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gtk/gdk/gdkevents.c
Emmanuele Bassi f28aa1ba02 Restructure the GdkEvent type hierarchy 
GdkEvent has been a "I-can't-believe-this-is-not-OOP" type for ages,
using a union of sub-types. This has always been problematic when it
comes to implementing accessor functions: either you get generic API
that takes a GdkEvent and uses a massive switch() to determine which
event types have the data you're looking for; or you create namespaced
accessors, but break language bindings horribly, as boxed types cannot
have derived types.

The recent conversion of GskRenderNode (which had similar issues) to
GTypeInstance, and the fact that GdkEvent is now a completely opaque
type, provide us with the chance of moving GdkEvent to GTypeInstance,
and have sub-types for GdkEvent.

The change from boxed type to GTypeInstance is pretty small, all things
considered, but ends up cascading to a larger commit, as we still have
backends and code in GTK trying to access GdkEvent structures directly.
Additionally, the naming of the public getter functions requires
renaming all the data structures to conform to the namespace/type-name
pattern.
2020-04-16 19:54:02 +01:00

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gdkintl.h"
#include "gdkeventsprivate.h"
#include "gdkinternals.h"
#include "gdkdisplayprivate.h"
#include "gdkdragprivate.h"
#include "gdkdropprivate.h"
#include "gdkkeysprivate.h"
#include "gdk-private.h"
#include <gobject/gvaluecollector.h>
#include <string.h>
#include <math.h>
/**
* SECTION:events
* @Short_description: Functions for handling events from the window system
* @Title: Events
*
* This section describes functions dealing with events from the window
* system.
*
* In GTK applications the events are handled automatically by toplevel
* widgets and passed on to the event controllers of appropriate widgets,
* so these functions are rarely needed.
*/
/**
* GdkEvent: (ref-func gdk_event_ref) (unref-func gdk_event_unref)
*
* The GdkEvent struct contains only private fields and
* should not be accessed directly.
*/
/**
* GdkEventSequence:
*
* GdkEventSequence is an opaque type representing a sequence
* of related touch events.
*/
static void
value_event_init (GValue *value)
{
value->data[0].v_pointer = NULL;
}
static void
value_event_free_value (GValue *value)
{
if (value->data[0].v_pointer != NULL)
gdk_event_unref (value->data[0].v_pointer);
}
static void
value_event_copy_value (const GValue *src,
GValue *dst)
{
if (src->data[0].v_pointer != NULL)
dst->data[0].v_pointer = gdk_event_ref (src->data[0].v_pointer);
else
dst->data[0].v_pointer = NULL;
}
static gpointer
value_event_peek_pointer (const GValue *value)
{
return value->data[0].v_pointer;
}
static char *
value_event_collect_value (GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags)
{
GdkEvent *event = collect_values[0].v_pointer;
if (event == NULL)
{
value->data[0].v_pointer = NULL;
return NULL;
}
if (event->parent_instance.g_class == NULL)
return g_strconcat ("invalid unclassed GdkEvent pointer for "
"value type '",
G_VALUE_TYPE_NAME (value),
"'",
NULL);
value->data[0].v_pointer = gdk_event_ref (event);
return NULL;
}
static gchar *
value_event_lcopy_value (const GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags)
{
GdkEvent **event_p = collect_values[0].v_pointer;
if (event_p == NULL)
return g_strconcat ("value location for '",
G_VALUE_TYPE_NAME (value),
"' passed as NULL",
NULL);
if (value->data[0].v_pointer == NULL)
*event_p = NULL;
else if (collect_flags & G_VALUE_NOCOPY_CONTENTS)
*event_p = value->data[0].v_pointer;
else
*event_p = gdk_event_ref (value->data[0].v_pointer);
return NULL;
}
static void
gdk_event_finalize (GdkEvent *self)
{
GdkDisplay *display = gdk_event_get_display (self);
if (display != NULL)
_gdk_display_event_data_free (display, self);
g_clear_object (&self->surface);
g_clear_object (&self->device);
g_clear_object (&self->source_device);
g_type_free_instance ((GTypeInstance *) self);
}
static GdkModifierType
gdk_event_real_get_state (GdkEvent *self)
{
return 0;
}
static gboolean
gdk_event_real_get_position (GdkEvent *self,
double *x,
double *y)
{
*x = NAN;
*y = NAN;
return FALSE;
}
static GdkEventSequence *
gdk_event_real_get_sequence (GdkEvent *self)
{
return NULL;
}
static GdkDeviceTool *
gdk_event_real_get_tool (GdkEvent *self)
{
return NULL;
}
static gboolean
gdk_event_real_get_axes (GdkEvent *self,
double **axes,
guint *n_axes)
{
return FALSE;
}
static void
gdk_event_class_init (GdkEventClass *klass)
{
klass->finalize = gdk_event_finalize;
klass->get_state = gdk_event_real_get_state;
klass->get_position = gdk_event_real_get_position;
klass->get_sequence = gdk_event_real_get_sequence;
klass->get_tool = gdk_event_real_get_tool;
klass->get_axes = gdk_event_real_get_axes;
}
static void
gdk_event_init (GdkEvent *self)
{
g_ref_count_init (&self->ref_count);
}
GType
gdk_event_get_type (void)
{
static volatile gsize event_type__volatile;
if (g_once_init_enter (&event_type__volatile))
{
static const GTypeFundamentalInfo finfo = {
(G_TYPE_FLAG_CLASSED |
G_TYPE_FLAG_INSTANTIATABLE |
G_TYPE_FLAG_DERIVABLE |
G_TYPE_FLAG_DEEP_DERIVABLE),
};
static const GTypeValueTable value_table = {
value_event_init,
value_event_free_value,
value_event_copy_value,
value_event_peek_pointer,
"p",
value_event_collect_value,
"p",
value_event_lcopy_value,
};
const GTypeInfo event_info = {
/* Class */
sizeof (GdkEventClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gdk_event_class_init,
(GClassFinalizeFunc) NULL,
NULL,
/* Instance */
sizeof (GdkEvent),
0,
(GInstanceInitFunc) gdk_event_init,
/* GValue */
&value_table,
};
GType event_type =
g_type_register_fundamental (g_type_fundamental_next (),
g_intern_static_string ("GdkEvent"),
&event_info, &finfo,
G_TYPE_FLAG_ABSTRACT);
g_once_init_leave (&event_type__volatile, event_type);
}
return event_type__volatile;
}
/*< private >
* GdkEventTypeInfo:
* @instance_size: the size of the instance of a GdkEvent subclass
* @instance_init: (nullable): the function to initialize the instance data
* @finalize: (nullable): the function to free the instance data
* @get_state: (nullable): the function to retrieve the #GdkModifierType
* associated to the event
* @get_position: (nullable): the function to retrieve the event coordinates
* @get_sequence: (nullable): the function to retrieve the event sequence
* @get_tool: (nullable): the function to retrieve the event's device tool
* @get_axes: (nullable): the function to retrieve the event's axes
*
* A structure used when registering a new GdkEvent type.
*/
typedef struct {
gsize instance_size;
void (* instance_init) (GdkEvent *event);
void (* finalize) (GdkEvent *event);
GdkModifierType (* get_state) (GdkEvent *event);
gboolean (* get_position) (GdkEvent *event,
double *x,
double *y);
GdkEventSequence *(* get_sequence) (GdkEvent *event);
GdkDeviceTool *(* get_tool) (GdkEvent *event);
gboolean (* get_axes) (GdkEvent *event,
double **axes,
guint *n_axes);
} GdkEventTypeInfo;
static void
gdk_event_generic_class_init (gpointer g_class,
gpointer class_data)
{
GdkEventTypeInfo *info = class_data;
GdkEventClass *event_class = g_class;
/* Optional */
if (info->finalize != NULL)
event_class->finalize = info->finalize;
if (info->get_state != NULL)
event_class->get_state = info->get_state;
if (info->get_position != NULL)
event_class->get_position = info->get_position;
if (info->get_sequence != NULL)
event_class->get_sequence = info->get_sequence;
if (info->get_tool != NULL)
event_class->get_tool = info->get_tool;
if (info->get_axes != NULL)
event_class->get_axes = info->get_axes;
g_free (info);
}
static GType
gdk_event_type_register_static (const char *type_name,
const GdkEventTypeInfo *type_info)
{
GTypeInfo info;
info.class_size = sizeof (GdkEventClass);
info.base_init = NULL;
info.base_finalize = NULL;
info.class_init = gdk_event_generic_class_init;
info.class_finalize = NULL;
info.class_data = g_memdup (type_info, sizeof (GdkEventTypeInfo));
info.instance_size = type_info->instance_size;
info.n_preallocs = 0;
info.instance_init = (GInstanceInitFunc) type_info->instance_init;
info.value_table = NULL;
return g_type_register_static (GDK_TYPE_EVENT, type_name, &info, 0);
}
/* Map GdkEventType to the appropriate GType */
static GType gdk_event_types[GDK_EVENT_LAST];
/*< private >
* GDK_EVENT_TYPE_SLOT:
* @ETYPE: a #GdkEventType
*
* Associates a #GdkEvent type with the given #GdkEventType enumeration.
*
* This macro can only be used with %GDK_DEFINE_EVENT_TYPE.
*/
#define GDK_EVENT_TYPE_SLOT(ETYPE) { gdk_event_types[ETYPE] = gdk_define_event_type_id; }
/*< private >
* GDK_DEFINE_EVENT_TYPE:
* @TypeName: the type name, in camel case
* @type_name: the type name, in snake case
* @type_info: the address of the #GdkEventTypeInfo for the event type
* @_C_: custom code to call after registering the event type
*
* Registers a new #GdkEvent subclass with the given @TypeName and @type_info.
*
* Similarly to %G_DEFINE_TYPE_WITH_CODE, this macro will generate a `get_type()`
* function that registers the event type.
