forked from AuroraMiddleware/gtk
b736018843
It can be tricky to deal with both, so let's give an example of using both gdk_event_get_scroll_direction() and gdk_event_get_scroll_deltas(). Closes: #2048
2568 lines
63 KiB
C
2568 lines
63 KiB
C
/* 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 "gdkinternals.h"
|
||
#include "gdkdisplayprivate.h"
|
||
#include "gdkdndprivate.h"
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||
|
||
#include <string.h>
|
||
#include <math.h>
|
||
|
||
|
||
/**
|
||
* SECTION:events
|
||
* @Short_description: Functions for handling events from the window system
|
||
* @Title: Events
|
||
* @See_also: [Event Structures][gdk3-Event-Structures]
|
||
*
|
||
* This section describes functions dealing with events from the window
|
||
* system.
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||
*
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||
* In GTK+ applications the events are handled automatically in
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||
* gtk_main_do_event() and passed on to the appropriate widgets, so these
|
||
* functions are rarely needed. Though some of the fields in the
|
||
* [Event Structures][gdk3-Event-Structures] are useful.
|
||
*/
|
||
|
||
|
||
typedef struct _GdkIOClosure GdkIOClosure;
|
||
|
||
struct _GdkIOClosure
|
||
{
|
||
GDestroyNotify notify;
|
||
gpointer data;
|
||
};
|
||
|
||
/* Private variable declarations
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||
*/
|
||
|
||
static GdkEventFunc _gdk_event_func = NULL; /* Callback for events */
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||
static gpointer _gdk_event_data = NULL;
|
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static GDestroyNotify _gdk_event_notify = NULL;
|
||
|
||
void
|
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_gdk_event_emit (GdkEvent *event)
|
||
{
|
||
if (gdk_drag_context_handle_source_event (event))
|
||
return;
|
||
|
||
if (_gdk_event_func)
|
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(*_gdk_event_func) (event, _gdk_event_data);
|
||
|
||
if (gdk_drag_context_handle_dest_event (event))
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||
return;
|
||
}
|
||
|
||
/*********************************************
|
||
* 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 = display->queued_events;
|
||
while (tmp_list)
|
||
{
|
||
GdkEventPrivate *event = tmp_list->data;
|
||
|
||
if ((event->flags & GDK_EVENT_PENDING) == 0 &&
|
||
(!paused || (event->flags & GDK_EVENT_FLUSHED) != 0))
|
||
{
|
||
if (pending_motion)
|
||
return pending_motion;
|
||
|
||
if (event->event.type == GDK_MOTION_NOTIFY && (event->flags & GDK_EVENT_FLUSHED) == 0)
|
||
pending_motion = tmp_list;
|
||
else
|
||
return tmp_list;
|
||
}
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/**
|
||
* _gdk_event_queue_append:
|
||
* @display: a #GdkDisplay
|
||
* @event: Event to append.
|
||
*
|
||
* Appends an event onto the tail of the event queue.
|
||
*
|
||
* Returns: the newly appended list node.
|
||
**/
|
||
GList *
|
||
_gdk_event_queue_append (GdkDisplay *display,
|
||
GdkEvent *event)
|
||
{
|
||
display->queued_tail = g_list_append (display->queued_tail, event);
|
||
|
||
if (!display->queued_events)
|
||
display->queued_events = display->queued_tail;
|
||
else
|
||
display->queued_tail = display->queued_tail->next;
|
||
|
||
return display->queued_tail;
|
||
}
|
||
|
||
/**
|
||
* _gdk_event_queue_insert_after:
|
||
* @display: a #GdkDisplay
|
||
* @sibling: Append after this event.
|
||
* @event: Event to append.
|
||
*
|
||
* Appends an event after the specified event, or if it isn’t in
|
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* the queue, onto the tail of the event queue.
|
||
*
|
||
* Returns: the newly appended list node.
|
||
*
|
||
* Since: 2.16
|
||
*/
|
||
GList*
|
||
_gdk_event_queue_insert_after (GdkDisplay *display,
|
||
GdkEvent *sibling,
|
||
GdkEvent *event)
|
||
{
|
||
GList *prev = g_list_find (display->queued_events, sibling);
|
||
if (prev && prev->next)
|
||
{
|
||
display->queued_events = g_list_insert_before (display->queued_events, prev->next, event);
|
||
return prev->next;
|
||
}
|
||
else
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||
return _gdk_event_queue_append (display, event);
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||
}
|
||
|
||
/**
|
||
* _gdk_event_queue_insert_before:
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* @display: a #GdkDisplay
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* @sibling: Append before this event
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* @event: Event to prepend
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*
|
||
* Prepends an event before the specified event, or if it isn’t in
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* the queue, onto the head of the event queue.
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||
*
|
||
* Returns: the newly prepended list node.
|
||
*
|
||
* Since: 2.16
|
||
*/
|
||
GList*
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||
_gdk_event_queue_insert_before (GdkDisplay *display,
|
||
GdkEvent *sibling,
|
||
GdkEvent *event)
|
||
{
|
||
GList *next = g_list_find (display->queued_events, sibling);
|
||
if (next)
|
||
{
|
||
display->queued_events = g_list_insert_before (display->queued_events, next, event);
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return next->prev;
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||
}
|
||
else
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||
return _gdk_event_queue_append (display, event);
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||
}
|
||
|
||
|
||
/**
|
||
* _gdk_event_queue_remove_link:
|
||
* @display: a #GdkDisplay
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||
* @node: node to remove
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||
*
|
||
* Removes a specified list node from the event queue.
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||
**/
|
||
void
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_gdk_event_queue_remove_link (GdkDisplay *display,
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||
GList *node)
|
||
{
|
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if (node->prev)
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node->prev->next = node->next;
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else
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display->queued_events = node->next;
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||
|
||
if (node->next)
|
||
node->next->prev = node->prev;
|
||
else
|
||
display->queued_tail = node->prev;
|
||
}
|
||
|
||
/**
|
||
* _gdk_event_unqueue:
|
||
* @display: a #GdkDisplay
|
||
*
|
||
* Removes and returns the first event from the event
|
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* 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;
|
||
}
|
||
|
||
void
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||
_gdk_event_queue_handle_motion_compression (GdkDisplay *display)
|
||
{
|
||
GList *tmp_list;
|
||
GList *pending_motions = NULL;
|
||
GdkWindow *pending_motion_window = NULL;
|
||
GdkDevice *pending_motion_device = NULL;
|
||
|
||
/* If the last N events in the event queue are motion notify
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||
* events for the same window, drop all but the last */
|
||
|
||
tmp_list = display->queued_tail;
|
||
|
||
while (tmp_list)
|
||
{
|
||
GdkEventPrivate *event = tmp_list->data;
|
||
|
||
if (event->flags & GDK_EVENT_PENDING)
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||
break;
|
||
|
||
if (event->event.type != GDK_MOTION_NOTIFY)
|
||
break;
|
||
|
||
if (pending_motion_window != NULL &&
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||
pending_motion_window != event->event.motion.window)
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||
break;
|
||
|
||
if (pending_motion_device != NULL &&
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||
pending_motion_device != event->event.motion.device)
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||
break;
|
||
|
||
if (!event->event.motion.window->event_compression)
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||
break;
|
||
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||
pending_motion_window = event->event.motion.window;
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pending_motion_device = event->event.motion.device;
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||
pending_motions = tmp_list;
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||
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||
tmp_list = tmp_list->prev;
|
||
}
|
||
|
||
while (pending_motions && pending_motions->next != NULL)
|
||
{
|
||
GList *next = pending_motions->next;
|
||
gdk_event_free (pending_motions->data);
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||
display->queued_events = g_list_delete_link (display->queued_events,
|
||
pending_motions);
|
||
pending_motions = next;
|
||
}
|
||
|
||
if (pending_motions &&
|
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pending_motions == display->queued_events &&
|
||
pending_motions == display->queued_tail)
|
||
{
|
||
GdkFrameClock *clock = gdk_window_get_frame_clock (pending_motion_window);
|
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if (clock) /* might be NULL if window was destroyed */
|
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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; tmp_list; tmp_list = tmp_list->next)
|
||
{
|
||
GdkEventPrivate *event = tmp_list->data;
|
||
event->flags |= GDK_EVENT_FLUSHED;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gdk_event_handler_set:
|
||
* @func: the function to call to handle events from GDK.
|
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* @data: user data to pass to the function.
|
||
* @notify: the function to call when the handler function is removed, i.e. when
|
||
* gdk_event_handler_set() is called with another event handler.
|
||
*
|
||
* Sets the function to call to handle all events from GDK.
|
||
*
|
||
* Note that GTK+ uses this to install its own event handler, so it is
|
||
* usually not useful for GTK+ applications. (Although an application
|
||
* can call this function then call gtk_main_do_event() to pass
|
||
* events to GTK+.)
|
||
**/
|
||
void
|
||
gdk_event_handler_set (GdkEventFunc func,
|
||
gpointer data,
|
||
GDestroyNotify notify)
|
||
{
|
||
if (_gdk_event_notify)
|
||
(*_gdk_event_notify) (_gdk_event_data);
|
||
|
||
_gdk_event_func = func;
|
||
_gdk_event_data = data;
|
||
_gdk_event_notify = notify;
|
||
}
|
||
|
||
/**
|
||
* gdk_events_pending:
|
||
*
|
||
* Checks if any events are ready to be processed for any display.
|
||
*
|
||
* Returns: %TRUE if any events are pending.
