<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><p style="font-family: Verdana, Arial, 'Bitstream Vera Sans', Helvetica, sans-serif; font-size: 13px;" class="">Hi Edoardo,</p><p style="font-family: Verdana, Arial, 'Bitstream Vera Sans', Helvetica, sans-serif; font-size: 13px;" class="">We don’t have multitouch (2 and 3 finger drag) in ChimeraX currently.</p><p style="font-family: Verdana, Arial, 'Bitstream Vera Sans', Helvetica, sans-serif; font-size: 13px;" class="">A few years ago I used the Qt window toolkit to handle multitouch events. Qt 5.2(?) had multitouch disabled on Mac OS because it supposedly interfered with scrolling. I don't think I observed that scrolling problem. But I had to write some C++ code that called a native Mac OS method to get touch events, a pretty ugly hack to get it to work.<br class=""></p><p style="font-family: Verdana, Arial, 'Bitstream Vera Sans', Helvetica, sans-serif; font-size: 13px;" class="">The current state in Qt 5.9 seems that multitouch events work with Qt widgets. But we need them to work on the graphics area which is a QWindow (for drawing OpenGL 3D graphics). The following Qt bug report (53874) from June 2016 indicates that getting multitouch events on Mac in a QWindow does not work despite the documentation saying it is supposed to work.<br class=""></p><p style="font-family: Verdana, Arial, 'Bitstream Vera Sans', Helvetica, sans-serif; font-size: 13px;" class=""><a class="ext-link" href="https://bugreports.qt.io/browse/QTBUG-53874" style="text-decoration: none; color: rgb(187, 0, 0); border-bottom-width: 1px; border-bottom-style: dotted; border-bottom-color: rgb(187, 187, 187);"><span class="icon" style="background-image: url(https://www.rbvi.ucsf.edu/trac/ChimeraX/chrome/common/extlink.gif); padding-left: 15px; background-position: left center; background-repeat: no-repeat no-repeat;"></span>https://bugreports.qt.io/browse/QTBUG-53874</a><br class=""></p><p style="font-family: Verdana, Arial, 'Bitstream Vera Sans', Helvetica, sans-serif; font-size: 13px;" class="">A comment from the Qt developer Morten Sørvig assigned to this ticket indicates it still will require a C++ hack to get multitouch events. "Touch events need to be enabled on a per-QWindow basis on OS X. Widgets and Quick currently do this via the private function QCocoaNativeInterface::registerTouchWindow(). This means there is currently no way to get touch evens via QWindow::touchEvent() on OS X using public API only."<br class=""></p><p style="font-family: Verdana, Arial, 'Bitstream Vera Sans', Helvetica, sans-serif; font-size: 13px;" class="">I think the same hack I used in the past can get by this problem. But I don't thick trackpad handling on Mac is important enough relative to other priorities to work on it right now.</p><div class="">Here is the ChimeraX ticket to monitor progress on this issue. This URL is currently password protected but we are working to make the ChimeraX bug/feature database visible to the public.</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span><a href="https://www.rbvi.ucsf.edu/trac/ChimeraX/ticket/427" class="">https://www.rbvi.ucsf.edu/trac/ChimeraX/ticket/427</a></div><div class=""><br class=""></div><div class=""> Tom</div><div class=""><br class=""></div><div class=""><br class=""></div><div><blockquote type="cite" class=""><div class="">On Sep 15, 2017, at 3:39 AM, Edoardo Gianni <<a href="mailto:egianni@mrc-lmb.cam.ac.uk" class="">egianni@mrc-lmb.cam.ac.uk</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Hello,<br class=""><br class="">I was wondering if multitouch was available on chimerax for mac, or if you had plans to implement it in the future.<br class=""><br class="">Thanks and best wishes,<br class="">Edoardo<br class="">_______________________________________________<br class="">ChimeraX-users mailing list<br class=""><a href="mailto:ChimeraX-users@cgl.ucsf.edu" class="">ChimeraX-users@cgl.ucsf.edu</a><br class="">Manage subscription:<br class="">http://www.rbvi.ucsf.edu/mailman/listinfo/chimerax-users<br class=""><br class=""></div></div></blockquote></div><br class=""></body></html>