[Interest] Qt interfacing to Android native UI ?
coroberti .
coroberti at gmail.com
Mon Oct 2 19:28:48 CEST 2017
Dear Edward and others,
It seems that my practical experience with making
core business logic in C++-STL without Qt
works well with:
a. Qt-based GUI for Linux, Mac and Windows - it works excellent;
b. Native GUI for iOS and Android.
Unfortunately, Qt at iOS and Android has too many issues to overcome,
just a few to mention:
1. Lack of customizable Edit Menu (Platform menu) at Qt for iOS - at
least for widgets;
2. Broken selection handles at Qt for Android - total mess for widgets
and many issues for QML
Other reasons to mention:
3. Lack of features where I found myself always with JNI+Java or
developing native components in Obj-C
where native Java and Swift are much easier and less time consuming.
Optimistic people would say that the matters are improving... Maybe.
jm4c
Kind regards,
Robert
On Thu, May 5, 2016 at 10:58 PM, Edward Sutton
<edward.sutton at subsite.com> wrote:
> I have not used the project.
>
> My guess one motivating goal would be to reuse the many react-native modules
> that support both Android and iOS ( or one OS or the other ).
>
> Another goal would be to access real native UI components and native API’s.
> While QML looks native-like, for Android or iOS apps, native just feels
> better to the user IMO.
>
> Microsoft is reportedly adding react native support for UWP and claim it
> will support 270 million Windows 10 devices.
>
> https://blogs.windows.com/buildingapps/2016/04/13/react-native-on-the-universal-windows-platform/
>
>
> -Ed
>
> On May 5, 2016, at 9:45 AM, Jason H <jhihn at gmx.com> wrote:
>
> What is the motivation for such a project?
>
> Sent: Thursday, May 05, 2016 at 10:31 AM
> From: "Edward Sutton" <edward.sutton at subsite.com>
> To: "Robert Iakobashvili" <coroberti at gmail.com>
> Cc: "interest at qt-project.org" <interest at qt-project.org>
> Subject: Re: [Interest] Qt interfacing to Android native UI ?
> An interesting project:
>
>
> https://github.com/grassator/react-qml
>
>
> react-qml is a bridge library that allows to use React.js with QML.
>
> Example
>
> Usage of ReactQml is pretty straightforward — the only difference from web
> version is that you need to pass id of the qml item to React.render instead
> of DOM node. For example:
>
> import QtQuick 2.4
> import QtQuick.Controls 1.3
> import "js/ReactQml.js" as React
>
> ApplicationWindow {
> id: root
> title: qsTr("React QML")
> width: 300
> height: 300
> visible: true
>
> function reactRender(x, y) {
> var props = {
> x: 100,
> y: 100,
> width: 100,
> height: 100,
> color: '#000'
> };
> var childProps = {
> x: 25,
> y: 25,
> width: 50,
> height: 50,
> color: '#fff'
> };
> var child = React.createElement(React.Rectangle, childProps);
> React.render(React.createElement(React.Rectangle, props, child),
> root);
> }
>
> Component.onCompleted: {
> reactRender();
> }
> }
>
>
>
> -Ed
>
>
> On May 2, 2016, at 1:50 PM, Robert Iakobashvili <coroberti at gmail.com> wrote:
>
> Dear Ekke,
> Thank you for sharing your experience with
> qt.labs.controls Qt Quick Controls2 in 5.7.
>
> Sure, we'll be reading you blog.
>
> Kind regards,
> Robert
>
>
> On Mon, May 2, 2016 at 8:38 PM, ekke <ekke at ekkes-corner.org> wrote:
>
> I really like the new qt.labs.controls from Qt 5.6 (will become Qt Quick
> Controls2 in 5.7)
> using these lightweight controls together with Material Style (Android) or
> Universal Style (Windows) with light or dark themes and all the new Controls
> (like Drawer) for mobile-app-navigation and also HighDPI Support you can now
> first time ever develop mobile apps with nearly native feeling. (iOS style
> will come later when the new controls are stable)
>
> I prefer to write UI in QML compared with React Native's mix of Markup and
> JS or using Xamarin where you have one language but different code for
> x-platform.
>
> Before leaving QT for mobile apps - give it a try.
> BTW: I'm writing a blog series about my experiences
> https://urldefense.proofpoint.com/v2/url?u=http-3A__j.mp_qt-2Dx&d=CwIGaQ&c=G4BpsyPyB19LB50bn2swXw&r=cAG2c-SQES5P2qb8IW-uwnBOCX_f2qYJIlzenFnoHUc&m=5X_i0s6I6cbSYRP1ZGUPRMZL0OkDR9nmhuR8RAiIems&s=13ftz5U9_dHo8BjIh3RKmuX9DkqPXcAx9ctnx5a0YHA&e=
> and
> I'll develop - as proof of concept - Conference APPs for QtCon and Qt World
> Summit.
>
> ekke
>
> Am 02.05.16 um 20:17 schrieb Robert Iakobashvili:
>
> Dear Edward,
> React Native - good catch.
>
> Thank you so much for sharing this idea
> and your experience!
