gtk2/gdk/gdkevents.c
Matthias Clasen 14be8f6b73 Remove uses of modifier intents in gdkevents.c
This removes the use of the context menu and shift group
intents in gdkevents.c. If it turns out to be important,
we need to introduce vfuncs for gdk_event_triggers_context_menu
and gdk_event_matches.
2020-04-06 16:32:03 -04:00

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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 <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:
*
* 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.
*/
G_DEFINE_BOXED_TYPE (GdkEvent, gdk_event,
gdk_event_ref,
gdk_event_unref)
static gboolean
check_event_sanity (GdkEvent *event)
{
if (event->any.device != NULL &&
gdk_surface_get_display (event->any.surface) != gdk_device_get_display (event->any.device))
{
char *type = g_enum_to_string (GDK_TYPE_EVENT_TYPE, event->any.type);
g_warning ("Event of type %s with mismatched device display", type);
g_free (type);
return FALSE;
}
if (event->any.source_device != NULL &&
gdk_surface_get_display (event->any.surface) != gdk_device_get_display (event->any.source_device))
{
char *type = g_enum_to_string (GDK_TYPE_EVENT_TYPE, event->any.type);
g_warning ("Event of type %s with mismatched source device display", type);
g_free (type);
return FALSE;
}
return TRUE;
}
void
_gdk_event_emit (GdkEvent *event)
{
if (!check_event_sanity (event))
return;
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->any.flags & GDK_EVENT_PENDING) == 0 &&
(!paused || (event->any.flags & GDK_EVENT_FLUSHED) != 0))
{
if (pending_motion)
return pending_motion;
if (event->any.type == GDK_MOTION_NOTIFY && (event->any.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 isnt 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 isnt 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_event_push_history (GdkEvent *event,
GdkEvent *history_event)
{
GdkTimeCoord *hist;
GdkDevice *device;
gint i, n_axes;
g_assert (event->any.type == GDK_MOTION_NOTIFY);
g_assert (history_event->any.type == 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]);
event->motion.history = g_list_prepend (event->motion.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->any.flags & GDK_EVENT_PENDING)
break;
if (event->any.type != GDK_MOTION_NOTIFY)
break;
if (pending_motion_surface != NULL &&
pending_motion_surface != event->any.surface)
break;
if (pending_motion_device != NULL &&
pending_motion_device != event->any.device)
break;
if (!last_motion)
last_motion = event;
pending_motion_surface = event->any.surface;
pending_motion_device = event->any.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 &&
(last_motion->motion.state &
(GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK |
GDK_BUTTON4_MASK | GDK_BUTTON5_MASK)))
gdk_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->any.flags |= GDK_EVENT_FLUSHED;
}
}
/**
* gdk_event_ref:
* @event: a #GdkEvent
*
* Increase the ref count of @event.
*
* Returns: @event
*/
GdkEvent *
gdk_event_ref (GdkEvent *event)
{
event->any.ref_count++;
return event;
}
static void gdk_event_free (GdkEvent *event);
/**
* gdk_event_unref:
* @event: a #GdkEvent
*
* Decrease the ref count of @event, and free it
* if the last reference is dropped.
