AccessibleName for QPushButton stopped working in the 6.9.2 with the QTabWidget

[Olex]

AccessibleName for QPushButton stopped working in the 6.9.2 with the QTabWidget (for first page).
It works perfect for 6.9.1 and earlier.
Style from style.qss (for example, background color) doesn't apply for Button 1 in the first page of the QTabWidget, but it works for Button 2 on the second page.

Program code (simplest program):

main.cpp:

#include "mainwindow.h"

#include <QApplication>
#include <QFile>

int main(int argc, char *argv[])
{
QApplication app(argc, argv);

QFile styleFile(":/res/stylesheet.qss");

#ifdef QT_DEBUG
bool ret =
#endif // QT_DEBUG
styleFile.open(QFile::ReadOnly);
#ifdef QT_DEBUG
qDebug() << "\nMain function (app starts): styleFile.open = " << ret << "\n";
#endif // QT_DEBUG
QString styleSheet = QLatin1String(styleFile.readAll());
app.setStyleSheet(styleSheet);

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

}

mainwindow.h:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

QT_BEGIN_NAMESPACE
namespace Ui {
class MainWindow;
}
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
MainWindow(QWidget *parent = nullptr);
~MainWindow();

private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H

mainwindow.cpp:

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
}

MainWindow::~MainWindow()
{
delete ui;
}

stylesheet.qss:

QPushButton[accessibleName="btn_1"]
{
background-color: #9afc9d;
color: #000000;
border: 1px solid #728773;
border-radius: 6px;
}

QPushButton[accessibleName="btn_2"]
{
background-color: #0afc9d;
color: #000000;
border: 1px solid #728773;
border-radius: 6px;
}

mainwindow.ui:

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>800</width>
<height>600</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<widget class="QWidget" name="centralwidget">
<widget class="QTabWidget" name="tabWidget">
<property name="geometry">
<rect>
<x>20</x>
<y>140</y>
<width>751</width>
<height>131</height>
</rect>
</property>
<property name="currentIndex">
<number>1</number>
</property>
<widget class="QWidget" name="tab">
<attribute name="title">
<string>Tab 1</string>
</attribute>
<widget class="QPushButton" name="btn1">
<property name="geometry">
<rect>
<x>60</x>
<y>40</y>
<width>80</width>
<height>25</height>
</rect>
</property>
<property name="accessibleName">
<string>btn_1</string>
</property>
<property name="text">
<string>Button 1</string>
</property>
</widget>
</widget>
<widget class="QWidget" name="tab_2">
<attribute name="title">
<string>Tab 2</string>
</attribute>
<widget class="QPushButton" name="btn2">
<property name="geometry">
<rect>
<x>130</x>
<y>40</y>
<width>80</width>
<height>25</height>
</rect>
</property>
<property name="accessibleName">
<string>btn_2</string>
</property>
<property name="text">
<string>Button 2</string>
</property>
</widget>
</widget>
</widget>
</widget>
<widget class="QMenuBar" name="menubar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>800</width>
<height>22</height>
</rect>
</property>
</widget>
<widget class="QStatusBar" name="statusbar"/>
</widget>
<resources/>
<connections/>
</ui>

[SGaist]

Hi,

Which OS are you on ?
What are you using for assistive backend ?

[Olex]

Hi.
Windows.
Sorry, didn't understand "assistive backend". Qt creator? Qt Creator 17.0.1

[SGaist]

What software are you using for accessibility ?
macOS as built-in support
There's NVDA for Windows
Orca for Linux
Those are just some example from memory, things may have changed since they were common.

[Olex]

Narrator in Windows 11. Tested the same code on other computer - 6.9.1 woks, 6.9.2 - doesn't :(

[Olex]

I have pretty simple code that worked many years on Windows 10 and Windows 11 in Qt 5 and Qt 6 - except Qt 6.9.2 :(

[Olex]

I suspect there's not any relations to "software for accessibility". It's about QWidget parameter "accessiblename" and style.qss file from program's resource cooperation.

