QGuiApplication window icon

[LeLev]

I'm trying to change my application icon, i did :

QGuiApplication::setWindowIcon(QIcon(":/GUI/img/Radiation.png"));

but icon is not changing.
I also tryed the solution posted by @J-Hilk
https://forum.qt.io/topic/92233/qml-qwidget-window-icons

class QuickWindow : public QQuickWindow
{
....
//mains.cpp
qmlRegisterType<QuickWindow>("QuickWindow",1,0, "QuickWindow");
...
//main.qml
QuickWindow {
 ...
    windowIcon: "GUI/img/Radiation.png"

but i still have the default icon.

Does anyone know hos to fix this ?

Qt 5.11 Mingw
Win 7 x64

Googled : it looks like there is a probleme with w7.

One solution in Srackoverflow is : https://stackoverflow.com/questions/19587359/qapplicationsetwindowicon-works-on-windows-xp-but-does-not-work-on-windows-7

• lcreate directory imageformats in application dir,

• copy qico.dll in it. // Where is this dll ?

Thx in advance

[LeLev]

@J.Hilk hi, thanks for reply

finnaly deleting the buildfolder and using setWindowIcon() worked

 QGuiApplication::setWindowIcon(QIcon(":/GUI/img/Radiation.png"));

thx

[J.Hilk]

@LeLev
Hi,

let us check some points to remove the most common errors :)

• Radiation.png is part of your QtRessource file?
• Did you add Radiation.png later to your ressource file
• • If yes, make sure you run qmake again, or delete the buildfolder, so that the image is compiled into your binary correctly.
• Did you include QIcon #include <QIcon> in your main.cpp ?
• the qml ressource path should also start with :/GUI in your example it starts with GUI, typo?

[LeLev]

@J.Hilk hi, thanks for reply

finnaly deleting the buildfolder and using setWindowIcon() worked

 QGuiApplication::setWindowIcon(QIcon(":/GUI/img/Radiation.png"));

thx