*/
void
gdk_event_unref (GdkEvent *event)
{
event->any.ref_count--;
if (event->any.ref_count == 0)
gdk_event_free (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)
{
return event->any.pointer_emulated;
}
static void
gdk_event_free (GdkEvent *event)
{
GdkDisplay *display;
switch ((guint) event->any.type)
{
case GDK_ENTER_NOTIFY:
case GDK_LEAVE_NOTIFY:
g_clear_object (&event->crossing.child_surface);
break;
case GDK_DRAG_ENTER:
case GDK_DRAG_LEAVE:
case GDK_DRAG_MOTION:
case GDK_DROP_START:
g_clear_object (&event->dnd.drop);
break;
case GDK_BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
g_clear_object (&event->button.tool);
g_free (event->button.axes);
break;
case GDK_TOUCH_BEGIN:
case GDK_TOUCH_UPDATE:
case GDK_TOUCH_END:
case GDK_TOUCH_CANCEL:
g_free (event->touch.axes);
break;
case GDK_MOTION_NOTIFY:
g_clear_object (&event->motion.tool);
g_free (event->motion.axes);
g_list_free_full (event->motion.history, g_free);
break;
case GDK_PROXIMITY_IN:
case GDK_PROXIMITY_OUT:
g_clear_object (&event->proximity.tool);
break;
case GDK_SCROLL:
g_clear_object (&event->scroll.tool);
break;
default:
break;
}
display = gdk_event_get_display (event);
if (display)
_gdk_display_event_data_free (display, event);
if (event->any.surface)
g_object_unref (event->any.surface);
g_clear_object (&event->any.device);
g_clear_object (&event->any.source_device);
g_free (event);
}
/**
* 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;
if (axis_use == GDK_AXIS_X || axis_use == GDK_AXIS_Y)
{
gdouble x, y;
switch ((guint) event->any.type)
{
case GDK_MOTION_NOTIFY:
x = event->motion.x;
y = event->motion.y;
break;
case GDK_BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
x = event->button.x;
y = event->button.y;
break;
case GDK_TOUCH_BEGIN:
case GDK_TOUCH_UPDATE:
case GDK_TOUCH_END:
case GDK_TOUCH_CANCEL:
x = event->touch.x;
y = event->touch.y;
break;
case GDK_ENTER_NOTIFY:
case GDK_LEAVE_NOTIFY:
x = event->crossing.x;
y = event->crossing.y;
break;
default:
return FALSE;
}
if (axis_use == GDK_AXIS_X && value)
*value = x;
if (axis_use == GDK_AXIS_Y && value)
*value = y;
return TRUE;
}
else if (event->any.type == GDK_BUTTON_PRESS ||
event->any.type == GDK_BUTTON_RELEASE)
{
axes = event->button.axes;
}
else if (event->any.type == GDK_TOUCH_BEGIN ||
event->any.type == GDK_TOUCH_UPDATE ||
event->any.type == GDK_TOUCH_END ||
event->any.type == GDK_TOUCH_CANCEL)
{
axes = event->touch.axes;
}
else if (event->any.type == GDK_MOTION_NOTIFY)
{
axes = event->motion.axes;
}
else
return FALSE;
return gdk_device_get_axis (event->any.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->any.type == GDK_BUTTON_PRESS)
{
GdkEventButton *bevent = (GdkEventButton *) event;
g_return_val_if_fail (GDK_IS_SURFACE (bevent->any.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)
{
GdkDevice *source_device;
if (!event)
return FALSE;
source_device = gdk_event_get_source_device (event);
if (!source_device)
return FALSE;
if (event->any.type == GDK_MOTION_NOTIFY)
{
*axes = event->motion.axes;
*n_axes = gdk_device_get_n_axes (source_device);
return TRUE;
}
else if (event->any.type == GDK_BUTTON_PRESS ||
event->any.type == GDK_BUTTON_RELEASE)
{
*axes = event->button.axes;
*n_axes = gdk_device_get_n_axes (source_device);
return TRUE;
}
else if (event->any.type == GDK_TOUCH_BEGIN ||
event->any.type == GDK_TOUCH_UPDATE ||
event->any.type == GDK_TOUCH_END ||
event->any.type == GDK_TOUCH_CANCEL)
{
*axes = event->touch.axes;
*n_axes = gdk_device_get_n_axes (source_device);
return TRUE;
}
return FALSE;
}
/**
* gdk_event_get_motion_history:
* @event: a #GdkEvent of type %GDK_MOTION_NOTIFY
*
* 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_event_get_motion_history (GdkEvent *event)
{
if (event->any.type != GDK_MOTION_NOTIFY)
return NULL;
return g_list_reverse (g_list_copy (event->motion.history));
}
GdkEvent *
gdk_event_button_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
guint button,
double x,
double y,
double *axes)
{
GdkEventButton *event;
g_return_val_if_fail (type == GDK_BUTTON_PRESS ||
type == GDK_BUTTON_RELEASE, NULL);
event = g_new0 (GdkEventButton, 1);
event->any.ref_count = 1;
event->any.type = type;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->tool = tool ? g_object_ref (tool) : NULL;
event->axes = NULL;
event->state = state;
event->button = button;
event->x = x;
event->y = y;
event->axes = axes;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_motion_new (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