*
* You can specify code to be run after the type registration; the #GType of
* the event is available in the `gdk_define_event_type_id` variable.
*/
#define GDK_DEFINE_EVENT_TYPE(TypeName, type_name, type_info, _C_) \
GType \
type_name ## _get_type (void) \
{ \
static volatile gsize gdk_define_event_type_id__volatile; \
if (g_once_init_enter (&gdk_define_event_type_id__volatile)) \
{ \
GType gdk_define_event_type_id = \
gdk_event_type_register_static (g_intern_static_string (#TypeName), type_info); \
{ _C_ } \
g_once_init_leave (&gdk_define_event_type_id__volatile, gdk_define_event_type_id); \
} \
return gdk_define_event_type_id__volatile; \
}
#define GDK_EVENT_SUPER(event) \
((GdkEventClass *) g_type_class_peek (g_type_parent (G_TYPE_FROM_INSTANCE (event))))
/*< private >
* gdk_event_alloc:
* @event_type: the #GdkEventType to allocate
* @surface: (nullable): the #GdkSurface of the event
* @device: (nullable): the #GdkDevice of the event
* @source_device: (nullable): the source #GdkDevice of the event
* @time_: the event serial
*
* Allocates a #GdkEvent for the given @event_type, and sets its
* common fields with the given parameters.
*
* Returns: (transfer full): the newly allocated #GdkEvent instance
*/
static gpointer
gdk_event_alloc (GdkEventType event_type,
GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time_)
{
g_assert (event_type >= GDK_DELETE && event_type < GDK_EVENT_LAST);
g_assert (gdk_event_types[event_type] != G_TYPE_INVALID);
GdkEvent *event = (GdkEvent *) g_type_create_instance (gdk_event_types[event_type]);
GDK_NOTE (EVENTS, {
char *str = g_enum_to_string (GDK_TYPE_EVENT_TYPE, event_type);
g_message ("Allocating a new %s for event type %s",
g_type_name (gdk_event_types[event_type]), str);
g_free (str);
});
event->event_type = event_type;
event->surface = surface != NULL ? g_object_ref (surface) : NULL;
event->device = device != NULL ? g_object_ref (device) : NULL;
event->source_device = source_device != NULL ? g_object_ref (source_device) : NULL;
event->time = time_;
return event;
}
static void
gdk_event_init_types_once (void)
{
g_type_ensure (GDK_TYPE_BUTTON_EVENT);
g_type_ensure (GDK_TYPE_CONFIGURE_EVENT);
g_type_ensure (GDK_TYPE_CROSSING_EVENT);
g_type_ensure (GDK_TYPE_DELETE_EVENT);
g_type_ensure (GDK_TYPE_DND_EVENT);
g_type_ensure (GDK_TYPE_FOCUS_EVENT);
g_type_ensure (GDK_TYPE_GRAB_BROKEN_EVENT);
g_type_ensure (GDK_TYPE_KEY_EVENT);
g_type_ensure (GDK_TYPE_MOTION_EVENT);
g_type_ensure (GDK_TYPE_PAD_EVENT);
g_type_ensure (GDK_TYPE_PROXIMITY_EVENT);
g_type_ensure (GDK_TYPE_SCROLL_EVENT);
g_type_ensure (GDK_TYPE_TOUCH_EVENT);
g_type_ensure (GDK_TYPE_TOUCHPAD_EVENT);
}
/*< private >
* gdk_event_init_types:
*
* Initializes all GdkEvent types.
*/
void
gdk_event_init_types (void)
{
static volatile gsize event_types__volatile;
if (g_once_init_enter (&event_types__volatile))
{
gboolean initialized = FALSE;
gdk_event_init_types_once ();
initialized = TRUE;
g_once_init_leave (&event_types__volatile, initialized);
}
}
#ifdef G_ENABLE_DEBUG
static gboolean
check_event_sanity (GdkEvent *event)
{
if (event->device != NULL &&
gdk_surface_get_display (event->surface) != gdk_device_get_display (event->device))
{
char *type = g_enum_to_string (GDK_TYPE_EVENT_TYPE, event->event_type);
g_warning ("Event of type %s with mismatched device display", type);
g_free (type);
return FALSE;
}
if (event->source_device != NULL &&
gdk_surface_get_display (event->surface) != gdk_device_get_display (event->source_device))
{
char *type = g_enum_to_string (GDK_TYPE_EVENT_TYPE, event->event_type);
g_warning ("Event of type %s with mismatched source device display", type);
g_free (type);
return FALSE;
}
return TRUE;
}
#endif
void
_gdk_event_emit (GdkEvent *event)
{
#ifdef G_ENABLE_DEBUG
if (!check_event_sanity (event))
return;
#endif
if (gdk_drag_handle_source_event (event))
return;
gdk_surface_handle_event (event);
}
/*********************************************
* Functions for maintaining the event queue *
*********************************************/
/**
* _gdk_event_queue_find_first:
* @display: a #GdkDisplay
*
* Find the first event on the queue that is not still
* being filled in.
*
* Returns: (nullable): Pointer to the list node for that event, or
* %NULL.
**/
GList*
_gdk_event_queue_find_first (GdkDisplay *display)
{
GList *tmp_list;
GList *pending_motion = NULL;
gboolean paused = display->event_pause_count > 0;
tmp_list = g_queue_peek_head_link (&display->queued_events);
while (tmp_list)
{
GdkEvent *event = tmp_list->data;
if ((event->flags & GDK_EVENT_PENDING) == 0 &&
(!paused || (event->flags & GDK_EVENT_FLUSHED) != 0))
{
if (pending_motion)
return pending_motion;
if (event->event_type == GDK_MOTION_NOTIFY && (event->flags & GDK_EVENT_FLUSHED) == 0)
pending_motion = tmp_list;
else
return tmp_list;
}
tmp_list = tmp_list->next;
}
return NULL;
}
/**
* _gdk_event_queue_append:
* @display: a #GdkDisplay
* @event: Event to append.
*
* Appends an event onto the tail of the event queue.
*
* Returns: the newly appended list node.
**/
GList *
_gdk_event_queue_append (GdkDisplay *display,
GdkEvent *event)
{
g_queue_push_tail (&display->queued_events, event);
return g_queue_peek_tail_link (&display->queued_events);
}
/**
* _gdk_event_queue_insert_after:
* @display: a #GdkDisplay
* @sibling: Append after this event.
* @event: Event to append.
*
* Appends an event after the specified event, or if it isn’t in
* the queue, onto the tail of the event queue.
*/
void
_gdk_event_queue_insert_after (GdkDisplay *display,
GdkEvent *sibling,
GdkEvent *event)
{
GList *prev = g_queue_find (&display->queued_events, sibling);
if (prev)
g_queue_insert_after (&display->queued_events, prev, event);
else
g_queue_push_tail (&display->queued_events, event);
}
/**
* _gdk_event_queue_insert_before:
* @display: a #GdkDisplay
* @sibling: Append before this event
* @event: Event to prepend
*
* Prepends an event before the specified event, or if it isn’t in
* the queue, onto the head of the event queue.
*
* Returns: the newly prepended list node.
*/
void
_gdk_event_queue_insert_before (GdkDisplay *display,
GdkEvent *sibling,
GdkEvent *event)
{
GList *next = g_queue_find (&display->queued_events, sibling);
if (next)
g_queue_insert_before (&display->queued_events, next, event);
else
g_queue_push_head (&display->queued_events, event);
}
/**
* _gdk_event_queue_remove_link:
* @display: a #GdkDisplay
* @node: node to remove
*
* Removes a specified list node from the event queue.
**/
void
_gdk_event_queue_remove_link (GdkDisplay *display,
GList *node)
{
g_queue_unlink (&display->queued_events, node);
}
/**
* _gdk_event_unqueue:
* @display: a #GdkDisplay
*
* Removes and returns the first event from the event
* queue that is not still being filled in.
*
* Returns: (nullable): the event, or %NULL. Ownership is transferred
* to the caller.
**/
GdkEvent*
_gdk_event_unqueue (GdkDisplay *display)
{
GdkEvent *event = NULL;
GList *tmp_list;
tmp_list = _gdk_event_queue_find_first (display);
if (tmp_list)
{
event = tmp_list->data;
_gdk_event_queue_remove_link (display, tmp_list);
g_list_free_1 (tmp_list);
}
return event;
}
static void
gdk_motion_event_push_history (GdkEvent *event,
GdkEvent *history_event)
{
GdkMotionEvent *self = (GdkMotionEvent *) event;
GdkTimeCoord *hist;
GdkDevice *device;
gint i, n_axes;
g_assert (GDK_IS_EVENT_TYPE (event, GDK_MOTION_NOTIFY));
g_assert (GDK_IS_EVENT_TYPE (history_event, GDK_MOTION_NOTIFY));
hist = g_new0 (GdkTimeCoord, 1);
device = gdk_event_get_device (history_event);
n_axes = gdk_device_get_n_axes (device);
for (i = 0; i <= MIN (n_axes, GDK_MAX_TIMECOORD_AXES); i++)
gdk_event_get_axis (history_event, i, &hist->axes[i]);
self->history = g_list_prepend (self->history, hist);
}
void
_gdk_event_queue_handle_motion_compression (GdkDisplay *display)
{
GList *tmp_list;
GList *pending_motions = NULL;
GdkSurface *pending_motion_surface = NULL;
GdkDevice *pending_motion_device = NULL;
GdkEvent *last_motion = NULL;
/* If the last N events in the event queue are motion notify
* events for the same surface, drop all but the last */
tmp_list = g_queue_peek_tail_link (&display->queued_events);
while (tmp_list)
{
GdkEvent *event = tmp_list->data;
if (event->flags & GDK_EVENT_PENDING)
break;
if (event->event_type != GDK_MOTION_NOTIFY)
break;
if (pending_motion_surface != NULL &&
pending_motion_surface != event->surface)
break;
if (pending_motion_device != NULL &&
pending_motion_device != event->device)
break;
if (!last_motion)
last_motion = event;
pending_motion_surface = event->surface;
pending_motion_device = event->device;
pending_motions = tmp_list;
tmp_list = tmp_list->prev;
}
while (pending_motions && pending_motions->next != NULL)
{
GList *next = pending_motions->next;
if (last_motion != NULL)
{
GdkModifierType state = gdk_event_get_modifier_state (last_motion);
if (state &
(GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK |
GDK_BUTTON4_MASK | GDK_BUTTON5_MASK))
gdk_motion_event_push_history (last_motion, pending_motions->data);
}
gdk_event_unref (pending_motions->data);
g_queue_delete_link (&display->queued_events, pending_motions);
pending_motions = next;
}
if (g_queue_get_length (&display->queued_events) == 1 &&
g_queue_peek_head_link (&display->queued_events) == pending_motions)
{
GdkFrameClock *clock = gdk_surface_get_frame_clock (pending_motion_surface);
if (clock) /* might be NULL if surface was destroyed */
gdk_frame_clock_request_phase (clock, GDK_FRAME_CLOCK_PHASE_FLUSH_EVENTS);
}
}
void
_gdk_event_queue_flush (GdkDisplay *display)
{
GList *tmp_list;
for (tmp_list = display->queued_events.head; tmp_list; tmp_list = tmp_list->next)
{
GdkEvent *event = tmp_list->data;
event->flags |= GDK_EVENT_FLUSHED;
}
}
/**
* gdk_event_ref:
* @event: a #GdkEvent
*
* Increase the ref count of @event.
