<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 12 (filtered medium)"> <style>  </style>  </head> <body lang=EN-GB link=blue vlink=purple> <div class=Section1> Hello, I was hoping someone might be able to help me out with a problem I am having with the XTest Extension. <o:p></o:p> What I am trying to do is select on ButtonPress events that occur anywhere on the desktop. I am doing this by creating a transparent window that covers the entire desktop, and selects on ButtonPressMask. In my event loop I am unmapping this window (or moving it, both work). and then using XTestFakeMotionEvent to pass the event back to the desktop without this window in the way. <o:p></o:p> This seems to work well, but only when I have a delay on the XTestFakeMotionEvent of more then 100. and sometimes at this value it is unreliable. CurrentTime, or 0 do not work atall. 200+, works all of the time, however there is a noticeable lag between the actual button press event and the time the underlying window recieves it. <o:p></o:p> I have tried using XFlush() in various places, but this doesn't seem to help. <o:p></o:p> Below is a test project that should show my problem. Any assistance would be greatly appriciated. <o:p></o:p> Thanks<o:p></o:p> #include <X11/extensions/XTest.h> #include <X11/Xutil.h> #include <stdio.h> <o:p></o:p> int main() { <o:p></o:p> Display* display = XOpenDisplay(NULL); int done; XSetWindowAttributes attr; attr.do_not_propagate_mask = 0; attr.override_redirect = True; attr.cursor = None; attr.border_pixel = BlackPixel(display, 0); attr.event_mask = PointerMotionMask | ButtonPressMask | ButtonReleaseMask | KeyPressMask | KeyReleaseMask | KeymapStateMask | PropertyChangeMask; <o:p></o:p> Window root,child; int rootx,rooty,winx,winy; unsigned int maskret; XQueryPointer(display,DefaultRootWindow (display),&root,&child,&rootx,&rooty,&winx,&winy,&maskret); Window window = XCreateWindow(display, DefaultRootWindow(display), rootx, rooty,50, 50, 5, CopyFromParent , InputOutput, CopyFromParent, CWBorderPixel| CWDontPropagate | CWEventMask | CWOverrideRedirect | CWCursor, &attr); XSelectInput(display,window,PointerMotionMask|LeaveWindowMask| ButtonPressMask); XMapRaised(display, window); <o:p></o:p> for (done =0;!done;) { XEvent event; XNextEvent(display,&event); if (event.type == ButtonPress) { <o:p></o:p> XUnmapWindow(display,window); printf("%s\n","1"); XButtonEvent buttonEvent = *(XButtonEvent*)&event; printf("X : %d, Y : %d\n",buttonEvent.x_root,buttonEvent.y_root); XTestFakeButtonEvent(display,buttonEvent.button,true,200); XTestFakeButtonEvent(display,buttonEvent.button,false,200); XFlush(display); XMapRaised(display,window); printf("%s\n","ButtonPress"); } } return 0; <o:p></o:p> <o:p> </o:p> </div> </body> </html>