double x,
double y,
double *axes)
{
GdkEventMotion *event = g_new0 (GdkEventMotion, 1);
event->any.ref_count = 1;
event->any.type = GDK_MOTION_NOTIFY;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->tool = tool ? g_object_ref (tool) : NULL;
event->state = state;
event->x = x;
event->y = y;
event->axes = axes;
event->state = state;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_crossing_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
GdkModifierType state,
double x,
double y,
GdkCrossingMode mode,
GdkNotifyType detail)
{
GdkEventCrossing *event;
g_return_val_if_fail (type == GDK_ENTER_NOTIFY ||
type == GDK_LEAVE_NOTIFY, NULL);
event = g_new0 (GdkEventCrossing, 1);
event->any.ref_count = 1;
event->any.type = type;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->state = state;
event->x = x;
event->y = y;
event->mode = mode;
event->detail = detail;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_proximity_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
GdkDeviceTool *tool,
guint32 time)
{
GdkEventProximity *event;
g_return_val_if_fail (type == GDK_PROXIMITY_IN ||
type == GDK_PROXIMITY_OUT, NULL);
event = g_new0 (GdkEventProximity, 1);
event->any.ref_count = 1;
event->any.type = type;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->tool = tool ? g_object_ref (tool) : NULL;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_key_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
guint keycode,
GdkModifierType state,
gboolean is_modifier,
GdkTranslatedKey *translated,
GdkTranslatedKey *no_lock)
{
GdkEventKey *event;
g_return_val_if_fail (type == GDK_KEY_PRESS ||
type == GDK_KEY_RELEASE, NULL);
event = g_new0 (GdkEventKey, 1);
event->any.ref_count = 1;
event->any.type = type;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->keycode = keycode;
event->state = state;
event->any.key_is_modifier = is_modifier;
event->translated[0] = *translated;
event->translated[1] = *no_lock;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_configure_new (GdkSurface *surface,
int width,
int height)
{
GdkEventConfigure *event = g_new0 (GdkEventConfigure, 1);
event->any.ref_count = 1;
event->any.type = GDK_CONFIGURE;
event->any.time = GDK_CURRENT_TIME;
event->any.surface = g_object_ref (surface);
event->width = width;
event->height = height;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_delete_new (GdkSurface *surface)
{
GdkEventAny *event = g_new0 (GdkEventAny, 1);
event->ref_count = 1;
event->type = GDK_DELETE;
event->time = GDK_CURRENT_TIME;
event->surface = g_object_ref (surface);
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_focus_new (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
gboolean focus_in)
{
GdkEventFocus *event = g_new0 (GdkEventFocus, 1);
event->any.ref_count = 1;
event->any.type = GDK_FOCUS_CHANGE;
event->any.time = GDK_CURRENT_TIME;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->any.focus_in = focus_in;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_scroll_new (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
double delta_x,
double delta_y,
gboolean is_stop)
{
GdkEventScroll *event = g_new0 (GdkEventScroll, 1);
event->any.ref_count = 1;
event->any.type = GDK_SCROLL;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->tool = tool ? g_object_ref (tool) : NULL;
event->state = state;
event->x = NAN;
event->y = NAN;
event->direction = GDK_SCROLL_SMOOTH;
event->delta_x = delta_x;
event->delta_y = delta_y;
event->any.scroll_is_stop = is_stop;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_discrete_scroll_new (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
GdkDeviceTool *tool,
guint32 time,
GdkModifierType state,
GdkScrollDirection direction,
gboolean emulated)
{
GdkEventScroll *event = g_new0 (GdkEventScroll, 1);
event->any.ref_count = 1;
event->any.type = GDK_SCROLL;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->tool = tool ? g_object_ref (tool) : NULL;
event->state = state;
event->x = NAN;
event->y = NAN;
event->direction = direction;
event->any.pointer_emulated = emulated;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_touch_new (GdkEventType type,
GdkEventSequence *sequence,
GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
GdkModifierType state,
double x,
double y,
double *axes,
gboolean emulating)
{
GdkEventTouch *event;
g_return_val_if_fail (type == GDK_TOUCH_BEGIN ||
type == GDK_TOUCH_END ||
type == GDK_TOUCH_UPDATE ||
type == GDK_TOUCH_CANCEL, NULL);
