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gdk: Add touch event types and mask

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This commit introduces GDK_TOUCH_BEGIN/UPDATE/END/CANCEL
and a separate GdkEventTouch struct that they use. This
is closer to the touch event API of other platforms and
matches the xi2 events closely, too.
This commit is contained in:
Carlos Garnacho 2011-02-28 20:53:42 +01:00 committed by Matthias Clasen
parent a490d2ebda
commit 7f35708cee
5 changed files with 180 additions and 5 deletions
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1
docs/reference/gdk/gdk3-sections.txt
View File

@ -829,6 +829,7 @@ GdkEvent
GdkEventAny
GdkEventKey
GdkEventButton
GdkEventTouch
GdkEventScroll
GdkEventMotion
GdkEventExpose

92
gdk/gdkevents.c
View File

@ -457,6 +457,15 @@ gdk_event_new (GdkEventType type)
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.;
@ -585,6 +594,15 @@ gdk_event_copy (const GdkEvent *event)
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,
@ -663,7 +681,14 @@ gdk_event_free (GdkEvent *event)
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)
@ -724,6 +749,11 @@ gdk_event_get_time (const GdkEvent *event)
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_SCROLL:
return event->scroll.time;
case GDK_KEY_PRESS:
@ -799,7 +829,13 @@ gdk_event_get_state (const GdkEvent *event,
case GDK_2BUTTON_PRESS:
case GDK_3BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
*state = event->button.state;
*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_SCROLL:
*state = event->scroll.state;
@ -890,6 +926,13 @@ gdk_event_get_coords (const GdkEvent *event,
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;
@ -944,6 +987,13 @@ gdk_event_get_root_coords (const GdkEvent *event,
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;
@ -1184,7 +1234,7 @@ gdk_event_get_axis (const GdkEvent *event,
switch (event->type)
{
case GDK_MOTION_NOTIFY:
case GDK_MOTION_NOTIFY:
x = event->motion.x;
y = event->motion.y;
break;
@ -1197,6 +1247,13 @@ gdk_event_get_axis (const GdkEvent *event,
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;
@ -1220,6 +1277,14 @@ gdk_event_get_axis (const GdkEvent *event,
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;
@ -1265,6 +1330,12 @@ gdk_event_set_device (GdkEvent *event,
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;
@ -1310,6 +1381,11 @@ gdk_event_get_device (const GdkEvent *event)
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:
@ -1327,6 +1403,10 @@ gdk_event_get_device (const GdkEvent *event)
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:
@ -1726,6 +1806,12 @@ 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;
}

67
gdk/gdkevents.h
View File

@ -129,6 +129,7 @@ typedef struct _GdkEventExpose GdkEventExpose;
typedef struct _GdkEventVisibility GdkEventVisibility;
typedef struct _GdkEventMotion GdkEventMotion;
typedef struct _GdkEventButton GdkEventButton;
typedef struct _GdkEventTouch GdkEventTouch;
typedef struct _GdkEventScroll GdkEventScroll;
typedef struct _GdkEventKey GdkEventKey;
typedef struct _GdkEventFocus GdkEventFocus;
@ -264,6 +265,14 @@ typedef GdkFilterReturn (*GdkFilterFunc) (GdkXEvent *xevent,
* was added in 2.8.
* @GDK_DAMAGE: the content of the window has been changed. This event type
* was added in 2.14.
* @GDK_TOUCH_BEGIN: A new touch event sequence has just started. This event
* type was added in 3.4.
* @GDK_TOUCH_UPDATE: A touch event sequence has been updated. This event type
* was added in 3.4.
* @GDK_TOUCH_END: A touch event sequence has finished. This event type
* was added in 3.4.
* @GDK_TOUCH_CANCEL: A touch event sequence has been canceled. This event type
* was added in 3.4.
* @GDK_EVENT_LAST: marks the end of the GdkEventType enumeration. Added in 2.18
*
* Specifies the type of the event.
@ -311,6 +320,10 @@ typedef enum
GDK_OWNER_CHANGE = 34,
GDK_GRAB_BROKEN = 35,
GDK_DAMAGE = 36,
GDK_TOUCH_BEGIN = 37,
GDK_TOUCH_UPDATE = 38,
GDK_TOUCH_END = 39,
GDK_TOUCH_CANCEL = 40,
GDK_EVENT_LAST /* helper variable for decls */
} GdkEventType;
@ -598,7 +611,7 @@ struct _GdkEventMotion
*
* Used for button press and button release events. The
* @type field will be one of %GDK_BUTTON_PRESS,
* %GDK_2BUTTON_PRESS, %GDK_3BUTTON_PRESS, and %GDK_BUTTON_RELEASE.
* %GDK_2BUTTON_PRESS, %GDK_3BUTTON_PRESS or %GDK_BUTTON_RELEASE,
*
* Double and triple-clicks result in a sequence of events being received.
* For double-clicks the order of events will be:
@ -646,6 +659,57 @@ struct _GdkEventButton
gdouble x_root, y_root;
};
/**
* GdkEventTouch:
* @type: the type of the event (%GDK_TOUCH_BEGIN, %GDK_TOUCH_UPDATE,
* %GDK_TOUCH_END, %GDK_TOUCH_CANCEL)
* @window: the window which received the event
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>)
* @time: the time of the event in milliseconds.
* @x: the x coordinate of the pointer relative to the window
* @y: the y coordinate of the pointer relative to the window
* @axes: @x, @y translated to the axes of @device, or %NULL if @device is
* the mouse
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) and the pointer
* buttons. See #GdkModifierType
* @sequence: the event sequence that the event belongs to
* @emulating_pointer: whether the event should be used for emulating
* pointer event
* @device: the device where the event originated
* @x_root: the x coordinate of the pointer relative to the root of the
* screen
* @y_root: the y coordinate of the pointer relative to the root of the
* screen
*
* Used for touch events.
* @type field will be one of %GDK_TOUCH_BEGIN, %GDK_TOUCH_UPDATE,
* %GDK_TOUCH_END or %GDK_TOUCH_CANCEL.
*
* Touch events are grouped into sequences by means of the @sequence
* field, which can also be obtained with gdk_event_get_event_sequence().
* Each sequence begins with a %GDK_TOUCH_BEGIN event, followed by
* any number of %GDK_TOUCH_UPDATE events, and ends with a %GDK_TOUCH_END
* (or %GDK_TOUCH_CANCEL) event. With multitouch devices, there may be
* several active sequences at the same time.
*/
struct _GdkEventTouch
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
guint32 time;
gdouble x;
gdouble y;
gdouble *axes;
guint state;
GdkEventSequence *sequence;
gboolean emulating_pointer;
GdkDevice *device;
gdouble x_root, y_root;
};
/**
* GdkEventScroll:
* @type: the type of the event (%GDK_SCROLL).
@ -1074,6 +1138,7 @@ union _GdkEvent
GdkEventVisibility visibility;
GdkEventMotion motion;
GdkEventButton button;
GdkEventTouch touch;
GdkEventScroll scroll;
GdkEventKey key;
GdkEventCrossing crossing;

