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gtk/gdk/gdkevents.c
José Expósito 6ebb38e12e gdk/events: Set discrete scroll deltas in its constructor 
Instead of calculating the discrete scroll deltas in
GtkEventControllerScroll, move that code to the event constructor and
access the precalculated values using gdk_scroll_event_get_deltas.

Refactor, no functional changes.
2022-08-10 14:23:58 +00:00

3387 lines
87 KiB
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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 "gdkdisplayprivate.h"
#include "gdkdragprivate.h"
#include "gdkdropprivate.h"
#include "gdkeventsprivate.h"
#include "gdkintl.h"
#include "gdkkeysprivate.h"
#include "gdkkeysyms.h"
#include "gdk-private.h"
#include <gobject/gvaluecollector.h>
#include <string.h>
#include <math.h>
/**
* GdkEvent: (ref-func gdk_event_ref) (unref-func gdk_event_unref)
*
* `GdkEvent`s are immutable data structures, created by GDK to
* represent windowing system events.
*
* In GTK applications the events are handled automatically by toplevel
* widgets and passed on to the event controllers of appropriate widgets,
* so using `GdkEvent` and its related API is rarely needed.
*/
/**
* 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 char *
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)
{
g_clear_object (&self->surface);
g_clear_object (&self->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 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`:w
* 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_memdup2 (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 `GdkEvent`Type
*
* Associates a `GdkEvent` type with the given `GdkEvent`Type 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 `GdkEvent`TypeInfo 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 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 `GdkEvent`Type to allocate
* @surface: (nullable): the `GdkSurface` of the event
* @device: (nullable): the `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,
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->time = time_;
if (device != NULL && time_ != GDK_CURRENT_TIME)
gdk_device_set_timestamp (device, time_);
return event;
}
static void
gdk_event_init_types_once (void)
{
g_type_ensure (GDK_TYPE_BUTTON_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 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;
}
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
*/
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->event_type == GDK_SCROLL && gdk_scroll_event_get_direction (event) == GDK_SCROLL_SMOOTH)) &&
(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_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
*/
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;
}
/*
* If the last N events in the event queue are smooth scroll events
* for the same surface, the same device and the same scroll unit,
* combine them into one.
*
* We give the remaining event a history with N items, and deltas
* that are the sum over the history entries.
*/
void
gdk_event_queue_handle_scroll_compression (GdkDisplay *display)
{
GList *l;
GdkSurface *surface = NULL;
GdkDevice *device = NULL;
GdkEvent *last_event = NULL;
GList *scrolls = NULL;
GArray *history = NULL;
GdkScrollUnit scroll_unit = GDK_SCROLL_UNIT_WHEEL;
gboolean scroll_unit_defined = FALSE;
GdkTimeCoord hist;
l = g_queue_peek_tail_link (&display->queued_events);
while (l)
{
GdkEvent *event = l->data;
GdkScrollEvent *scroll_event = (GdkScrollEvent *) event;
if (event->flags & GDK_EVENT_PENDING)
break;
if (event->event_type != GDK_SCROLL ||
gdk_scroll_event_get_direction (event) != GDK_SCROLL_SMOOTH)
break;
if (surface != NULL &&
surface != event->surface)
break;
if (device != NULL &&
device != event->device)
break;
if (scroll_unit_defined &&
scroll_unit != scroll_event->unit)
break;
if (!last_event)
last_event = event;
surface = event->surface;
device = event->device;
scroll_unit = scroll_event->unit;
scroll_unit_defined = TRUE;
scrolls = l;
l = l->prev;
}
while (scrolls && scrolls->next != NULL)
{
GdkEvent *event = scrolls->data;
GList *next = scrolls->next;
double dx, dy;
gboolean inherited = FALSE;
if (!history && ((GdkScrollEvent *)event)->history)
{
history = ((GdkScrollEvent *)event)->history;
