qt6 qt creator acceptTouchEvents on x11 ubuntu

gfxx

I return on these because discover maybe not set properly touch event.

After these note: my ubuntu 24 work great with touch screen installed ... very reactive ..... perfect. But when work inside a project of qt creator 14 (every project ... example project too) inside project windows or inside qtcreator windows, touch screen is not so reactive. When use touch outside qt creator or qt app, touch screen work again perfectly, but if return inside windows of qt app touch is unresponsive ......

Any how in my mainwindows I insert these attribute:

QtCoreApplication::setAttribute(Qt::WA_AcceptTouchEvents);

QtApplication::setAttribute(Qt::WA_AcceptTouchEvents);
QApplication app(argc, argv);

...........
MainWindow mainWin;
mainWin.show();
return app.exec();

I done something wrong? because my app somethings is unresponsive on touch, better: if press in some point ... over button for example .... button is not press .... not the first not the second maybe at third time try to press it ....... with mouse not problem at all ....

prreciate any help .... previously (maybe bad explain my cases) not have it on these arguments.

regards

afalsa

Try add Qt::Window attribute in addition to AcceptTouchEvents

gfxx

same result ....

gfxx

@afalsa ..... aftyer your suggestion I note my qicon on app not show in right manner (..... yes I loose some time to search for stupid things for relax me ....). My previous code:

    QString hpB1 = QDir::currentPath();
    QString hP1 = QDir::homePath();

    // Set the homePath in the Globals singleton
    Globals::instance().setHP(hP1);
    Globals::instance().setHPB(hpB1);


    MainWindow w;
    w.setWindowTitle(QApplication::translate("w", "bla bla bla"));
    w.setAttribute(Qt::WA_AcceptTouchEvents, Qt::Window);
    w.setAttribute(Qt::WA_DeleteOnClose);
    w.setWindowIcon(QIcon(hpB1 + "/resources/ls_black.png")); /* note these row */
    w.setWindowIconText("GreenMonitor");
    w.resize(1260,800);
    //w.move(( scr.center() - rect().center() ));
    w.show();

and after me relax time I try for joke these different one ....

    QString hpB1 = QDir::currentPath();
    QString hP1 = QDir::homePath();
    QString joker = hpB1 + "/resources/ls_black.png";

    // Set the homePath in the Globals singleton
    Globals::instance().setHP(hP1);
    Globals::instance().setHPB(hpB1);


    MainWindow w;
    w.setWindowTitle(QApplication::translate("w", "bla bla bla"));
    w.setAttribute(Qt::WA_AcceptTouchEvents, Qt::Window);
    w.setAttribute(Qt::WA_DeleteOnClose);
    w.setWindowIcon(QIcon(joker)); /* note these row */
    w.setWindowIconText("GreenMonitor");
    w.resize(1260,800);
    //w.move(( scr.center() - rect().center() ));
    w.show();

now magically my touch work as expect ..... really stupid but real ..... someone can explain why these?

regards

gfxx

So actually for run my touch on main I add these row:

#include "mainwindow.h"
#include <QApplication>
#include <QDialog>
#include <QScreen>
#include <QIcon>
#include <QGuiApplication>
#include "login.h"
#include "globals.h"
#include <QTouchEvent>


int main(int argc, char *argv[])
{
    QCoreApplication::setAttribute(Qt::AA_SynthesizeMouseForUnhandledTouchEvents, true);
        QCoreApplication::setAttribute(Qt::AA_SynthesizeMouseForUnhandledTouchEvents, true);


    QApplication a(argc, argv);
    QApplication::setOrganizationName( "created by bkt" );
    QApplication::setOrganizationDomain( "github_bkt" );
    QApplication::setApplicationName( "bkt_data" );


    //QScreen *screen = QGuiApplication::primaryScreen();
    //QRect scr = screen->geometry();
   QString hpB1 = QDir::currentPath();
    QString hP1 = QDir::homePath();
    QString joker = hpB1 + "/resources/ls_black.png";

    // Set the homePath in the Globals singleton
    Globals::instance().setHP(hP1);
    Globals::instance().setHPB(hpB1);


    MainWindow w;
    w.setWindowTitle(QApplication::translate("w", "bla bla bla"));
    w.setAttribute(Qt::WA_AcceptTouchEvents, Qt::Window);
    w.setAttribute(Qt::WA_DeleteOnClose);
    w.setWindowIcon(QIcon(joker)); /* note these row */
    w.setWindowIconText("GreenMonitor");
    w.resize(1260,800);
    //w.move(( scr.center() - rect().center() ));
    w.show();

    return a.exec();
}

and after inizilize UI on mainwindows i write:

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    this->setAttribute(Qt::WA_AcceptTouchEvents, Qt::Window);
    this->setAttribute(Qt::WA_WState_AcceptedTouchBeginEvent);

I write all these 2 week ago ... but never check about path of qicon ... not think these is a problem ..... but for sure actually icon on icon app not is show .... instead touchscreen work perfectly ....

gfxx

Sorry but happy for these result, I forgott to try my app with firefox open for example ..... and now with firefox open touch become unresposive again only over qt6 app .... on other SO app is perfect. I'm desperate !!!!!

afalsa

I think my knoledge in this topic is limited.

The only thing i can tell you is to try to show qt logs and try to find the problem...

https://doc.qt.io/qt-6/embedded-linux.html#logging
https://rsadowski.de/posts/2023-01-05-qt-kde-controlling-debug-messages/`

Good luck

gfxx

https://rsadowski.de/posts/2023-01-05-qt-kde-controlling-debug-messages/

gfxx

I add these: if I try to play with cinammon desktop features for mouse event (less or more delay on clicck etc etc .... leave out touchpad control) touchscreen on qt6 give a little better result .... now seems click is bring when finger press exactly over text in a button .... but non when press on button ..... if try to make a 250px x 250px button with a button text at 24px .... if press on text all work as normal .... but if press on empty area of button no touch event ...... so these seeems related to a some sort of "z" level in xml file of button (or a similar situation on button file ( i suppose these, because not know if qt use xml for draw and render widget) not at secondary screen of touch or similar issue ....

gfxx

can these code solve problem?

cmake_minimum_required(VERSION 3.16)
project(MyTouchApp)

# Find required Qt modules
find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)

# Add the executable
add_executable(MyTouchApp main.cpp MyWidget.cpp)

# Link Qt libraries
target_link_libraries(MyTouchApp PRIVATE Qt6::Core Qt6::Gui Qt6::Widgets)

# Optional: Add libinput
find_package(PkgConfig REQUIRED)
pkg_check_modules(LIBINPUT libinput)

if(LIBINPUT_FOUND)
    target_include_directories(MyTouchApp PRIVATE ${LIBINPUT_INCLUDE_DIRS})
    target_link_libraries(MyTouchApp PRIVATE ${LIBINPUT_LIBRARIES})
endif()

# Optional: Add evdev
pkg_check_modules(LIBEVDEV libevdev)

if(LIBEVDEV_FOUND)
    target_include_directories(MyTouchApp PRIVATE ${LIBEVDEV_INCLUDE_DIRS})
    target_link_libraries(MyTouchApp PRIVATE ${LIBEVDEV_LIBRARIES})
endif()

gfxx

the previous is only a part of solutions .... first need to connect qt6 to the right touch device .... on xinput list I find manu devices all generated from my touch ......