device: Add gdk_device_get_axes(), and ::axes property

This returns a GdkAxisFlags, holding the axes currently available
through this device.

1 files changed, 39 insertions, 0 deletions

diff --git a/gdk/gdkdevice.c b/gdk/gdkdevice.c
index 3edaa526f0..0ede56cd43 100644
--- a/gdk/gdkdevice.c
+++ b/gdk/gdkdevice.c
@@ -92,6 +92,7 @@ enum {
   PROP_PRODUCT_ID,
   PROP_SEAT,
   PROP_NUM_TOUCHES,
+  PROP_AXES,
   LAST_PROP
 };
 
@@ -305,6 +306,19 @@ gdk_device_class_init (GdkDeviceClass *klass)
                          0,
                          G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
                          G_PARAM_STATIC_STRINGS);
+  /**
+   * GdkDevice:axes:
+   *
+   * The axes currently available for this device.
+   *
+   * Since: 3.22
+   */
+  device_props[PROP_AXES] =
+    g_param_spec_flags ("axes",
+                        P_("Axes"),
+                        P_("Axes"),
+                        GDK_TYPE_AXIS_FLAGS, 0,
+                        G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
 
   g_object_class_install_properties (object_class, LAST_PROP, device_props);
 
@@ -477,6 +491,9 @@ gdk_device_get_property (GObject    *object,
     case PROP_NUM_TOUCHES:
       g_value_set_uint (value, device->num_touches);
       break;
+    case PROP_AXES:
+      g_value_set_flags (value, device->axis_flags);
+      break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -1515,7 +1532,10 @@ _gdk_device_reset_axes (GdkDevice *device)
   for (i = device->axes->len - 1; i >= 0; i--)
     g_array_remove_index (device->axes, i);
 
+  device->axis_flags = 0;
+
   g_object_notify_by_pspec (G_OBJECT (device), device_props[PROP_N_AXES]);
+  g_object_notify_by_pspec (G_OBJECT (device), device_props[PROP_AXES]);
 }
 
 guint
@@ -1556,7 +1576,10 @@ _gdk_device_add_axis (GdkDevice   *device,
   device->axes = g_array_append_val (device->axes, axis_info);
   pos = device->axes->len - 1;
 
+  device->axis_flags |= (1 << use);
+
   g_object_notify_by_pspec (G_OBJECT (device), device_props[PROP_N_AXES]);
+  g_object_notify_by_pspec (G_OBJECT (device), device_props[PROP_AXES]);
 
   return pos;
 }
@@ -1964,3 +1987,19 @@ gdk_device_get_seat (GdkDevice *device)
 
   return device->seat;
 }
+
+/**
+ * gdk_device_get_axes:
+ * @device: a #GdkDevice
+ *
+ * Returns the axes currently available on the device.
+ *
+ * Since: 3.22
+ **/
+GdkAxisFlags
+gdk_device_get_axes (GdkDevice *device)
+{
+  g_return_val_if_fail (GDK_IS_DEVICE (device), 0);
+
+  return device->axis_flags;
+}