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• 

  Solved How to Cross-compile Qt App for I.MX8MQEVK(fsl-image-qt5-validation-imx)
  • tkashi

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  @tkashi said in How to Cross-compile Qt App for I.MX8MQEVK(fsl-image-qt5-validation-imx):

  Hi community.

  I solved it self so I will share it.

  When using "fsl-image-qt5-validation-imx", you can build QtCreator cross-compilation environment using "meta-toolchain-qt5".

  Create a setup of SDK using following bitbake command. $ bitbake meta-toolchain-qt5 Install Qt5 SDK as follows. $ ./tmp/deploy/sdk/fsl-imx-xwayland-glibc-x86_64-meta-toolchain-qt5-aarch64-toolchain-4.14-sumo.sh Add gcc/g++/gdb/qmake Setting to QtCreator
  gcc/g++/gdb/qmake is located as follows. /opt/fsl-imx-xwayland/4.14-sumo/sysroots/x86_64-pokysdk-linux/usr/bin/aarch64-poky-linux/aarch64-poky-linux-gcc /opt/fsl-imx-xwayland/4.14-sumo/sysroots/x86_64-pokysdk-linux/usr/bin/aarch64-poky-linux/aarch64-poky-linux-g++ /opt/fsl-imx-xwayland/4.14-sumo/sysroots/x86_64-pokysdk-linux/usr/bin/aarch64-poky-linux/aarch64-poky-linux-gdb /opt/fsl-imx-xwayland/4.14-sumo/sysroots/x86_64-pokysdk-linux/usr/bin/qt5/qmake Add Sysroot to Kits
  Add Sysroot installed with SDK. /opt/fsl-imx-xwayland/4.14-sumo/sysroots/x86_64-pokysdk-linux

  In my environment, binaries for the target could be built with this.

  Best Regards,
  T.kashiwagi

• 

  Solved 5.11.1 iOS Bundle Identifier problems
  ios build qt 5.11.1 • • ekkescorner

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  @ekkescorner Oh, OK, thanks.

  I thought we could put this in the build settings:

  QMAKE_TARGET_BUNDLE_PREFIX = org.ekkescorner
  QMAKE_BUNDLE = c2g.qtws

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  Unsolved Compile error vivante on Qt 5.11
  • kmchaves

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  Unsolved Molten on iOS.
  • warmi

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  Hi and welcome to devnet,

  From the looks of it, not yet. However for a definitive answer you should rather bring this question to the interest mailing list. You'll find there Qt's developers/maintainers. This forum is more user oriented.

• 

  Unsolved How to include libusb libraries for android platform?
  • Ronak5

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  @Ronak5 Yes, you are lucky, libusb includes the required Android build files. So use those instructions for building, but ignore the section under "Installing". You were right in your original post, you just need to include the path in the pro file. Something like this:

  android { contains(ANDROID_ARCHITECTURE, "arm") { LIBS += -L/path/to/armlib/ -lusb } contains(ANDROID_ARCHITECTURE, "x86") { LIBS += -L/path/to/x86lib/ -lusb } }

  If a project doesn't include specific Android build files, you have to create a Standalone Toolchain as described here:

  https://developer.android.com/ndk/guides/standalone_toolchain

• 

  Unsolved Android QML RTSP Error
  • johniesm

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  @johniesm said in Android QML RTSP Error:

  rtsp://192.168.1.2:554/user=admin_password=secret_channel=1_stream=0.sdp?real_stream

  Are you sure the URL is right? Have you try it with some other player, i.e. VLC just to check?

• 

  Unsolved Unable to build to android. (Newbie)
  android android setting • • elopez7

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  @J.Hilk I could have sworn that the SDK manager installed the latest NDK.
  I updated manually and now it works. Thank you so much for your help!