[Christian Ehrlicher]

Please provide a minimal, compilable example (from what I see it should fit into 20 lines in a single main.cpp) so we can take a look on what you are trying to do and what's no longer working. Looks like you mis-use accessibleName property to modify the style of your widgets but I'm not sure.

[Olex]

*# .pro:

QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++17

You can make your code fail to compile if it uses deprecated APIs.

In order to do so, uncomment the following line.

#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0

SOURCES +=
main.cpp
mainwindow.cpp

HEADERS +=
mainwindow.h

FORMS +=
mainwindow.ui

Default rules for deployment.

qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

RESOURCES +=
resource.qrc

[Olex]

# main.cpp:

#include "mainwindow.h"

#include <QApplication>
#include <QFile>

int main(int argc, char *argv[])
{
QApplication app(argc, argv);

QFile styleFile(":/res/stylesheet.qss");
bool ret = styleFile.open(QFile::ReadOnly);
qDebug() << "\nMain function (app starts): styleFile.open = " << ret << "\n";
QString styleSheet = QLatin1String(styleFile.readAll());
app.setStyleSheet(styleSheet);

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

}

====================================================

# mainwindow.h:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

QT_BEGIN_NAMESPACE
namespace Ui {
class MainWindow;
}
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
MainWindow(QWidget *parent = nullptr);
~MainWindow();

private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H

====================================================

# mainwindow.cpp:

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
}

MainWindow::~MainWindow()
{
delete ui;
}

====================================================

# mainwindow.ui:

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>800</width>
<height>600</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<widget class="QWidget" name="centralwidget">
<widget class="QTabWidget" name="tabWidget">
<property name="geometry">
<rect>
<x>20</x>
<y>140</y>
<width>751</width>
<height>131</height>
</rect>
</property>
<property name="currentIndex">
<number>1</number>
</property>
<widget class="QWidget" name="tab">
<attribute name="title">
<string>Tab 1</string>
</attribute>
<widget class="QPushButton" name="btn1">
<property name="geometry">
<rect>
<x>60</x>
<y>40</y>
<width>80</width>
<height>25</height>
</rect>
</property>
<property name="accessibleName">
<string>btn_1</string>
</property>
<property name="text">
<string>Button 1</string>
</property>
</widget>
</widget>
<widget class="QWidget" name="tab_2">
<attribute name="title">
<string>Tab 2</string>
</attribute>
<widget class="QPushButton" name="btn2">
<property name="geometry">
<rect>
<x>130</x>
<y>40</y>
<width>80</width>
<height>25</height>
</rect>
</property>
<property name="accessibleName">
<string>btn_2</string>
</property>
<property name="text">
<string>Button 2</string>
</property>
</widget>
</widget>
</widget>
</widget>
<widget class="QMenuBar" name="menubar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>800</width>
<height>22</height>
</rect>
</property>
</widget>
<widget class="QStatusBar" name="statusbar"/>
</widget>
<resources/>
<connections/>
</ui>

====================================================

# stylesheet.qss:

QPushButton[accessibleName="btn_1"]
{
background-color: #9afc9d;
color: #000000;
border: 1px solid #728773;
border-radius: 6px;
}

QPushButton[accessibleName="btn_2"]
{
background-color: #0afc9d;
color: #000000;
border: 1px solid #728773;
border-radius: 6px;
}

[Christian Ehrlicher]

These are more than 20 lines and even ore than one file.
Reduce your testcase if you want me to look at it.

[Olex]

Sorry, it's not a console application. It has ui file and class MainWindow. I don't see possibility to make them in one file less than 20 lines. And I'm interested exactly in using style.qss file.

[Christian Ehrlicher]

Oh sorry, not 20 lines but 23:

#include <QtWidgets>

int main(int argc, char** argv)
{
    QApplication app(argc, argv);
    app.setStyleSheet(R"(
QPushButton[accessibleName="btn_1"]
{ background-color: #9afc9d; }
QPushButton[accessibleName="btn_2"]
{ background-color: #0afc9d; }
)");
    QWidget w;
    QVBoxLayout* lay = new QVBoxLayout(&w);
    auto pb1 = new QPushButton("Push me once");
    pb1->setAccessibleName("btn_1");
    auto pb2 = new QPushButton("Push me twice");
    pb2->setAccessibleName("btn_2");
    lay->addWidget(pb1);
    lay->addWidget(pb2);
    w.show();
    return app.exec();
}

This is working fine for me with current Qt from git with windows/windowsvista/windows11 and fusion style:

/edit: Installed 6.9.2 with the online installer and also works as expected.

