When setting font bold in Qt 6.7, why doesn't the font appear in black?

lctong888

Qt6.7 MinGw 64-bit

// Set the font to bold
QFont font1("SimSun",11,QFont::Bold);
ui->Btt1->setFont(font1);

// Set the font color to black
QPalette palette = ui->Btt1->palette();
palette.setColor(QPalette::ButtonText, Qt::black);
ui->Btt1->setPalette(palette);

Christian Ehrlicher

I don't see a difference in your pictures. Please provide a minimal, compilable example to reproduce your problem.
What style do you use? If it's windows11 style then update to 6.10 as it massively evolved since the introduction in 6.7

lctong888

Windows 11
Qt6.10 MinGw 64-bit
also problematic

Code example：
1、Test0116.pro
QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++17

SOURCES +=
main.cpp
mainwindow.cpp

HEADERS +=
mainwindow.h

FORMS +=
mainwindow.ui

2、main.cpp
#include "mainwindow.h"

#include <QApplication>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}

3、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>281</width>
<height>149</height>
</rect>
</property>
<property name="font">
<font>
<family>SimSun</family>
<pointsize>11</pointsize>
<bold>true</bold>
</font>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<widget class="QWidget" name="centralwidget">
<widget class="QPushButton" name="Btt1">
<property name="geometry">
<rect>
<x>60</x>
<y>50</y>
<width>131</width>
<height>31</height>
</rect>
</property>
<property name="font">
<font>
<family>SimSun</family>
<pointsize>11</pointsize>
<bold>true</bold>
</font>
</property>
<property name="styleSheet">
<string notr="true">font-weight: bold;
color: black;</string>
</property>
<property name="text">
<string>123456789</string>
</property>
</widget>
</widget>
</widget>
<resources/>
<connections/>
</ui>

4、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

5、mainwindow.cpp
#include <QPalette>
#include "mainwindow.h"
#include "ui_mainwindow.h"

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

// Set the font to bold
QFont font1("SimSun",11,QFont::Bold);
ui->Btt1->setFont(font1);

// Set the font color to black
QPalette palette = ui->Btt1->palette();
palette.setColor(QPalette::ButtonText, Qt::black);
ui->Btt1->setPalette(palette);

}

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

lctong888

Windows 11
Qt6.7、Qt6.10 MinGw 64-bit
also problematic

Create a QT project,
Add a button, settings Font: SimSun, bold, size 11.
As shown in the figure:

Christian Ehrlicher

Your picture still shows a black text.
Please use a recent Qt version and provide a minimal, compilable example including style you use and the color value you expect and you got (however you read it out, maybe a screenshot and read out the value with an image editor like e.g. gimp)