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backend-native: Ensure the pointer is visible on monitors-changed

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Otherwise the pointer might be "lost" outside the visible area. Note
that the constraining code only ensures the pointer doesn't leave the
visible area but if the pointer is already outside because the rug was
pulled under it then it doesn't do anything.

https://bugzilla.gnome.org/show_bug.cgi?id=745121
This commit is contained in:
Rui Matos 2015-02-25 17:01:10 +01:00
parent a1488005b6
commit 9a3b178da1
1 changed files with 31 additions and 0 deletions
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31
src/backends/native/meta-backend-native.c
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@ -179,15 +179,46 @@ pointer_constrain_callback (ClutterInputDevice *device,
constrain_all_screen_monitors(device, monitors, n_monitors, new_x, new_y);
}
static void
on_monitors_changed (MetaMonitorManager *monitor_manager,
MetaBackend *backend)
{
ClutterDeviceManager *manager = clutter_device_manager_get_default ();
ClutterInputDevice *device = clutter_device_manager_get_core_device (manager, CLUTTER_POINTER_DEVICE);
MetaMonitorInfo *monitors, *primary;
unsigned int n_monitors;
ClutterPoint point;
if (!clutter_input_device_get_coords (device, NULL, &point))
return;
monitors = meta_monitor_manager_get_monitor_infos (monitor_manager, &n_monitors);
/* if we're inside a monitor, we're fine */
if (check_all_screen_monitors (monitors, n_monitors, point.x, point.y))
return;
/* warp the pointer to the primary monitor so it isn't lost */
primary = &monitors[meta_monitor_manager_get_primary_index (monitor_manager)];
meta_backend_warp_pointer (backend,
primary->rect.x + primary->rect.width / 2,
primary->rect.y + primary->rect.height / 2);
}
static void
meta_backend_native_post_init (MetaBackend *backend)
{
MetaMonitorManager *monitor_manager;
ClutterDeviceManager *manager = clutter_device_manager_get_default ();
META_BACKEND_CLASS (meta_backend_native_parent_class)->post_init (backend);
clutter_evdev_set_pointer_constrain_callback (manager, pointer_constrain_callback,
NULL, NULL);
monitor_manager = meta_backend_get_monitor_manager (backend);
g_signal_connect_object (monitor_manager, "monitors-changed",
G_CALLBACK (on_monitors_changed), backend, G_CONNECT_AFTER);
}
static MetaIdleMonitor *