Beginners: set external stylesheet for qmessagebox background

[Sam]

For the QDialog no need to override the paintEvent().

[SherifOmran]

It does not work.

I added the following in the style sheet editor, my class is called Browse, it is a browse window with listview and tree
@
Browse {
border: 3px solid gray;
background: QLinearGradient(x1: 0, y1: 0, x2: 0.9, y2: 0.9, stop: 0 #FF0000, stop: 1 #FFFFFF );
}
@

in cpp
@
void Browse::paintEvent(QPaintEvent *)
{
QStyleOption opt;
opt.init(this);
QPainter p(this);
style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);
}
@

in h
@

protected:
void paintEvent(QPaintEvent* event);

@

[Sam]

If you are subclassing QDialog you need not override paintEvent() .

Can you paste the implementation code for your class.
Also try #Browse in your stylesheet.qss and check if it works.

If you are creating an instance of your class you can also use
@yourClassInstance->setStyleSheet(styleSheet.readAll());@

[Rahul Das]

@w->setstylesheet()@

w is the instance. And use -> , and not . (dot) operator for the pointer to the instances.

[SherifOmran]

It does not work
@
Browse * w = new Browse(dB_Users, AppPath);
w->setObjectName("myBrowse");
Browse.setStyleSheet(styleSheet.readAll());
int ret=w->exec();
@

I tried the following but it does not work either. (Qwidget.style sheet does not have class type)
@
w->setstylesheet(stylesheet.readall());
@

[Sam]

Ok for a test application I have created a dialog that consist of a single pushButton :-

.h
@class Browse : public QDialog
{
Q_OBJECT

public:
explicit Browse(QWidget *parent = 0);
~Browse();

private:
Ui::Browse *ui;
};@

.cpp
@Browse::Browse(QWidget *parent) :
QDialog(parent),
ui(new Ui::Browse)
{
ui->setupUi(this);
}

Browse::~Browse()
{
delete ui;
}@

main.cpp

@int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Browse *w = new Browse();

QFile styleSheet("C:/temp/style.qss");

if (!styleSheet.open(QIODevice::ReadOnly)) {
    qWarning("Unable to open style.qss");
    return 0;
 }
w->setStyleSheet(styleSheet.readAll());
w->show();


return a.exec();

}@

and for the style.qss file i have specified :-

@QDialog{
border: 3px solid gray;
background-color: qlineargradient(x1: 0, y1: 0, x2: 0.6, y2: 0.6, stop: 0.6 white, stop: 1 gray);
}

QPushButton {
background-color: yellow;
border: 2px solid red;
}@

and here is the output :- !http://img163.imageshack.us/img163/3977/capturehug.png(text)!

"Check here":http://imageshack.us/photo/my-images/163/capturehug.png/

[SherifOmran]

Thank you SAM but the difference from my application is that Browse is created from a login class and not from the main window. Could you please test it?

• main
  • login
    • browse

Stylesheet of login works. But for browse not. Also, I don't use a style sheet file, I use the style sheet editor when i open login form and right click, select change style. does this make a difference?

[Sam]

Just for the test , you can use write the required styles to a .qss file and read the file and use setStyleSheet() .

Also for the approach that you are using through the Qt Designer. Try to use

@QDialog {
background-color: red
}@

or

@#Browse {
background-color: red
}@

but then do not use setStyleSheet() inside the code otherwise it will overwrite the above.

[SherifOmran]

Thats what I made, but it does not work on my MAC. I don't use setstylesheet but when I used it once, it worked. Setstylesheet will hardcode it.

[SherifOmran]

I found the mistake . Thank you guys

@
Browse * w = new Browse(dB_Users, AppPath);
@

should have been

@
Browse * w = new Browse(dB_Users, AppPath,this);
@

[Sam]

Great!!!

Kindly Edit your first post and prepend [Solved] to it.

Happy Coding.