• 

  Unsolved iPad don't fire QEvent::TouchUpdate
  • peter-70

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  @Gennyswiss
  Yes, the problem still exists. Maybe someone knows what could be the reason resp. solution for it

• 

  Unsolved Loading time of a page in Qt.
  • Vineela

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  @Vineela said in Loading time of a page in Qt.:

  it but didnt calculate properly

  This will not help @jsulm to help you. Please show/describe what is wrong

• 

  Unsolved Android: warning at time of compilation "has unsupported flags DT_FLAGS_1=0x80 (ignoring unsupported flags)". Why?
  • bogong

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  @koahnig It's only happening for Android. For iOS and MacOS - everything OK.

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  Unsolved Qt 5.10.1 EGLFS libinput Touchscreen rotation
  raspberry eglfs libinput touchscreen • • chtioub

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  Hi,

  Well, evdevtouch plugin seem to be completely buggy.
  The rotation woks very well but afin 1 to 10 secondes, the touch does not woks anymore.
  Even with example programs.

  I have this information :
  TouchPointPressed without previous release event QQuickEventPoint(accepted:false state:Pressed scenePos:QPointF(249.631,798.957) id:2000002 timeHeld:0)

  I have to reset the application to work.

  Is there any solution to workaround this bug or a solution with libinput ?

• 

  Unsolved QT raspberry cross compile debug environment
  • chtioub

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  @chtioub
  If you use ssh, you might get a different environment indeed. In that case, it matters in which profile you define your exports.

  Have a look at e.g.:
  https://stackoverflow.com/questions/216202/why-does-an-ssh-remote-command-get-fewer-environment-variables-then-when-run-man

  A neat suggestion therein is to define some custom variable in each of the potential profile files with the name of the variable in each file describing the profile's filename. Then look for which of those variables gets defined in your environment under various circumstances (directly at the Pi prompt, via SSH, etc...). Then put the the variables you need in the corresponding file.

• 

  Solved QBluetooth on iOS
  • kgregory

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  @ekkescorner Nice app, ekke. Thanks.

  I was troubled by the "XPC connection invalid" error in my app, but guess what: It happens in yours too. And since yours seems to work nicely, I'm moving on...

• 

  Unsolved How to prevent qt(linux) from drawing to black when first run?
  • devj

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  No one has replied

• 

  Unsolved How do i get the .tpk file
  • dom2308

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  Hi and welcome to devnet,

  Did you mean .apk ?
  If so, that's what you get at the end of the build operation so you can find it in the build folder.

  Same goes for iOS.

• 

  Unsolved How to install Qt 5.12 on TX1 board?
  • Gannu Bangalore

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  @Gannu-Bangalore

  Looks like you need to cross-compile for this embedded board https://doc.qt.io/qt-5/embedded-linux.html

  Probable you need to find a suitable cross-compiler first.
  Otherwise you would need to check if you can get the complete environment for compilation of Qt onto that board.

• 

  Unsolved Optimizing CPU/RAM usage when playing video with Qt on Raspberry
  video raspberry optimization gstreamer • • etiennedm

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• 

  Solved Qt Creator can't connect to iPad
  • peter-70

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  @J.Hilk

  Yeah, you're surely right. It run's now, but to be honest, I don't know why :-(

  I've started iTunes, and it instructed me to setup the iPad. After this, I created a mini app, and opened it in Xcode. Up and down... the run-buttons on Qt-Creator are green now.

  Nevertheless I get an error:
  :-1: error: Deployment failed. The settings in the Devices window of Xcode might be incorrect.

  So I must see, what it is

  Thank you very much for your advice!

• 

  Unsolved QT For android
  • QTDU

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  Unsolved Libsodium (libsodium.org) for Qt iOS project. How?
  • bogong

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  Hi,

  You should rather contact the authors of that library to get accurate instructions on how to build it for iOS.

  Once you have it, it's going to be same as with any other external libraries.

• 

  Solved NoSuchMethodError with JNI during reading Shared Preferences in Android
  • PowerNow

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  Now it works, the reason was the semicolon at the end which I overlooked.