*
* Returns: (transfer full): @event
*/
GdkEvent *
gdk_event_ref (GdkEvent *event)
{
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
g_ref_count_inc (&event->ref_count);
return event;
}
/**
* gdk_event_unref:
* @event: (transfer full): a #GdkEvent
*
* Decrease the ref count of @event, and free it
* if the last reference is dropped.
*/
void
gdk_event_unref (GdkEvent *event)
{
g_return_if_fail (GDK_IS_EVENT (event));
if (g_ref_count_dec (&event->ref_count))
GDK_EVENT_GET_CLASS (event)->finalize (event);
}
/**
* gdk_event_get_pointer_emulated:
* @event: a #GdkEvent
*
* Returns whether this event is an 'emulated' pointer event (typically
* from a touch event), as opposed to a real one.
*
* Returns: %TRUE if this event is emulated
*/
gboolean
gdk_event_get_pointer_emulated (GdkEvent *event)
{
switch ((int) event->event_type)
{
case GDK_TOUCH_BEGIN:
case GDK_TOUCH_END:
case GDK_TOUCH_UPDATE:
case GDK_TOUCH_CANCEL:
{
GdkTouchEvent *tevent = (GdkTouchEvent *) event;
return tevent->pointer_emulated;
}
case GDK_SCROLL:
case GDK_SCROLL_SMOOTH:
{
GdkScrollEvent *sevent = (GdkScrollEvent *) event;
return sevent->pointer_emulated;
}
default:
break;
}
return FALSE;
}
/**
* gdk_event_get_axis:
* @event: a #GdkEvent
* @axis_use: the axis use to look for
* @value: (out): location to store the value found
*
* Extract the axis value for a particular axis use from
* an event structure.
*
* Returns: %TRUE if the specified axis was found, otherwise %FALSE
**/
gboolean
gdk_event_get_axis (GdkEvent *event,
GdkAxisUse axis_use,
double *value)
{
double *axes;
guint n_axes;
g_return_val_if_fail (GDK_IS_EVENT (event), FALSE);
if (axis_use == GDK_AXIS_X || axis_use == GDK_AXIS_Y)
{
double x, y;
if (!gdk_event_get_position (event, &x, &y))
return FALSE;
if (axis_use == GDK_AXIS_X && value != NULL)
*value = x;
if (axis_use == GDK_AXIS_Y && value != NULL)
*value = y;
return TRUE;
}
if (!gdk_event_get_axes (event, &axes, &n_axes))
return FALSE;
if (axis_use >= gdk_device_get_n_axes (event->device))
return FALSE;
return gdk_device_get_axis (event->device, axes, axis_use, value);
}
/**
* gdk_event_triggers_context_menu:
* @event: a #GdkEvent, currently only button events are meaningful values
*
* This function returns whether a #GdkEventButton should trigger a
* context menu, according to platform conventions. The right mouse
* button always triggers context menus.
*
* This function should always be used instead of simply checking for
* event->button == %GDK_BUTTON_SECONDARY.
*
* Returns: %TRUE if the event should trigger a context menu.
**/
gboolean
gdk_event_triggers_context_menu (GdkEvent *event)
{
g_return_val_if_fail (event != NULL, FALSE);
if (event->event_type == GDK_BUTTON_PRESS)
{
GdkButtonEvent *bevent = (GdkButtonEvent *) event;
g_return_val_if_fail (GDK_IS_SURFACE (event->surface), FALSE);
if (bevent->button == GDK_BUTTON_SECONDARY &&
! (bevent->state & (GDK_BUTTON1_MASK | GDK_BUTTON2_MASK)))
return TRUE;
}
return FALSE;
}
static gboolean
gdk_events_get_axis_distances (GdkEvent *event1,
GdkEvent *event2,
gdouble *x_distance,
gdouble *y_distance,
gdouble *distance)
{
gdouble x1, x2, y1, y2;
gdouble xd, yd;
if (!gdk_event_get_position (event1, &x1, &y1) ||
!gdk_event_get_position (event2, &x2, &y2))
return FALSE;
xd = x2 - x1;
yd = y2 - y1;
if (x_distance)
*x_distance = xd;
if (y_distance)
*y_distance = yd;
if (distance)
*distance = sqrt ((xd * xd) + (yd * yd));
return TRUE;
}
/**
* gdk_events_get_distance:
* @event1: first #GdkEvent
* @event2: second #GdkEvent
* @distance: (out): return location for the distance
*
* If both events have X/Y information, the distance between both coordinates
* (as in a straight line going from @event1 to @event2) will be returned.
*
* Returns: %TRUE if the distance could be calculated.
**/
gboolean
gdk_events_get_distance (GdkEvent *event1,
GdkEvent *event2,
gdouble *distance)
{
return gdk_events_get_axis_distances (event1, event2,
NULL, NULL,
distance);
}
/**
* gdk_events_get_angle:
* @event1: first #GdkEvent
* @event2: second #GdkEvent
* @angle: (out): return location for the relative angle between both events
*
* If both events contain X/Y information, this function will return %TRUE
* and return in @angle the relative angle from @event1 to @event2. The rotation
* direction for positive angles is from the positive X axis towards the positive
* Y axis.
*
* Returns: %TRUE if the angle could be calculated.
**/
gboolean
gdk_events_get_angle (GdkEvent *event1,
GdkEvent *event2,
gdouble *angle)
{
gdouble x_distance, y_distance, distance;
if (!gdk_events_get_axis_distances (event1, event2,
&x_distance, &y_distance,
&distance))
return FALSE;
if (angle)
{
*angle = atan2 (x_distance, y_distance);
/* Invert angle */
*angle = (2 * G_PI) - *angle;
/* Shift it 90° */
*angle += G_PI / 2;
/* And constraint it to 0°-360° */
*angle = fmod (*angle, 2 * G_PI);
}
return TRUE;
}
/**
* gdk_events_get_center:
* @event1: first #GdkEvent
* @event2: second #GdkEvent
* @x: (out): return location for the X coordinate of the center
* @y: (out): return location for the Y coordinate of the center
*
* If both events contain X/Y information, the center of both coordinates
* will be returned in @x and @y.
*
* Returns: %TRUE if the center could be calculated.
**/
gboolean
gdk_events_get_center (GdkEvent *event1,
GdkEvent *event2,
gdouble *x,
gdouble *y)
{
gdouble x1, x2, y1, y2;
if (!gdk_event_get_position (event1, &x1, &y1) ||
!gdk_event_get_position (event2, &x2, &y2))
return FALSE;
if (x)
*x = (x2 + x1) / 2;
if (y)
*y = (y2 + y1) / 2;
return TRUE;
}
static GdkEventSequence *
gdk_event_sequence_copy (GdkEventSequence *sequence)
{
return sequence;
}
static void
gdk_event_sequence_free (GdkEventSequence *sequence)
{
/* Nothing to free here */
}
G_DEFINE_BOXED_TYPE (GdkEventSequence, gdk_event_sequence,
gdk_event_sequence_copy,
gdk_event_sequence_free)
/**
* gdk_event_get_axes:
* @event: a #GdkEvent
* @axes: (transfer none) (out) (array length=n_axes): the array of values for all axes
* @n_axes: (out): the length of array
*
* Extracts all axis values from an event.
*
* Returns: %TRUE on success, otherwise %FALSE
**/
gboolean
gdk_event_get_axes (GdkEvent *event,
double **axes,
guint *n_axes)
{
g_return_val_if_fail (GDK_IS_EVENT (event), FALSE);
return GDK_EVENT_GET_CLASS (event)->get_axes (event, axes, n_axes);
}
/**
* gdk_event_get_event_type:
* @event: a #GdkEvent
*
* Retrieves the type of the event.
*
* Returns: a #GdkEventType
*/
GdkEventType
gdk_event_get_event_type (GdkEvent *event)
{
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
return event->event_type;
}
/**
* gdk_event_get_surface:
* @event: a #GdkEvent
*
* Extracts the #GdkSurface associated with an event.
*
* Returns: (transfer none): The #GdkSurface associated with the event
*/
GdkSurface *
gdk_event_get_surface (GdkEvent *event)
{
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
return event->surface;
}
/**
* gdk_event_get_device:
* @event: a #GdkEvent.
*
* Returns the device of an event.
*
* Returns: (nullable) (transfer none): a #GdkDevice.
