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device: Add a num-touches property

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Some backends can provide this information for touch devices,
and it can be useful to have, so add this property.
This commit is contained in:
Matthias Clasen 2016-02-25 08:25:14 -05:00
parent 1977994128
commit f468f0fbb2
2 changed files with 26 additions and 0 deletions
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25
gdk/gdkdevice.c
View File

@ -91,6 +91,7 @@ enum {
PROP_VENDOR_ID,
PROP_PRODUCT_ID,
PROP_SEAT,
PROP_NUM_TOUCHES,
LAST_PROP
};
@ -287,6 +288,24 @@ gdk_device_class_init (GdkDeviceClass *klass)
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS);
/**
* GdkDevice:num-touches:
*
* The maximal number of concurrent touches on a touch device.
* Will be 0 if the device is not a touch device or if the number
* of touches is unknown.
*
* Since: 3.20
*/
device_props[PROP_NUM_TOUCHES] =
g_param_spec_uint ("num-touches",
P_("Number of concurrent touches"),
P_("Number of concurrent touches"),
0, G_MAXUINT,
0,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (object_class, LAST_PROP, device_props);
/**
@ -400,6 +419,9 @@ gdk_device_set_property (GObject *object,
case PROP_SEAT:
device->seat = g_value_get_object (value);
break;
case PROP_NUM_TOUCHES:
device->num_touches = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -452,6 +474,9 @@ gdk_device_get_property (GObject *object,
case PROP_SEAT:
g_value_set_object (value, device->seat);
break;
case PROP_NUM_TOUCHES:
g_value_set_uint (value, device->num_touches);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;

1
gdk/gdkdeviceprivate.h
View File

@ -57,6 +57,7 @@ struct _GdkDevice
GList *slaves;
GdkDeviceType type;
GArray *axes;
guint num_touches;
gchar *vendor_id;
gchar *product_id;