11
gdk/gdktypes.h
View File

@ -348,6 +348,7 @@ typedef enum
* @GDK_SUBSTRUCTURE_MASK: receive events about window configuration changes of
* child windows
* @GDK_SCROLL_MASK: receive scroll events
* @GDK_TOUCH_MASK: receive touch events
* @GDK_ALL_EVENTS_MASK: the combination of all the above event masks.
*
* A set of bit-flags to indicate which events a window is to receive.
@ -363,6 +364,13 @@ typedef enum
* some of which are marked as a hint (the is_hint member is %TRUE).
* To receive more motion events after a motion hint event, the application
* needs to asks for more, by calling gdk_event_request_motions().
*
* If %GDK_TOUCH_MASK is enabled, the window will receive touch events
* from touch-enabled devices. Those will come as sequences of #GdkEventTouch
* with type %GDK_TOUCH_UPDATE, enclosed by two events with
* type %GDK_TOUCH_BEGIN and %GDK_TOUCH_END (or %GDK_TOUCH_CANCEL).
* gdk_event_get_event_sequence() returns the event sequence for these
* events, so different sequences may be distinguished.
*/
typedef enum
{
@ -387,7 +395,8 @@ typedef enum
GDK_PROXIMITY_OUT_MASK = 1 << 19,
GDK_SUBSTRUCTURE_MASK = 1 << 20,
GDK_SCROLL_MASK = 1 << 21,
GDK_ALL_EVENTS_MASK = 0x3FFFFE
GDK_TOUCH_MASK = 1 << 22,
GDK_ALL_EVENTS_MASK = 0x7FFFFE
} GdkEventMask;
/**

14
gdk/gdkwindow.c
View File

@ -8121,6 +8121,10 @@ static const guint type_masks[] = {
0, /* GDK_OWNER_CHANGE = 34 */
0, /* GDK_GRAB_BROKEN = 35 */
0, /* GDK_DAMAGE = 36 */
GDK_TOUCH_MASK, /* GDK_TOUCH_BEGIN = 37 */
GDK_TOUCH_MASK, /* GDK_TOUCH_UPDATE = 38 */
GDK_TOUCH_MASK, /* GDK_TOUCH_END = 39 */
GDK_TOUCH_MASK /* GDK_TOUCH_CANCEL = 40 */
};
G_STATIC_ASSERT (G_N_ELEMENTS (type_masks) == GDK_EVENT_LAST);
@ -8235,6 +8239,16 @@ _gdk_make_event (GdkWindow *window,
event->button.state = the_state;
break;
case GDK_TOUCH_BEGIN:
case GDK_TOUCH_UPDATE:
case GDK_TOUCH_END:
case GDK_TOUCH_CANCEL:
event->touch.time = the_time;
event->touch.axes = NULL;
event->touch.state = the_state;
break;
case GDK_SCROLL:
event->scroll.time = the_time;
event->scroll.state = the_state;