*/
GdkDevice *
gdk_event_get_device (GdkEvent *event)
{
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
return event->device;
}
/**
* gdk_event_get_source_device:
* @event: a #GdkEvent
*
* This function returns the hardware (slave) #GdkDevice that has
* triggered the event, falling back to the virtual (master) device
* (as in gdk_event_get_device()) if the event wasn’t caused by
* interaction with a hardware device. This may happen for example
* in synthesized crossing events after a #GdkSurface updates its
* geometry or a grab is acquired/released.
*
* If the event does not contain a device field, this function will
* return %NULL.
*
* Returns: (nullable) (transfer none): a #GdkDevice, or %NULL.
**/
GdkDevice *
gdk_event_get_source_device (GdkEvent *event)
{
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
if (event->source_device)
return event->source_device;
return event->device;
}
/**
* gdk_event_get_device_tool:
* @event: a #GdkEvent
*
* If the event was generated by a device that supports
* different tools (eg. a tablet), this function will
* return a #GdkDeviceTool representing the tool that
* caused the event. Otherwise, %NULL will be returned.
*
* Note: the #GdkDeviceTools will be constant during
* the application lifetime, if settings must be stored
* persistently across runs, see gdk_device_tool_get_serial()
*
* Returns: (transfer none) (nullable): The current device tool, or %NULL
**/
GdkDeviceTool *
gdk_event_get_device_tool (GdkEvent *event)
{
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
return GDK_EVENT_GET_CLASS (event)->get_tool (event);
}
/**
* gdk_event_get_time:
* @event: a #GdkEvent
*
* Returns the time stamp from @event, if there is one; otherwise
* returns #GDK_CURRENT_TIME.
*
* Returns: time stamp field from @event
**/
guint32
gdk_event_get_time (GdkEvent *event)
{
g_return_val_if_fail (GDK_IS_EVENT (event), GDK_CURRENT_TIME);
return event->time;
}
/**
* gdk_event_get_display:
* @event: a #GdkEvent
*
* Retrieves the #GdkDisplay associated to the @event.
*
* Returns: (transfer none) (nullable): a #GdkDisplay
*/
GdkDisplay *
gdk_event_get_display (GdkEvent *event)
{
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
if (event->surface)
return gdk_surface_get_display (event->surface);
return NULL;
}
/**
* gdk_event_get_event_sequence:
* @event: a #GdkEvent
*
* If @event is a touch event, returns the #GdkEventSequence
* to which the event belongs. Otherwise, return %NULL.
*
* Returns: (transfer none): the event sequence that the event belongs to
*/
GdkEventSequence *
gdk_event_get_event_sequence (GdkEvent *event)
{
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
return GDK_EVENT_GET_CLASS (event)->get_sequence (event);
}
/**
* gdk_event_get_modifier_state:
* @event: a #GdkEvent
*
* Returns the modifier state field of an event.
*
* Returns: the modifier state of @event
**/
GdkModifierType
gdk_event_get_modifier_state (GdkEvent *event)
{
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
return GDK_EVENT_GET_CLASS (event)->get_state (event);
}
/**
* gdk_event_get_position:
* @event: a #GdkEvent
* @x: (out): location to put event surface x coordinate
* @y: (out): location to put event surface y coordinate
*
* Extract the event surface relative x/y coordinates from an event.
**/
gboolean
gdk_event_get_position (GdkEvent *event,
double *x,
double *y)
{
g_return_val_if_fail (GDK_IS_EVENT (event), FALSE);
return GDK_EVENT_GET_CLASS (event)->get_position (event, x, y);
}
/* {{{ GdkButtonEvent */
static void
gdk_button_event_finalize (GdkEvent *event)
{
GdkButtonEvent *self = (GdkButtonEvent *) event;
g_clear_object (&self->tool);
g_clear_pointer (&self->axes, g_free);
GDK_EVENT_SUPER (event)->finalize (event);
}
static GdkModifierType
gdk_button_event_get_state (GdkEvent *event)
{
GdkButtonEvent *self = (GdkButtonEvent *) event;
return self->state;
}
static gboolean
gdk_button_event_get_position (GdkEvent *event,
double *x,
double *y)
{
GdkButtonEvent *self = (GdkButtonEvent *) event;
*x = self->x;
*y = self->y;
return TRUE;
}
static GdkDeviceTool *
gdk_button_event_get_tool (GdkEvent *event)
{
GdkButtonEvent *self = (GdkButtonEvent *) event;
return self->tool;
}
static gboolean
gdk_button_event_get_axes (GdkEvent *event,
double **axes,
guint *n_axes)
{
GdkButtonEvent *self = (GdkButtonEvent *) event;
GdkDevice *source_device = gdk_event_get_source_device (event);
if (source_device == NULL)
return FALSE;
*axes = self->axes;
*n_axes = gdk_device_get_n_axes (source_device);
return TRUE;
}
static const GdkEventTypeInfo gdk_button_event_info = {
sizeof (GdkButtonEvent),
NULL,
gdk_button_event_finalize,
gdk_button_event_get_state,
gdk_button_event_get_position,
NULL,
gdk_button_event_get_tool,
gdk_button_event_get_axes,
};
GDK_DEFINE_EVENT_TYPE (GdkButtonEvent, gdk_button_event,
&gdk_button_event_info,
GDK_EVENT_TYPE_SLOT (GDK_BUTTON_PRESS)
GDK_EVENT_TYPE_SLOT (GDK_BUTTON_RELEASE))
GdkEvent *
gdk_button_event_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
guint button,
double x,
double y,
double *axes)
{
g_return_val_if_fail (type == GDK_BUTTON_PRESS ||
type == GDK_BUTTON_RELEASE, NULL);
GdkButtonEvent *self = gdk_event_alloc (type, surface, device, source_device, time);
self->tool = tool != NULL ? g_object_ref (tool) : NULL;
self->axes = axes;
self->state = state;
self->button = button;
self->x = x;
self->y = y;
return (GdkEvent *) self;
}
/**
* gdk_button_event_get_button:
* @event: (type GdkButtonEvent): a button event
*
* Extract the button number from a button event.
*
* Returns: the button of @event
**/
guint
gdk_button_event_get_button (GdkEvent *event)
{
GdkButtonEvent *self = (GdkButtonEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_BUTTON_PRESS) ||
GDK_IS_EVENT_TYPE (event, GDK_BUTTON_RELEASE), 0);
return self->button;
}
/* }}} */
/* {{{ GdkKeyEvent */
static GdkModifierType
gdk_key_event_get_state (GdkEvent *event)
{
GdkKeyEvent *self = (GdkKeyEvent *) event;
return self->state;
}
static const GdkEventTypeInfo gdk_key_event_info = {
sizeof (GdkKeyEvent),
NULL,
NULL,
gdk_key_event_get_state,
NULL,
NULL,
NULL,
NULL,
};
GDK_DEFINE_EVENT_TYPE (GdkKeyEvent, gdk_key_event,
&gdk_key_event_info,
GDK_EVENT_TYPE_SLOT (GDK_KEY_PRESS)
GDK_EVENT_TYPE_SLOT (GDK_KEY_RELEASE))
/*< private >
* gdk_key_event_new:
* @type: the event type, either %GDK_KEY_PRESS or %GDK_KEY_RELEASE
* @surface: the #GdkSurface of the event
* @device: the #GdkDevice related to the event
* @source_device: the source #GdkDevice related to the event
* @time: the event's timestamp
* @keycode: the keycode of the event
* @state: the modifiers state
* @is_modifier: whether the event is a modifiers only event
* @translated: the translated key data for the given @state
* @no_lock: the translated key data without the given @state
*
* Creates a new #GdkKeyEvent.
*
* Returns: (transfer full) (type GdkKeyEvent): the newly created #GdkEvent
*/
GdkEvent *
gdk_key_event_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
guint keycode,
GdkModifierType state,
gboolean is_modifier,
GdkTranslatedKey *translated,
GdkTranslatedKey *no_lock)
{
g_return_val_if_fail (type == GDK_KEY_PRESS ||
type == GDK_KEY_RELEASE, NULL);
GdkKeyEvent *self = gdk_event_alloc (type, surface, device, source_device, time);
GdkEvent *event = (GdkEvent *) self;
self->keycode = keycode;
self->state = state;
self->key_is_modifier = is_modifier;
self->translated[0] = *translated;
self->translated[1] = *no_lock;
return event;
}
/**
* gdk_key_event_get_keyval:
* @event: (type GdkKeyEvent): a key event
*
* Extracts the keyval from a key event.
*
* Returns: the keyval of @event
*/
guint
gdk_key_event_get_keyval (GdkEvent *event)
{
GdkKeyEvent *self = (GdkKeyEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_KEY_PRESS) ||
GDK_IS_EVENT_TYPE (event, GDK_KEY_RELEASE), 0);
return self->translated[0].keyval;
}
/**
* gdk_key_event_get_keycode:
* @event: (type GdkKeyEvent): a key event
*
* Extracts the keycode from a key event.
*
* Returns: the keycode of @event
*/
guint
gdk_key_event_get_keycode (GdkEvent *event)
{
GdkKeyEvent *self = (GdkKeyEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_KEY_PRESS) ||
GDK_IS_EVENT_TYPE (event, GDK_KEY_RELEASE), 0);
return self->keycode;
}
/**
* gdk_key_event_get_level:
* @event: (type GdkKeyEvent): a key event
*
* Extracts the shift level from a key event.
*
* Returns: the shift level of @event
*/
guint
gdk_key_event_get_level (GdkEvent *event)
{
GdkKeyEvent *self = (GdkKeyEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_KEY_PRESS) ||
GDK_IS_EVENT_TYPE (event, GDK_KEY_RELEASE), 0);
return self->translated[0].level;
}
/**
* gdk_key_event_get_layout:
* @event: (type GdkKeyEvent): a key event
*
* Extracts the layout from a key event.