((GdkScrollEvent *)event)->history = NULL;
inherited = TRUE;
}
if (!history)
history = g_array_new (FALSE, TRUE, sizeof (GdkTimeCoord));
if (!inherited)
{
gdk_scroll_event_get_deltas (event, &dx, &dy);
memset (&hist, 0, sizeof (GdkTimeCoord));
hist.time = gdk_event_get_time (event);
hist.flags = GDK_AXIS_FLAG_DELTA_X | GDK_AXIS_FLAG_DELTA_Y;
hist.axes[GDK_AXIS_DELTA_X] = dx;
hist.axes[GDK_AXIS_DELTA_Y] = dy;
g_array_append_val (history, hist);
}
gdk_event_unref (event);
g_queue_delete_link (&display->queued_events, scrolls);
scrolls = next;
}
if (scrolls && history)
{
GdkEvent *old_event, *event;
double dx, dy;
old_event = scrolls->data;
gdk_scroll_event_get_deltas (old_event, &dx, &dy);
memset (&hist, 0, sizeof (GdkTimeCoord));
hist.time = gdk_event_get_time (old_event);
hist.flags = GDK_AXIS_FLAG_DELTA_X | GDK_AXIS_FLAG_DELTA_Y;
hist.axes[GDK_AXIS_DELTA_X] = dx;
hist.axes[GDK_AXIS_DELTA_Y] = dy;
g_array_append_val (history, hist);
dx = dy = 0;
for (int i = 0; i < history->len; i++)
{
GdkTimeCoord *val = &g_array_index (history, GdkTimeCoord, i);
dx += val->axes[GDK_AXIS_DELTA_X];
dy += val->axes[GDK_AXIS_DELTA_Y];
}
event = gdk_scroll_event_new (surface,
device,
gdk_event_get_device_tool (old_event),
gdk_event_get_time (old_event),
gdk_event_get_modifier_state (old_event),
dx,
dy,
gdk_scroll_event_is_stop (old_event),
scroll_unit);
((GdkScrollEvent *)event)->history = history;
g_queue_delete_link (&display->queued_events, scrolls);
g_queue_push_tail (&display->queued_events, event);
gdk_event_unref (old_event);
}
}
static void
gdk_motion_event_push_history (GdkEvent *event,
GdkEvent *history_event)
{
GdkMotionEvent *self = (GdkMotionEvent *) event;
GdkDeviceTool *tool;
GdkTimeCoord hist;
int i;
g_assert (GDK_IS_EVENT_TYPE (event, GDK_MOTION_NOTIFY));
g_assert (GDK_IS_EVENT_TYPE (history_event, GDK_MOTION_NOTIFY));
if (G_UNLIKELY (!self->history))
self->history = g_array_new (FALSE, TRUE, sizeof (GdkTimeCoord));
if (((GdkMotionEvent *)history_event)->history)
{
GArray *history = ((GdkMotionEvent *)history_event)->history;
g_array_append_vals (self->history, history->data, history->len);
}
tool = gdk_event_get_device_tool (history_event);
memset (&hist, 0, sizeof (GdkTimeCoord));
hist.time = gdk_event_get_time (history_event);
if (tool)
{
hist.flags = gdk_device_tool_get_axes (tool);
for (i = GDK_AXIS_X; i < GDK_AXIS_LAST; i++)
gdk_event_get_axis (history_event, i, &hist.axes[i]);
}
/* GdkTimeCoord has no dedicated fields to record event position. For plain
* pointer events, and for tools which don't report GDK_AXIS_X/GDK_AXIS_Y
* on their own, we surface the position using the X and Y input axes.
*/
if (!(hist.flags & GDK_AXIS_FLAG_X) || !(hist.flags & GDK_AXIS_FLAG_Y))
{
hist.flags |= GDK_AXIS_FLAG_X | GDK_AXIS_FLAG_Y;
gdk_event_get_position (history_event, &hist.axes[GDK_AXIS_X], &hist.axes[GDK_AXIS_Y]);
}
g_array_append_val (self->history, hist);
}
/* If the last N events in the event queue are motion notify
* events for the same surface, drop all but the last.
*
* If a button is held down or the device has a tool, then
* we give the remaining events a history containing the N-1
* dropped events.
*/
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;
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)
{
if ((gdk_event_get_modifier_state (last_motion) &
(GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK |
GDK_BUTTON4_MASK | GDK_BUTTON5_MASK)) ||
gdk_event_get_device_tool (last_motion) != NULL)
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;
}
}
void
_gdk_event_queue_flush (GdkDisplay *display)
{
while (TRUE)
{
GdkEvent *event;
event = (GdkEvent *)g_queue_pop_head (&display->queued_events);
if (!event)
return;
event->flags |= GDK_EVENT_FLUSHED;
_gdk_event_emit (event);
gdk_event_unref (event);
}
}
/**
* 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.
*
* If the last reference is dropped, the structure is freed.
*/
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.
*
* Emulated pointer events typically originate from a touch events.
*
* 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;
}
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.
*
* To find out which axes are used, use [method@Gdk.DeviceTool.get_axes]
* on the device tool returned by [method@Gdk.Event.get_device_tool].
