[SOLVED] How to use QDesktopWidget with QGuiApplication...

tmason101

Hello,

I am trying to build an OpenGL application based on this example code here:

http://qt-project.org/doc/qt-5/qtgui-openglwindow-example.html

I can get the example code to build but now I need a few more things like menus, toolbars, etc.

One of the first things I need is to detect the screen size and place the monitor on the second screen.

Therefore, I was attempting to use QDesktopWidget for this task.

I attempt to initialize the QDesktopWidget instance like so:

@QDesktopWidget* ScreenDetector = QApplication::desktop();@

But since I am using QGuiApplication instead of QApplication I get the following error:

"QWidget: Cannot create a QWidget with QApplication"

Is it possible to use QDesktopWidget and other desktop widgets with QGuiApplication?

Or should I be using another example for what I am trying to do?

Thank you for your time.

SGaist

Hi,

Just replace QGuiApplication with QApplication. QApplication inherits from QGuiApplication.

tmason101

Thanks, that worked!

I have another error message but I will post that in a separate post.

Thanks much.

SGaist

You're welcome !

Since you have your widgets working now, please update the thread title prepending [solved] so other forum users may know a solution has been found :)

tmason101

[quote author="SGaist" date="1410808258"]You're welcome !

Since you have your widgets working now, please update the thread title prepending [solved] so other forum users may know a solution has been found :)[/quote]

You got it.