On 3 November 2015 at 23:47, Edward Sutton <edward.sut...@subsite.com> wrote:
> On Nov 3, 2015, at 4:24 PM, Federico Buti <fed.b...@gmail.com> wrote: > > > > > On 3 November 2015 at 22:30, Edward Sutton <edward.sut...@subsite.com> > wrote: > >> >> > On Nov 3, 2015, at 2:11 PM, Jason H <jh...@gmx.com> wrote: >> > >> > >> > >> >> Sent: Tuesday, November 03, 2015 at 10:12 AM >> >> From: "Edward Sutton" <edward.sut...@subsite.com> >> >> To: "Qt Interest" <interest@qt-project.org> >> >> Subject: [Interest] Qt interfacing to Android native UI ? >> >> >> >> I know I can use native iOS UI by mixing Objective-C++ and C++ in the >> same *.mm file. >> >> >> >> I have done a little Android JNI. Are there any examples for >> interfacing to Android native UI elements? >> >> >> >> I need to create a UI picker for manually entering GPS latitude and >> longitude in degrees, or degrees, minutes, seconds for a widgets app. I >> expect it will be hard to make a touch usable widget UI picker. Developing >> a native interface may take similar amount of time but result will be much >> superior. >> > >> > >> > >Define "much superior”? >> >> What the user expects. True native touch UI. Responsive and fast. >> >> > >> > >Don't forget QML, which I think is the bee's knees. And then you have >> one codebase for iOS and Android and Desktop, which to me is vastly >> superior. >> >> Does QML have a numeric picker wheel ui element? >> > > >Since Qt 5.5 Tumbler > <http://doc.qt.io/qt-5/qml-qtquick-extras-tumbler.html> is free. > > > I just built and ran the Qt Quick Enterprise Controls and I saw tumbler. > I am glad it is free for others to use too. > > The PieMenu looked great too. > > > >Anyhow writing one in QML is quite easy using a PathView. Here is a > component > > > That was one of my concerns about QML. Initially it looks like you could > only use what Qt had created for you, If something like a tumbler did not > exist I assumed you were out-of-luck. I need to research PathView and what > it takes to create a new custom control. > There are many open source projects out there with free components (look at Papyr material library <https://github.com/papyros/qml-material>. For what concerns PathView you can have a look to this <http://pastebin.com/embed_js.php?i=YnzFubvA> example of mine. Sure the code is not the most beautiful but at least is a working example of a date picker. > >> I have wanted to try creating UI elements in QML then display them in a >> widget from my C++ Qt widget app. I do not know if this is possible; >> launching a QML ui then and receiving what the user selects from the QML >> UI. It may be worth the effort. > > > >> If I could mix some QML with my widget app it could be a better solution >> compared to writing (and maintaining) two (2) native UI numeric pickers, >> one for Android, and one for iOS. > > >> So far I have one Qt widget codebase supporting Android, iOS, Linux, OS >> X, and Windows desktops except for a few things like Bluetooth, sending >> email, UIAlertView ( QMessageBox looks terrible on iOS ) and such. If I >> start adding native UI interfaces for Android and iOS I start to lose >> benefits of Qt. >> > > >Mixing Qt Widget and QML is possible. Look at this blogpost > <http://www.ics.com/blog/combining-qt-widgets-and-qml-qwidgetcreatewindowcontainer> > . > > > I just ran across that example. It worked once I put the QML file into a > resource. However that example does not interact with C++. I was hoping > to find an example that would demonstrate how I could read the QML state > from C++ ( or visa versa ). > > I assume ta QML toggle button could raise a toggled signal that a C++ > handler could react to? > > Or C++ could change the state of the QML toggle button? > Well, C++ to QML interaction is possible as well as the other way around. There are many resources available online. I have NO experience with Widget-mixed code so I can tell for that in detail. Anyhow, you should start from the resources provided by Sze Howe Koh and also have a look to the usage of "objectName" discussed here <http://doc.qt.io/qt-5/qtqml-cppintegration-interactqmlfromcpp.html#accessing-members-of-a-qml-object-type-from-c> (and to that page in general). > Thanks Federico! > > -Ed > You're welcome. :) F. > Cheers, > F. > > >> >> -Ed >> >> This email and any files transmitted with it from The Charles Machine >> Works, Inc. are confidential and intended solely for the use of the >> individual or entity to which they are addressed. If you have received this >> email in error please notify the sender. Our company accepts no liability >> for the contents of this email, or for the consequences of any actions >> taken on the basis of the information provided, unless that information is >> subsequently confirmed in writing. 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