface in 5.5. > oh , you mean the example code in 5.5 dev branch? I just tested with the code bundled with Qt 5.4.1. It don't contains Flickable. > > > The combination could support pinching and flicking on mobile. However, > it lack of support for physic simulation and function like returnToBound() > that provided by Flickable. > > > > For example , after user has swiped on screen and released the finger, > the object should still keep moving in a short time. The time should depend > on how fast of the swipe gesture. > > > > Will it have any existing component that can help to build similar thing > without Flickable? > > > > I think the returnToBound() function could be made by SpringAnimation > but no idea how to implement the physic simulation. > > You want to “fling” the photos individually? That’s an interesting idea, > but I don’t think we provide an easy way to do it, since it’s not something > most UIs would need. > But in fact Flickable has provided the "fling" gesture already. And commonly used in ListView for scrolling. > > You might try the Box2D QML bindings. > https://github.com/qml-box2d/qml-box2d > > Or you can try using MultiPointTouchArea, which will give you velocity at > each touch point, and start an animation when the finger is released. It > might be nice if MouseArea provided drag velocity, but it doesn’t. > > I see. Thank you!
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