|
||
*/
|
||
gboolean
|
||
gdk_events_pending (void)
|
||
{
|
||
GSList *list, *l;
|
||
gboolean pending;
|
||
|
||
pending = FALSE;
|
||
list = gdk_display_manager_list_displays (gdk_display_manager_get ());
|
||
for (l = list; l; l = l->next)
|
||
{
|
||
if (_gdk_event_queue_find_first (l->data))
|
||
{
|
||
pending = TRUE;
|
||
goto out;
|
||
}
|
||
}
|
||
|
||
for (l = list; l; l = l->next)
|
||
{
|
||
if (gdk_display_has_pending (l->data))
|
||
{
|
||
pending = TRUE;
|
||
goto out;
|
||
}
|
||
}
|
||
|
||
out:
|
||
g_slist_free (list);
|
||
|
||
return pending;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get:
|
||
*
|
||
* Checks all open displays for a #GdkEvent to process,to be processed
|
||
* on, fetching events from the windowing system if necessary.
|
||
* See gdk_display_get_event().
|
||
*
|
||
* Returns: (nullable): the next #GdkEvent to be processed, or %NULL
|
||
* if no events are pending. The returned #GdkEvent should be freed
|
||
* with gdk_event_free().
|
||
**/
|
||
GdkEvent*
|
||
gdk_event_get (void)
|
||
{
|
||
GSList *list, *l;
|
||
GdkEvent *event;
|
||
|
||
event = NULL;
|
||
list = gdk_display_manager_list_displays (gdk_display_manager_get ());
|
||
for (l = list; l; l = l->next)
|
||
{
|
||
event = gdk_display_get_event (l->data);
|
||
if (event)
|
||
break;
|
||
}
|
||
|
||
g_slist_free (list);
|
||
|
||
return event;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_peek:
|
||
*
|
||
* If there is an event waiting in the event queue of some open
|
||
* display, returns a copy of it. See gdk_display_peek_event().
|
||
*
|
||
* Returns: (nullable): a copy of the first #GdkEvent on some event
|
||
* queue, or %NULL if no events are in any queues. The returned
|
||
* #GdkEvent should be freed with gdk_event_free().
|
||
**/
|
||
GdkEvent*
|
||
gdk_event_peek (void)
|
||
{
|
||
GSList *list, *l;
|
||
GdkEvent *event;
|
||
|
||
event = NULL;
|
||
list = gdk_display_manager_list_displays (gdk_display_manager_get ());
|
||
for (l = list; l; l = l->next)
|
||
{
|
||
event = gdk_display_peek_event (l->data);
|
||
if (event)
|
||
break;
|
||
}
|
||
|
||
g_slist_free (list);
|
||
|
||
return event;
|
||
}
|
||
|
||
static GdkDisplay *
|
||
event_get_display (const GdkEvent *event)
|
||
{
|
||
if (event->any.window)
|
||
return gdk_window_get_display (event->any.window);
|
||
else
|
||
return gdk_display_get_default ();
|
||
}
|
||
|
||
/**
|
||
* gdk_event_put:
|
||
* @event: a #GdkEvent.
|
||
*
|
||
* Appends a copy of the given event onto the front of the event
|
||
* queue for event->any.window’s display, or the default event
|
||
* queue if event->any.window is %NULL. See gdk_display_put_event().
|
||
**/
|
||
void
|
||
gdk_event_put (const GdkEvent *event)
|
||
{
|
||
GdkDisplay *display;
|
||
|
||
g_return_if_fail (event != NULL);
|
||
|
||
display = event_get_display (event);
|
||
|
||
gdk_display_put_event (display, event);
|
||
}
|
||
|
||
static GHashTable *event_hash = NULL;
|
||
|
||
/**
|
||
* gdk_event_new:
|
||
* @type: a #GdkEventType
|
||
*
|
||
* Creates a new event of the given type. All fields are set to 0.
|
||
*
|
||
* Returns: a newly-allocated #GdkEvent. The returned #GdkEvent
|
||
* should be freed with gdk_event_free().
|
||
*
|
||
* Since: 2.2
|
||
**/
|
||
GdkEvent*
|
||
gdk_event_new (GdkEventType type)
|
||
{
|
||
GdkEventPrivate *new_private;
|
||
GdkEvent *new_event;
|
||
|
||
if (!event_hash)
|
||
event_hash = g_hash_table_new (g_direct_hash, NULL);
|
||
|
||
new_private = g_slice_new0 (GdkEventPrivate);
|
||
|
||
new_private->flags = 0;
|
||
new_private->screen = NULL;
|
||
|
||
g_hash_table_insert (event_hash, new_private, GUINT_TO_POINTER (1));
|
||
|
||
new_event = (GdkEvent *) new_private;
|
||
|
||
new_event->any.type = type;
|
||
|
||
/*
|
||
* Bytewise 0 initialization is reasonable for most of the
|
||
* current event types. Explicitely initialize double fields
|
||
* since I trust bytewise 0 == 0. less than for integers
|
||
* or pointers.
|
||
*/
|
||
switch (type)
|
||
{
|
||
case GDK_MOTION_NOTIFY:
|
||
new_event->motion.x = 0.;
|
||
new_event->motion.y = 0.;
|
||
new_event->motion.x_root = 0.;
|
||
new_event->motion.y_root = 0.;
|
||
break;
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_2BUTTON_PRESS:
|
||
case GDK_3BUTTON_PRESS:
|
||
case GDK_BUTTON_RELEASE:
|
||
new_event->button.x = 0.;
|
||
new_event->button.y = 0.;
|
||
new_event->button.x_root = 0.;
|
||
new_event->button.y_root = 0.;
|
||
break;
|
||
case GDK_TOUCH_BEGIN:
|
||
case GDK_TOUCH_UPDATE:
|
||
case GDK_TOUCH_END:
|
||
case GDK_TOUCH_CANCEL:
|
||
new_event->touch.x = 0.;
|
||
new_event->touch.y = 0.;
|
||
new_event->touch.x_root = 0.;
|
||
new_event->touch.y_root = 0.;
|
||
break;
|
||
case GDK_SCROLL:
|
||
new_event->scroll.x = 0.;
|
||
new_event->scroll.y = 0.;
|
||
new_event->scroll.x_root = 0.;
|
||
new_event->scroll.y_root = 0.;
|
||
new_event->scroll.delta_x = 0.;
|
||
new_event->scroll.delta_y = 0.;
|
||
new_event->scroll.is_stop = FALSE;
|
||
break;
|
||
case GDK_ENTER_NOTIFY:
|
||
case GDK_LEAVE_NOTIFY:
|
||
new_event->crossing.x = 0.;
|
||
new_event->crossing.y = 0.;
|
||
new_event->crossing.x_root = 0.;
|
||
new_event->crossing.y_root = 0.;
|
||
break;
|
||
case GDK_TOUCHPAD_SWIPE:
|
||
new_event->touchpad_swipe.x = 0;
|
||
new_event->touchpad_swipe.y = 0;
|
||
new_event->touchpad_swipe.dx = 0;
|
||
new_event->touchpad_swipe.dy = 0;
|
||
new_event->touchpad_swipe.x_root = 0;
|
||
new_event->touchpad_swipe.y_root = 0;
|
||
break;
|
||
case GDK_TOUCHPAD_PINCH:
|
||
new_event->touchpad_pinch.x = 0;
|
||
new_event->touchpad_pinch.y = 0;
|
||
new_event->touchpad_pinch.dx = 0;
|
||
new_event->touchpad_pinch.dy = 0;
|
||
new_event->touchpad_pinch.angle_delta = 0;
|
||
new_event->touchpad_pinch.scale = 0;
|
||
new_event->touchpad_pinch.x_root = 0;
|
||
new_event->touchpad_pinch.y_root = 0;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
return new_event;
|
||
}
|
||
|
||
static gboolean
|
||
gdk_event_is_allocated (const GdkEvent *event)
|
||
{
|
||
if (event_hash)
|
||
return g_hash_table_lookup (event_hash, event) != NULL;
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
void
|
||
gdk_event_set_pointer_emulated (GdkEvent *event,
|
||
gboolean emulated)
|
||
{
|
||
if (gdk_event_is_allocated (event))
|
||
{
|
||
GdkEventPrivate *private = (GdkEventPrivate *) event;
|
||
|
||
if (emulated)
|
||
private->flags |= GDK_EVENT_POINTER_EMULATED;
|
||
else
|
||
private->flags &= ~(GDK_EVENT_POINTER_EMULATED);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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
|
||
*
|
||
* Since: 3.22
|
||
*/
|
||
gboolean
|
||
gdk_event_get_pointer_emulated (GdkEvent *event)
|
||
{
|
||
if (gdk_event_is_allocated (event))
|
||
return (((GdkEventPrivate *) event)->flags & GDK_EVENT_POINTER_EMULATED) != 0;
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_copy:
|
||
* @event: a #GdkEvent
|
||
*
|
||
* Copies a #GdkEvent, copying or incrementing the reference count of the
|
||
* resources associated with it (e.g. #GdkWindow’s and strings).
|
||
*
|
||
* Returns: a copy of @event. The returned #GdkEvent should be freed with
|
||
* gdk_event_free().
