How to set Windows taskbar title of a QMainWindow?

Question

Out of curiosity: I am currently developing a Qt application on Windows 7. I want to set the window title to display in the taskbar. setWindowTitle is not applicable as my UI is a QMainWindow, not a QWidget.

I have a QString with the title, but I can't set it. I set the QMainWindow title in the Qt Designer but that's static. All I had reached is this:

MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
  // ....
  QApplication::setApplicationDisplayName(qAppTitle);
  parent->setWindowTitle(qAppTitle);
  // ...
}

This turns the window title in my taskbar into:

[title from Qt Designer] - [qAppTitle variable]

Sucks.

Ideas?

What makes you think setWindowTitle isn't applicable? Or, more to the point, that a QMainWindow is not a QWidget? — Dan Milburn, Oct 16 '13 at 16:36
Because 1) QMainWindow is not a QWidget and 2) setWindowTitle has no visible effect. — r4ndom n00b, Oct 16 '13 at 16:52
It's possible with `setWindowTitle`, How do you use it?please update your code, put your code. — PersianGulf, Oct 16 '13 at 17:01
This works.. unless you mean its because W7 has icons by default? — paulm, Oct 16 '13 at 17:14
No it doesn't, it crashes immediately unless I comment the `parent->` line - and then the window title reads "[title from Qt Designer] - [qAppTitle variable]" :/ — r4ndom n00b, Oct 16 '13 at 17:17
Ah, gotcha! Remove the call to parent, just call the setWindowTitle that is a member of QMainWindow — paulm, Oct 16 '13 at 17:19
Great, now it reads "[qAppTitle] - [qAppTitle]"... we're getting closer! — r4ndom n00b, Oct 16 '13 at 17:23
Thats it - done. You only see the first part because its being executed from the designer :) — paulm, Oct 16 '13 at 17:25
No, I get the same result when directly executing the .exe file. — r4ndom n00b, Oct 16 '13 at 17:26
Fixed: I had to comment the `setApplicationDisplayName` line too. Thanks for your help! — r4ndom n00b, Oct 16 '13 at 17:28

score 2 · Accepted Answer · edited Sep 07 '19 at 19:16

2

QMainWindow has a setWindowTitle the same as QWidget (because it is one), see this question:

How to set QMainWindow title

Thus the solution is:

MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
  setWindowTitle("Hello world");
}

http://doc.qt.digia.com/4.7/qwidget.html#windowTitle-prop

Also

http://qt-project.org/doc/qt-5.0/qtwidgets/qmainwindow.html

"QMainWindow Class

The QMainWindow class provides a main application window. More...
#include <QMainWindow>
Inherits: QWidget."

edited Sep 07 '19 at 19:16

Glorfindel

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answered Oct 16 '13 at 17:22

paulm

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(After changes, see previous discussion:) Thanks! Solved. – r4ndom n00b Oct 16 '13 at 17:29
setApplicationDisplayName seems to be the only way on my system to change the window decoration's title. setWindowTitle had me running down a dead end for hours. – Evil Spork Dec 22 '17 at 08:24

How to set Windows taskbar title of a QMainWindow?

1 Answers1