event-controller: Implement rotate-controller on top of SugarTouchController
Signed-off-by: Carlos Garnacho <carlos@lanedo.com> Acked-by: Simon Schampijer <simon@laptop.org>
This commit is contained in:
Carlos Garnacho
Simon Schampijer
parent
1ba68fa120
commit
1fe3d4234d
@ -23,25 +23,14 @@
|
||||
#include "sugar-rotate-controller.h"
|
||||
|
||||
typedef struct _SugarRotateControllerPriv SugarRotateControllerPriv;
|
||||
typedef struct _SugarTouch SugarTouch;
|
||||
|
||||
enum {
|
||||
ANGLE_CHANGED,
|
||||
LAST_SIGNAL
|
||||
};
|
||||
|
||||
struct _SugarTouch
|
||||
{
|
||||
GdkEventSequence *sequence;
|
||||
gint x;
|
||||
gint y;
|
||||
guint set : 1;
|
||||
};
|
||||
|
||||
struct _SugarRotateControllerPriv
|
||||
{
|
||||
GdkDevice *device;
|
||||
SugarTouch touches[2];
|
||||
gdouble initial_angle;
|
||||
};
|
||||
|
||||
@ -49,7 +38,7 @@ static guint signals[LAST_SIGNAL] = { 0 };
|
||||
|
||||
G_DEFINE_TYPE (SugarRotateController,
|
||||
sugar_rotate_controller,
|
||||
SUGAR_TYPE_EVENT_CONTROLLER)
|
||||
SUGAR_TYPE_TOUCH_CONTROLLER)
|
||||
|
||||
static void
|
||||
sugar_rotate_controller_init (SugarRotateController *controller)
|
||||
@ -65,30 +54,13 @@ sugar_rotate_controller_finalize (GObject *object)
|
||||
G_OBJECT_CLASS (sugar_rotate_controller_parent_class)->finalize (object);
|
||||
}
|
||||
|
||||
static SugarTouch *
|
||||
_sugar_rotate_controller_find_touch (SugarRotateController *controller,
|
||||
GdkEventSequence *sequence)
|
||||
static void
|
||||
sugar_rotate_controller_constructed (GObject *object)
|
||||
{
|
||||
SugarRotateControllerPriv *priv;
|
||||
gint unset = -1, i;
|
||||
|
||||
priv = controller->_priv;
|
||||
|
||||
for (i = 0; i < 2; i++)
|
||||
{
|
||||
if (priv->touches[i].sequence == sequence)
|
||||
return &priv->touches[i];
|
||||
else if (!priv->touches[i].set && unset < 0)
|
||||
unset = i;
|
||||
}
|
||||
|
||||
if (unset < 0)
|
||||
return NULL;
|
||||
|
||||
priv->touches[unset].sequence = sequence;
|
||||
priv->touches[unset].set = TRUE;
|
||||
|
||||
return &priv->touches[unset];
|
||||
g_object_set (object,
|
||||
"min-touches", 2,
|
||||
"max-touches", 2,
|
||||
NULL);
|
||||
}
|
||||
|
||||
static gboolean
|
||||
@ -96,15 +68,24 @@ _sugar_rotate_controller_get_angle (SugarRotateController *controller,
|
||||
gdouble *angle)
|
||||
{
|
||||
SugarRotateControllerPriv *priv;
|
||||
gint x1, y1, x2, y2;
|
||||
gdouble dx, dy;
|
||||
GList *touches;
|
||||
|
||||
priv = controller->_priv;
|
||||
|
||||
if (!priv->touches[0].set || !priv->touches[1].set)
|
||||
if (sugar_touch_controller_get_num_touches (SUGAR_TOUCH_CONTROLLER (controller)) != 2)
|
||||
return FALSE;
|
||||
|
||||
dx = priv->touches[0].x - priv->touches[1].x;
|
||||
dy = priv->touches[0].y - priv->touches[1].y;
|
||||
touches = sugar_touch_controller_get_sequences (SUGAR_TOUCH_CONTROLLER (controller));
|
||||
|
||||
sugar_touch_controller_get_coords (SUGAR_TOUCH_CONTROLLER (controller),
|
||||
touches->data, &x1, &y1);
|
||||
sugar_touch_controller_get_coords (SUGAR_TOUCH_CONTROLLER (controller),
|
||||
touches->next->data, &x2, &y2);
|
||||
|
||||
dx = x1 - x2;
|
||||
dy = y1 - y2;
|
||||
|
||||
*angle = atan2 (dx, dy);
|
||||
|
||||