|
||
**/
|
||
GdkEvent*
|
||
gdk_event_copy (const GdkEvent *event)
|
||
{
|
||
GdkEventPrivate *new_private;
|
||
GdkEvent *new_event;
|
||
|
||
g_return_val_if_fail (event != NULL, NULL);
|
||
|
||
new_event = gdk_event_new (GDK_NOTHING);
|
||
new_private = (GdkEventPrivate *)new_event;
|
||
|
||
*new_event = *event;
|
||
if (new_event->any.window)
|
||
g_object_ref (new_event->any.window);
|
||
|
||
if (gdk_event_is_allocated (event))
|
||
{
|
||
GdkEventPrivate *private = (GdkEventPrivate *)event;
|
||
|
||
new_private->screen = private->screen;
|
||
new_private->device = private->device ? g_object_ref (private->device) : NULL;
|
||
new_private->source_device = private->source_device ? g_object_ref (private->source_device) : NULL;
|
||
new_private->seat = private->seat;
|
||
new_private->tool = private->tool;
|
||
}
|
||
|
||
switch (event->any.type)
|
||
{
|
||
case GDK_KEY_PRESS:
|
||
case GDK_KEY_RELEASE:
|
||
new_event->key.string = g_strdup (event->key.string);
|
||
break;
|
||
|
||
case GDK_ENTER_NOTIFY:
|
||
case GDK_LEAVE_NOTIFY:
|
||
if (event->crossing.subwindow != NULL)
|
||
g_object_ref (event->crossing.subwindow);
|
||
break;
|
||
|
||
case GDK_DRAG_ENTER:
|
||
case GDK_DRAG_LEAVE:
|
||
case GDK_DRAG_MOTION:
|
||
case GDK_DRAG_STATUS:
|
||
case GDK_DROP_START:
|
||
case GDK_DROP_FINISHED:
|
||
g_object_ref (event->dnd.context);
|
||
break;
|
||
|
||
case GDK_EXPOSE:
|
||
case GDK_DAMAGE:
|
||
if (event->expose.region)
|
||
new_event->expose.region = cairo_region_copy (event->expose.region);
|
||
break;
|
||
|
||
case GDK_SETTING:
|
||
new_event->setting.name = g_strdup (new_event->setting.name);
|
||
break;
|
||
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_2BUTTON_PRESS:
|
||
case GDK_3BUTTON_PRESS:
|
||
case GDK_BUTTON_RELEASE:
|
||
if (event->button.axes)
|
||
new_event->button.axes = g_memdup (event->button.axes,
|
||
sizeof (gdouble) * gdk_device_get_n_axes (event->button.device));
|
||
break;
|
||
|
||
case GDK_TOUCH_BEGIN:
|
||
case GDK_TOUCH_UPDATE:
|
||
case GDK_TOUCH_END:
|
||
case GDK_TOUCH_CANCEL:
|
||
if (event->touch.axes)
|
||
new_event->touch.axes = g_memdup (event->touch.axes,
|
||
sizeof (gdouble) * gdk_device_get_n_axes (event->touch.device));
|
||
break;
|
||
|
||
case GDK_MOTION_NOTIFY:
|
||
if (event->motion.axes)
|
||
new_event->motion.axes = g_memdup (event->motion.axes,
|
||
sizeof (gdouble) * gdk_device_get_n_axes (event->motion.device));
|
||
break;
|
||
|
||
case GDK_OWNER_CHANGE:
|
||
new_event->owner_change.owner = event->owner_change.owner;
|
||
if (new_event->owner_change.owner)
|
||
g_object_ref (new_event->owner_change.owner);
|
||
break;
|
||
|
||
case GDK_SELECTION_CLEAR:
|
||
case GDK_SELECTION_NOTIFY:
|
||
case GDK_SELECTION_REQUEST:
|
||
new_event->selection.requestor = event->selection.requestor;
|
||
if (new_event->selection.requestor)
|
||
g_object_ref (new_event->selection.requestor);
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if (gdk_event_is_allocated (event))
|
||
_gdk_display_event_data_copy (event_get_display (event), event, new_event);
|
||
|
||
return new_event;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_free:
|
||
* @event: a #GdkEvent.
|
||
*
|
||
* Frees a #GdkEvent, freeing or decrementing any resources associated with it.
|
||
* Note that this function should only be called with events returned from
|
||
* functions such as gdk_event_peek(), gdk_event_get(), gdk_event_copy()
|
||
* and gdk_event_new().
|
||
**/
|
||
void
|
||
gdk_event_free (GdkEvent *event)
|
||
{
|
||
GdkEventPrivate *private;
|
||
GdkDisplay *display;
|
||
|
||
g_return_if_fail (event != NULL);
|
||
|
||
if (gdk_event_is_allocated (event))
|
||
{
|
||
private = (GdkEventPrivate *) event;
|
||
g_clear_object (&private->device);
|
||
g_clear_object (&private->source_device);
|
||
}
|
||
|
||
switch (event->any.type)
|
||
{
|
||
case GDK_KEY_PRESS:
|
||
case GDK_KEY_RELEASE:
|
||
g_free (event->key.string);
|
||
break;
|
||
|
||
case GDK_ENTER_NOTIFY:
|
||
case GDK_LEAVE_NOTIFY:
|
||
if (event->crossing.subwindow != NULL)
|
||
g_object_unref (event->crossing.subwindow);
|
||
break;
|
||
|
||
case GDK_DRAG_ENTER:
|
||
case GDK_DRAG_LEAVE:
|
||
case GDK_DRAG_MOTION:
|
||
case GDK_DRAG_STATUS:
|
||
case GDK_DROP_START:
|
||
case GDK_DROP_FINISHED:
|
||
if (event->dnd.context != NULL)
|
||
g_object_unref (event->dnd.context);
|
||
break;
|
||
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_2BUTTON_PRESS:
|
||
case GDK_3BUTTON_PRESS:
|
||
case GDK_BUTTON_RELEASE:
|
||
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_EXPOSE:
|
||
case GDK_DAMAGE:
|
||
if (event->expose.region)
|
||
cairo_region_destroy (event->expose.region);
|
||
break;
|
||
|
||
case GDK_MOTION_NOTIFY:
|
||
g_free (event->motion.axes);
|
||
break;
|
||
|
||
case GDK_SETTING:
|
||
g_free (event->setting.name);
|
||
break;
|
||
|
||
case GDK_OWNER_CHANGE:
|
||
if (event->owner_change.owner)
|
||
g_object_unref (event->owner_change.owner);
|
||
break;
|
||
|
||
case GDK_SELECTION_CLEAR:
|
||
case GDK_SELECTION_NOTIFY:
|
||
case GDK_SELECTION_REQUEST:
|
||
if (event->selection.requestor)
|
||
g_object_unref (event->selection.requestor);
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
display = event_get_display (event);
|
||
if (display)
|
||
_gdk_display_event_data_free (display, event);
|
||
|
||
if (event->any.window)
|
||
g_object_unref (event->any.window);
|
||
|
||
g_hash_table_remove (event_hash, event);
|
||
g_slice_free (GdkEventPrivate, (GdkEventPrivate*) event);
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_window:
|
||
* @event: a #GdkEvent
|
||
*
|
||
* Extracts the #GdkWindow associated with an event.
|
||
*
|
||
* Returns: (transfer none): The #GdkWindow associated with the event
|
||
*
|
||
* Since: 3.10
|
||
*/
|
||
GdkWindow *
|
||
gdk_event_get_window (const GdkEvent *event)
|
||
{
|
||
g_return_val_if_fail (event != NULL, NULL);
|
||
|
||
return event->any.window;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_time:
|
||
* @event: a #GdkEvent
|
||
*
|
||
* Returns the time stamp from @event, if there is one; otherwise
|
||
* returns #GDK_CURRENT_TIME. If @event is %NULL, returns #GDK_CURRENT_TIME.
|
||
*
|
||
* Returns: time stamp field from @event
|
||
**/
|
||
guint32
|
||
gdk_event_get_time (const GdkEvent *event)
|
||
{
|
||
if (event)
|
||
switch (event->type)
|
||
{
|
||
case GDK_MOTION_NOTIFY:
|
||
return event->motion.time;
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_2BUTTON_PRESS:
|
||
case GDK_3BUTTON_PRESS:
|
||
case GDK_BUTTON_RELEASE:
|
||
return event->button.time;
|
||
case GDK_TOUCH_BEGIN:
|
||
case GDK_TOUCH_UPDATE:
|
||
case GDK_TOUCH_END:
|
||
case GDK_TOUCH_CANCEL:
|
||
return event->touch.time;
|
||
case GDK_TOUCHPAD_SWIPE:
|
||
return event->touchpad_swipe.time;
|
||
case GDK_TOUCHPAD_PINCH:
|
||
return event->touchpad_pinch.time;
|
||
case GDK_SCROLL:
|
||
return event->scroll.time;
|
||
case GDK_KEY_PRESS:
|
||
case GDK_KEY_RELEASE:
|
||
return event->key.time;
|
||
case GDK_ENTER_NOTIFY:
|
||
case GDK_LEAVE_NOTIFY:
|
||
return event->crossing.time;
|
||
case GDK_PROPERTY_NOTIFY:
|
||
return event->property.time;
|
||
case GDK_SELECTION_CLEAR:
|
||
case GDK_SELECTION_REQUEST:
|
||
case GDK_SELECTION_NOTIFY:
|
||
return event->selection.time;
|
||
case GDK_PROXIMITY_IN:
|
||
case GDK_PROXIMITY_OUT:
|
||
return event->proximity.time;
|
||
case GDK_DRAG_ENTER:
|
||
case GDK_DRAG_LEAVE:
|
||
case GDK_DRAG_MOTION:
|
||
case GDK_DRAG_STATUS:
|
||
case GDK_DROP_START:
|
||
case GDK_DROP_FINISHED:
|
||
return event->dnd.time;
|
||
case GDK_PAD_BUTTON_PRESS:
|
||
case GDK_PAD_BUTTON_RELEASE:
|
||
return event->pad_button.time;
|
||
case GDK_PAD_RING:
|
||
case GDK_PAD_STRIP:
|
||
return event->pad_axis.time;
|
||
case GDK_PAD_GROUP_MODE:
|
||
return event->pad_group_mode.time;
|
||
case GDK_CLIENT_EVENT:
|
||
case GDK_VISIBILITY_NOTIFY:
|
||
case GDK_CONFIGURE:
|
||
case GDK_FOCUS_CHANGE:
|
||
case GDK_NOTHING:
|
||
case GDK_DAMAGE:
|
||
case GDK_DELETE:
|
||
case GDK_DESTROY:
|
||
case GDK_EXPOSE:
|
||
case GDK_MAP:
|
||
case GDK_UNMAP:
|
||
case GDK_WINDOW_STATE:
|
||
case GDK_SETTING:
|
||
case GDK_OWNER_CHANGE:
|
||
case GDK_GRAB_BROKEN:
|
||
case GDK_EVENT_LAST:
|
||
/* return current time */
|
||
break;
|
||
}
|
||
|
||
return GDK_CURRENT_TIME;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_state:
|
||
* @event: (allow-none): a #GdkEvent or %NULL
|
||
* @state: (out): return location for state
|
||
*
|
||
* If the event contains a “state” field, puts that field in @state. Otherwise
|
||
* stores an empty state (0). Returns %TRUE if there was a state field
|
||
* in the event. @event may be %NULL, in which case it’s treated
|
||
* as if the event had no state field.