*
* Returns: the layout of @event
*/
guint
gdk_key_event_get_layout (GdkEvent *event)
{
GdkKeyEvent *self = (GdkKeyEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_KEY_PRESS) ||
GDK_IS_EVENT_TYPE (event, GDK_KEY_RELEASE), 0);
return self->translated[0].layout;
}
/**
* gdk_key_event_get_consumed_modifiers:
* @event: (type GdkKeyEvent): a key event
*
* Extracts the consumed modifiers from a key event.
*
* Returns: the consumed modifiers or @event
*/
GdkModifierType
gdk_key_event_get_consumed_modifiers (GdkEvent *event)
{
GdkKeyEvent *self = (GdkKeyEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_KEY_PRESS) ||
GDK_IS_EVENT_TYPE (event, GDK_KEY_RELEASE), 0);
return self->translated[0].consumed;
}
/**
* gdk_key_event_is_modifier:
* @event: (type GdkKeyEvent): a key event
*
* Extracts whether the key event is for a modifier key.
*
* Returns: %TRUE if the @event is for a modifier key
*/
gboolean
gdk_key_event_is_modifier (GdkEvent *event)
{
GdkKeyEvent *self = (GdkKeyEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_KEY_PRESS) ||
GDK_IS_EVENT_TYPE (event, GDK_KEY_RELEASE), FALSE);
return self->key_is_modifier;
}
/**
* gdk_key_event_matches:
* @event: (type GdkKeyEvent): a key #GdkEvent
* @keyval: the keyval to match
* @modifiers: the modifiers to match
*
* Matches a key event against a keyboard shortcut that is specified
* as a keyval and modifiers. Partial matches are possible where the
* combination matches if the currently active group is ignored.
*
* Note that we ignore Caps Lock for matching.
*
* Returns: a GdkKeyMatch value describing whether @event matches
*/
GdkKeyMatch
gdk_key_event_matches (GdkEvent *event,
guint keyval,
GdkModifierType modifiers)
{
GdkKeyEvent *self = (GdkKeyEvent *) event;
guint keycode;
GdkModifierType state;
guint ev_keyval;
int layout;
int level;
GdkModifierType consumed_modifiers;
GdkModifierType shift_group_mask;
gboolean group_mod_is_accel_mod = FALSE;
const GdkModifierType mask = GDK_CONTROL_MASK |
GDK_SHIFT_MASK |
GDK_ALT_MASK |
GDK_SUPER_MASK |
GDK_HYPER_MASK |
GDK_META_MASK;
g_return_val_if_fail (GDK_IS_EVENT (event), GDK_KEY_MATCH_NONE);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_KEY_PRESS) ||
GDK_IS_EVENT_TYPE (event, GDK_KEY_RELEASE), GDK_KEY_MATCH_NONE);
keycode = self->keycode;
state = self->state & ~GDK_LOCK_MASK;
ev_keyval = self->translated[1].keyval;
layout = self->translated[1].layout;
level = self->translated[1].level;
consumed_modifiers = self->translated[1].consumed;
/* if the group-toggling modifier is part of the default accel mod
* mask, and it is active, disable it for matching
*
* FIXME: get shift group mask from backends
*/
shift_group_mask = 0;
if (mask & shift_group_mask)
group_mod_is_accel_mod = TRUE;
if ((modifiers & ~consumed_modifiers & mask) == (state & ~consumed_modifiers & mask))
{
/* modifier match */
GdkKeymapKey *keys;
int n_keys;
int i;
guint key;
/* Shift gets consumed and applied for the event,
* so apply it to our keyval to match
*/
key = keyval;
if (modifiers & GDK_SHIFT_MASK)
{
if (key == GDK_KEY_Tab)
key = GDK_KEY_ISO_Left_Tab;
else
key = gdk_keyval_to_upper (key);
}
if (ev_keyval == key && /* exact match */
(!group_mod_is_accel_mod ||
(state & shift_group_mask) == (modifiers & shift_group_mask)))
{
return GDK_KEY_MATCH_EXACT;
}
gdk_display_map_keyval (gdk_event_get_display (event), keyval, &keys, &n_keys);
for (i = 0; i < n_keys; i++)
{
if (keys[i].keycode == keycode &&
keys[i].level == level &&
/* Only match for group if it's an accel mod */
(!group_mod_is_accel_mod || keys[i].group == layout))
{
/* partial match */
g_free (keys);
return GDK_KEY_MATCH_PARTIAL;
}
}
g_free (keys);
}
return GDK_KEY_MATCH_NONE;
}
/**
* gdk_key_event_get_match:
* @event: (type GdkKeyEvent): a key #GdkEvent
* @keyval: (out): return location for a keyval
* @modifiers: (out): return location for modifiers
*
* Gets a keyval and modifier combination that will cause
* gdk_event_match() to successfully match the given event.
*
* Returns: %TRUE on success
*/
gboolean
gdk_key_event_get_match (GdkEvent *event,
guint *keyval,
GdkModifierType *modifiers)
{
GdkKeyEvent *self = (GdkKeyEvent *) event;
guint key;
guint accel_key;
GdkModifierType accel_mods;
GdkModifierType consumed_modifiers;
const GdkModifierType mask = GDK_CONTROL_MASK |
GDK_SHIFT_MASK |
GDK_ALT_MASK |
GDK_SUPER_MASK |
GDK_HYPER_MASK |
GDK_META_MASK;
g_return_val_if_fail (GDK_IS_EVENT (event), FALSE);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_KEY_PRESS) ||
GDK_IS_EVENT_TYPE (event, GDK_KEY_RELEASE), FALSE);
accel_key = self->translated[1].keyval;
accel_mods = self->state;
consumed_modifiers = self->translated[1].consumed;
if (accel_key == GDK_KEY_Sys_Req &&
(accel_mods & GDK_ALT_MASK) != 0)
{
/* HACK: we don't want to use SysRq as a keybinding (but we do
* want Alt+Print), so we avoid translation from Alt+Print to SysRq
*/
*keyval = GDK_KEY_Print;
*modifiers = accel_mods & mask;
return TRUE;
}
key = gdk_keyval_to_lower (accel_key);
if (key == GDK_KEY_ISO_Left_Tab)
key = GDK_KEY_Tab;
accel_mods &= mask & ~consumed_modifiers;
if (accel_key != key)
accel_mods |= GDK_SHIFT_MASK;
*keyval = key;
*modifiers = accel_mods;
return TRUE;
}
/* }}} */
/* {{{ GdkConfigureEvent */
static gboolean
gdk_configure_event_get_position (GdkEvent *event,
double *x,
double *y)
{
GdkConfigureEvent *self = (GdkConfigureEvent *) event;
*x = self->x;
*y = self->y;
return TRUE;
}
static const GdkEventTypeInfo gdk_configure_event_info = {
sizeof (GdkConfigureEvent),
NULL,
NULL,
NULL,
gdk_configure_event_get_position,
NULL,
NULL,
NULL,
};
GDK_DEFINE_EVENT_TYPE (GdkConfigureEvent, gdk_configure_event,
&gdk_configure_event_info,
GDK_EVENT_TYPE_SLOT (GDK_CONFIGURE))
GdkEvent *
gdk_configure_event_new (GdkSurface *surface,
int width,
int height)
{
GdkConfigureEvent *self;
g_return_val_if_fail (width >= 0 && height >= 0, NULL);
self = gdk_event_alloc (GDK_CONFIGURE, surface, NULL, NULL, GDK_CURRENT_TIME);
self->width = width;
self->height = height;
return (GdkEvent *) self;
}
/**
* gdk_configure_event_get_size:
* @event: (type GdkConfigureEvent): a configure event
* @width: (out): return location for surface width
* @height: (out): return location for surface height
*
* Extracts the surface size from a configure event.
*/
void
gdk_configure_event_get_size (GdkEvent *event,
int *width,
int *height)
{
GdkConfigureEvent *self = (GdkConfigureEvent *) event;
g_return_if_fail (GDK_IS_EVENT (event));
g_return_if_fail (GDK_IS_EVENT_TYPE (event, GDK_CONFIGURE));
*width = self->width;
*height = self->height;
}
/* }}} */
/* {{{ GdkTouchEvent */
static void
gdk_touch_event_finalize (GdkEvent *event)
{
GdkTouchEvent *self = (GdkTouchEvent *) event;
g_clear_pointer (&self->axes, g_free);
GDK_EVENT_SUPER (event)->finalize (event);
}
static GdkModifierType
gdk_touch_event_get_state (GdkEvent *event)
{
GdkTouchEvent *self = (GdkTouchEvent *) event;
return self->state;
}
static gboolean
gdk_touch_event_get_position (GdkEvent *event,
double *x,
double *y)
{
GdkTouchEvent *self = (GdkTouchEvent *) event;
*x = self->x;
*y = self->y;
return TRUE;
}
static GdkEventSequence *
gdk_touch_event_get_sequence (GdkEvent *event)
{
GdkTouchEvent *self = (GdkTouchEvent *) event;
return self->sequence;
}
static gboolean
gdk_touch_event_get_axes (GdkEvent *event,
double **axes,
guint *n_axes)
{
GdkTouchEvent *self = (GdkTouchEvent *) event;
GdkDevice *source_device = gdk_event_get_source_device (event);
if (source_device == NULL)
return FALSE;
*axes = self->axes;
*n_axes = gdk_device_get_n_axes (source_device);
return TRUE;
}
static const GdkEventTypeInfo gdk_touch_event_info = {
sizeof (GdkTouchEvent),
NULL,
gdk_touch_event_finalize,
gdk_touch_event_get_state,
gdk_touch_event_get_position,
gdk_touch_event_get_sequence,
NULL,
gdk_touch_event_get_axes,
};
GDK_DEFINE_EVENT_TYPE (GdkTouchEvent, gdk_touch_event,
&gdk_touch_event_info,
GDK_EVENT_TYPE_SLOT (GDK_TOUCH_BEGIN)
GDK_EVENT_TYPE_SLOT (GDK_TOUCH_END)
GDK_EVENT_TYPE_SLOT (GDK_TOUCH_UPDATE)
GDK_EVENT_TYPE_SLOT (GDK_TOUCH_CANCEL))
GdkEvent *
gdk_touch_event_new (GdkEventType type,
GdkEventSequence *sequence,
GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
GdkModifierType state,
double x,
double y,
double *axes,
gboolean emulating)
{
GdkTouchEvent *self;
g_return_val_if_fail (type == GDK_TOUCH_BEGIN ||
type == GDK_TOUCH_END ||
type == GDK_TOUCH_UPDATE ||
type == GDK_TOUCH_CANCEL, NULL);
self = gdk_event_alloc (type, surface, device, source_device, time);
self->sequence = sequence;
self->state = state;
self->x = x;
self->y = y;
self->axes = axes;
self->touch_emulating = emulating;
self->pointer_emulated = emulating;
return (GdkEvent *) self;
}
/**
* gdk_touch_event_get_emulating_pointer:
* @event: (type GdkTouchEvent): a touch event
*
* Extracts whether a touch event is emulating a pointer event.
