Qt Memory Error ?

[Pada_]

Windows 8.1 64Bit + Qt Creator 5.4.0 development environment.

Create a ProxyWidget on the QGraphicsView.

Save function & load function developed by yourself.

Save and Recall Function If you execute it repeatedly, the following error occurs.

Is your computer running out of memory?

[J.Hilk]

@pada_ said in Qt Memory Error ?:

Save function & load function developed by yourself.

chances are high the memory leak happens here

[mrjj]

Hi
It seems you leak GDI resources so it asserts on a HDC so
i would check all places where you handle images.
the assert seems to come from

static inline HDC createDC()
{
    HDC display_dc = GetDC(0);
    HDC hdc = CreateCompatibleDC(display_dc);
    ReleaseDC(0, display_dc);
    Q_ASSERT(hdc);
    return hdc;
}

So make sure you are not newing scenes or the view over and over when
loading.

[Pada_]

@mrjj

Thank you for the good answer.
Shouldn't it cause thread repainting of the widget?

[Christian Ehrlicher]

@pada_ said in Qt Memory Error ?:

Shouldn't it cause thread repainting of the widget?

You must not paint on a widget outside the main thread.

[mrjj]

Hi
You really need to show your code for
Save and Recall Function code if we should have a chance to guess
why your app seems to eat GDI resources and/or leak memory.