  "(Ljava/lang/String;I)I;" -> "(Ljava/lang/String;I)I"

• 

  Unsolved How to read files from usb flash drive using libusb libarary api's?
  • Ronak5

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  @J.Hilk Hi, I was going through lib usb for android here https://libusb.info/
  It says that "It is portable: Using a single cross-platform API, it provides access to USB devices on Linux, OS X, Windows, Android, OpenBSD, etc."

  So , does it mean the linux implementation would work for android platform also?
  I don't know how to include libusb libraries for android platform.
  It

• 

  Solved Qml with c++ backend freezes on android
  • PouryaTorabi

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  After a lot of struggling I had to download and install qt 5.12.1 which also installed Qt creator 4.8.1, I also had to change the ndk version, it didn't work with the ndk r14 so I used ndk r19, then built the project again and the bug was solved.
  There were no update for qt5.12.1 in the maintenance tool.
  Thanks for your help @J-Hilk .

• 

  Solved Rotating touch screen in QT Application using Evdevtouch plugin causes crashes
  • Angel Popov

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  I think I fixed the things up.

  I set the variables like:
  export QT_DEBUG_PLUGINS="1"
  export QT_QPA_EGLFS_DISABLE_INPUT="1"
  export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS="/dev/input/event1:rotate=270"
  export QT_QPA_GENERIC_PLUGINS="evdevtouch:/dev/input/event1"

  I found that they ware not set in the Application.sh that i'm using to start the application at boot time, so i just modified main.cpp:

  **#include <QGuiApplication>
  #include <QApplication>
  #include <QtQuick>
  #include "core.h"

  int main(int argc, char *argv[])
  {
  qmlRegisterType<core>("core", 1, 0, "Gen");
  qputenv("QT_IM_MODULE", QByteArray("qtvirtualkeyboard"));
  qputenv("QT_QPA_EGLFS_PHYSICAL_WIDTH", QByteArray("1920"));
  qputenv("QT_QPA_EGLFS_PHYSICAL_HEIGHT", QByteArray("1080"));
  qputenv("QT_QPA_EGLFS_FORCE888", QByteArray("1"));
  qputenv("QT_QPA_EGLFS_DEPTH", QByteArray("32"));

  qputenv("QT_DEBUG_PLUGINS", QByteArray("1")); qputenv("QT_QPA_EGLFS_DISABLE_INPUT", QByteArray("1")); qputenv("QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS", QByteArray("/dev/input/event1:rotate=270")); qputenv("QT_QPA_GENERIC_PLUGINS", QByteArray("evdevtouch:/dev/input/event1")); qputenv("QT_QPA_EGLFS_HIDECURSOR", QByteArray("1")); QApplication app(argc,argv); QQuickView view;

  // QApplication::setOverrideCursor(Qt::BlankCursor);
  view.setResizeMode(QQuickView::SizeRootObjectToView);
  view.setSource(QUrl(QStringLiteral("qrc:/main.qml")));

  return app.exec();

  }**

  Now the application is starting without -plugin Evdevtouch:/dev/input/event0:rotate=90:invertx=0:inverty=1 argument.

  I think that there ware some thread problems.

• 

  Unsolved How to create an automatic player
  • tomy

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  @J.Hilk
  Hi. Thanks.

  I think AI is but a logic carried out by some short or long code written by a developer. And, the whole thing the code used to distinguish between itself and a non-AI code, is making use of the random() function. That is, that function is the centre of AI code as a tool. There might be other tools as well.
  Why I think so?
  Because it's part of the nature of humans to make mistakes and at times be very superb. That is, a spectrum of success and failure. That is consequently performed by how we use the ramification of that method. If we push up the likelihood of winning, we simply raise the opportunity by the numbers we use to feed the function. On the other hand, it's feasible, as you know, to broaden the rage of hit once again by those numbers to reduce the occurrence of winning.