[Olex]

Yes, it works in this case. There is not a tabwidget with at list two pages. I added it and it works. Thanks. But it doesn't work with the ui (xml file) and qt widgets application.

[Christian Ehrlicher]

This is also working fine:

int main(int argc, char** argv)
{
    QApplication app(argc, argv);
    app.setStyleSheet(R"(
QPushButton[accessibleName="btn_1"]
{ background-color: #9afc9d; }
QPushButton[accessibleName="btn_2"]
{ background-color: #0afc9d; }
)");
    QMainWindow mw;
    auto tw = new QTabWidget;
    mw.setCentralWidget(tw);
    auto w = new QWidget;
    tw->addTab(w, "Tab");
    QVBoxLayout* lay = new QVBoxLayout(w);
    auto pb1 = new QPushButton("Push me once");
    pb1->setAccessibleName("btn_1");
    auto pb2 = new QPushButton("Push me twice");
    pb2->setAccessibleName("btn_2");
    lay->addWidget(pb1);
    lay->addWidget(pb2);
    mw.show();
    return app.exec();
}

Please provide a minimal, compilable example to reproduce the problem.

[Olex]

I added it before and it works. But this code doesn't reproduce the problem :(

#include <QApplication>
#include <QMainWindow>
#include <QtWidgets>

int main(int argc, char** argv)
{
QApplication app(argc, argv);

app.setStyleSheet(R"(

QPushButton[accessibleName="btn_1"]
{ background-color: #9afc9d; }
QPushButton[accessibleName="btn_2"]
{ background-color: #0afc9d; }
)");

QMainWindow win;
QWidget cw(&win);
win.setCentralWidget(&cw);

QTabWidget tw(&cw);
QWidget w1;
tw.addTab(&w1, "1");
QVBoxLayout* lay1 = new QVBoxLayout(&w1);
auto pb1 = new QPushButton("Push me once", &w1);
pb1->setAccessibleName("btn_1");
lay1->addWidget(pb1);

QWidget w2;
tw.addTab(&w2, "2");
QVBoxLayout* lay2 = new QVBoxLayout(&w2);
auto pb2 = new QPushButton("Push me twice", &w2);
pb2->setAccessibleName("btn_2");
lay2->addWidget(pb2);

win.show();

return app.exec();

}

Thanks. Sorry, I provide example earlier. It reproduces the problem.

[SimonSchroeder]

Maybe have a look at the generated ui_mainwindow.h file. You need to figure out what is different between the example without the ui-file and with the ui-file. The ui-file just gets translated to regular C++ code.

[Olex]

Thanks. There is no any unusual :(. It worked for years. UI file created by qt designer:

<widget class="QPushButton" name="btn1">
<property name="geometry">
<rect>
<x>60</x>
<y>40</y>
<width>80</width>
<height>25</height>
</rect>
</property>
<property name="accessibleName">
<string>btn_1</string>
</property>
<property name="text">
<string>Button 1</string>
</property>
</widget>

Just "accessibleName". And it works for second page of the TabWidget.

[Christian Ehrlicher]

I still don't understand what's the problem minimizing your code until the problem goes away... The ui file is also only c++ code so move it to your cpp and reduce it. Daily business of a programmer.

[Olex]

The problem isn't in minimizing my code :(. The question is about this issue. Why did this happen? What is the cause? It's not about my code. I'll figure out what to do to fix it. I want to figure out why it happened. It mustn't be such issue, but it exists in 6.9.2 exactly. And when and where will the problem with the "accessibleName" happen next time? Always move parameter "accessibleName" to c++ code? Will it work if ui file has more complex GUI?