|
||
*
|
||
* Returns: %TRUE if there was a state field in the event
|
||
**/
|
||
gboolean
|
||
gdk_event_get_state (const GdkEvent *event,
|
||
GdkModifierType *state)
|
||
{
|
||
g_return_val_if_fail (state != NULL, FALSE);
|
||
|
||
if (event)
|
||
switch (event->type)
|
||
{
|
||
case GDK_MOTION_NOTIFY:
|
||
*state = event->motion.state;
|
||
return TRUE;
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_2BUTTON_PRESS:
|
||
case GDK_3BUTTON_PRESS:
|
||
case GDK_BUTTON_RELEASE:
|
||
*state = event->button.state;
|
||
return TRUE;
|
||
case GDK_TOUCH_BEGIN:
|
||
case GDK_TOUCH_UPDATE:
|
||
case GDK_TOUCH_END:
|
||
case GDK_TOUCH_CANCEL:
|
||
*state = event->touch.state;
|
||
return TRUE;
|
||
case GDK_TOUCHPAD_SWIPE:
|
||
*state = event->touchpad_swipe.state;
|
||
return TRUE;
|
||
case GDK_TOUCHPAD_PINCH:
|
||
*state = event->touchpad_pinch.state;
|
||
return TRUE;
|
||
case GDK_SCROLL:
|
||
*state = event->scroll.state;
|
||
return TRUE;
|
||
case GDK_KEY_PRESS:
|
||
case GDK_KEY_RELEASE:
|
||
*state = event->key.state;
|
||
return TRUE;
|
||
case GDK_ENTER_NOTIFY:
|
||
case GDK_LEAVE_NOTIFY:
|
||
*state = event->crossing.state;
|
||
return TRUE;
|
||
case GDK_PROPERTY_NOTIFY:
|
||
case GDK_VISIBILITY_NOTIFY:
|
||
case GDK_CLIENT_EVENT:
|
||
case GDK_CONFIGURE:
|
||
case GDK_FOCUS_CHANGE:
|
||
case GDK_SELECTION_CLEAR:
|
||
case GDK_SELECTION_REQUEST:
|
||
case GDK_SELECTION_NOTIFY:
|
||
case GDK_PROXIMITY_IN:
|
||
case GDK_PROXIMITY_OUT:
|
||
case GDK_DAMAGE:
|
||
case GDK_DRAG_ENTER:
|
||
case GDK_DRAG_LEAVE:
|
||
case GDK_DRAG_MOTION:
|
||
case GDK_DRAG_STATUS:
|
||
case GDK_DROP_START:
|
||
case GDK_DROP_FINISHED:
|
||
case GDK_NOTHING:
|
||
case GDK_DELETE:
|
||
case GDK_DESTROY:
|
||
case GDK_EXPOSE:
|
||
case GDK_MAP:
|
||
case GDK_UNMAP:
|
||
case GDK_WINDOW_STATE:
|
||
case GDK_SETTING:
|
||
case GDK_OWNER_CHANGE:
|
||
case GDK_GRAB_BROKEN:
|
||
case GDK_PAD_BUTTON_PRESS:
|
||
case GDK_PAD_BUTTON_RELEASE:
|
||
case GDK_PAD_RING:
|
||
case GDK_PAD_STRIP:
|
||
case GDK_PAD_GROUP_MODE:
|
||
case GDK_EVENT_LAST:
|
||
/* no state field */
|
||
break;
|
||
}
|
||
|
||
*state = 0;
|
||
return FALSE;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_coords:
|
||
* @event: a #GdkEvent
|
||
* @x_win: (out) (optional): location to put event window x coordinate
|
||
* @y_win: (out) (optional): location to put event window y coordinate
|
||
*
|
||
* Extract the event window relative x/y coordinates from an event.
|
||
*
|
||
* Returns: %TRUE if the event delivered event window coordinates
|
||
**/
|
||
gboolean
|
||
gdk_event_get_coords (const GdkEvent *event,
|
||
gdouble *x_win,
|
||
gdouble *y_win)
|
||
{
|
||
gdouble x = 0, y = 0;
|
||
gboolean fetched = TRUE;
|
||
|
||
g_return_val_if_fail (event != NULL, FALSE);
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_CONFIGURE:
|
||
x = event->configure.x;
|
||
y = event->configure.y;
|
||
break;
|
||
case GDK_ENTER_NOTIFY:
|
||
case GDK_LEAVE_NOTIFY:
|
||
x = event->crossing.x;
|
||
y = event->crossing.y;
|
||
break;
|
||
case GDK_SCROLL:
|
||
x = event->scroll.x;
|
||
y = event->scroll.y;
|
||
break;
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_2BUTTON_PRESS:
|
||
case GDK_3BUTTON_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_MOTION_NOTIFY:
|
||
x = event->motion.x;
|
||
y = event->motion.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;
|
||
default:
|
||
fetched = FALSE;
|
||
break;
|
||
}
|
||
|
||
if (x_win)
|
||
*x_win = x;
|
||
if (y_win)
|
||
*y_win = y;
|
||
|
||
return fetched;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_root_coords:
|
||
* @event: a #GdkEvent
|
||
* @x_root: (out) (optional): location to put root window x coordinate
|
||
* @y_root: (out) (optional): location to put root window y coordinate
|
||
*
|
||
* Extract the root window relative x/y coordinates from an event.
|
||
*
|
||
* Returns: %TRUE if the event delivered root window coordinates
|
||
**/
|
||
gboolean
|
||
gdk_event_get_root_coords (const GdkEvent *event,
|
||
gdouble *x_root,
|
||
gdouble *y_root)
|
||
{
|
||
gdouble x = 0, y = 0;
|
||
gboolean fetched = TRUE;
|
||
|
||
g_return_val_if_fail (event != NULL, FALSE);
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_MOTION_NOTIFY:
|
||
x = event->motion.x_root;
|
||
y = event->motion.y_root;
|
||
break;
|
||
case GDK_SCROLL:
|
||
x = event->scroll.x_root;
|
||
y = event->scroll.y_root;
|
||
break;
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_2BUTTON_PRESS:
|
||
case GDK_3BUTTON_PRESS:
|
||
case GDK_BUTTON_RELEASE:
|
||
x = event->button.x_root;
|
||
y = event->button.y_root;
|
||
break;
|
||
case GDK_TOUCH_BEGIN:
|
||
case GDK_TOUCH_UPDATE:
|
||
case GDK_TOUCH_END:
|
||
case GDK_TOUCH_CANCEL:
|
||
x = event->touch.x_root;
|
||
y = event->touch.y_root;
|
||
break;
|
||
case GDK_ENTER_NOTIFY:
|
||
case GDK_LEAVE_NOTIFY:
|
||
x = event->crossing.x_root;
|
||
y = event->crossing.y_root;
|
||
break;
|
||
case GDK_DRAG_ENTER:
|
||
case GDK_DRAG_LEAVE:
|
||
case GDK_DRAG_MOTION:
|
||
case GDK_DRAG_STATUS:
|
||
case GDK_DROP_START:
|
||
case GDK_DROP_FINISHED:
|
||
x = event->dnd.x_root;
|
||
y = event->dnd.y_root;
|
||
break;
|
||
case GDK_TOUCHPAD_SWIPE:
|
||
x = event->touchpad_swipe.x_root;
|
||
y = event->touchpad_swipe.y_root;
|
||
break;
|
||
case GDK_TOUCHPAD_PINCH:
|
||
x = event->touchpad_pinch.x_root;
|
||
y = event->touchpad_pinch.y_root;
|
||
break;
|
||
default:
|
||
fetched = FALSE;
|
||
break;
|
||
}
|
||
|
||
if (x_root)
|
||
*x_root = x;
|
||
if (y_root)
|
||
*y_root = y;
|
||
|
||
return fetched;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_button:
|
||
* @event: a #GdkEvent
|
||
* @button: (out): location to store mouse button number
|
||
*
|
||
* Extract the button number from an event.
