Method idleCallback

tests/NanoSubWidgets.cpp:94–117

    }

    void idleCallback() override
    {
        switch (rectToHide)
        {
        case 1:
            rect1.hide();
            rect2.show();
            rect3.show();
            rectToHide = 2;
            break;
        case 2:
            rect1.show();
            rect2.hide();
            rect3.show();
            rectToHide = 3;
            break;
        case 3:
            rect1.show();
            rect2.show();
            rect3.hide();
            rectToHide = 1;
            break;
        }
    }

private:
    NanoRectangle rect1, rect2, rect3;