*
* 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;
*value = axes[axis_use];
return TRUE;
}
/**
* gdk_event_triggers_context_menu:
* @event: a `GdkEvent`, currently only button events are meaningful values
*
* Returns whether a `GdkEvent` should trigger a context menu,
* according to platform conventions.
*
* The right mouse button typically 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,
double *x_distance,
double *y_distance,
double *distance)
{
double x1, x2, y1, y2;
double 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
*
* Returns the distance between the event locations.
*
* This assumes that both events have X/Y information.
* If not, this function returns %FALSE.
*
* Returns: %TRUE if the distance could be calculated.
**/
gboolean
gdk_events_get_distance (GdkEvent *event1,
GdkEvent *event2,
double *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
*
* Returns the relative angle from @event1 to @event2.
*
* The relative angle is the angle between the X axis and the line
* through both events' positions. The rotation direction for positive
* angles is from the positive X axis towards the positive Y axis.
*
* This assumes that both events have X/Y information.
* If not, this function returns %FALSE.
*
* Returns: %TRUE if the angle could be calculated.
*/
gboolean
gdk_events_get_angle (GdkEvent *event1,
GdkEvent *event2,
double *angle)
{
double 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
*
* Returns the point halfway between the events' positions.
*
* This assumes that both events have X/Y information.
* If not, this function returns %FALSE.
*
* Returns: %TRUE if the center could be calculated.
*/
gboolean
gdk_events_get_center (GdkEvent *event1,
GdkEvent *event2,
double *x,
double *y)
{
double 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.
*
* To find out which axes are used, use [method@Gdk.DeviceTool.get_axes]
* on the device tool returned by [method@Gdk.Event.get_device_tool].
*
* 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);
}
double *
gdk_event_dup_axes (GdkEvent *event)
{
double *axes;
guint n_axes;
if (gdk_event_get_axes (event, &axes, &n_axes))
{
double *axes_copy = g_memdup2 (axes, n_axes * sizeof (double));
return axes_copy;
}
return NULL;
}
/**
* gdk_event_get_event_type:
* @event: a `GdkEvent`
*
* Retrieves the type of the event.
*
* Returns: a `GdkEvent`Type
*/
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 surface associated with an event.
*
* Returns: (transfer none) (nullable): 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_seat:
* @event: a `GdkEvent`
*
* Returns the seat that originated the event.
*
* Returns: (nullable) (transfer none): a `GdkSeat`.
*/
GdkSeat *
gdk_event_get_seat (GdkEvent *event)
{
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
return event->device ? gdk_device_get_seat (event->device) : NULL;
}
/**
* 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_device_tool:
* @event: a `GdkEvent`
*
* Returns a `GdkDeviceTool` representing the tool that
* caused the event.
*
* If the was not generated by a device that supports
* different tools (such as a tablet), this function will
* return %NULL.
*
* Note: the `GdkDeviceTool` will be constant during
* the application lifetime, if settings must be stored
* persistently across runs, see [method@Gdk.DeviceTool.get_serial].
*
* Returns: (transfer none) (nullable): The current device tool
*/
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 timestamp of @event.
*
* Not all events have timestamps. In that case, this function
* returns %GDK_CURRENT_TIME.
*
* Returns: timestamp 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 display 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`
*
* Retuns the event sequence to which the event belongs.
*
* Related touch events are connected in a sequence. Other
* events typically don't have event sequence information.
*
* 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 */
/**
* GdkButtonEvent:
*
* An event related to a button on a pointer device.
*/
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_device (event);
if (source_device == NULL)
return FALSE;
*axes = self->axes;
*n_axes = GDK_AXIS_LAST;
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,
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, 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 */
/**
* GdkKeyEvent:
*
* An event related to a key-based device.
*/
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 surface of the event
* @device: the device 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,
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, 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;
}
/*< private >
* gdk_key_event_get_translated_key:
* @event: (type GdkKeyEvent): a key event
* @no_lock: whether the translated key should take the event
* state into account
*
* Extracts the translated key from a key event.