>
> Kind regards,
> Robert
>
>
> On Mon, May 2, 2016 at 8:08 PM, Edward Sutton <edward.sutton at subsite.com>
> wrote:
>
> On May 1, 2016, at 4:27 AM, Robert Iakobashvili <coroberti at gmail.com> wrote:
>
> Dear Edward,
> What are your conclusions and which direction you decided on
> after your experiments?
>
>
> I never made much progress. While QML looked more "native like” I never felt
> comfortable using it.
>
> I am doing my new iOS and Android development using Facebook's react-native.
> React Native calls native UI from Javascript.
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__facebook.github.io_react-2Dnative_&d=CwIGaQ&c=G4BpsyPyB19LB50bn2swXw&r=cAG2c-SQES5P2qb8IW-uwnBOCX_f2qYJIlzenFnoHUc&m=5X_i0s6I6cbSYRP1ZGUPRMZL0OkDR9nmhuR8RAiIems&s=e9hAWWmY2S0Mo76_ex-_PF0NFk6ccgclP50872TSMfs&e=
>
>
> When it makes sense I select UI components that have counterparts in Android
> and iOS in order to increase code re-use. I have seem claims of 85% code
> re-use and from my experience I do not doubt these claims.
>
> So far, so good...
>
> -Ed
>
>
>
> Thanks,
> Kind regards,
> Robert
>
>
> On Thu, Nov 5, 2015 at 2:40 PM, Edward Sutton <edward.sutton at subsite.com>
> wrote:
>
> Hi Robert,
>
> The approach you outlined below was the one I was considering. Use of common
> C++ business layer, widgets for desktops, iOS native UI, and Android native
> UI.
>
> The Android native UI was my biggest concern.
>
> I am going to continue experimenting with QML for a few more days
>
>
> Hi Ben,
>
> Thank you for sharing your Android UI interfacing code. I will take a look.
>
> Your iOS UI interfacing code was *very* helpful in understanding how to mix
> C++ and Objective-C++ in the same *.mm file. Java seems much more
> challenging to interface to native UI. However all I have done so far is
> simple JNI calls into Java.
>
> Thank you both,
>
> -Ed
>
>
> On Nov 5, 2015, at 1:51 AM, Ben Lau <xbenlau at gmail.com> wrote:
>
>
> Not really a solution for wrapping Android UI in Qt app. But I have already
> developed an image picker with native UI and communication library between
> Qt and Java/Android. May be it could used as example / core framework.
>
> Image Picker
> https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_benlau_quickandroid_blob_DEV_QuickAndroid_ImagePicker.qml&d=CwIBaQ&c=G4BpsyPyB19LB50bn2swXw&r=cAG2c-SQES5P2qb8IW-uwnBOCX_f2qYJIlzenFnoHUc&m=nrrSNDcnq0DATI4qf2zrUTNMu_m6wsOws_Oz0VoTjAU&s=b9qfgeLoPCVjdDxzeFLLLuGl5EwnXG7Gv0sTjZwTjwU&e=
>
> System Dispatcher - Invoke Java/Android function and vice visa without using
> JNI. Data type conversion is handled automatically.
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_benlau_quickandroid_blob_DEV_qasystemdispatcher.h&d=CwIBaQ&c=G4BpsyPyB19LB50bn2swXw&r=cAG2c-SQES5P2qb8IW-uwnBOCX_f2qYJIlzenFnoHUc&m=nrrSNDcnq0DATI4qf2zrUTNMu_m6wsOws_Oz0VoTjAU&s=m04hl55EIBiEA7ELiqTGCj-dyEOx30iqkz2skvOT-rM&e=
>
>
>
> -Ed
>
>
> On Nov 5, 2015, at 1:36 AM, Robert Iakobashvili <coroberti at gmail.com> wrote:
>
> Dear Ed,
> It seems that I have something native for iOS, but not for Android.
>
> I was thinking now about another path to take:
>
> 1. Common layer - with business app logic;
>
> 2. Presentation layer with the below options:
>
> 2.1 Qt Desktop layer to cover Win, Mac and Linux;
> 2.2 iOS-Native;
> 2.3 Android-Native.
>
> Please, update us on your success of co-existence between
> Qt-Widgets and QML and whether after adding QML it is still
> sustains tough memory environment on iOS and low-memory
> Android devices.
>
> Thank you in advance.
>
> Regards,
> Robert
>
>
> On Tue, Nov 3, 2015 at 5:12 PM, Edward Sutton <edward.sutton at subsite.com>
> wrote:
>
> 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.
>
> Thank you for your advice,
>
> -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. Please note that any views or opinions presented in this email
> are solely those of the author and do not necessarily represent those of the
> company. Finally, the recipient should check this email and any attachments
> for the presence of viruses. The company accepts no liability for any damage
> caused by any virus transmitted by this email.