*
* Returns: %TRUE if @event is emulating
**/
gboolean
gdk_touch_event_get_emulating_pointer (GdkEvent *event)
{
GdkTouchEvent *self = (GdkTouchEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), FALSE);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_TOUCH_BEGIN) ||
GDK_IS_EVENT_TYPE (event, GDK_TOUCH_UPDATE) ||
GDK_IS_EVENT_TYPE (event, GDK_TOUCH_END) ||
GDK_IS_EVENT_TYPE (event, GDK_TOUCH_CANCEL), FALSE);
return self->touch_emulating;
}
/* }}} */
/* {{{ GdkCrossingEvent */
static void
gdk_crossing_event_finalize (GdkEvent *event)
{
GdkCrossingEvent *self = (GdkCrossingEvent *) event;
g_clear_object (&self->child_surface);
GDK_EVENT_SUPER (self)->finalize (event);
}
static GdkModifierType
gdk_crossing_event_get_state (GdkEvent *event)
{
GdkCrossingEvent *self = (GdkCrossingEvent *) event;
return self->state;
}
static gboolean
gdk_crossing_event_get_position (GdkEvent *event,
double *x,
double *y)
{
GdkCrossingEvent *self = (GdkCrossingEvent *) event;
*x = self->x;
*y = self->y;
return TRUE;
}
static const GdkEventTypeInfo gdk_crossing_event_info = {
sizeof (GdkCrossingEvent),
NULL,
gdk_crossing_event_finalize,
gdk_crossing_event_get_state,
gdk_crossing_event_get_position,
NULL,
NULL,
NULL,
};
GDK_DEFINE_EVENT_TYPE (GdkCrossingEvent, gdk_crossing_event,
&gdk_crossing_event_info,
GDK_EVENT_TYPE_SLOT (GDK_ENTER_NOTIFY)
GDK_EVENT_TYPE_SLOT (GDK_LEAVE_NOTIFY))
GdkEvent *
gdk_crossing_event_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
GdkModifierType state,
double x,
double y,
GdkCrossingMode mode,
GdkNotifyType detail)
{
GdkCrossingEvent *self;
g_return_val_if_fail (type == GDK_ENTER_NOTIFY ||
type == GDK_LEAVE_NOTIFY, NULL);
self = gdk_event_alloc (type, surface, device, source_device, time);
self->state = state;
self->x = x;
self->y = y;
self->mode = mode;
self->detail = detail;
return (GdkEvent *) self;
}
/**
* gdk_crossing_event_get_mode:
* @event: (type GdkCrossingEvent): a crossing event
*
* Extracts the crossing mode from a crossing event.
*
* Returns: the mode of @event
*/
GdkCrossingMode
gdk_crossing_event_get_mode (GdkEvent *event)
{
GdkCrossingEvent *self = (GdkCrossingEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_ENTER_NOTIFY) ||
GDK_IS_EVENT_TYPE (event, GDK_LEAVE_NOTIFY), 0);
return self->mode;
}
/**
* gdk_crossing_event_get_focus:
* @event: (type GdkCrossingEvent): a crossing event
*
* Checks if the @event surface is the focus surface.
*
* Returns: %TRUE if the surface is the focus surface
*/
gboolean
gdk_crossing_event_get_focus (GdkEvent *event)
{
GdkCrossingEvent *self = (GdkCrossingEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), FALSE);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_ENTER_NOTIFY) ||
GDK_IS_EVENT_TYPE (event, GDK_LEAVE_NOTIFY), FALSE);
return self->focus;
}
/**
* gdk_crossing_event_get_detail:
* @event: (type GdkCrossingEvent): a crossing event
*
* Extracts the notify detail from a crossing event.
*
* Returns: the notify detail of @event
*/
GdkNotifyType
gdk_crossing_event_get_detail (GdkEvent *event)
{
GdkCrossingEvent *self = (GdkCrossingEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_ENTER_NOTIFY) ||
GDK_IS_EVENT_TYPE (event, GDK_LEAVE_NOTIFY), 0);
return self->detail;
}
/* }}} */
/* {{{ GdkDeleteEvent */
static const GdkEventTypeInfo gdk_delete_event_info = {
sizeof (GdkDeleteEvent),
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
};
GDK_DEFINE_EVENT_TYPE (GdkDeleteEvent, gdk_delete_event,
&gdk_delete_event_info,
GDK_EVENT_TYPE_SLOT (GDK_DELETE))
GdkEvent *
gdk_delete_event_new (GdkSurface *surface)
{
return gdk_event_alloc (GDK_DELETE, surface, NULL, NULL, GDK_CURRENT_TIME);
}
/* }}} */
/* {{{ GdkFocusEvent */
static const GdkEventTypeInfo gdk_focus_event_info = {
sizeof (GdkFocusEvent),
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
};
GDK_DEFINE_EVENT_TYPE (GdkFocusEvent, gdk_focus_event,
&gdk_focus_event_info,
GDK_EVENT_TYPE_SLOT (GDK_FOCUS_CHANGE))
GdkEvent *
gdk_focus_event_new (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
gboolean focus_in)
{
GdkFocusEvent *self = gdk_event_alloc (GDK_FOCUS_CHANGE, surface, device, source_device, GDK_CURRENT_TIME);
self->focus_in = focus_in;
return (GdkEvent *) self;
}
/**
* gdk_focus_event_get_in:
* @event: (type GdkScrollEvent): a focus change event
*
* Extracts whether this event is about focus entering or
* leaving the surface.
*
* Returns: %TRUE of the focus is entering
*/
gboolean
gdk_focus_event_get_in (GdkEvent *event)
{
GdkFocusEvent *self = (GdkFocusEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), FALSE);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_FOCUS_CHANGE), FALSE);
return self->focus_in;
}
/* }}} */
/* {{{ GdkScrollEvent */
static void
gdk_scroll_event_init (GdkEvent *event)
{
GdkScrollEvent *self = (GdkScrollEvent *) event;
self->x = NAN;
self->y = NAN;
}
static void
gdk_scroll_event_finalize (GdkEvent *event)
{
GdkScrollEvent *self = (GdkScrollEvent *) event;
g_clear_object (&self->tool);
GDK_EVENT_SUPER (self)->finalize (event);
}
static GdkModifierType
gdk_scroll_event_get_state (GdkEvent *event)
{
GdkScrollEvent *self = (GdkScrollEvent *) event;
return self->state;
}
static gboolean
gdk_scroll_event_get_position (GdkEvent *event,
double *x,
double *y)
{
GdkScrollEvent *self = (GdkScrollEvent *) event;
*x = self->x;
*y = self->y;
return TRUE;
}
static GdkDeviceTool *
gdk_scroll_event_get_tool (GdkEvent *event)
{
GdkScrollEvent *self = (GdkScrollEvent *) event;
return self->tool;
}
static const GdkEventTypeInfo gdk_scroll_event_info = {
sizeof (GdkScrollEvent),
gdk_scroll_event_init,
gdk_scroll_event_finalize,
gdk_scroll_event_get_state,
gdk_scroll_event_get_position,
NULL,
gdk_scroll_event_get_tool,
NULL,
};
GDK_DEFINE_EVENT_TYPE (GdkScrollEvent, gdk_scroll_event,
&gdk_scroll_event_info,
GDK_EVENT_TYPE_SLOT (GDK_SCROLL))
GdkEvent *
gdk_scroll_event_new (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
double delta_x,
double delta_y,
gboolean is_stop)
{
GdkScrollEvent *self = gdk_event_alloc (GDK_SCROLL, surface, device, source_device, time);
self->tool = tool != NULL ? g_object_ref (tool) : NULL;
self->state = state;
self->direction = GDK_SCROLL_SMOOTH;
self->delta_x = delta_x;
self->delta_y = delta_y;
self->is_stop = is_stop;
return (GdkEvent *) self;
}
GdkEvent *
gdk_scroll_event_new_discrete (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
GdkScrollDirection direction,
gboolean emulated)
{
GdkScrollEvent *self = gdk_event_alloc (GDK_SCROLL, surface, device, source_device, time);
self->tool = tool != NULL ? g_object_ref (tool) : NULL;
self->state = state;
self->direction = direction;
self->pointer_emulated = emulated;
return (GdkEvent *) self;
}
/**
* gdk_scroll_event_get_direction:
* @event: (type GdkScrollEvent): a scroll event
*
* Extracts the direction of a scroll event.
*
* Returns: the scroll direction of @event
*/
GdkScrollDirection
gdk_scroll_event_get_direction (GdkEvent *event)
{
GdkScrollEvent *self = (GdkScrollEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_SCROLL), 0);
return self->direction;
}
/**
* gdk_scroll_event_get_deltas:
* @event: (type GdkScrollEvent): a scroll event
* @delta_x: (out): return location for x scroll delta
* @delta_y: (out): return location for y scroll delta
*
* Extracts the scroll deltas of a scroll event.
