Add a "whitebar" for touch ownership testing

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

1 files changed, 15 insertions, 3 deletions

diff --git a/multitouch.c b/multitouch.c
index 743ca96..7234a76 100644
--- a/multitouch.c
+++ b/multitouch.c
@@ -25,6 +25,7 @@ static void usage(void)
     printf("Usage:\n");
     printf("	Grey window: normal touch surface\n");
     printf("	Black bar left: grabs the touchpoint, no ownership\n");
+    printf("	White bar left: grabs the touchpoint, with ownership\n");
 }
 
 enum TouchState {
@@ -53,6 +54,7 @@ struct multitouch {
     Window root;
     Window win;
     Window blackbar;
+    Window whitebar;
     GC gc;
     Visual *visual;
     int xi_opcode;
@@ -117,9 +119,15 @@ static void init_windows(struct multitouch *mt)
 
     win = XCreateSimpleWindow(mt->dpy, mt->root, 0, 0, mt->width, mt->height,
                               0, 0, WhitePixel(mt->dpy, mt->screen_no));
+    mt->win = win;
 
-    subwin = XCreateSimpleWindow(mt->dpy, win, 0, 0, 50, mt->height, 0, 0,
+    subwin = XCreateSimpleWindow(mt->dpy, win, 0, 0, 50, mt->height/2, 0, 0,
                                  BlackPixel(mt->dpy, mt->screen_no));
+    mt->blackbar = subwin;
+
+    subwin = XCreateSimpleWindow(mt->dpy, win, 0, mt->height/2, 50, mt->height/2, 0, 0,
+                                 WhitePixel(mt->dpy, mt->screen_no));
+    mt->whitebar = subwin;
 
     /* select for touch events on main window */
     XSelectInput(mt->dpy, win, ExposureMask);
@@ -138,8 +146,6 @@ static void init_windows(struct multitouch *mt)
 
     XISelectEvents(mt->dpy, win, &evmask, 1);
 
-    mt->win = win;
-    mt->blackbar = subwin;
 
     /* grab touch events on blackbar */
     modifiers.modifiers = XIAnyModifier;
@@ -147,6 +153,12 @@ static void init_windows(struct multitouch *mt)
                          XINoOwnerEvents, &evmask, 1, &modifiers) != 0)
         error("Failed to establish passive grab on blackbar\n");
 
+    /* grab touch events with ownership on whitebar */
+    XISetMask(mask, XI_TouchOwnership);
+    if (XIGrabTouchBegin(mt->dpy, XIAllMasterDevices, mt->whitebar,
+                         XINoOwnerEvents, &evmask, 1, &modifiers) != 0)
+        error("Failed to establish passive grab on blackbar\n");
+
     XSync(mt->dpy, False);
 }