[mutter/wip/gestures: 2/14] frame: Only select for ButtonPress/Release/Motion

[Carlos Garnacho <carlosg src gnome org>]

commit 5ff50eb466689556b0ed42803fbca5c37e376cac
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Jun 19 21:15:14 2014 +0200

    frame: Only select for ButtonPress/Release/Motion
    
    Touch events are largely ignored on GdkEvent emulation, so only
    make frames receive pointer events, only the pointer emulating
    touch will be reported, and any other further touches will be
    ignored, which is about the behavior we want. This makes window
    dragging possible again on touch.

 src/core/frame.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/src/core/frame.c b/src/core/frame.c
index 0895241..3e699a6 100644
--- a/src/core/frame.c
+++ b/src/core/frame.c
@@ -109,6 +109,17 @@ meta_window_ensure_frame (MetaWindow *window)
   XChangeWindowAttributes (window->display->xdisplay,
                           frame->xwindow, CWEventMask, &attrs);
 
+  {
+    unsigned char mask_bits[XIMaskLen (XI_LASTEVENT)] = { 0 };
+    XIEventMask mask = { XIAllMasterDevices, sizeof (mask_bits), mask_bits };
+
+    XISetMask (mask.mask, XI_ButtonPress);
+    XISetMask (mask.mask, XI_ButtonRelease);
+    XISetMask (mask.mask, XI_Motion);
+
+    XISelectEvents (window->display->xdisplay, frame->xwindow, &mask, 1);
+  }
+
   meta_display_register_x_window (window->display, &frame->xwindow, window);
 
   meta_error_trap_push (window->display);