QLabel not update, when the parent widget is Qt::FramelessWindowHint

[Gaobo]

Hi, I create a QDialog, and put a QLabel into the dialog, set the QLabel word wrap, when i revoke the function this->setWindowFlag(Qt::FramelessWindowHint); , and reset the text of QLabel by call setText, it not update the text .
but if i don't set the FramelessWindowHint flag, the QLabel update normally;
My Qt's Version is 5.15.2, system version is Windows10.

    QString strWinDesktopPath = QStandardPaths::writableLocation(QStandardPaths::DesktopLocation);

    auto selectDir = QFileDialog::getExistingDirectory(this, tr("Select Dirctory"), ui->savePathLabel->text(), QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);

    if (selectDir.isEmpty())
    {
        return;
    }

    ui->savePathLabel->setText(selectDir);

if i call qApp->processEvent() , the text is update, and qlabel wrap the text, but the height is not suitable.

[Axel Spoerl]

Hi,
Qt 5.15.2 is long outdated, please try Qt 6.5 or newer.

[Gaobo]

Oh, I don't want to update the version of my project, is that question a bug of Qt5.15.2?

[Christian Ehrlicher]

@Gaobo said in QLabel not update, when the parent widget is Qt::FramelessWindowHint:

s that question a bug of Qt5.15.2?

Since you did not provide a minimal, compilable example of your problem I would say no - it's a problem of your code.

[Gaobo]

@Christian-Ehrlicher said in QLabel not update, when the parent widget is Qt::FramelessWindowHint:

@Gaobo said in QLabel not update, when the parent widget is Qt::FramelessWindowHint:

s that question a bug of Qt5.15.2?

Since you did not provide a minimal, compilable example of your problem I would say no - it's a problem of your code.

so, how do i solve this problem? if not set FramelessWindowHint, everything is ok. Can you give me some reasons why this might be happening or some directions I can troubleshoot this issue? thanks

[Christian Ehrlicher]

@Gaobo said in QLabel not update, when the parent widget is Qt::FramelessWindowHint:

so, how do i solve this problem?

How should we know when you don't show us what exactly you are doing?
Create a minimal reproduce of your problem. From your description I would guess it's not more than 30 lines.

[Gaobo]

@Christian-Ehrlicher said in QLabel not update, when the parent widget is Qt::FramelessWindowHint:

@Gaobo said in QLabel not update, when the parent widget is Qt::FramelessWindowHint:

so, how do i solve this problem?

How should we know when you don't show us what exactly you are doing?
Create a minimal reproduce of your problem. From your description I would guess it's not more than 30 lines.

ok, i try to reproduce this problem, thanks