*
* Returns: (transfer none): the translated key
*/
GdkTranslatedKey *
gdk_key_event_get_translated_key (GdkEvent *event,
gboolean no_lock)
{
GdkKeyEvent *self = (GdkKeyEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_KEY_PRESS) ||
GDK_IS_EVENT_TYPE (event, GDK_KEY_RELEASE), NULL);
if (no_lock)
return &(self->translated[1]);
return &(self->translated[0]);
}
/**
* 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;
}
static gboolean
keyval_in_group (GdkKeymap *keymap,
guint keyval,
int group)
{
GdkKeymapKey *keys;
guint n_keys;
gdk_keymap_get_cached_entries_for_keyval (keymap, keyval, &keys, &n_keys);
for (int i = 0; i < n_keys; i++)
{
if (keys[i].group == group)
return TRUE;
}
return FALSE;
}
/**
* 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 keyval and modifiers.
*
* This is typically used to trigger keyboard shortcuts such as Ctrl-C.
*
* 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;
GdkKeymap *keymap;
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;
guint 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;
}
keymap = gdk_display_get_keymap (gdk_event_get_display (event));
gdk_keymap_get_cached_entries_for_keyval (keymap, 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 */
(keys[i].group == layout ||
(!group_mod_is_accel_mod && !keyval_in_group (keymap, keyval, layout))))
return GDK_KEY_MATCH_PARTIAL;
}
}
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 match
* the event.
*
* See [method@Gdk.KeyEvent.matches].
*
* 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;
}
/* }}} */
/* {{{ GdkTouchEvent */
/**
* GdkTouchEvent:
*
* An event related to a touch-based device.
*/
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_device (event);
if (source_device == NULL)
return FALSE;
*axes = self->axes;
*n_axes = GDK_AXIS_LAST;
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,
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, 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 */
/**
* GdkCrossingEvent:
*
* An event caused by a pointing device moving between surfaces.
*/
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,
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, 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 */
/**
* GdkDeleteEvent:
*
* An event related to closing a top-level surface.
*/
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, GDK_CURRENT_TIME);
}
/* }}} */
/* {{{ GdkFocusEvent */
/**
* GdkFocusEvent:
*
* An event related to a keyboard focus change.
*/
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,
gboolean focus_in)
{
GdkFocusEvent *self = gdk_event_alloc (GDK_FOCUS_CHANGE, surface, device, GDK_CURRENT_TIME);
self->focus_in = focus_in;
return (GdkEvent *) self;
}
/**
* gdk_focus_event_get_in:
* @event: (type GdkFocusEvent): 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 */
/**
* GdkScrollEvent:
*
* An event related to a scrolling motion.
*/
static void
gdk_scroll_event_finalize (GdkEvent *event)
{
GdkScrollEvent *self = (GdkScrollEvent *) event;
g_clear_object (&self->tool);
if (self->history)
g_array_free (self->history, TRUE);
GDK_EVENT_SUPER (self)->finalize (event);
}
static GdkModifierType
gdk_scroll_event_get_state (GdkEvent *event)
{
GdkScrollEvent *self = (GdkScrollEvent *) event;
return self->state;
}
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),
NULL,
gdk_scroll_event_finalize,
gdk_scroll_event_get_state,
NULL,
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,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
double delta_x,
double delta_y,
gboolean is_stop,
GdkScrollUnit unit)
{
GdkScrollEvent *self = gdk_event_alloc (GDK_SCROLL, surface, 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;
self->unit = unit;
return (GdkEvent *) self;
}
GdkEvent *
gdk_scroll_event_new_discrete (GdkSurface *surface,
GdkDevice *device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
GdkScrollDirection direction)
{
GdkScrollEvent *self = gdk_event_alloc (GDK_SCROLL, surface, device, time);
double delta_x = 0, delta_y = 0;
switch (direction)
{
case GDK_SCROLL_UP:
delta_y = -1;
break;
case GDK_SCROLL_DOWN:
delta_y = 1;
break;
case GDK_SCROLL_LEFT:
delta_x = -1;
break;
case GDK_SCROLL_RIGHT:
delta_x = 1;
break;
case GDK_SCROLL_SMOOTH:
default:
g_assert_not_reached ();
break;
}
self->tool = tool != NULL ? g_object_ref (tool) : NULL;
self->state = state;
self->direction = direction;
self->delta_x = delta_x;
self->delta_y = delta_y;
self->unit = GDK_SCROLL_UNIT_WHEEL;
return (GdkEvent *) self;
}
/*< private >
* gtk_scroll_event_new_value120:
* @surface: the `GdkSurface` of the event
* @device: the `GdkDevice` of the event
* @tool: (nullable): the tool that generated to event
* @time: the event serial
* @state: Flags to indicate the state of modifier keys and mouse buttons
* in events.
* @direction: scroll direction.