event = g_new0 (GdkEventTouch, 1);
event->any.ref_count = 1;
event->any.type = type;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->sequence = sequence;
event->state = state;
event->x = x;
event->y = y;
event->axes = axes;
event->any.touch_emulating = emulating;
event->any.pointer_emulated = emulating;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_touchpad_swipe_new (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
GdkModifierType state,
GdkTouchpadGesturePhase phase,
double x,
double y,
int n_fingers,
double dx,
double dy)
{
GdkEventTouchpadSwipe *event = g_new0 (GdkEventTouchpadSwipe, 1);
event->any.ref_count = 1;
event->any.type = GDK_TOUCHPAD_SWIPE;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->state = state;
event->phase = phase;
event->x = x;
event->y = y;
event->dx = dx;
event->dy = dy;
event->n_fingers = n_fingers;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_touchpad_pinch_new (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)
{
GdkEventTouchpadPinch *event = g_new0 (GdkEventTouchpadPinch, 1);
event->any.ref_count = 1;
event->any.type = GDK_TOUCHPAD_PINCH;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->state = state;
event->phase = phase;
event->x = x;
event->y = y;
event->dx = dx;
event->dy = dy;
event->n_fingers = n_fingers;
event->scale = scale;
event->angle_delta = angle_delta;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_pad_ring_new (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
guint group,
guint index,
guint mode,
double value)
{
GdkEventPadAxis *event = g_new0 (GdkEventPadAxis, 1);
event->any.ref_count = 1;
event->any.type = GDK_PAD_RING;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->group = group;
event->index = index;
event->mode = mode;
event->value = value;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_pad_strip_new (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
guint group,
guint index,
guint mode,
double value)
{
GdkEventPadAxis *event = g_new0 (GdkEventPadAxis, 1);
event->any.ref_count = 1;
event->any.type = GDK_PAD_STRIP;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->group = group;
event->index = index;
event->mode = mode;
event->value = value;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_pad_button_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
guint group,
guint button,
guint mode)
{
GdkEventPadButton *event;
g_return_val_if_fail (type == GDK_PAD_BUTTON_PRESS ||
type == GDK_PAD_BUTTON_RELEASE, NULL);
event = g_new0 (GdkEventPadButton, 1);
event->any.ref_count = 1;
event->any.type = type;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->group = group;
event->button = button;
event->mode = mode;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_pad_group_mode_new (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
guint32 time,
guint group,
guint mode)
{
GdkEventPadGroupMode *event = g_new0 (GdkEventPadGroupMode, 1);
event->any.ref_count = 1;
event->any.type = GDK_PAD_GROUP_MODE;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->group = group;
event->mode = mode;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_drag_new (GdkEventType type,
GdkSurface *surface,
GdkDevice *device,
GdkDrop *drop,
guint32 time,
double x,
double y)
{
GdkEventDND *event;
g_return_val_if_fail (type == GDK_DRAG_ENTER ||
type == GDK_DRAG_MOTION ||
type == GDK_DRAG_LEAVE ||
type == GDK_DROP_START, NULL);
event = g_new0 (GdkEventDND, 1);
event->any.ref_count = 1;
event->any.type = type;
event->any.time = time;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->drop = g_object_ref (drop);
event->x = x;
event->y = y;
return (GdkEvent *)event;
}
GdkEvent *
gdk_event_grab_broken_new (GdkSurface *surface,
GdkDevice *device,
GdkDevice *source_device,
GdkSurface *grab_surface,
gboolean implicit)
{
GdkEventGrabBroken *event = g_new0 (GdkEventGrabBroken, 1);
event->any.ref_count = 1;
event->any.type = GDK_GRAB_BROKEN;
event->any.time = GDK_CURRENT_TIME;
event->any.surface = g_object_ref (surface);
event->any.device = g_object_ref (device);
event->any.source_device = g_object_ref (source_device);
event->grab_surface = grab_surface;
event->implicit = implicit;
event->keyboard = gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD;
return (GdkEvent *)event;
}
/**
* 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)
{
return event->any.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)
{
return event->any.surface;
}
/**
* gdk_event_get_device:
* @event: a #GdkEvent.