@ -133,115 +114,40 @@ _sugar_rotate_controller_check_emit (SugarRotateController *controller)
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
sugar_rotate_controller_handle_event (SugarEventController *controller,
|
||||
GdkEvent *event)
|
||||
{
|
||||
SugarRotateControllerPriv *priv;
|
||||
GdkEventSequence *sequence;
|
||||
gboolean handled = TRUE;
|
||||
GdkDevice *device;
|
||||
SugarTouch *touch;
|
||||
|
||||
priv = SUGAR_ROTATE_CONTROLLER (controller)->_priv;
|
||||
device = gdk_event_get_device (event);
|
||||
sequence = gdk_event_get_event_sequence (event);
|
||||
|
||||
if (priv->device && priv->device != device)
|
||||
return FALSE;
|
||||
|
||||
touch = _sugar_rotate_controller_find_touch (SUGAR_ROTATE_CONTROLLER (controller),
|
||||
sequence);
|
||||
if (!touch)
|
||||
return FALSE;
|
||||
|
||||
switch (event->type)
|
||||
{
|
||||
case GDK_TOUCH_BEGIN:
|
||||
touch->x = event->touch.x;
|
||||
touch->y = event->touch.y;
|
||||
|
||||
if (!priv->device)
|
||||
priv->device = g_object_ref (device);
|
||||
|
||||
if (priv->touches[0].set && priv->touches[1].set)
|
||||
{
|
||||
_sugar_rotate_controller_get_angle (SUGAR_ROTATE_CONTROLLER (controller),
|
||||
&priv->initial_angle);
|
||||
g_signal_emit_by_name (G_OBJECT (controller), "started");
|
||||
g_object_notify (G_OBJECT (controller), "state");
|
||||
}
|
||||
break;
|
||||
case GDK_TOUCH_END:
|
||||
touch->sequence = NULL;
|
||||
touch->set = FALSE;
|
||||
|
||||
if (!priv->touches[0].set && !priv->touches[1].set)
|
||||
{
|
||||
g_object_unref (priv->device);
|
||||
priv->device = NULL;
|
||||
}
|
||||
else if (priv->touches[0].set || priv->touches[1].set)
|
||||
{
|
||||
g_signal_emit_by_name (G_OBJECT (controller), "ended");
|
||||
g_object_notify (G_OBJECT (controller), "state");
|
||||
}
|
||||
break;
|
||||
case GDK_TOUCH_UPDATE:
|
||||
touch->x = event->touch.x;
|
||||
touch->y = event->touch.y;
|
||||
_sugar_rotate_controller_check_emit (SUGAR_ROTATE_CONTROLLER (controller));
|
||||
break;
|
||||
default:
|
||||
handled = FALSE;
|
||||
break;
|
||||
}
|
||||
|
||||
return handled;
|
||||
}
|
||||
|
||||
SugarEventControllerState
|
||||
sugar_rotate_controller_get_state (SugarEventController *controller)
|
||||
{
|
||||
SugarRotateControllerPriv *priv;
|
||||
gint num_touches;
|
||||
|
||||
priv = SUGAR_ROTATE_CONTROLLER (controller)->_priv;
|
||||
num_touches = sugar_touch_controller_get_num_touches (SUGAR_TOUCH_CONTROLLER (controller));
|
||||
|
||||
if (priv->device)
|
||||
{
|
||||
if (priv->touches[0].set && priv->touches[1].set)
|
||||
if (num_touches == 2)
|
||||
return SUGAR_EVENT_CONTROLLER_STATE_RECOGNIZED;
|
||||
else if (priv->touches[0].set || priv->touches[1].set)
|
||||
else if (num_touches == 1)
|
||||
return SUGAR_EVENT_CONTROLLER_STATE_COLLECTING;
|
||||
}
|
||||
|
||||
return SUGAR_EVENT_CONTROLLER_STATE_NONE;
|
||||
}
|
||||
|
||||
void
|
||||
sugar_rotate_controller_reset (SugarEventController *controller)
|
||||
sugar_rotate_controller_began (SugarEventController *controller)
|
||||
{
|
||||
SugarRotateControllerPriv *priv;
|
||||
|
||||
priv = SUGAR_ROTATE_CONTROLLER (controller)->_priv;
|
||||
|
||||
if (priv->touches[0].set && priv->touches[1].set)
|
||||