|
||
*
|
||
* Returns: %TRUE if the event delivered a button number
|
||
*
|
||
* Since: 3.2
|
||
**/
|
||
gboolean
|
||
gdk_event_get_button (const GdkEvent *event,
|
||
guint *button)
|
||
{
|
||
gboolean fetched = TRUE;
|
||
guint number = 0;
|
||
|
||
g_return_val_if_fail (event != NULL, FALSE);
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_2BUTTON_PRESS:
|
||
case GDK_3BUTTON_PRESS:
|
||
case GDK_BUTTON_RELEASE:
|
||
number = event->button.button;
|
||
break;
|
||
case GDK_PAD_BUTTON_PRESS:
|
||
case GDK_PAD_BUTTON_RELEASE:
|
||
number = event->pad_button.button;
|
||
break;
|
||
default:
|
||
fetched = FALSE;
|
||
break;
|
||
}
|
||
|
||
if (button)
|
||
*button = number;
|
||
|
||
return fetched;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_click_count:
|
||
* @event: a #GdkEvent
|
||
* @click_count: (out): location to store click count
|
||
*
|
||
* Extracts the click count from an event.
|
||
*
|
||
* Returns: %TRUE if the event delivered a click count
|
||
*
|
||
* Since: 3.2
|
||
*/
|
||
gboolean
|
||
gdk_event_get_click_count (const GdkEvent *event,
|
||
guint *click_count)
|
||
{
|
||
gboolean fetched = TRUE;
|
||
guint number = 0;
|
||
|
||
g_return_val_if_fail (event != NULL, FALSE);
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_BUTTON_RELEASE:
|
||
number = 1;
|
||
break;
|
||
case GDK_2BUTTON_PRESS:
|
||
number = 2;
|
||
break;
|
||
case GDK_3BUTTON_PRESS:
|
||
number = 3;
|
||
break;
|
||
default:
|
||
fetched = FALSE;
|
||
break;
|
||
}
|
||
|
||
if (click_count)
|
||
*click_count = number;
|
||
|
||
return fetched;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_keyval:
|
||
* @event: a #GdkEvent
|
||
* @keyval: (out): location to store the keyval
|
||
*
|
||
* Extracts the keyval from an event.
|
||
*
|
||
* Returns: %TRUE if the event delivered a key symbol
|
||
*
|
||
* Since: 3.2
|
||
*/
|
||
gboolean
|
||
gdk_event_get_keyval (const GdkEvent *event,
|
||
guint *keyval)
|
||
{
|
||
gboolean fetched = TRUE;
|
||
guint number = 0;
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_KEY_PRESS:
|
||
case GDK_KEY_RELEASE:
|
||
number = event->key.keyval;
|
||
break;
|
||
default:
|
||
fetched = FALSE;
|
||
break;
|
||
}
|
||
|
||
if (keyval)
|
||
*keyval = number;
|
||
|
||
return fetched;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_keycode:
|
||
* @event: a #GdkEvent
|
||
* @keycode: (out): location to store the keycode
|
||
*
|
||
* Extracts the hardware keycode from an event.
|
||
*
|
||
* Also see gdk_event_get_scancode().
|
||
*
|
||
* Returns: %TRUE if the event delivered a hardware keycode
|
||
*
|
||
* Since: 3.2
|
||
*/
|
||
gboolean
|
||
gdk_event_get_keycode (const GdkEvent *event,
|
||
guint16 *keycode)
|
||
{
|
||
gboolean fetched = TRUE;
|
||
guint16 number = 0;
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_KEY_PRESS:
|
||
case GDK_KEY_RELEASE:
|
||
number = event->key.hardware_keycode;
|
||
break;
|
||
default:
|
||
fetched = FALSE;
|
||
break;
|
||
}
|
||
|
||
if (keycode)
|
||
*keycode = number;
|
||
|
||
return fetched;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_scroll_direction:
|
||
* @event: a #GdkEvent
|
||
* @direction: (out): location to store the scroll direction
|
||
*
|
||
* Extracts the scroll direction from an event.
|
||
*
|
||
* If @event is not of type %GDK_SCROLL, the contents of @direction
|
||
* are undefined.
|
||
*
|
||
* If you wish to handle both discrete and smooth scrolling, you
|
||
* should check the return value of this function, or of
|
||
* gdk_event_get_scroll_deltas(); for instance:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* GdkScrollDirection direction;
|
||
* double vscroll_factor = 0.0;
|
||
* double x_scroll, y_scroll;
|
||
*
|
||
* if (gdk_event_get_scroll_direction (event, &direction))
|
||
* {
|
||
* // Handle discrete scrolling with a known constant delta;
|
||
* const double delta = 12.0;
|
||
*
|
||
* switch (direction)
|
||
* {
|
||
* case GDK_SCROLL_UP:
|
||
* vscroll_factor = -delta;
|
||
* break;
|
||
* case GDK_SCROLL_DOWN:
|
||
* vscroll_factor = delta;
|
||
* break;
|
||
* default:
|
||
* // no scrolling
|
||
* break;
|
||
* }
|
||
* }
|
||
* else if (gdk_event_get_scroll_deltas (event, &x_scroll, &y_scroll))
|
||
* {
|
||
* // Handle smooth scrolling directly
|
||
* vscroll_factor = y_scroll;
|
||
* }
|
||
* ]|
|
||
*
|
||
* Returns: %TRUE if the event delivered a scroll direction
|
||
* and %FALSE otherwise
|
||
*
|
||
* Since: 3.2
|
||
*/
|
||
gboolean
|
||
gdk_event_get_scroll_direction (const GdkEvent *event,
|
||
GdkScrollDirection *direction)
|
||
{
|
||
gboolean fetched = TRUE;
|
||
GdkScrollDirection dir = 0;
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_SCROLL:
|
||
if (event->scroll.direction == GDK_SCROLL_SMOOTH)
|
||
fetched = FALSE;
|
||
else
|
||
dir = event->scroll.direction;
|
||
break;
|
||
default:
|
||
fetched = FALSE;
|
||
break;
|
||
}
|
||
|
||
if (direction)
|
||
*direction = dir;
|
||
|
||
return fetched;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_scroll_deltas:
|
||
* @event: a #GdkEvent
|
||
* @delta_x: (out): return location for X delta
|
||
* @delta_y: (out): return location for Y delta
|
||
*
|
||
* Retrieves the scroll deltas from a #GdkEvent
|
||
*
|
||
* See also: gdk_event_get_scroll_direction()
|
||
*
|
||
* Returns: %TRUE if the event contains smooth scroll information
|
||
* and %FALSE otherwise
|
||
*
|
||
* Since: 3.4
|
||
**/
|
||
gboolean
|
||
gdk_event_get_scroll_deltas (const GdkEvent *event,
|
||
gdouble *delta_x,
|
||
gdouble *delta_y)
|
||
{
|
||
gboolean fetched = TRUE;
|
||
gdouble dx = 0.0;
|
||
gdouble dy = 0.0;
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_SCROLL:
|
||
if (event->scroll.direction == GDK_SCROLL_SMOOTH)
|
||
{
|
||
dx = event->scroll.delta_x;
|
||
dy = event->scroll.delta_y;
|
||
}
|
||
else
|
||
fetched = FALSE;
|
||
break;
|
||
default:
|
||
fetched = FALSE;
|
||
break;
|
||
}
|
||
|
||
if (delta_x)
|
||
*delta_x = dx;
|
||
|
||
if (delta_y)
|
||
*delta_y = dy;
|
||
|
||
return fetched;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_is_scroll_stop_event
|
||
* @event: a #GdkEvent
|
||
*
|
||
* 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 a delta of 0/0.
|
||
*
|
||
* Returns: %TRUE if the event is a scroll stop event
|
||
*
|
||
* Since: 3.20
|
||
*/
|
||
gboolean
|
||
gdk_event_is_scroll_stop_event (const GdkEvent *event)
|
||
{
|
||
return event->scroll.is_stop;
|
||
}
|
||
|
||
/**
|
||
* 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 (const GdkEvent *event,
|
||
GdkAxisUse axis_use,
|
||
gdouble *value)
|
||
{
|
||
gdouble *axes;
|
||
GdkDevice *device;
|
||
|
||
g_return_val_if_fail (event != NULL, FALSE);
|
||
|
||
if (axis_use == GDK_AXIS_X || axis_use == GDK_AXIS_Y)
|
||
{
|
||
gdouble x, y;
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_MOTION_NOTIFY:
|
||
x = event->motion.x;
|
||
y = event->motion.y;
|
||
break;
|
||
case GDK_SCROLL:
|
||
x = event->scroll.x;
|
||
y = event->scroll.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->type == GDK_BUTTON_PRESS ||
|
||
event->type == GDK_BUTTON_RELEASE)
|
||
{
|
||
device = event->button.device;
|
||
axes = event->button.axes;
|
||
}
|
||
else if (event->type == GDK_TOUCH_BEGIN ||
|
||
event->type == GDK_TOUCH_UPDATE ||
|
||
event->type == GDK_TOUCH_END ||
|
||
event->type == GDK_TOUCH_CANCEL)
|
||
{
|
||
device = event->touch.device;
|
||
axes = event->touch.axes;
|
||
}
|
||
else if (event->type == GDK_MOTION_NOTIFY)
|
||
{
|
||
device = event->motion.device;
|
||
axes = event->motion.axes;
|
||
}
|
||
else
|
||
return FALSE;
|
||
|
||
return gdk_device_get_axis (device, axes, axis_use, value);
|
||
}
|
||
|
||
/**
|
||
* gdk_event_set_device:
|
||
* @event: a #GdkEvent
|
||
* @device: a #GdkDevice
|
||
*
|
||
* Sets the device for @event to @device. The event must
|
||
* have been allocated by GTK+, for instance, by
|
||
* gdk_event_copy().