*
* Returns the device of an event.
*
* Returns: (nullable) (transfer none): a #GdkDevice, or %NULL.
**/
GdkDevice *
gdk_event_get_device (GdkEvent *event)
{
return event->any.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 wasnt 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)
{
if (event->any.source_device)
return event->any.source_device;
return event->any.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): The current device tool, or %NULL
**/
GdkDeviceTool *
gdk_event_get_device_tool (GdkEvent *event)
{
if (event->any.type == GDK_BUTTON_PRESS ||
event->any.type == GDK_BUTTON_RELEASE)
return event->button.tool;
else if (event->any.type == GDK_MOTION_NOTIFY)
return event->motion.tool;
else if (event->any.type == GDK_PROXIMITY_IN ||
event->any.type == GDK_PROXIMITY_OUT)
return event->proximity.tool;
else if (event->any.type == GDK_SCROLL)
return event->scroll.tool;
return NULL;
}
/**
* 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)
{
return event->any.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)
{
if (event->any.surface)
return gdk_surface_get_display (event->any.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)
{
switch ((int) event->any.type)
{
case GDK_TOUCH_BEGIN:
case GDK_TOUCH_UPDATE:
case GDK_TOUCH_END:
case GDK_TOUCH_CANCEL:
return event->touch.sequence;
case GDK_DRAG_ENTER:
case GDK_DRAG_LEAVE:
case GDK_DRAG_MOTION:
case GDK_DROP_START:
return (GdkEventSequence *) event->dnd.drop;
default:
return NULL;
}
}
/**
* 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)
{
#if 0
g_return_val_if_fail (event->any.type == GDK_ENTER_NOTIFY ||
event->any.type == GDK_LEAVE_NOTIFY ||
event->any.type == GDK_BUTTON_PRESS ||
event->any.type == GDK_BUTTON_RELEASE ||
event->any.type == GDK_MOTION_NOTIFY ||
event->any.type == GDK_TOUCH_BEGIN ||
event->any.type == GDK_TOUCH_UPDATE ||
event->any.type == GDK_TOUCH_END ||
event->any.type == GDK_TOUCH_CANCEL ||
event->any.type == GDK_TOUCHPAD_SWIPE ||
event->any.type == GDK_TOUCHPAD_PINCH||
event->any.type == GDK_SCROLL ||
event->any.type == GDK_KEY_PRESS ||
event->any.type == GDK_KEY_RELEASE, 0);
#endif
switch ((int)event->any.type)
{
case GDK_ENTER_NOTIFY:
case GDK_LEAVE_NOTIFY:
return event->crossing.state;
case GDK_BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
return event->button.state;
case GDK_MOTION_NOTIFY:
return event->motion.state;
case GDK_TOUCH_BEGIN:
case GDK_TOUCH_UPDATE:
case GDK_TOUCH_END:
case GDK_TOUCH_CANCEL:
return event->touch.state;
case GDK_TOUCHPAD_SWIPE:
return event->touchpad_swipe.state;
case GDK_TOUCHPAD_PINCH:
return event->touchpad_pinch.state;
case GDK_SCROLL:
return event->scroll.state;
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
return event->key.state;
default:
/* no state field */
break;
}
return 0;
}
/**
* 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)
{
#if 0
g_return_if_fail (event->any.type == GDK_ENTER_NOTIFY ||
event->any.type == GDK_LEAVE_NOTIFY ||
event->any.type == GDK_BUTTON_PRESS ||
event->any.type == GDK_BUTTON_RELEASE ||
event->any.type == GDK_MOTION_NOTIFY ||
event->any.type == GDK_TOUCH_BEGIN ||
event->any.type == GDK_TOUCH_UPDATE ||
event->any.type == GDK_TOUCH_END ||
event->any.type == GDK_TOUCH_CANCEL ||
event->any.type == GDK_TOUCHPAD_SWIPE ||
event->any.type == GDK_TOUCHPAD_PINCH||
event->any.type == GDK_DRAG_ENTER ||
event->any.type == GDK_DRAG_LEAVE ||
event->any.type == GDK_DRAG_MOTION ||
event->any.type == GDK_DROP_START);
#endif
switch ((int)event->any.type)
{
case GDK_ENTER_NOTIFY:
