qlistview select box residual thin line

Problem phenomenon:

When drawing the selection box, some thin lines remain

Steps to reproduce:

Use Fusion style .

Run the example program interview. Use the mouse to draw a selection box in the blank area and make the selection box flip. Such as the practice of GIF in the attachment.

reason:

The problem is here:

https://github.com/qt/qtbase/blob/dev/src/widgets/styles/qfusionstyle.cpp#L1094

rect.adjusted(1, 1, -2, -2) 

makes the rectangle smaller, but when rect.x1-rect.x2 = 0. Then x1 + 1, x2-2 leads to x1> x2. This will make the rectangle flip in advance.

So there is a difference between the updated area and the drawn area.

The rectangle has been drawn at the position of L1090. The drawing of 1094 makes the color darker and adds a one-pixel white border. However, it is difficult to distinguish with the eyes because of transparency, so I think the code of 1094 is redundant.