Cannot remove fullscreen window border

Boofish

Hello,

I'm using qt 4.8.7 and trying to create a borderless fullscreen window on linux (ubuntu) and also on embedded. I use the following code:

```
MainWidget widget;
widget.window()->setFixedSize(QSize(SCENE_WIDTH, SCENE_HEIGHT));
widget.setWindowFlags(Qt::CustomizeWindowHint | Qt::FramelessWindowHint);

// add QGraphicsScene

widget.showFullScreen();

The result is this:

![0_1559559476329_borderedWindow.png](https://ddgobkiprc33d.cloudfront.net/61c2c6d5-6ed9-40ec-bea1-3cf89181b325.png)

As you can see there is a grey border. How do  I remove it?

Boofish

The solution to this on qt 4.8.7 is to call setFrameStyle on the qgraphicsview like so:

QGraphicsView view;
view.setFrameStyle(QFrame::NoFrame);

jsulm

@Boofish Why do you set fixed window size if you want to show as full-screen?

Boofish

@jsulm Is that related? The code uses a fixed size because I run the application on both the target board (embedded) that uses resolution 800x480 as well as on ubuntu dev machine that uses 1920x1080. The SCENE_WIDTH is 800, and SCENE_HEIGHT is 480. There is a border on both.

Boofish

The solution to this on qt 4.8.7 is to call setFrameStyle on the qgraphicsview like so:

QGraphicsView view;
view.setFrameStyle(QFrame::NoFrame);