g_signal_emit_by_name (G_OBJECT (controller), "ended");
|
||||
|
||||
priv->touches[0].sequence = NULL;
|
||||
priv->touches[0].set = FALSE;
|
||||
priv->touches[1].sequence = NULL;
|
||||
priv->touches[1].set = FALSE;
|
||||
|
||||
if (priv->device)
|
||||
{
|
||||
g_object_unref (priv->device);
|
||||
priv->device = NULL;
|
||||
}
|
||||
|
||||
_sugar_rotate_controller_get_angle (SUGAR_ROTATE_CONTROLLER (controller),
|
||||
&priv->initial_angle);
|
||||
g_object_notify (G_OBJECT (controller), "state");
|
||||
}
|
||||
|
||||
void
|
||||
sugar_rotate_controller_updated (SugarEventController *controller)
|
||||
{
|
||||
_sugar_rotate_controller_check_emit (SUGAR_ROTATE_CONTROLLER (controller));
|
||||
}
|
||||
|
||||
static void
|
||||
sugar_rotate_controller_class_init (SugarRotateControllerClass *klass)
|
||||
{
|
||||
@ -250,17 +156,18 @@ sugar_rotate_controller_class_init (SugarRotateControllerClass *klass)
|
||||
|
||||
object_class = G_OBJECT_CLASS (klass);
|
||||
object_class->finalize = sugar_rotate_controller_finalize;
|
||||
object_class->constructed = sugar_rotate_controller_constructed;
|
||||
|
||||
controller_class = SUGAR_EVENT_CONTROLLER_CLASS (klass);
|
||||
controller_class->handle_event = sugar_rotate_controller_handle_event;
|
||||
controller_class->get_state = sugar_rotate_controller_get_state;
|
||||
controller_class->reset = sugar_rotate_controller_reset;
|
||||
controller_class->began = sugar_rotate_controller_began;
|
||||
controller_class->updated = sugar_rotate_controller_updated;
|
||||
|
||||
/**
|
||||
* SugarRotateController::angle-changed:
|
||||
* @controller: the object on which the signal is emitted
|
||||
* @angle: Current angle
|
||||
* @angle_delta: Difference with the starting angle
|
||||
* @angle: Current angle in radians
|
||||
* @angle_delta: Difference with the starting angle in radians
|
||||
*/
|
||||
signals[ANGLE_CHANGED] =
|
||||
g_signal_new ("angle-changed",
|
||||
@ -288,7 +195,7 @@ sugar_rotate_controller_new (void)
|
||||
*
|
||||
* If @controller is on state %SUGAR_EVENT_CONTROLLER_STATE_RECOGNIZED,
|
||||
* this function returns %TRUE and fills in @delta with the angle difference
|
||||
* since the gesture was first recognized.
|
||||
* in radians since the gesture was first recognized.
|
||||
*
|
||||
* Returns: %TRUE if @controller is recognizing a rotate gesture
|
||||
**/
|
||||
|
||||
@ -26,7 +26,7 @@
|
||||
#ifndef __SUGAR_ROTATE_CONTROLLER_H__
|
||||
#define __SUGAR_ROTATE_CONTROLLER_H__
|
||||
|
||||
#include "sugar-event-controller.h"
|
||||
#include "sugar-touch-controller.h"
|
||||
#include <gtk/gtk.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
@ -43,13 +43,13 @@ typedef struct _SugarRotateControllerClass SugarRotateControllerClass;
|
||||
|
||||
struct _SugarRotateController
|
||||
{
|
||||
SugarEventController parent_instance;
|
||||
SugarTouchController parent_instance;
|
||||
gpointer _priv;
|
||||
};
|
||||
|
||||
struct _SugarRotateControllerClass
|
||||
{
|
||||
SugarEventControllerClass parent_class;
|
||||
SugarTouchControllerClass parent_class;
|
||||
|
||||
void (* angle_changed) (SugarRotateController *controller,
|
||||
gdouble angle,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user