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motion controller: Add focus properties

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Add boolean properties, is-pointer-focus and
contains-pointer-focus, that track whether the pointer
is in the widget itself or in one of its descendants.
This commit is contained in:
Matthias Clasen 2019-03-16 23:29:48 -04:00
parent 1540797237
commit ecd6446d08
1 changed files with 123 additions and 0 deletions
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123
gtk/gtkeventcontrollermotion.c
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@ -38,6 +38,9 @@
struct _GtkEventControllerMotion
{
GtkEventController parent_instance;
guint is_pointer_focus : 1;
guint contains_pointer_focus : 1;
};
struct _GtkEventControllerMotionClass
@ -52,14 +55,67 @@ enum {
N_SIGNALS
};
enum {
PROP_IS_POINTER_FOCUS = 1,
PROP_CONTAINS_POINTER_FOCUS,
NUM_PROPERTIES
};
static GParamSpec *props[NUM_PROPERTIES] = { NULL, };
static guint signals[N_SIGNALS] = { 0 };
G_DEFINE_TYPE (GtkEventControllerMotion, gtk_event_controller_motion, GTK_TYPE_EVENT_CONTROLLER)
static void
update_pointer_focus (GtkEventControllerMotion *motion,
gboolean enter,
GdkNotifyType detail)
{
gboolean is_pointer;
gboolean contains_pointer;
switch (detail)
{
case GDK_NOTIFY_VIRTUAL:
case GDK_NOTIFY_NONLINEAR_VIRTUAL:
is_pointer = FALSE;
contains_pointer = enter;
break;
case GDK_NOTIFY_ANCESTOR:
case GDK_NOTIFY_NONLINEAR:
is_pointer = enter;
contains_pointer = FALSE;
break;
case GDK_NOTIFY_INFERIOR:
is_pointer = enter;
contains_pointer = !enter;
break;
case GDK_NOTIFY_UNKNOWN:
default:
g_warning ("Unknown crossing detail");
return;
}
g_object_freeze_notify (G_OBJECT (motion));
if (motion->is_pointer_focus != is_pointer)
{
motion->is_pointer_focus = is_pointer;
g_object_notify (G_OBJECT (motion), "is-pointer-focus");
}
if (motion->contains_pointer_focus != contains_pointer)
{
motion->contains_pointer_focus = contains_pointer;
g_object_notify (G_OBJECT (motion), "contains-pointer-focus");
}
g_object_thaw_notify (G_OBJECT (motion));
}
static gboolean
gtk_event_controller_motion_handle_event (GtkEventController *controller,
const GdkEvent *event)
{
GtkEventControllerMotion *motion = GTK_EVENT_CONTROLLER_MOTION (controller);
GtkEventControllerClass *parent_class;
GdkEventType type;
@ -73,6 +129,9 @@ gtk_event_controller_motion_handle_event (GtkEventController *controller,
gdk_event_get_coords (event, &x, &y);
gdk_event_get_crossing_mode (event, &mode);
gdk_event_get_crossing_detail (event, &detail);
update_pointer_focus (motion, TRUE, detail);
g_signal_emit (controller, signals[ENTER], 0, x, y, mode, detail);
}
else if (type == GDK_LEAVE_NOTIFY)
@ -82,6 +141,9 @@ gtk_event_controller_motion_handle_event (GtkEventController *controller,
gdk_event_get_crossing_mode (event, &mode);
gdk_event_get_crossing_detail (event, &detail);
update_pointer_focus (motion, FALSE, detail);
g_signal_emit (controller, signals[LEAVE], 0, mode, detail);
}
else if (type == GDK_MOTION_NOTIFY)
@ -97,13 +159,74 @@ gtk_event_controller_motion_handle_event (GtkEventController *controller,
return parent_class->handle_event (controller, event);
}
static void
gtk_event_controller_motion_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkEventControllerMotion *controller = GTK_EVENT_CONTROLLER_MOTION (object);
switch (prop_id)
{
case PROP_IS_POINTER_FOCUS:
g_value_set_boolean (value, controller->is_pointer_focus);
break;
case PROP_CONTAINS_POINTER_FOCUS:
g_value_set_boolean (value, controller->contains_pointer_focus);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gtk_event_controller_motion_class_init (GtkEventControllerMotionClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkEventControllerClass *controller_class = GTK_EVENT_CONTROLLER_CLASS (klass);
object_class->get_property = gtk_event_controller_motion_get_property;
controller_class->handle_event = gtk_event_controller_motion_handle_event;
/**
* GtkEventControllerMotion:is-pointer-focus:
*
* Whether the pointer is in the controllers widget itself,
* as opposed to in a descendent widget. See
* #GtkEventControllerMotion:contains-pointer-focus.
*
* When handling crossing events, this property is updated
* before #GtkEventControllerMotion::enter or
* #GtkEventControllerMotion::leave are emitted.
*/
props[PROP_IS_POINTER_FOCUS] =
g_param_spec_boolean ("is-pointer-focus",
P_("Is Pointer Focus"),
P_("Whether the pointer is in the controllers widget"),
FALSE,
G_PARAM_READABLE);
/**
* GtkEventControllerMotion:contains-pointer-focus:
*
* Whether the pointer is in a descendant of the controllers widget.
* See #GtkEventControllerMotion:is-pointer-focus.
*
* When handling crossing events, this property is updated
* before #GtkEventControllerMotion::enter or
* #GtkEventControllerMotion::leave are emitted.
*/
props[PROP_CONTAINS_POINTER_FOCUS] =
g_param_spec_boolean ("contains-pointer-focus",
P_("Contains Pointer Focus"),
P_("Whether the pointer is in a descendant of the controllers widget"),
FALSE,
G_PARAM_READABLE);
/**
* GtkEventControllerMotion::enter:
* @controller: The object that received the signal