case GDK_LEAVE_NOTIFY:
*x = event->crossing.x;
*y = event->crossing.y;
break;
case GDK_BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
*x = event->button.x;
*y = event->button.y;
break;
case GDK_MOTION_NOTIFY:
*x = event->motion.x;
*y = event->motion.y;
break;
case GDK_TOUCH_BEGIN:
case GDK_TOUCH_UPDATE:
case GDK_TOUCH_END:
case GDK_TOUCH_CANCEL:
*x = event->touch.x;
*y = event->touch.y;
break;
case GDK_TOUCHPAD_SWIPE:
*x = event->touchpad_swipe.x;
*y = event->touchpad_swipe.y;
break;
case GDK_TOUCHPAD_PINCH:
*x = event->touchpad_pinch.x;
*y = event->touchpad_pinch.y;
break;
case GDK_DRAG_ENTER:
case GDK_DRAG_LEAVE:
case GDK_DRAG_MOTION:
case GDK_DROP_START:
*x = event->dnd.x;
*y = event->dnd.y;
break;
default:
/* no position */
*x = NAN;
*y = NAN;
return FALSE;
}
return TRUE;
}
/**
* gdk_button_event_get_button:
* @event: a button event
*
* Extract the button number from a button event.
*
* Returns: the button of @event
**/
guint
gdk_button_event_get_button (GdkEvent *event)
{
g_return_val_if_fail (event->any.type == GDK_BUTTON_PRESS ||
event->any.type == GDK_BUTTON_RELEASE, 0);
return event->button.button;
}
/**
* gdk_key_event_get_keyval:
* @event: a key event
*
* Extracts the keyval from a key event.
*
* Returns: the keyval of @event
*/
guint
gdk_key_event_get_keyval (GdkEvent *event)
{
g_return_val_if_fail (event->any.type == GDK_KEY_PRESS ||
event->any.type == GDK_KEY_RELEASE, 0);
return event->key.translated[0].keyval;
}
/**
* gdk_key_event_get_keycode:
* @event: a key event
*
* Extracts the keycode from a key event.
*
* Returns: the keycode of @event
*/
guint
gdk_key_event_get_keycode (GdkEvent *event)
{
g_return_val_if_fail (event->any.type == GDK_KEY_PRESS ||
event->any.type == GDK_KEY_RELEASE, 0);
return event->key.keycode;
}
/**
* gdk_key_event_get_level:
* @event: 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)
{
g_return_val_if_fail (event->any.type == GDK_KEY_PRESS ||
event->any.type == GDK_KEY_RELEASE, 0);
return event->key.translated[0].level;
}
/**
* gdk_key_event_get_layout:
* @event: a key event
*
* Extracts the layout from a key event.
*
* Returns: the layout of @event
*/
guint
gdk_key_event_get_layout (GdkEvent *event)
{
g_return_val_if_fail (event->any.type == GDK_KEY_PRESS ||
event->any.type == GDK_KEY_RELEASE, 0);
return event->key.translated[0].layout;
}
/**
* gdk_key_event_get_consumed_modifiers:
* @event: 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)
{
g_return_val_if_fail (event->any.type == GDK_KEY_PRESS ||
event->any.type == GDK_KEY_RELEASE, 0);
return event->key.translated[0].consumed;
}
/**
* gdk_key_event_is_modifier:
* @event: 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)
{
g_return_val_if_fail (event->any.type == GDK_KEY_PRESS ||
event->any.type == GDK_KEY_RELEASE, FALSE);
return event->any.key_is_modifier;
}
/**
* gdk_configure_event_get_size:
* @event: 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)
{
g_return_if_fail (event->any.type == GDK_CONFIGURE);
*width = event->configure.width;
*height = event->configure.height;
}
/**
* gdk_touch_event_get_emulating_pointer:
* @event: 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)
{
g_return_val_if_fail (event->any.type == GDK_TOUCH_BEGIN ||
event->any.type == GDK_TOUCH_UPDATE ||
event->any.type == GDK_TOUCH_END ||
event->any.type == GDK_TOUCH_CANCEL, FALSE);
return event->any.touch_emulating;
}
/**
* gdk_crossing_event_get_mode:
* @event: a crossing event
*
* Extracts the crossing mode from a crossing event.
