Don't you have access to the source code ?
And if not, ask the authors ?

Also, you can move the code that actually creates/adds the buttons to a separate class method and then call it from both the constructor and when you get a signal that new files were added. I am not sure what 'reloop constructor' means, but you do not want to try to call the constructor again.

@TrahdBoy hi,

It's all explained here.

@DougyDrumz2 said in How do I make a QLabel Blink?:

The consensus is evidently to l hide and show a QLabel

Not my "consensus :) So far as I am aware, hiding can cause different layout redraw in at least some circumstances. I retain visibility but toggle foreground color to QColor(Qt::transparent) or toggle alpha color value between 255 (opaque) and 0 (transparent) on palette QPalette::setColor(QPalette::Text, colour).

Also, creating multiple QTimer::singleShot()s doesn't scale very well if you want to change the number of flashes or the interval between. Or of you have multiple labels to blink and you'd like them all to be "in sync". I use one regular repeating QTimer with a "countdown" and cancellation when it reaches 0.

Up to you on both of these.

@Christian-Ehrlicher thank you, i understand my mistake and solve it.

@suslucoder
I'm sorry if you feel I'm being hard on you. Quite a few of your questions are things you really should be able to solve for yourself, not ask questions of other people. It may not seem like it, but in the long run reading documentation and solving things for yourself is the only way to learn. I will leave it at that now.

BTW,

I copied "ui_mainwindow.h" file from another build file

This may or may not be right, depending on just what you did where. The ui_mainwindow.h has to be regenerated every time you edit in Designer to change the mainwindow.ui file. If you later find that you make changes in Designer and these are not reflected in your code, you will have hit a problem. Just saying.

Hi
Just as a note.
It's also possible to do signal to signal connects.
So if MainWindow just needs to know data has changed to reload something
then you could also

Define new Signal in class A
void DataChangedForB

and internally when you create the B's, connect B's
signal datachanged to A::DataChangedForB signal

And then in MainWindow, simply connect Mains slot to
the new A::DataChangedForB signal

However, if you are using sender() to access the B' instance, this wont work.

@JonB Not a big viewer at all. viewer is a simple QGraphicsView containing a QPixmapItem which is continually updated through another slot taking a signal from the camera thread every time it has a new frame, at 60fps.

Part of the issue seems to be with the debug build, which is obviously a fair bit slower than release. In release it doesn't really seem noticeable, though I imagine it might be on a slow system. Still, I do find the asynchronous behaviour of raise() interesting. I tried looking a bit at the source code, but didn't really get anywhere. Because it's not a problem in release, I guess I'll just leave it be for now. Thanks for the help, though, much appreciated.

@Burke212
Given that you are not using the designer, create your own QWidget *mainWidget and at some point call setCentralWidget(mainWidget). You can add your widgets onto your mainWidget before or after setting it as your central widget, I don't think it matters.

So just one "main widget", which you create, and then you set the main window to have that as its central widget.

@milan said in How to add qml to mainwindow ui file:

Can somebody help me how to add qml to mainwindow ui. I added a QQuickwidget in mainwindow.ui from designer.

Then I added following code:

QQuickView *qmlView = new QQuickView(); qmlView->setSource(QUrl::fromLocalFile("test.qml")); ui->widget->createWindowContainer(qmlView, this);

If you added a QQuickWidget via designer, why adding anoher QQuickView via code!?

just access your QuickWidget and set the source:

ui->quickWidget->setSource(QUrl(QStringLiteral("qrc:/test.qml")));

@Ratzz
Thanks for your references.

additionaly to what @raven-worx said, you can try setting this windowflag

setWindowFlag(Qt::MaximizeUsingFullscreenGeometryHint,true);

this should paint the window over everything.

Thanks guys for replies, generally my app isn't well designed because it's for education purpose. Anyway thank you very much.

Move the Qn to solved state. This helps others as well

Works, thank you.

@SGaist
I just want 1 window with the forms changing for the login and presentation windows.
And then ill use dialog windows after the presentation window.
Anyways thank you. Ill try QStackedWidget.

hi

in mainwindow.h

instead of
#include "employeeinfo.h" << this already included so not working here.

we do
class employeeinfo; <<< this is a forward.

Since you do
employeeinfo *emp;

a forward is allowed. ( that is what @Wurgl explained , much better than this :)

@mrjj
Got it , Thanks :)

@jsulm
Yes. I tried before your post and it works!

Thank you all...