*
* The deltas will be zero unless the scroll direction
* is %GDK_SCROLL_SMOOTH.
*/
void
gdk_scroll_event_get_deltas (GdkEvent *event,
double *delta_x,
double *delta_y)
{
GdkScrollEvent *self = (GdkScrollEvent *) event;
g_return_if_fail (GDK_IS_EVENT (event));
g_return_if_fail (GDK_IS_EVENT_TYPE (event, GDK_SCROLL));
*delta_x = self->delta_x;
*delta_y = self->delta_y;
}
/**
* gdk_scroll_event_is_stop:
* @event: (type GdkScrollEvent): a scroll event
*
* Check whether a scroll event is a stop scroll event. Scroll sequences
* with smooth scroll information may provide a stop scroll event once the
* interaction with the device finishes, e.g. by lifting a finger. This
* stop scroll event is the signal that a widget may trigger kinetic
* scrolling based on the current velocity.
*
* Stop scroll events always have a delta of 0/0.
*
* Returns: %TRUE if the event is a scroll stop event
*/
gboolean
gdk_scroll_event_is_stop (GdkEvent *event)
{
GdkScrollEvent *self = (GdkScrollEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), FALSE);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_SCROLL), FALSE);
return self->is_stop;
}
/* }}} */
/* {{{ GdkTouchpadEvent */
static GdkModifierType
gdk_touchpad_event_get_state (GdkEvent *event)
{
GdkTouchpadEvent *self = (GdkTouchpadEvent *) event;
return self->state;
}
static gboolean
gdk_touchpad_event_get_position (GdkEvent *event,
double *x,
double *y)
{
GdkTouchpadEvent *self = (GdkTouchpadEvent *) event;
*x = self->x;
*y = self->y;
return TRUE;
}
static const GdkEventTypeInfo gdk_touchpad_event_info = {
sizeof (GdkTouchpadEvent),
NULL,
NULL,
gdk_touchpad_event_get_state,
gdk_touchpad_event_get_position,
NULL,
NULL,
NULL,
};
GDK_DEFINE_EVENT_TYPE (GdkTouchpadEvent, gdk_touchpad_event,
&gdk_touchpad_event_info,
GDK_EVENT_TYPE_SLOT (GDK_TOUCHPAD_SWIPE)
GDK_EVENT_TYPE_SLOT (GDK_TOUCHPAD_PINCH))
GdkEvent *
gdk_touchpad_event_new_swipe (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
GdkModifierType state,
GdkTouchpadGesturePhase phase,
double x,
double y,
int n_fingers,
double dx,
double dy)
{
GdkTouchpadEvent *self = gdk_event_alloc (GDK_TOUCHPAD_SWIPE, surface, device, source_device, time);
self->state = state;
self->phase = phase;
self->x = x;
self->y = y;
self->dx = dx;
self->dy = dy;
self->n_fingers = n_fingers;
return (GdkEvent *) self;
}
GdkEvent *
gdk_touchpad_event_new_pinch (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
GdkModifierType state,
GdkTouchpadGesturePhase phase,
double x,
double y,
int n_fingers,
double dx,
double dy,
double scale,
double angle_delta)
{
GdkTouchpadEvent *self = gdk_event_alloc (GDK_TOUCHPAD_PINCH, surface, device, source_device, time);
self->state = state;
self->phase = phase;
self->x = x;
self->y = y;
self->dx = dx;
self->dy = dy;
self->n_fingers = n_fingers;
self->scale = scale;
self->angle_delta = angle_delta;
return (GdkEvent *) self;
}
/**
* gdk_touchpad_event_get_gesture_phase:
* @event: (type GdkTouchpadEvent): a touchpad #GdkEvent
*
* Extracts the touchpad gesture phase from a touchpad event.
*
* Returns: the gesture phase of @event
**/
GdkTouchpadGesturePhase
gdk_touchpad_event_get_gesture_phase (GdkEvent *event)
{
GdkTouchpadEvent *self = (GdkTouchpadEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_TOUCHPAD_PINCH) ||
GDK_IS_EVENT_TYPE (event, GDK_TOUCHPAD_SWIPE), 0);
return self->phase;
}
/**
* gdk_touchpad_event_get_n_fingers:
* @event: (type GdkTouchpadEvent): a touchpad event
*
* Extracts the number of fingers from a touchpad event.
*
* Returns: the number of fingers for @event
**/
guint
gdk_touchpad_event_get_n_fingers (GdkEvent *event)
{
GdkTouchpadEvent *self = (GdkTouchpadEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_TOUCHPAD_PINCH) ||
GDK_IS_EVENT_TYPE (event, GDK_TOUCHPAD_SWIPE), 0);
return self->n_fingers;
}
/**
* gdk_touchpad_event_get_deltas:
* @event: (type GdkTouchpadEvent): a touchpad event
* @dx: (out): return location for x
* @dy: (out): return location for y
*
* Extracts delta information from a touchpad event.
**/
void
gdk_touchpad_event_get_deltas (GdkEvent *event,
double *dx,
double *dy)
{
GdkTouchpadEvent *self = (GdkTouchpadEvent *) event;
g_return_if_fail (GDK_IS_EVENT (event));
g_return_if_fail (GDK_IS_EVENT_TYPE (event, GDK_TOUCHPAD_PINCH) ||
GDK_IS_EVENT_TYPE (event, GDK_TOUCHPAD_SWIPE));
*dx = self->dx;
*dy = self->dy;
}
/**
* gdk_touchpad_event_get_pinch_angle_delta:
* @event: (type GdkTouchpadEvent): a touchpad pinch event
*
* Extracts the angle delta from a touchpad pinch event.
*
* Returns: the angle delta of @event
*/
double
gdk_touchpad_event_get_pinch_angle_delta (GdkEvent *event)
{
GdkTouchpadEvent *self = (GdkTouchpadEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0.0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_TOUCHPAD_PINCH), 0.0);
return self->angle_delta;
}
/**
* gdk_touchpad_event_get_pinch_scale:
* @event: (type GdkTouchpadEvent): a touchpad pinch event
*
* Extracts the scale from a touchpad pinch event.
*
* Returns: the scale of @event
**/
double
gdk_touchpad_event_get_pinch_scale (GdkEvent *event)
{
GdkTouchpadEvent *self = (GdkTouchpadEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0.0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_TOUCHPAD_PINCH), 0.0);
return self->scale;
}
/* }}} */
/* {{{ GdkPadEvent */
static const GdkEventTypeInfo gdk_pad_event_info = {
sizeof (GdkPadEvent),
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
};
GDK_DEFINE_EVENT_TYPE (GdkPadEvent, gdk_pad_event,
&gdk_pad_event_info,
GDK_EVENT_TYPE_SLOT (GDK_PAD_BUTTON_PRESS)
GDK_EVENT_TYPE_SLOT (GDK_PAD_BUTTON_RELEASE)
GDK_EVENT_TYPE_SLOT (GDK_PAD_RING)
GDK_EVENT_TYPE_SLOT (GDK_PAD_STRIP)
GDK_EVENT_TYPE_SLOT (GDK_PAD_GROUP_MODE))
GdkEvent *
gdk_pad_event_new_ring (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
guint group,
guint index,
guint mode,
double value)
{
GdkPadEvent *self = gdk_event_alloc (GDK_PAD_RING, surface, device, source_device, time);
self->group = group;
self->index = index;
self->mode = mode;
self->value = value;
return (GdkEvent *) self;
}
GdkEvent *
gdk_pad_event_new_strip (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
guint group,
guint index,
guint mode,
double value)
{
GdkPadEvent *self = gdk_event_alloc (GDK_PAD_STRIP, surface, device, source_device, time);
self->group = group;
self->index = index;
self->mode = mode;
self->value = value;
return (GdkEvent *) self;
}
GdkEvent *
gdk_pad_event_new_button (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
guint group,
guint button,
guint mode)
{
GdkPadEvent *self;
g_return_val_if_fail (type == GDK_PAD_BUTTON_PRESS ||
type == GDK_PAD_BUTTON_RELEASE, NULL);
self = gdk_event_alloc (type, surface, device, source_device, time);
self->group = group;
self->button = button;
self->mode = mode;
return (GdkEvent *) self;
}
GdkEvent *
gdk_pad_event_new_group_mode (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
guint group,
guint mode)
{
GdkPadEvent *self = gdk_event_alloc (GDK_PAD_GROUP_MODE, surface, device, source_device, time);
self->group = group;
self->mode = mode;
return (GdkEvent *) self;
}
/**
* gdk_pad_event_get_button:
* @event: (type GdkPadEvent): a pad button event
*
* Extracts information about the pressed button from
* a pad event.
*
* Returns: the button of @event
**/
guint
gdk_pad_event_get_button (GdkEvent *event)
{
GdkPadEvent *self = (GdkPadEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), 0);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_PAD_BUTTON_PRESS) ||
GDK_IS_EVENT_TYPE (event, GDK_PAD_BUTTON_RELEASE), 0);
return self->button;
}
/**
* gdk_pad_event_get_axis_value:
* @event: (type GdkPadEvent): a pad strip or ring event
* @index: (out): Return location for the axis index
* @value: (out): Return location for the axis value
*
* Extracts the information from a pad strip or ring event.
**/
void
gdk_pad_event_get_axis_value (GdkEvent *event,
guint *index,
double *value)
{
GdkPadEvent *self = (GdkPadEvent *) event;
g_return_if_fail (GDK_IS_EVENT (event));
g_return_if_fail (GDK_IS_EVENT_TYPE (event, GDK_PAD_RING) ||
GDK_IS_EVENT_TYPE (event, GDK_PAD_STRIP));
*index = self->index;
*value = self->value;
}
/**
* gdk_pad_event_get_group_mode:
* @event: (type GdkPadEvent): a pad event
* @group: (out): return location for the group
* @mode: (out): return location for the mode
*
* Extracts group and mode information from a pad event.
