<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style> </head> <body dir="ltr"> <div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> <span style="margin:0px;font-size:12pt;background-color:rgb(255, 255, 255)">Hello Uli,</span> <div style="margin:0px;font-size:12pt;background-color:rgb(255, 255, 255)"><br> </div> <div style="margin:0px;font-size:12pt;background-color:rgb(255, 255, 255)">a nice thing, in this case, of objc, is that it is a superset of C; so each call to xcb library is just pure C.</div> <div style="margin:0px;font-size:12pt;background-color:rgb(255, 255, 255)"><br> </div> <div style="margin:0px;font-size:12pt;background-color:rgb(255, 255, 255)">The code where a window is moved is here in the XCBFrame class method moveTo (to be accurate, in Objective-C methods are called messages):<br> <br> <a href="https://github.com/AlessandroSangiuliano/XcbKit/blob/70-resizing/XCBKit/XCBFrame.m#L602" target="_blank" rel="noopener noreferrer" data-auth="NotApplicable" style="margin:0px">https://github.com/AlessandroSangiuliano/XcbKit/blob/70-resizing/XCBKit/XCBFrame.m#L602</a> </div> <div style="margin:0px;font-size:12pt;background-color:rgb(255, 255, 255)"><br> </div> <div style="margin:0px;font-size:12pt;background-color:rgb(255, 255, 255)">called from XCBConnection class method handleMotionNotify, here:</div> <div style="margin:0px;font-size:12pt;background-color:rgb(255, 255, 255)"><br> </div> <div style="margin:0px;font-size:12pt;background-color:rgb(255, 255, 255)"><a href="https://github.com/AlessandroSangiuliano/XcbKit/blob/70-resizing/XCBKit/XCBConnection.m#L790" target="_blank" rel="noopener noreferrer" data-auth="NotApplicable" style="margin:0px">https://github.com/AlessandroSangiuliano/XcbKit/blob/70-resizing/XCBKit/XCBConnection.m#L790</a></div> <div style="margin:0px;font-size:12pt;background-color:rgb(255, 255, 255)"><br> </div> <div style="margin:0px;font-size:12pt;background-color:rgb(255, 255, 255)">The If checks if we are in drag state and some other validity checks, like "we are not trying to move the root window"<br> <div class="x__Entity x__EType_OWALinkPreview x__EId_OWALinkPreview x__EReadonly_1" style="margin:0px"> </div> <br> </div> <div style="margin:0px;font-size:15px;font-family:"Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif;color:rgb(32, 31, 30);background-color:rgb(255, 255, 255)"> <div style="margin:0px"></div> <div style="margin:0px;font-size:12pt;font-family:Calibri, Helvetica, sans-serif;color:rgb(0, 0, 0)"> The configureClient method is just a C a methiod that set an event and then send it with xcb_send_event.<br> <br> Also, XCBRect, XCBPoint, XCBSize are just C structures. Making these structure as ObjC classes would involve the libobjc2 runtime too much, make all really slow.</div> <div style="margin:0px;font-size:12pt;font-family:Calibri, Helvetica, sans-serif;color:rgb(0, 0, 0)"> <br> </div> <div style="margin:0px;font-size:12pt;font-family:Calibri, Helvetica, sans-serif;color:rgb(0, 0, 0)"> I will try as soon as I can to add this message call on the moving window before the configure_client function:</div> <div style="margin:0px;font-size:12pt;font-family:Calibri, Helvetica, sans-serif;color:rgb(0, 0, 0)"> <br> </div> <div style="margin:0px;font-size:12pt;font-family:Calibri, Helvetica, sans-serif;color:rgb(0, 0, 0)"> [XCBWindow description], this message describe a window, with its rect(s) posizion, size, parent and so on.</div> <div style="margin:0px;font-size:12pt;font-family:Calibri, Helvetica, sans-serif;color:rgb(0, 0, 0)"> <br> </div> <div style="margin:0px;font-size:12pt;font-family:Calibri, Helvetica, sans-serif;color:rgb(0, 0, 0)"> Then I'll report here.</div> <div style="margin:0px;font-size:12pt;font-family:Calibri, Helvetica, sans-serif;color:rgb(0, 0, 0)"> <br> </div> <div style="margin:0px;font-size:12pt;font-family:Calibri, Helvetica, sans-serif;color:rgb(0, 0, 0)"> For x11trace, I have some problem with it, I will try to solve it.</div> <div style="margin:0px;font-size:12pt;font-family:Calibri, Helvetica, sans-serif;color:rgb(0, 0, 0)"> <br> </div> <div style="margin:0px;font-size:12pt;font-family:Calibri, Helvetica, sans-serif;color:rgb(0, 0, 0)"> Cheers,</div> <span style="margin:0px;font-size:12pt;font-family:Calibri, Helvetica, sans-serif;color:rgb(0, 0, 0)">Alex</span></div> <br> </div> <div> <div id="appendonsend"></div> <div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)"> <br> </div> <hr tabindex="-1" style="display:inline-block; width:98%"> <div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>Da:</b> Uli Schlachter <psychon@znc.in><br> <b>Inviato:</b> mercoledė 24 febbraio 2021 20:23<br> <b>A:</b> alex22_7@hotmail.com <alex22_7@hotmail.com>; xcb@lists.freedesktop.org <xcb@lists.freedesktop.org><br> <b>Oggetto:</b> Re: [Xcb] Flickering</font> <div> </div> </div> <div class="BodyFragment"><font size="2"><span style="font-size:11pt"> <div class="PlainText">Hi,<br> <br> Am 24.02.21 um 12:24 schrieb alex22_7@hotmail.com:<br> > Actually I noticed that on moving a window clicking on the title bar I have some flickering.<br> <br> Looks to me as if the window is moved offscreen and then quickly again<br> moved to its "proper position". I'd look at some tracing output to<br> figure this out, e.g. via xtrace (also known as x11trace) on your WM. Or<br> on an app in question to see where it is moved to.<br> <br> Alternatively, you could do some printf-debugging and print the window<br> position before every xcb_configure_window() call to see where it is<br> being moved to.<br> <br> I can't really read objc, but... where is this moving of windows<br> implemented? I tried searching for xcb_configure_window(), but all the<br> hits don't seem relevant to "move by mouse".<br> <br> Cheers,<br> Uli<br> -- <br> - He made himself, me nothing, you nothing out of the dust<br> - Er machte sich mir nichts, dir nichts aus dem Staub<br> </div> </span></font></div> </div> </body> </html>