wayland: Create/expose pad devices

These devices are kind of an strange case. Their "master" device is
the keyboard, because they share toplevel focus with it, regardless
of stylus focus. Nonetheless, they are only expected to send the
GdkEventPad* set of events.

https://bugzilla.gnome.org/show_bug.cgi?id=770026

diff --git a/gdk/wayland/gdkdevice-wayland.c b/gdk/wayland/gdkdevice-wayland.c
index 627f6494efaded459f074e544ecaa250ea234f13..84c39ecb4b72eba90967f6b5a0baa0f01b08d830 100644 (file)
--- a/gdk/wayland/gdkdevice-wayland.c
+++ b/gdk/wayland/gdkdevice-wayland.c
@@ -2766,6 +2766,14 @@ _gdk_wayland_seat_remove_tablet_pad (GdkWaylandSeat          *seat,
     GDK_WAYLAND_DEVICE_MANAGER (seat->device_manager);
 
   seat->tablet_pads = g_list_remove (seat->tablet_pads, pad);
+
+  device_manager->devices =
+    g_list_remove (device_manager->devices, pad->device);
+  g_signal_emit_by_name (device_manager, "device-removed", pad->device);
+
+  _gdk_device_set_associated_device (pad->device, NULL);
+
+  g_object_unref (pad->device);
   g_free (pad);
 }
 
@@ -4089,7 +4097,26 @@ static void
 tablet_pad_handle_done (void                     *data,
                         struct zwp_tablet_pad_v2 *wp_tablet_pad)
 {
+  GdkWaylandTabletPadData *pad = data;
+  GdkWaylandSeat *seat = GDK_WAYLAND_SEAT (pad->seat);
+  GdkWaylandDeviceManager *device_manager =
+    GDK_WAYLAND_DEVICE_MANAGER (seat->device_manager);
+
   g_debug (G_STRLOC ": %s pad = %p", G_STRFUNC, wp_tablet_pad);
+
+  pad->device =
+    g_object_new (GDK_TYPE_WAYLAND_DEVICE_PAD,
+                  "name", "Pad device",
+                  "type", GDK_DEVICE_TYPE_SLAVE,
+                  "input-source", GDK_SOURCE_TABLET_PAD,
+                  "input-mode", GDK_MODE_SCREEN,
+                  "display", gdk_seat_get_display (pad->seat),
+                  "device-manager", device_manager,
+                  "seat", seat,
+                  NULL);
+
+  _gdk_device_set_associated_device (pad->device, seat->master_keyboard);
+  g_signal_emit_by_name (device_manager, "device-added", pad->device);
 }
 
 static void