**/
void
gdk_pad_event_get_group_mode (GdkEvent *event,
guint *group,
guint *mode)
{
GdkPadEvent *self = (GdkPadEvent *) event;
g_return_if_fail (GDK_IS_EVENT (event));
g_return_if_fail (GDK_IS_EVENT_TYPE (event, GDK_PAD_GROUP_MODE) ||
GDK_IS_EVENT_TYPE (event, GDK_PAD_BUTTON_PRESS) ||
GDK_IS_EVENT_TYPE (event, GDK_PAD_BUTTON_RELEASE) ||
GDK_IS_EVENT_TYPE (event, GDK_PAD_RING) ||
GDK_IS_EVENT_TYPE (event, GDK_PAD_STRIP));
*group = self->group;
*mode = self->mode;
}
/* }}} */
/* {{{ GdkMotionEvent */
static void
gdk_motion_event_finalize (GdkEvent *event)
{
GdkMotionEvent *self = (GdkMotionEvent *) event;
g_clear_object (&self->tool);
g_clear_pointer (&self->axes, g_free);
g_list_free_full (self->history, g_free);
GDK_EVENT_SUPER (event)->finalize (event);
}
static GdkModifierType
gdk_motion_event_get_state (GdkEvent *event)
{
GdkMotionEvent *self = (GdkMotionEvent *) event;
return self->state;
}
static gboolean
gdk_motion_event_get_position (GdkEvent *event,
double *x,
double *y)
{
GdkMotionEvent *self = (GdkMotionEvent *) event;
*x = self->x;
*y = self->y;
return TRUE;
}
static GdkDeviceTool *
gdk_motion_event_get_tool (GdkEvent *event)
{
GdkMotionEvent *self = (GdkMotionEvent *) event;
return self->tool;
}
static gboolean
gdk_motion_event_get_axes (GdkEvent *event,
double **axes,
guint *n_axes)
{
GdkMotionEvent *self = (GdkMotionEvent *) event;
GdkDevice *source_device = gdk_event_get_source_device (event);
if (source_device == NULL)
return FALSE;
*axes = self->axes;
*n_axes = gdk_device_get_n_axes (source_device);
return TRUE;
}
static const GdkEventTypeInfo gdk_motion_event_info = {
sizeof (GdkMotionEvent),
NULL,
gdk_motion_event_finalize,
gdk_motion_event_get_state,
gdk_motion_event_get_position,
NULL,
gdk_motion_event_get_tool,
gdk_motion_event_get_axes,
};
GDK_DEFINE_EVENT_TYPE (GdkMotionEvent, gdk_motion_event,
&gdk_motion_event_info,
GDK_EVENT_TYPE_SLOT (GDK_MOTION_NOTIFY))
GdkEvent *
gdk_motion_event_new (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
double x,
double y,
double *axes)
{
GdkMotionEvent *self = gdk_event_alloc (GDK_MOTION_NOTIFY, surface, device, source_device, time);
self->tool = tool ? g_object_ref (tool) : NULL;
self->state = state;
self->x = x;
self->y = y;
self->axes = axes;
self->state = state;
return (GdkEvent *) self;
}
/**
* gdk_motion_event_get_history:
* @event: (type GdkMotionEvent): a motion #GdkEvent
*
* Retrieves the history of the @event motion, as a list of time and
* coordinates.
*
* Returns: (transfer container) (element-type GdkTimeCoord) (nullable): a list
* of time and coordinates
*/
GList *
gdk_motion_event_get_history (GdkEvent *event)
{
GdkMotionEvent *self = (GdkMotionEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_MOTION_NOTIFY), NULL);
return g_list_reverse (g_list_copy (self->history));
}
/* }}} */
/* {{{ GdkProximityEvent */
static void
gdk_proximity_event_finalize (GdkEvent *event)
{
GdkProximityEvent *self = (GdkProximityEvent *) event;
g_clear_object (&self->tool);
GDK_EVENT_SUPER (event)->finalize (event);
}
static GdkDeviceTool *
gdk_proximity_event_get_tool (GdkEvent *event)
{
GdkProximityEvent *self = (GdkProximityEvent *) event;
return self->tool;
}
static const GdkEventTypeInfo gdk_proximity_event_info = {
sizeof (GdkProximityEvent),
NULL,
gdk_proximity_event_finalize,
NULL,
NULL,
NULL,
gdk_proximity_event_get_tool,
NULL,
};
GDK_DEFINE_EVENT_TYPE (GdkProximityEvent, gdk_proximity_event,
&gdk_proximity_event_info,
GDK_EVENT_TYPE_SLOT (GDK_PROXIMITY_IN)
GDK_EVENT_TYPE_SLOT (GDK_PROXIMITY_OUT))
GdkEvent *
gdk_proximity_event_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
GdkDeviceTool *tool,
guint32 time)
{
GdkProximityEvent *self;
g_return_val_if_fail (type == GDK_PROXIMITY_IN ||
type == GDK_PROXIMITY_OUT, NULL);
self = gdk_event_alloc (type, surface, device, source_device, time);
self->tool = tool ? g_object_ref (tool) : NULL;
return (GdkEvent *) self;
}
/* }}} */
/* {{{ GdkDNDEvent */
static void
gdk_dnd_event_finalize (GdkEvent *event)
{
GdkDNDEvent *self = (GdkDNDEvent *) event;
g_clear_object (&self->drop);
GDK_EVENT_SUPER (event)->finalize (event);
}
static gboolean
gdk_dnd_event_get_position (GdkEvent *event,
double *x,
double *y)
{
GdkDNDEvent *self = (GdkDNDEvent *) event;
*x = self->x;
*y = self->y;
return TRUE;
}
static GdkEventSequence *
gdk_dnd_event_get_sequence (GdkEvent *event)
{
GdkDNDEvent *self = (GdkDNDEvent *) event;
return (GdkEventSequence *) self->drop;
}
static const GdkEventTypeInfo gdk_dnd_event_info = {
sizeof (GdkDNDEvent),
NULL,
gdk_dnd_event_finalize,
NULL,
gdk_dnd_event_get_position,
gdk_dnd_event_get_sequence,
NULL,
NULL,
};
GDK_DEFINE_EVENT_TYPE (GdkDNDEvent, gdk_dnd_event,
&gdk_dnd_event_info,
GDK_EVENT_TYPE_SLOT (GDK_DRAG_ENTER)
GDK_EVENT_TYPE_SLOT (GDK_DRAG_MOTION)
GDK_EVENT_TYPE_SLOT (GDK_DRAG_LEAVE)
GDK_EVENT_TYPE_SLOT (GDK_DROP_START))
GdkEvent *
gdk_dnd_event_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDrop *drop,
guint32 time,
double x,
double y)
{
GdkDNDEvent *self;
g_return_val_if_fail (type == GDK_DRAG_ENTER ||
type == GDK_DRAG_MOTION ||
type == GDK_DRAG_LEAVE ||
type == GDK_DROP_START, NULL);
self = gdk_event_alloc (type, surface, device, NULL, time);
self->drop = drop != NULL ? g_object_ref (drop) : NULL;
self->x = x;
self->y = y;
return (GdkEvent *) self;
}
/**
* gdk_dnd_event_get_drop:
* @event: (type GdkDNDEvent): a DND event
*
* Gets the #GdkDrop from a DND event.
*
* Returns: (transfer none) (nullable): the drop
**/
GdkDrop *
gdk_dnd_event_get_drop (GdkEvent *event)
{
GdkDNDEvent *self = (GdkDNDEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_DRAG_ENTER) ||
GDK_IS_EVENT_TYPE (event, GDK_DRAG_MOTION) ||
GDK_IS_EVENT_TYPE (event, GDK_DRAG_LEAVE) ||
GDK_IS_EVENT_TYPE (event, GDK_DROP_START), NULL);
return self->drop;
}
/* }}} */
/* {{{ GdkGrabBrokenEvent */
static const GdkEventTypeInfo gdk_grab_broken_event_info = {
sizeof (GdkGrabBrokenEvent),
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
};
GDK_DEFINE_EVENT_TYPE (GdkGrabBrokenEvent, gdk_grab_broken_event,
&gdk_grab_broken_event_info,
GDK_EVENT_TYPE_SLOT (GDK_GRAB_BROKEN))
GdkEvent *
gdk_grab_broken_event_new (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
GdkSurface *grab_surface,
gboolean implicit)
{
GdkGrabBrokenEvent *self = gdk_event_alloc (GDK_GRAB_BROKEN, surface, device, source_device, GDK_CURRENT_TIME);
self->grab_surface = grab_surface;
self->implicit = implicit;
self->keyboard = gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD;
return (GdkEvent *) self;
}
/**
* gdk_grab_broken_event_get_grab_surface:
* @event: (type GdkGrabBrokenEvent): a grab broken event
*
* Extracts the grab surface from a grab broken event.
*
* Returns: (transfer none): the grab surface of @event
**/
GdkSurface *
gdk_grab_broken_event_get_grab_surface (GdkEvent *event)
{
GdkGrabBrokenEvent *self = (GdkGrabBrokenEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_GRAB_BROKEN), NULL);
return self->grab_surface;
}
/**
* gdk_grab_broken_event_get_implicit:
* @event: (type GdkGrabBrokenEvent): a grab broken event
*
* Checks whether the grab broken event is for an implicit grab.
*
* Returns: %TRUE if the an implicit grab was broken
*/
gboolean
gdk_grab_broken_event_get_implicit (GdkEvent *event)
{
GdkGrabBrokenEvent *self = (GdkGrabBrokenEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), FALSE);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_GRAB_BROKEN), FALSE);
return self->implicit;
}
/* }}} */
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