|
||
*
|
||
* Since: 3.0
|
||
**/
|
||
void
|
||
gdk_event_set_device (GdkEvent *event,
|
||
GdkDevice *device)
|
||
{
|
||
GdkEventPrivate *private;
|
||
|
||
g_return_if_fail (gdk_event_is_allocated (event));
|
||
|
||
private = (GdkEventPrivate *) event;
|
||
|
||
g_set_object (&private->device, device);
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_MOTION_NOTIFY:
|
||
event->motion.device = device;
|
||
break;
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_2BUTTON_PRESS:
|
||
case GDK_3BUTTON_PRESS:
|
||
case GDK_BUTTON_RELEASE:
|
||
event->button.device = device;
|
||
break;
|
||
case GDK_TOUCH_BEGIN:
|
||
case GDK_TOUCH_UPDATE:
|
||
case GDK_TOUCH_END:
|
||
case GDK_TOUCH_CANCEL:
|
||
event->touch.device = device;
|
||
break;
|
||
case GDK_SCROLL:
|
||
event->scroll.device = device;
|
||
break;
|
||
case GDK_PROXIMITY_IN:
|
||
case GDK_PROXIMITY_OUT:
|
||
event->proximity.device = device;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_device:
|
||
* @event: a #GdkEvent.
|
||
*
|
||
* If the event contains a “device” field, this function will return
|
||
* it, else it will return %NULL.
|
||
*
|
||
* Returns: (nullable) (transfer none): a #GdkDevice, or %NULL.
|
||
*
|
||
* Since: 3.0
|
||
**/
|
||
GdkDevice *
|
||
gdk_event_get_device (const GdkEvent *event)
|
||
{
|
||
g_return_val_if_fail (event != NULL, NULL);
|
||
|
||
if (gdk_event_is_allocated (event))
|
||
{
|
||
GdkEventPrivate *private = (GdkEventPrivate *) event;
|
||
|
||
if (private->device)
|
||
return private->device;
|
||
}
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_MOTION_NOTIFY:
|
||
return event->motion.device;
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_2BUTTON_PRESS:
|
||
case GDK_3BUTTON_PRESS:
|
||
case GDK_BUTTON_RELEASE:
|
||
return event->button.device;
|
||
case GDK_TOUCH_BEGIN:
|
||
case GDK_TOUCH_UPDATE:
|
||
case GDK_TOUCH_END:
|
||
case GDK_TOUCH_CANCEL:
|
||
return event->touch.device;
|
||
case GDK_SCROLL:
|
||
return event->scroll.device;
|
||
case GDK_PROXIMITY_IN:
|
||
case GDK_PROXIMITY_OUT:
|
||
return event->proximity.device;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
/* Fallback if event has no device set */
|
||
switch (event->type)
|
||
{
|
||
case GDK_MOTION_NOTIFY:
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_2BUTTON_PRESS:
|
||
case GDK_3BUTTON_PRESS:
|
||
case GDK_BUTTON_RELEASE:
|
||
case GDK_TOUCH_BEGIN:
|
||
case GDK_TOUCH_UPDATE:
|
||
case GDK_TOUCH_END:
|
||
case GDK_TOUCH_CANCEL:
|
||
case GDK_ENTER_NOTIFY:
|
||
case GDK_LEAVE_NOTIFY:
|
||
case GDK_FOCUS_CHANGE:
|
||
case GDK_PROXIMITY_IN:
|
||
case GDK_PROXIMITY_OUT:
|
||
case GDK_DRAG_ENTER:
|
||
case GDK_DRAG_LEAVE:
|
||
case GDK_DRAG_MOTION:
|
||
case GDK_DRAG_STATUS:
|
||
case GDK_DROP_START:
|
||
case GDK_DROP_FINISHED:
|
||
case GDK_SCROLL:
|
||
case GDK_GRAB_BROKEN:
|
||
case GDK_KEY_PRESS:
|
||
case GDK_KEY_RELEASE:
|
||
{
|
||
GdkDisplay *display;
|
||
GdkSeat *seat;
|
||
|
||
g_warning ("Event with type %d not holding a GdkDevice. "
|
||
"It is most likely synthesized outside Gdk/GTK+",
|
||
event->type);
|
||
|
||
display = gdk_window_get_display (event->any.window);
|
||
seat = gdk_display_get_default_seat (display);
|
||
|
||
if (event->type == GDK_KEY_PRESS ||
|
||
event->type == GDK_KEY_RELEASE)
|
||
return gdk_seat_get_keyboard (seat);
|
||
else
|
||
return gdk_seat_get_pointer (seat);
|
||
}
|
||
break;
|
||
default:
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gdk_event_set_source_device:
|
||
* @event: a #GdkEvent
|
||
* @device: a #GdkDevice
|
||
*
|
||
* Sets the slave device for @event to @device.
|
||
*
|
||
* The event must have been allocated by GTK+,
|
||
* for instance by gdk_event_copy().
|
||
*
|
||
* Since: 3.0
|
||
**/
|
||
void
|
||
gdk_event_set_source_device (GdkEvent *event,
|
||
GdkDevice *device)
|
||
{
|
||
GdkEventPrivate *private;
|
||
|
||
g_return_if_fail (gdk_event_is_allocated (event));
|
||
g_return_if_fail (GDK_IS_DEVICE (device));
|
||
|
||
private = (GdkEventPrivate *) event;
|
||
|
||
g_set_object (&private->source_device, device);
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_source_device:
|
||
* @event: a #GdkEvent
|
||
*
|
||
* This function returns the hardware (slave) #GdkDevice that has
|
||
* triggered the event, falling back to the virtual (master) device
|
||
* (as in gdk_event_get_device()) if the event wasn’t caused by
|
||
* interaction with a hardware device. This may happen for example
|
||
* in synthesized crossing events after a #GdkWindow 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.
|
||
*
|
||
* Since: 3.0
|
||
**/
|
||
GdkDevice *
|
||
gdk_event_get_source_device (const GdkEvent *event)
|
||
{
|
||
GdkEventPrivate *private;
|
||
|
||
g_return_val_if_fail (event != NULL, NULL);
|
||
|
||
if (!gdk_event_is_allocated (event))
|
||
return NULL;
|
||
|
||
private = (GdkEventPrivate *) event;
|
||
|
||
if (private->source_device)
|
||
return private->source_device;
|
||
|
||
/* Fallback to event device */
|
||
return gdk_event_get_device (event);
|
||
}
|
||
|
||
/**
|
||
* gdk_event_request_motions:
|
||
* @event: a valid #GdkEvent
|
||
*
|
||
* Request more motion notifies if @event is a motion notify hint event.
|
||
*
|
||
* This function should be used instead of gdk_window_get_pointer() to
|
||
* request further motion notifies, because it also works for extension
|
||
* events where motion notifies are provided for devices other than the
|
||
* core pointer. Coordinate extraction, processing and requesting more
|
||
* motion events from a %GDK_MOTION_NOTIFY event usually works like this:
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* {
|
||
* // motion_event handler
|
||
* x = motion_event->x;
|
||
* y = motion_event->y;
|
||
* // handle (x,y) motion
|
||
* gdk_event_request_motions (motion_event); // handles is_hint events
|
||
* }
|
||
* ]|
|
||
*
|
||
* Since: 2.12
|
||
**/
|
||
void
|
||
gdk_event_request_motions (const GdkEventMotion *event)
|
||
{
|
||
GdkDisplay *display;
|
||
|
||
g_return_if_fail (event != NULL);
|
||
|
||
if (event->type == GDK_MOTION_NOTIFY && event->is_hint)
|
||
{
|
||
gdk_device_get_state (event->device, event->window, NULL, NULL);
|
||
|
||
display = gdk_window_get_display (event->window);
|
||
_gdk_display_enable_motion_hints (display, event->device);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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. Additionally, if
|
||
* gdk_keymap_get_modifier_mask() returns a non-0 mask for
|
||
* %GDK_MODIFIER_INTENT_CONTEXT_MENU, then the left mouse button will
|
||
* also trigger a context menu if this modifier is pressed.
|
||
*
|
||
* 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.
|
||
*
|
||
* Since: 3.4
|
||
**/
|
||
gboolean
|
||
gdk_event_triggers_context_menu (const GdkEvent *event)
|
||
{
|
||
g_return_val_if_fail (event != NULL, FALSE);
|
||
|
||
if (event->type == GDK_BUTTON_PRESS)
|
||
{
|
||
const GdkEventButton *bevent = (const GdkEventButton *) event;
|
||
GdkDisplay *display;
|
||
GdkModifierType modifier;
|
||
|
||
g_return_val_if_fail (GDK_IS_WINDOW (bevent->window), FALSE);
|
||
|
||
if (bevent->button == GDK_BUTTON_SECONDARY &&
|
||
! (bevent->state & (GDK_BUTTON1_MASK | GDK_BUTTON2_MASK)))
|
||
return TRUE;
|
||
|
||
display = gdk_window_get_display (bevent->window);
|
||
|
||
modifier = gdk_keymap_get_modifier_mask (gdk_keymap_get_for_display (display),
|
||
GDK_MODIFIER_INTENT_CONTEXT_MENU);
|
||
|
||
if (modifier != 0 &&
|
||
bevent->button == GDK_BUTTON_PRIMARY &&
|
||
! (bevent->state & (GDK_BUTTON2_MASK | GDK_BUTTON3_MASK)) &&
|
||
(bevent->state & modifier))
|
||
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_coords (event1, &x1, &y1) ||
|
||
!gdk_event_get_coords (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.