* @delta_x: delta on the X axis in the 120.0 scale
* @delta_x: delta on the Y axis in the 120.0 scale
*
* Creates a new discrete GdkScrollEvent for high resolution mouse wheels.
*
* Both axes send data in fractions of 120 where each multiple of 120
* amounts to one logical scroll event. Fractions of 120 indicate a wheel
* movement less than one detent.
*
* Returns: the newly created scroll event
*/
GdkEvent *
gdk_scroll_event_new_value120 (GdkSurface *surface,
GdkDevice *device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
GdkScrollDirection direction,
double delta_x,
double delta_y)
{
GdkScrollEvent *self = gdk_event_alloc (GDK_SCROLL, surface, device, time);
self->tool = tool != NULL ? g_object_ref (tool) : NULL;
self->state = state;
self->direction = direction;
self->delta_x = delta_x / 120.0;
self->delta_y = delta_y / 120.0;
self->unit = GDK_SCROLL_UNIT_WHEEL;
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.
*
* For the representation unit of these deltas, see
* [method@Gdk.ScrollEvent.get_unit].
*/
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;
}
/**
* gdk_scroll_event_get_unit:
* @event: (type GdkScrollEvent): a scroll event.
*
* Extracts the scroll delta unit of a scroll event.
*
* The unit will always be %GDK_SCROLL_UNIT_WHEEL if the scroll direction is not
* %GDK_SCROLL_SMOOTH.
*
* Returns: the scroll unit.
*
* Since: 4.8
*/
GdkScrollUnit
gdk_scroll_event_get_unit (GdkEvent *event)
{
GdkScrollEvent *self = (GdkScrollEvent *) event;
g_return_val_if_fail (GDK_IS_EVENT (event), GDK_SCROLL_UNIT_WHEEL);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_SCROLL),
GDK_SCROLL_UNIT_WHEEL);
return self->unit;
}
/* }}} */
/* {{{ GdkTouchpadEvent */
/**
* GdkTouchpadEvent:
*
* An event related to a gesture on a touchpad device.
*
* Unlike touchscreens, where the windowing system sends basic
* sequences of begin, update, end events, and leaves gesture
* recognition to the clients, touchpad gestures are typically
* processed by the system, resulting in these events.
*/
static GdkModifierType
gdk_touchpad_event_get_state (GdkEvent *event)
{
GdkTouchpadEvent *self = (GdkTouchpadEvent *) event;
return self->state;
}
static GdkEventSequence *
gdk_touchpad_event_get_sequence (GdkEvent *event)
{
GdkTouchpadEvent *self = (GdkTouchpadEvent *) event;
return self->sequence;
}
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,
gdk_touchpad_event_get_sequence,
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)
GDK_EVENT_TYPE_SLOT (GDK_TOUCHPAD_HOLD))
GdkEvent *
gdk_touchpad_event_new_swipe (GdkSurface *surface,
GdkEventSequence *sequence,
GdkDevice *device,
guint32 time,
GdkModifierType state,
GdkTouchpadGesturePhase phase,
double x,
double y,
int n_fingers,
double dx,
double dy)
{
GdkTouchpadEvent *self;
g_return_val_if_fail (phase == GDK_TOUCHPAD_GESTURE_PHASE_BEGIN ||
phase == GDK_TOUCHPAD_GESTURE_PHASE_END ||
phase == GDK_TOUCHPAD_GESTURE_PHASE_UPDATE ||
phase == GDK_TOUCHPAD_GESTURE_PHASE_CANCEL, NULL);
self = gdk_event_alloc (GDK_TOUCHPAD_SWIPE, surface, device, time);
self->sequence = sequence;
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,
GdkEventSequence *sequence,
GdkDevice *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;
g_return_val_if_fail (phase == GDK_TOUCHPAD_GESTURE_PHASE_BEGIN ||
phase == GDK_TOUCHPAD_GESTURE_PHASE_END ||
phase == GDK_TOUCHPAD_GESTURE_PHASE_UPDATE ||
phase == GDK_TOUCHPAD_GESTURE_PHASE_CANCEL, NULL);
self = gdk_event_alloc (GDK_TOUCHPAD_PINCH, surface, device, time);
self->sequence = sequence;
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;
}
GdkEvent *
gdk_touchpad_event_new_hold (GdkSurface *surface,
GdkEventSequence *sequence,
GdkDevice *device,
guint32 time,
GdkModifierType state,
GdkTouchpadGesturePhase phase,
double x,
double y,
int n_fingers)
{
GdkTouchpadEvent *self = gdk_event_alloc (GDK_TOUCHPAD_HOLD, surface, device, time);
self->state = state;
self->phase = phase;
self->sequence = sequence;
self->x = x;
self->y = y;
self->n_fingers = n_fingers;
return (GdkEvent *) self;
}
/**
* gdk_touchpad_event_get_gesture_phase:
* @event: (type GdkTouchpadEvent): a touchpad event
*
* 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) ||
GDK_IS_EVENT_TYPE (event, GDK_TOUCHPAD_HOLD), 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) ||
GDK_IS_EVENT_TYPE (event, GDK_TOUCHPAD_HOLD), 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 */
/**
* GdkPadEvent:
*
* An event related to a pad-based device.