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org
> https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.qt-2Dproject.org_mailman_listinfo_interest&d=CwIBaQ&c=G4BpsyPyB19LB50bn2swXw&r=cAG2c-SQES5P2qb8IW-uwnBOCX_f2qYJIlzenFnoHUc&m=nrrSNDcnq0DATI4qf2zrUTNMu_m6wsOws_Oz0VoTjAU&s=aIs7iOEK4KMToKD_jb-tP9y5aOCs9wfSJ8tXHkjMU1U&e=
>
>
> 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. Please note that any views or opinions presented in this email
> are solely those of the author and do not necessarily represent those of the
> company. Finally, the recipient should check this email and any attachments
> for the presence of viruses. The company accepts no liability for any damage
> caused by any virus transmitted by this email.
>
>
> 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. Please note that any views or opinions presented in this email
> are solely those of the author and do not necessarily represent those of the
> company. Finally, the recipient should check this email and any attachments
> for the presence of viruses. The company accepts no liability for any damage
> caused by any virus transmitted by this email.
>
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org
> https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.qt-2Dproject.org_mailman_listinfo_interest&d=CwIGaQ&c=G4BpsyPyB19LB50bn2swXw&r=cAG2c-SQES5P2qb8IW-uwnBOCX_f2qYJIlzenFnoHUc&m=5X_i0s6I6cbSYRP1ZGUPRMZL0OkDR9nmhuR8RAiIems&s=uqkwZ-luxwKEVRGiNcxeHyJJsLYoSoDf-8BpMtqNlGI&e=
>
>
>
> --
>
> ekke (ekkehard gentz)
>
> independent software architect
> international development native mobile business apps
> BlackBerry 10 | Qt Mobile (Android, iOS)
> workshops - trainings - bootcamps
>
> BlackBerry Elite Developer
> BlackBerry Platinum Enterprise Partner
>
> max-josefs-platz 30, D-83022 rosenheim, germany
> mailto:ekke at ekkes-corner.org
> blog:
> https://urldefense.proofpoint.com/v2/url?u=http-3A__ekkes-2Dcorner.org&d=CwIGaQ&c=G4BpsyPyB19LB50bn2swXw&r=cAG2c-SQES5P2qb8IW-uwnBOCX_f2qYJIlzenFnoHUc&m=5X_i0s6I6cbSYRP1ZGUPRMZL0OkDR9nmhuR8RAiIems&s=ROE9tC5zKiyvW2K7t2UO997CRQQSluLCIoM811REO6I&e=
> apps and more:
> https://urldefense.proofpoint.com/v2/url?u=http-3A__appbus.org&d=CwIGaQ&c=G4BpsyPyB19LB50bn2swXw&r=cAG2c-SQES5P2qb8IW-uwnBOCX_f2qYJIlzenFnoHUc&m=5X_i0s6I6cbSYRP1ZGUPRMZL0OkDR9nmhuR8RAiIems&s=C74B2iQ6kB6KtX4Ox9CndK1CWN7IgAK6EBI6gXq8-ro&e=
>
> twitter: @ekkescorner
> skype: ekkes-corner
> LinkedIn:
> https://urldefense.proofpoint.com/v2/url?u=http-3A__linkedin.com_in_ekkehard_&d=CwIGaQ&c=G4BpsyPyB19LB50bn2swXw&r=cAG2c-SQES5P2qb8IW-uwnBOCX_f2qYJIlzenFnoHUc&m=5X_i0s6I6cbSYRP1ZGUPRMZL0OkDR9nmhuR8RAiIems&s=vAySIiYQSFceQQiKLG1CpgRKNiRU07W2tV1hcwMAy5I&e=
> Steuer-Nr: 156/220/30931 FA Rosenheim, UST-ID: DE189929490
>
>
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org
> https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.qt-2Dproject.org_mailman_listinfo_interest&d=CwIGaQ&c=G4BpsyPyB19LB50bn2swXw&r=cAG2c-SQES5P2qb8IW-uwnBOCX_f2qYJIlzenFnoHUc&m=5X_i0s6I6cbSYRP1ZGUPRMZL0OkDR9nmhuR8RAiIems&s=uqkwZ-luxwKEVRGiNcxeHyJJsLYoSoDf-8BpMtqNlGI&e=
>
>
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org
> https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.qt-2Dproject.org_mailman_listinfo_interest&d=CwIGaQ&c=G4BpsyPyB19LB50bn2swXw&r=cAG2c-SQES5P2qb8IW-uwnBOCX_f2qYJIlzenFnoHUc&m=5X_i0s6I6cbSYRP1ZGUPRMZL0OkDR9nmhuR8RAiIems&s=uqkwZ-luxwKEVRGiNcxeHyJJsLYoSoDf-8BpMtqNlGI&e=
>
> 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. Please note that any views or opinions presented in this email
> are solely those of the author and do not necessarily represent those of the
> company. Finally, the recipient should check this email and any attachments
> for the presence of viruses. The company accepts no liability for any damage
> caused by any virus transmitted by this email.
> _______________________________________________ Interest mailing list
> Interest at qt-project.org
> http://lists.qt-project.org/mailman/listinfo/interest
>
>
> 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. Please note that any views or opinions presented in this email
> are solely those of the author and do not necessarily represent those of the
> company. Finally, the recipient should check this email and any attachments
> for the presence of viruses. The company accepts no liability for any damage
> caused by any virus transmitted by this email.
More information about the Interest
mailing list