|
||
*
|
||
* Since: 3.0
|
||
**/
|
||
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.
|
||
*
|
||
* Since: 3.0
|
||
**/
|
||
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.
|
||
*
|
||
* Since: 3.0
|
||
**/
|
||
gboolean
|
||
gdk_events_get_center (GdkEvent *event1,
|
||
GdkEvent *event2,
|
||
gdouble *x,
|
||
gdouble *y)
|
||
{
|
||
gdouble x1, x2, y1, y2;
|
||
|
||
if (!gdk_event_get_coords (event1, &x1, &y1) ||
|
||
!gdk_event_get_coords (event2, &x2, &y2))
|
||
return FALSE;
|
||
|
||
if (x)
|
||
*x = (x2 + x1) / 2;
|
||
|
||
if (y)
|
||
*y = (y2 + y1) / 2;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_set_screen:
|
||
* @event: a #GdkEvent
|
||
* @screen: a #GdkScreen
|
||
*
|
||
* Sets the screen for @event to @screen. The event must
|
||
* have been allocated by GTK+, for instance, by
|
||
* gdk_event_copy().
|
||
*
|
||
* Since: 2.2
|
||
**/
|
||
void
|
||
gdk_event_set_screen (GdkEvent *event,
|
||
GdkScreen *screen)
|
||
{
|
||
GdkEventPrivate *private;
|
||
|
||
g_return_if_fail (gdk_event_is_allocated (event));
|
||
|
||
private = (GdkEventPrivate *)event;
|
||
|
||
private->screen = screen;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_screen:
|
||
* @event: a #GdkEvent
|
||
*
|
||
* Returns the screen for the event. The screen is
|
||
* typically the screen for `event->any.window`, but
|
||
* for events such as mouse events, it is the screen
|
||
* where the pointer was when the event occurs -
|
||
* that is, the screen which has the root window
|
||
* to which `event->motion.x_root` and
|
||
* `event->motion.y_root` are relative.
|
||
*
|
||
* Returns: (transfer none): the screen for the event
|
||
*
|
||
* Since: 2.2
|
||
**/
|
||
GdkScreen *
|
||
gdk_event_get_screen (const GdkEvent *event)
|
||
{
|
||
if (gdk_event_is_allocated (event))
|
||
{
|
||
GdkEventPrivate *private = (GdkEventPrivate *)event;
|
||
|
||
if (private->screen)
|
||
return private->screen;
|
||
}
|
||
|
||
if (event->any.window)
|
||
return gdk_window_get_screen (event->any.window);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_event_sequence:
|
||
* @event: a #GdkEvent
|
||
*
|
||
* If @event if of type %GDK_TOUCH_BEGIN, %GDK_TOUCH_UPDATE,
|
||
* %GDK_TOUCH_END or %GDK_TOUCH_CANCEL, returns the #GdkEventSequence
|
||
* to which the event belongs. Otherwise, return %NULL.
|
||
*
|
||
* Returns: (transfer none): the event sequence that the event belongs to
|
||
*
|
||
* Since: 3.4
|
||
*/
|
||
GdkEventSequence *
|
||
gdk_event_get_event_sequence (const GdkEvent *event)
|
||
{
|
||
if (!event)
|
||
return NULL;
|
||
|
||
if (event->type == GDK_TOUCH_BEGIN ||
|
||
event->type == GDK_TOUCH_UPDATE ||
|
||
event->type == GDK_TOUCH_END ||
|
||
event->type == GDK_TOUCH_CANCEL)
|
||
return event->touch.sequence;
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/**
|
||
* gdk_set_show_events:
|
||
* @show_events: %TRUE to output event debugging information.
|
||
*
|
||
* Sets whether a trace of received events is output.
|
||
* Note that GTK+ must be compiled with debugging (that is,
|
||
* configured using the `--enable-debug` option)
|
||
* to use this option.
|
||
**/
|
||
void
|
||
gdk_set_show_events (gboolean show_events)
|
||
{
|
||
if (show_events)
|
||
_gdk_debug_flags |= GDK_DEBUG_EVENTS;
|
||
else
|
||
_gdk_debug_flags &= ~GDK_DEBUG_EVENTS;
|
||
}
|
||
|
||
/**
|
||
* gdk_get_show_events:
|
||
*
|
||
* Gets whether event debugging output is enabled.
|
||
*
|
||
* Returns: %TRUE if event debugging output is enabled.
|
||
**/
|
||
gboolean
|
||
gdk_get_show_events (void)
|
||
{
|
||
return (_gdk_debug_flags & GDK_DEBUG_EVENTS) != 0;
|
||
}
|
||
|
||
static void
|
||
gdk_synthesize_click (GdkDisplay *display,
|
||
GdkEvent *event,
|
||
gint nclicks)
|
||
{
|
||
GdkEvent *event_copy;
|
||
|
||
event_copy = gdk_event_copy (event);
|
||
event_copy->type = (nclicks == 2) ? GDK_2BUTTON_PRESS : GDK_3BUTTON_PRESS;
|
||
|
||
_gdk_event_queue_append (display, event_copy);
|
||
}
|
||
|
||
void
|
||
_gdk_event_button_generate (GdkDisplay *display,
|
||
GdkEvent *event)
|
||
{
|
||
GdkMultipleClickInfo *info;
|
||
GdkDevice *source_device;
|
||
|
||
g_return_if_fail (event->type == GDK_BUTTON_PRESS);
|
||
|
||
source_device = gdk_event_get_source_device (event);
|
||
info = g_hash_table_lookup (display->multiple_click_info, event->button.device);
|
||
|
||
if (G_UNLIKELY (!info))
|
||
{
|
||
info = g_new0 (GdkMultipleClickInfo, 1);
|
||
info->button_number[0] = info->button_number[1] = -1;
|
||
|
||
g_hash_table_insert (display->multiple_click_info,
|
||
event->button.device, info);
|
||
}
|
||
|
||
if ((event->button.time < (info->button_click_time[1] + 2 * display->double_click_time)) &&
|
||
(event->button.window == info->button_window[1]) &&
|
||
(event->button.button == info->button_number[1]) &&
|
||
(source_device == info->last_slave) &&
|
||
(ABS (event->button.x - info->button_x[1]) <= display->double_click_distance) &&
|
||
(ABS (event->button.y - info->button_y[1]) <= display->double_click_distance))
|
||
{
|
||
gdk_synthesize_click (display, event, 3);
|
||
|
||
info->button_click_time[1] = 0;
|
||
info->button_click_time[0] = 0;
|
||
info->button_window[1] = NULL;
|
||
info->button_window[0] = NULL;
|
||
info->button_number[1] = -1;
|
||
info->button_number[0] = -1;
|
||
info->button_x[0] = info->button_x[1] = 0;
|
||
info->button_y[0] = info->button_y[1] = 0;
|
||
info->last_slave = NULL;
|
||
}
|
||
else if ((event->button.time < (info->button_click_time[0] + display->double_click_time)) &&
|
||
(event->button.window == info->button_window[0]) &&
|
||
(event->button.button == info->button_number[0]) &&
|
||
(source_device == info->last_slave) &&
|
||
(ABS (event->button.x - info->button_x[0]) <= display->double_click_distance) &&
|
||
(ABS (event->button.y - info->button_y[0]) <= display->double_click_distance))
|
||
{
|
||
gdk_synthesize_click (display, event, 2);
|
||
|
||
info->button_click_time[1] = info->button_click_time[0];
|
||
info->button_click_time[0] = event->button.time;
|
||
info->button_window[1] = info->button_window[0];
|
||
info->button_window[0] = event->button.window;
|
||
info->button_number[1] = info->button_number[0];
|
||
info->button_number[0] = event->button.button;
|
||
info->button_x[1] = info->button_x[0];
|
||
info->button_x[0] = event->button.x;
|
||
info->button_y[1] = info->button_y[0];
|
||
info->button_y[0] = event->button.y;
|
||
info->last_slave = source_device;
|
||
}
|
||
else
|
||
{
|
||
info->button_click_time[1] = 0;
|
||
info->button_click_time[0] = event->button.time;
|
||
info->button_window[1] = NULL;
|
||
info->button_window[0] = event->button.window;
|
||
info->button_number[1] = -1;
|
||
info->button_number[0] = event->button.button;
|
||
info->button_x[1] = 0;
|
||
info->button_x[0] = event->button.x;
|
||
info->button_y[1] = 0;
|
||
info->button_y[0] = event->button.y;
|
||
info->last_slave = source_device;
|
||
}
|
||
}
|
||
|
||
static GList *
|
||
gdk_get_pending_window_state_event_link (GdkWindow *window)
|
||
{
|
||
GdkDisplay *display = gdk_window_get_display (window);
|
||
GList *tmp_list;
|
||
|
||
for (tmp_list = display->queued_events; tmp_list; tmp_list = tmp_list->next)
|
||
{
|
||
GdkEventPrivate *event = tmp_list->data;
|
||
|
||
if (event->event.type == GDK_WINDOW_STATE &&
|
||
event->event.window_state.window == window)
|
||
return tmp_list;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
void
|
||
_gdk_set_window_state (GdkWindow *window,
|
||
GdkWindowState new_state)
|
||
{
|
||
GdkDisplay *display = gdk_window_get_display (window);
|
||
GdkEvent temp_event;
|
||
GdkWindowState old;
|
||
GList *pending_event_link;
|
||
|
||
g_return_if_fail (window != NULL);
|
||
|
||
temp_event.window_state.window = window;
|
||
temp_event.window_state.type = GDK_WINDOW_STATE;
|
||
temp_event.window_state.send_event = FALSE;
|
||
temp_event.window_state.new_window_state = new_state;
|
||
|
||
if (temp_event.window_state.new_window_state == window->state)
|
||
return; /* No actual work to do, nothing changed. */
|
||
|
||
pending_event_link = gdk_get_pending_window_state_event_link (window);
|
||
if (pending_event_link)
|
||
{
|
||
old = window->old_state;
|
||
_gdk_event_queue_remove_link (display, pending_event_link);
|
||
gdk_event_free (pending_event_link->data);
|
||
g_list_free_1 (pending_event_link);
|
||
}
|
||
else
|
||
{
|
||
old = window->state;
|
||
window->old_state = old;
|
||
}
|
||
|
||
temp_event.window_state.changed_mask = new_state ^ old;
|
||
|
||
/* Actually update the field in GdkWindow, this is sort of an odd
|
||
* place to do it, but seems like the safest since it ensures we expose no
|
||
* inconsistent state to the user.
