Touch coordinates offset in QMessageBox when Qt::FramelessWindowHint is set

[Ramkumar Mohan]

I found that my QMessageBox was not responding to touch events whenever the Qt::FramelessWindowHint window flag is set. When cleared, the dialog responds normally.

This is my code,

QMessageBox msg(this);
msg.setWindowFlags(Qt::Dialog | Qt::FramelessWindowHint);
msg.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
msg.setButtonText(QMessageBox::Ok , "Run");
msg.setButtonText(QMessageBox::Cancel , "Back");
if(msg.exec() == QMessageBox::Ok)
{
qDebug()<<"OK";
}

how to fix the bug ?
Thank you.

[SGaist]

Hi,

There are missing information:

• Qt version ?
• OS ?
• if Linux, which distribution ?
• touch screen ?
• Device ?
• self-built Qt ?
  etc.

[Ramkumar Mohan]

@SGaist

QT Version :

Qt Creator 4.8.2
Based on Qt 5.11.3 (GCC 8.3.0, 32 bit)

OS :

Raspberry pi os (Legacy) ---- Linux
Yes, touch screen

One more doubt

for Alternative code,

How to disable minimize, maximize and close options in message box without using framelesswindow hint?

[SGaist]

That's the Qt Creator version. It has nothing to do with the version of Qt you are using to build your application.

Check the Qt::WindowCloseButtonHint and friend flags that you can set on your widget.

[Ramkumar Mohan]

@SGaist

Hi,

How to disable the Minimize option in the message box shown in the photo.

[jsulm]

@Ramkumar-Mohan By unsetting Qt::WindowMinimizeButtonHint flag on your dialog (https://doc.qt.io/qt-6/qmessagebox.html#QMessageBox-1)

[Ramkumar Mohan]

@jsulm

msg.setWindowFlags(Qt::Dialog | Qt::WindowMinimizeButtonHint);

I'm Setting this code , but not worked for me . i don't know
how to set the code .
Thank you.

[jsulm]

@Ramkumar-Mohan Please show the whole code where you're showing the message box. Also, on which OS are you?

[JonB]

@jsulm said in Touch coordinates offset in QMessageBox when Qt::FramelessWindowHint is set:

@Ramkumar-Mohan By unsetting Qt::WindowMinimizeButtonHint flag

@Ramkumar-Mohan said in Touch coordinates offset in QMessageBox when Qt::FramelessWindowHint is set:

msg.setWindowFlags(Qt::Dialog | Qt::WindowMinimizeButtonHint);

As @jsulm said, if you want not to have a "minimize button" you need to unset/clear the Qt::WindowMinimizeButtonHint flag, not set it.

[Ramkumar Mohan]

@jsulm

This my code ,

QMessageBox msg(this);
msg.setWindowFlags(msgBox.windowFlags()&(~ Qt::WindowMinimizeButtonHint));
msg.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
msg.setButtonText(QMessageBox::Ok , "Run");
msg.setButtonText(QMessageBox::Cancel , "Back");
if(msg.exec() == QMessageBox::Ok)
{
qDebug()<<"OK";
}

I wrote the code for remove Minimize Button , but the code is not working properly,
I run the code but it showing the minimize button , and i click the minimize button .( Closed the whole Running page) where the error , i don't think to how to solve it ,
Please give any resolving suggestion to me ,

Thank you.

[JonB]

@Ramkumar-Mohan said in Touch coordinates offset in QMessageBox when Qt::FramelessWindowHint is set:

msg.setWindowFlags(msgBox.windowFlags()&(~ Qt::WindowMinimizeButtonHint));

That is better! And the best that you can do. WindowMinimizeButtonHint is a hint, I believe that not all windowing systems respect it. If you download the Window Flags Example and play with it you can find out which flags work how on your platform.

[Ramkumar Mohan]

@JonB

That problem has been solved. Now that's working fine. Thank you.