  Agree up to here?
  And if so, is there any other tool, apart from random(), to be perfectly used in AI?

• 

  Solved Qt Purchasing supports Subscriptions on Android?
  • Vitaliy

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  No need for a complete Qt build. Just the module you are interested in.

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  Solved Don't see library in iOS device but on iOS emulator all is OK. Why?
  • bogong

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  Solution found. It's a little hard coded solution but it works for me and my own purpose.
  How-to published in Github

• 

  Unsolved Check if QWidget is currently in visible display area
  • peter-70

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  @SGaist

  When I'm loading the items into my list, I have first the following behavior:
  

  The items are inside the displaying area at the loading items time, are correct drawn. But the items are not in the displaying area at the loading items time, are not drawn, as you can see. They are white, with thin gray top-border only.

  When I "open" one of the items in a new QMainWindow, and then I close it again, so I see the list again, ALL the items are drawn correct.

  I have a paint method for each item

  void PositionGroupbox::paintEvent(QPaintEvent*) { QStyleOption opt; opt.init(this); QPainter p(this); style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this); }

  Maybe this ist the reason, for the defective draw-behavior. Therefor I want to watch, when the Item comes into the visible display-area, I could tray to draw it again.

  It is a little complicated, sorry for that

• 

  Unsolved Multiple screens on Qt Automotive with iMX6
  • Isaias

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  Hello @tomasz3dk

  I can run the Qt Neptune demo or other Qt app in one screen or the other, even both at the same time, setting QT_QPA_EGLFS_FB to the correct fb before executing the app

  But my final intention is to modify the Neptune configuration to work something like this Neptune 3 UI - Configuring Screens on Embedded Linux

  It looks like I am missing to set up a configuration for the Qt Embedded Stack to detect both screens but I don't know.

• 

  Solved Error on QtConcurrent::run
  • peter-70

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  @peter-70 said in Error on QtConcurrent::run:

  Yes, PositionGroupbox derive from QWidget directly. But What does it matter?

  It matters quite a lot. QWidget is not thread-safe and it's not reentrant. You can't touch anything QWidget-y outside the GUI thread, including creating the actual object. Failing to observe this is a race condition and ultimately a bug. That is to say, you have bigger problems than a syntax error.

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  Unsolved Check Consumable-InAppPurchase on Android after app reinstall?
  • PowerNow

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  Unsolved How to modify the QtPurchasing.jar file?
  • PowerNow

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  @PowerNow well, if you're Ok to wait... Ticket was created 24 Nov '15 8:04 AM

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  Unsolved How to make touch screen work on cross-compiled EGLFS application (on RPi3)?
  • rrd0

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  @rrd0 this post and this SO answer may shade some light for your issue...

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  Unsolved Qt 5.11.2 qt on android Could not resolve com.android.tools.build:gradle:2.2.3. help! help! help!
  • ficus

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  I have the same problem.

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  Unsolved iOS QThread slows down UI
  • Vi67

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  Hi,

  QNetworkAccessManager is already asynchronous so why the additional classes ?

  That code is a pretty convoluted design to move your networking stuff in another thread.

• 

  Unsolved multimediawidgets/camera example not working on Android.
  • Domel07

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  Hi,

  There are several camera related examples that comes with Qt.

• 

  Solved Add Objectice C Class to Qt project and call it from Qt C++ Class. How?
  • bogong

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  The technique is: don't put anything Objective-C in the header you will you use in your C++ code. You can take a look at the QtMacExtras module to see the technique in action. Also the Cocoa backend in Qt's sources.

• 

  Unsolved Image processing
  • AxZaHeCa

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  @AxZaHeCa
  well docs
  says
  typedef QRgb
  An ARGB quadruplet on the format #AARRGGBB, equivalent to an unsigned int.

• 

  This topic is deleted!
  • prateekj778

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  Unsolved How to record video using QGraphicsView with Overlay text?
  • nikita.panchal09

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