*/
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,
guint32 time,
guint group,
guint index,
guint mode,
double value)
{
GdkPadEvent *self = gdk_event_alloc (GDK_PAD_RING, surface, 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,
guint32 time,
guint group,
guint index,
guint mode,
double value)
{
GdkPadEvent *self = gdk_event_alloc (GDK_PAD_STRIP, surface, 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,
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, time);
self->group = group;
self->button = button;
self->mode = mode;
return (GdkEvent *) self;
}
GdkEvent *
gdk_pad_event_new_group_mode (GdkSurface *surface,
GdkDevice *device,
guint32 time,
guint group,
guint mode)
{
GdkPadEvent *self = gdk_event_alloc (GDK_PAD_GROUP_MODE, surface, 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 */
/**
* GdkMotionEvent:
*
* An event related to a pointer or touch device motion.
*/
static void
gdk_motion_event_finalize (GdkEvent *event)
{
GdkMotionEvent *self = (GdkMotionEvent *) event;
g_clear_object (&self->tool);
g_clear_pointer (&self->axes, g_free);
if (self->history)
g_array_free (self->history, TRUE);
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_device (event);
if (source_device == NULL)
return FALSE;
*axes = self->axes;
*n_axes = GDK_AXIS_LAST;
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,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
double x,
double y,
double *axes)
{
GdkMotionEvent *self = gdk_event_alloc (GDK_MOTION_NOTIFY, surface, 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_event_get_history:
* @event: a motion or scroll event
* @out_n_coords: (out): Return location for the length of the returned array
*
* Retrieves the history of the device that @event is for, as a list of
* time and coordinates.
*
* The history includes positions that are not delivered as separate events
* to the application because they occurred in the same frame as @event.
*
* Note that only motion and scroll events record history, and motion
* events do it only if one of the mouse buttons is down, or the device
* has a tool.
*
* Returns: (transfer container) (array length=out_n_coords) (nullable): an
* array of time and coordinates
*/
GdkTimeCoord *
gdk_event_get_history (GdkEvent *event,
guint *out_n_coords)
{
GArray *history;
g_return_val_if_fail (GDK_IS_EVENT (event), NULL);
g_return_val_if_fail (GDK_IS_EVENT_TYPE (event, GDK_MOTION_NOTIFY) ||
GDK_IS_EVENT_TYPE (event, GDK_SCROLL), NULL);
g_return_val_if_fail (out_n_coords != NULL, NULL);
if (GDK_IS_EVENT_TYPE (event, GDK_MOTION_NOTIFY))
{
GdkMotionEvent *self = (GdkMotionEvent *) event;
history = self->history;
}
else
{
GdkScrollEvent *self = (GdkScrollEvent *) event;
history = self->history;
}
if (history && history->len > 0)
{
GdkTimeCoord *result;
*out_n_coords = history->len;
result = g_malloc (sizeof (GdkTimeCoord) * history->len);
memcpy (result, history->data, sizeof (GdkTimeCoord) * history->len);
return result;
}
*out_n_coords = 0;
return NULL;
}
/* }}} */
/* {{{ GdkProximityEvent */
/**
* GdkProximityEvent:
*
* An event related to the proximity of a tool to a device.
*/
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,
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, time);
self->tool = tool ? g_object_ref (tool) : NULL;
return (GdkEvent *) self;
}
/* }}} */
/* {{{ GdkDNDEvent */
/**
* GdkDNDEvent:
*
* An event related to drag and drop operations.
*/
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, 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` object 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 */
/**
* GdkGrabBrokenEvent:
*
* An event related to a broken windowing system grab.
*/
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,
GdkSurface *grab_surface,
gboolean implicit)
{
GdkGrabBrokenEvent *self = gdk_event_alloc (GDK_GRAB_BROKEN, surface, 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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