<div> Dash line takes no effect when porting gtk to xcb. After debug, I found the reason is a bug in enumeration type xcb_cap_style_t. So XCB_CAP_STYLE_BUTT should be 1, and XCB_CAP_STYLE_CAP should be 2, according to X.h
.<br> I have reported the bug at <a href="https://bugs.freedesktop.org/show_bug.cgi?id=8857">https://bugs.freedesktop.org/show_bug.cgi?id=8857</a>.<br> <br>Jianjun</div>