*
* Returns: the mode of @event
*/
GdkCrossingMode
gdk_crossing_event_get_mode (GdkEvent *event)
{
g_return_val_if_fail (event->any.type == GDK_ENTER_NOTIFY ||
event->any.type == GDK_LEAVE_NOTIFY, 0);
return event->crossing.mode;
}
/**
* gdk_crossing_event_get_detail:
* @event: 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)
{
g_return_val_if_fail (event->any.type == GDK_ENTER_NOTIFY ||
event->any.type == GDK_LEAVE_NOTIFY, 0);
return event->crossing.detail;
}
/**
* gdk_focus_event_get_in:
* @event: 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)
{
g_return_val_if_fail (event->any.type == GDK_FOCUS_CHANGE, FALSE);
return event->any.focus_in;
}
/**
* gdk_scroll_event_get_direction:
* @event: a scroll event
*
* Extracts the direction of a scroll event.
*
* Returns: the scroll direction of @event
*/
GdkScrollDirection
gdk_scroll_event_get_direction (GdkEvent *event)
{
g_return_val_if_fail (event->any.type == GDK_SCROLL, 0);
return event->scroll.direction;
}
/**
* gdk_scroll_event_get_deltas:
* @event: 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)
{
g_return_if_fail (event->any.type == GDK_SCROLL);
*delta_x = event->scroll.delta_x;
*delta_y = event->scroll.delta_y;
}
/**
* gdk_scroll_event_is_stop:
* @event: 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)
{
g_return_val_if_fail (event->any.type == GDK_SCROLL, FALSE);
return event->any.scroll_is_stop;
}
/**
* gdk_touchpad_event_get_gesture_phase:
* @event: 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)
{
g_return_val_if_fail (event->any.type == GDK_TOUCHPAD_PINCH ||
event->any.type == GDK_TOUCHPAD_SWIPE, 0);
if (event->any.type == GDK_TOUCHPAD_PINCH)
return event->touchpad_pinch.phase;
else if (event->any.type == GDK_TOUCHPAD_SWIPE)
return event->touchpad_swipe.phase;
return 0;
}
/**
* gdk_touchpad_event_get_n_fingers:
* @event: 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)
{
g_return_val_if_fail (event->any.type == GDK_TOUCHPAD_PINCH ||
event->any.type == GDK_TOUCHPAD_SWIPE, 0);
if (event->any.type == GDK_TOUCHPAD_PINCH)
return event->touchpad_pinch.n_fingers;
else if (event->any.type == GDK_TOUCHPAD_SWIPE)
return event->touchpad_swipe.n_fingers;
return 0;
}
/**
* gdk_touchpad_event_get_deltas:
* @event: 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)
{
g_return_if_fail (event->any.type == GDK_TOUCHPAD_PINCH ||
event->any.type == GDK_TOUCHPAD_SWIPE);
if (event->any.type == GDK_TOUCHPAD_PINCH)
{
*dx = event->touchpad_pinch.dx;
*dy = event->touchpad_pinch.dy;
}
else if (event->any.type == GDK_TOUCHPAD_SWIPE)
{
*dx = event->touchpad_swipe.dx;
*dy = event->touchpad_swipe.dy;
}
else
{
*dx = NAN;
*dy = NAN;
}
}
/**
* gdk_touchpad_pinch_event_get_angle_delta:
* @event: a touchpad pinch event
*
* Extracts the angle delta from a touchpad pinch event.
*
* Returns: the angle delta of @event
*/
double
gdk_touchpad_pinch_event_get_angle_delta (GdkEvent *event)
{
g_return_val_if_fail (event->any.type == GDK_TOUCHPAD_PINCH, 0);
return event->touchpad_pinch.angle_delta;
}
/**
* gdk_touchpad_pinch_event_get_scale:
* @event: a touchpad pinch event
*
* Extracts the scale from a touchpad pinch event.
*
* Returns: the scale of @event
**/
double
gdk_touchpad_pinch_event_get_scale (GdkEvent *event)
{
g_return_val_if_fail (event->any.type == GDK_TOUCHPAD_PINCH, 0);
return event->touchpad_pinch.scale;
}
/**
* gdk_pad_button_event_get_button:
* @event: a pad button event
*
* Extracts information about the pressed button from
* a pad event.