|
||
*/
|
||
|
||
window->state = new_state;
|
||
|
||
if (temp_event.window_state.changed_mask & GDK_WINDOW_STATE_WITHDRAWN)
|
||
_gdk_window_update_viewable (window);
|
||
|
||
/* We only really send the event to toplevels, since
|
||
* all the window states don't apply to non-toplevels.
|
||
* Non-toplevels do use the GDK_WINDOW_STATE_WITHDRAWN flag
|
||
* internally so we needed to update window->state.
|
||
*/
|
||
switch (window->window_type)
|
||
{
|
||
case GDK_WINDOW_TOPLEVEL:
|
||
case GDK_WINDOW_TEMP: /* ? */
|
||
gdk_display_put_event (display, &temp_event);
|
||
break;
|
||
case GDK_WINDOW_FOREIGN:
|
||
case GDK_WINDOW_ROOT:
|
||
case GDK_WINDOW_CHILD:
|
||
break;
|
||
}
|
||
}
|
||
|
||
void
|
||
gdk_synthesize_window_state (GdkWindow *window,
|
||
GdkWindowState unset_flags,
|
||
GdkWindowState set_flags)
|
||
{
|
||
g_return_if_fail (window != NULL);
|
||
|
||
_gdk_set_window_state (window, (window->state | set_flags) & ~unset_flags);
|
||
}
|
||
|
||
/**
|
||
* gdk_display_set_double_click_time:
|
||
* @display: a #GdkDisplay
|
||
* @msec: double click time in milliseconds (thousandths of a second)
|
||
*
|
||
* Sets the double click time (two clicks within this time interval
|
||
* count as a double click and result in a #GDK_2BUTTON_PRESS event).
|
||
* Applications should not set this, it is a global
|
||
* user-configured setting.
|
||
*
|
||
* Since: 2.2
|
||
**/
|
||
void
|
||
gdk_display_set_double_click_time (GdkDisplay *display,
|
||
guint msec)
|
||
{
|
||
display->double_click_time = msec;
|
||
}
|
||
|
||
/**
|
||
* gdk_set_double_click_time:
|
||
* @msec: double click time in milliseconds (thousandths of a second)
|
||
*
|
||
* Set the double click time for the default display. See
|
||
* gdk_display_set_double_click_time().
|
||
* See also gdk_display_set_double_click_distance().
|
||
* Applications should not set this, it is a
|
||
* global user-configured setting.
|
||
**/
|
||
void
|
||
gdk_set_double_click_time (guint msec)
|
||
{
|
||
gdk_display_set_double_click_time (gdk_display_get_default (), msec);
|
||
}
|
||
|
||
/**
|
||
* gdk_display_set_double_click_distance:
|
||
* @display: a #GdkDisplay
|
||
* @distance: distance in pixels
|
||
*
|
||
* Sets the double click distance (two clicks within this distance
|
||
* count as a double click and result in a #GDK_2BUTTON_PRESS event).
|
||
* See also gdk_display_set_double_click_time().
|
||
* Applications should not set this, it is a global
|
||
* user-configured setting.
|
||
*
|
||
* Since: 2.4
|
||
**/
|
||
void
|
||
gdk_display_set_double_click_distance (GdkDisplay *display,
|
||
guint distance)
|
||
{
|
||
display->double_click_distance = distance;
|
||
}
|
||
|
||
G_DEFINE_BOXED_TYPE (GdkEvent, gdk_event,
|
||
gdk_event_copy,
|
||
gdk_event_free)
|
||
|
||
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_setting_get:
|
||
* @name: the name of the setting.
|
||
* @value: location to store the value of the setting.
|
||
*
|
||
* Obtains a desktop-wide setting, such as the double-click time,
|
||
* for the default screen. See gdk_screen_get_setting().
|
||
*
|
||
* Returns: %TRUE if the setting existed and a value was stored
|
||
* in @value, %FALSE otherwise.
|
||
**/
|
||
gboolean
|
||
gdk_setting_get (const gchar *name,
|
||
GValue *value)
|
||
{
|
||
return gdk_screen_get_setting (gdk_screen_get_default (), name, value);
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_event_type:
|
||
* @event: a #GdkEvent
|
||
*
|
||
* Retrieves the type of the event.
|
||
*
|
||
* Returns: a #GdkEventType
|
||
*
|
||
* Since: 3.10
|
||
*/
|
||
GdkEventType
|
||
gdk_event_get_event_type (const GdkEvent *event)
|
||
{
|
||
g_return_val_if_fail (event != NULL, GDK_NOTHING);
|
||
|
||
return event->type;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_seat:
|
||
* @event: a #GdkEvent
|
||
*
|
||
* Returns the #GdkSeat this event was generated for.
|
||
*
|
||
* Returns: (transfer none): The #GdkSeat of this event
|
||
*
|
||
* Since: 3.20
|
||
**/
|
||
GdkSeat *
|
||
gdk_event_get_seat (const GdkEvent *event)
|
||
{
|
||
const GdkEventPrivate *priv;
|
||
|
||
if (!gdk_event_is_allocated (event))
|
||
return NULL;
|
||
|
||
priv = (const GdkEventPrivate *) event;
|
||
|
||
if (!priv->seat)
|
||
{
|
||
GdkDevice *device;
|
||
|
||
g_warning ("Event with type %d not holding a GdkSeat. "
|
||
"It is most likely synthesized outside Gdk/GTK+",
|
||
event->type);
|
||
|
||
device = gdk_event_get_device (event);
|
||
|
||
return device ? gdk_device_get_seat (device) : NULL;
|
||
}
|
||
|
||
return priv->seat;
|
||
}
|
||
|
||
void
|
||
gdk_event_set_seat (GdkEvent *event,
|
||
GdkSeat *seat)
|
||
{
|
||
GdkEventPrivate *priv;
|
||
|
||
if (gdk_event_is_allocated (event))
|
||
{
|
||
priv = (GdkEventPrivate *) event;
|
||
priv->seat = seat;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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 #GdkDeviceTool<!-- -->s 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
|
||
*
|
||
* Since: 3.22
|
||
**/
|
||
GdkDeviceTool *
|
||
gdk_event_get_device_tool (const GdkEvent *event)
|
||
{
|
||
GdkEventPrivate *private;
|
||
|
||
if (!gdk_event_is_allocated (event))
|
||
return NULL;
|
||
|
||
private = (GdkEventPrivate *) event;
|
||
return private->tool;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_set_device_tool:
|
||
* @event: a #GdkEvent
|
||
* @tool: (nullable): tool to set on the event, or %NULL
|
||
*
|
||
* Sets the device tool for this event, should be rarely used.
|
||
*
|
||
* Since: 3.22
|
||
**/
|
||
void
|
||
gdk_event_set_device_tool (GdkEvent *event,
|
||
GdkDeviceTool *tool)
|
||
{
|
||
GdkEventPrivate *private;
|
||
|
||
if (!gdk_event_is_allocated (event))
|
||
return;
|
||
|
||
private = (GdkEventPrivate *) event;
|
||
private->tool = tool;
|
||
}
|
||
|
||
void
|
||
gdk_event_set_scancode (GdkEvent *event,
|
||
guint16 scancode)
|
||
{
|
||
GdkEventPrivate *private = (GdkEventPrivate *) event;
|
||
|
||
private->key_scancode = scancode;
|
||
}
|
||
|
||
/**
|
||
* gdk_event_get_scancode:
|
||
* @event: a #GdkEvent
|
||
*
|
||
* Gets the keyboard low-level scancode of a key event.
|
||
*
|
||
* This is usually hardware_keycode. On Windows this is the high
|
||
* word of WM_KEY{DOWN,UP} lParam which contains the scancode and
|
||
* some extended flags.
|
||
*
|
||
* Returns: The associated keyboard scancode or 0
|
||
*
|
||
* Since: 3.22
|
||
**/
|
||
int
|
||
gdk_event_get_scancode (GdkEvent *event)
|
||
{
|
||
GdkEventPrivate *private;
|
||
|
||
if (!gdk_event_is_allocated (event))
|
||
return 0;
|
||
|
||
private = (GdkEventPrivate *) event;
|
||
return private->key_scancode;
|
||
}
|