*
* Returns: the button of @event
**/
guint
gdk_pad_button_event_get_button (GdkEvent *event)
{
g_return_val_if_fail (event->any.type == GDK_PAD_BUTTON_PRESS ||
event->any.type == GDK_PAD_BUTTON_RELEASE, 0);
return event->pad_button.button;
}
/**
* gdk_pad_axis_event_get_value:
* @event: 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_axis_event_get_value (GdkEvent *event,
guint *index,
gdouble *value)
{
g_return_if_fail (event->any.type == GDK_PAD_RING ||
event->any.type == GDK_PAD_STRIP);
*index = event->pad_axis.index;
*value = event->pad_axis.value;
}
/**
* gdk_pad_event_get_group_mode:
* @event: 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)
{
g_return_if_fail (event->any.type == GDK_PAD_GROUP_MODE ||
event->any.type == GDK_PAD_BUTTON_PRESS ||
event->any.type == GDK_PAD_BUTTON_RELEASE ||
event->any.type == GDK_PAD_RING ||
event->any.type == GDK_PAD_STRIP);
switch ((guint)event->any.type)
{
case GDK_PAD_GROUP_MODE:
*group = event->pad_group_mode.group;
*mode = event->pad_group_mode.mode;
break;
case GDK_PAD_BUTTON_PRESS:
case GDK_PAD_BUTTON_RELEASE:
*group = event->pad_button.group;
*mode = event->pad_button.mode;
break;
case GDK_PAD_RING:
case GDK_PAD_STRIP:
*group = event->pad_axis.group;
*mode = event->pad_axis.mode;
break;
default:
g_assert_not_reached ();
}
}
/**
* gdk_drag_event_get_drop:
* @event: a DND event
*
* Gets the #GdkDrop from a DND event.
*
* Returns: (transfer none) (nullable): the drop
**/
GdkDrop *
gdk_drag_event_get_drop (GdkEvent *event)
{
g_return_val_if_fail (event->any.type == GDK_DRAG_ENTER ||
event->any.type == GDK_DRAG_LEAVE ||
event->any.type == GDK_DRAG_MOTION ||
event->any.type == GDK_DROP_START, NULL);
return event->dnd.drop;
}
/**
* gdk_grab_broken_event_get_grab_surface:
* @event: 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)
{
g_return_val_if_fail (event->any.type == GDK_GRAB_BROKEN, NULL);
return event->grab_broken.grab_surface;
}
/**
* gdk_key_event_matches:
* @event: 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)
{
guint keycode;
GdkModifierType state;
GdkModifierType mask;
guint ev_keyval;
int layout;
int level;
GdkModifierType consumed_modifiers;
GdkModifierType shift_group_mask;
gboolean group_mod_is_accel_mod = FALSE;
g_return_val_if_fail (event->any.type == GDK_KEY_PRESS ||
event->any.type == GDK_KEY_RELEASE, GDK_KEY_MATCH_NONE);
keycode = event->key.keycode;
state = event->key.state & ~GDK_LOCK_MASK;
ev_keyval = event->key.translated[1].keyval;
layout = event->key.translated[1].layout;
level = event->key.translated[1].level;
consumed_modifiers = event->key.translated[1].consumed;
mask = GDK_CONTROL_MASK|GDK_SHIFT_MASK|GDK_ALT_MASK|
GDK_SUPER_MASK|GDK_HYPER_MASK|GDK_META_MASK;
/* 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: 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)
{
GdkModifierType mask;
guint key;
guint accel_key;
GdkModifierType accel_mods;
GdkModifierType consumed_modifiers;
g_return_val_if_fail (event->any.type == GDK_KEY_PRESS ||
event->any.type == GDK_KEY_RELEASE, FALSE);
mask = GDK_CONTROL_MASK|GDK_SHIFT_MASK|GDK_ALT_MASK|
GDK_SUPER_MASK|GDK_HYPER_MASK|GDK_META_MASK;
accel_key = event->key.translated[1].keyval;
accel_mods = event->key.state;
consumed_modifiers = event->key.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;
}