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/* GTK - The GIMP Toolkit
* Copyright (C) 2012 Red Hat, Inc.
*
* 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/>.
*/
#include "config.h"
#include "gdk.h"
#include "gtkpressandholdprivate.h"
#include "gtkintl.h"
#include "gtkprivate.h"
struct _GtkPressAndHoldPrivate
{
gint hold_time;
gint drag_threshold;
GdkEventSequence *sequence;
GdkDevice *device;
guint button;
guint timeout;
gint start_x;
gint start_y;
gint x;
gint y;
};
enum
{
PROP_ZERO,
PROP_HOLD_TIME,
PROP_DRAG_THRESHOLD
};
enum
{
HOLD,
TAP,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL];
G_DEFINE_TYPE_WITH_PRIVATE (GtkPressAndHold, gtk_press_and_hold, G_TYPE_OBJECT)
static void
gtk_press_and_hold_init (GtkPressAndHold *pah)
{
pah->priv = gtk_press_and_hold_get_instance_private (pah);
pah->priv->hold_time = 1000;
pah->priv->drag_threshold = 8;
}
static void
press_and_hold_finalize (GObject *object)
{
GtkPressAndHold *pah = GTK_PRESS_AND_HOLD (object);
if (pah->priv->timeout)
g_source_remove (pah->priv->timeout);
G_OBJECT_CLASS (gtk_press_and_hold_parent_class)->finalize (object);
}
static void
press_and_hold_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkPressAndHold *pah = GTK_PRESS_AND_HOLD (object);
switch (prop_id)
{
case PROP_HOLD_TIME:
g_value_set_int (value, pah->priv->hold_time);
break;
case PROP_DRAG_THRESHOLD:
g_value_set_int (value, pah->priv->drag_threshold);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
press_and_hold_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkPressAndHold *pah = GTK_PRESS_AND_HOLD (object);
switch (prop_id)
{
case PROP_HOLD_TIME:
pah->priv->hold_time = g_value_get_int (value);
break;
case PROP_DRAG_THRESHOLD:
pah->priv->hold_time = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_press_and_hold_class_init (GtkPressAndHoldClass *class)
{
GObjectClass *object_class = (GObjectClass *)class;
object_class->get_property = press_and_hold_get_property;
object_class->set_property = press_and_hold_set_property;
object_class->finalize = press_and_hold_finalize;
signals[HOLD] =
g_signal_new ("hold",
GTK_TYPE_PRESS_AND_HOLD,
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkPressAndHoldClass, hold),
NULL, NULL, NULL,
G_TYPE_NONE, 2, G_TYPE_INT, G_TYPE_INT);
signals[TAP] =
g_signal_new ("tap",
GTK_TYPE_PRESS_AND_HOLD,
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkPressAndHoldClass, tap),
NULL, NULL, NULL,
G_TYPE_NONE, 2, G_TYPE_INT, G_TYPE_INT);
g_object_class_install_property (object_class, PROP_HOLD_TIME,
g_param_spec_int ("hold-time", P_("Hold Time"), P_("Hold Time (in milliseconds)"),
0, G_MAXINT, 1000, GTK_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_DRAG_THRESHOLD,
g_param_spec_int ("drag-threshold", P_("Drag Threshold"), P_("Drag Threshold (in pixels)"),
1, G_MAXINT, 8, GTK_PARAM_READWRITE));
}
static void
press_and_hold_cancel (GtkPressAndHold *pah)
{
GtkPressAndHoldPrivate *priv = pah->priv;
if (priv->timeout)
g_source_remove (priv->timeout);
priv->timeout = 0;
priv->sequence = NULL;
priv->device = NULL;
priv->button = 0;
}
static gboolean
hold_action (gpointer data)
{
GtkPressAndHold *pah = data;
GtkPressAndHoldPrivate *priv = pah->priv;
press_and_hold_cancel (pah);
g_signal_emit (pah, signals[HOLD], 0, priv->x, priv->y);
return G_SOURCE_REMOVE;
}
void
gtk_press_and_hold_process_event (GtkPressAndHold *pah,
GdkEvent *event)
{
GtkPressAndHoldPrivate *priv = pah->priv;
/* We're already tracking a different input, ignore */
if ((event->type == GDK_TOUCH_BEGIN && priv->sequence != NULL) ||
(event->type == GDK_BUTTON_PRESS && priv->device != NULL) ||
(event->type == GDK_TOUCH_UPDATE && priv->sequence != event->touch.sequence) ||
(event->type == GDK_TOUCH_END && priv->sequence != event->touch.sequence) ||
(event->type == GDK_TOUCH_CANCEL && priv->sequence != event->touch.sequence) ||
(event->type == GDK_BUTTON_RELEASE && priv->device != event->button.device) ||
(event->type == GDK_BUTTON_RELEASE && priv->button != event->button.button) ||
(event->type == GDK_MOTION_NOTIFY && priv->device != event->motion.device))
return;
if (event->type == GDK_TOUCH_BEGIN)
{
priv->sequence = event->touch.sequence;
priv->x = event->touch.x;
priv->y = event->touch.y;
priv->start_x = priv->x;
priv->start_y = priv->y;
priv->timeout =
gdk_threads_add_timeout (priv->hold_time, hold_action, pah);
}
else if (event->type == GDK_TOUCH_UPDATE)
{
priv->x = event->touch.x;
priv->y = event->touch.y;
if (ABS (priv->x - priv->start_x) > priv->drag_threshold ||
ABS (priv->y - priv->start_y) > priv->drag_threshold)
press_and_hold_cancel (pah);
}
else if (event->type == GDK_TOUCH_END)
{
press_and_hold_cancel (pah);
g_signal_emit (pah, signals[TAP], 0, priv->x, priv->y);
}
else if (event->type == GDK_TOUCH_CANCEL)
{
press_and_hold_cancel (pah);
}
else if (event->type == GDK_BUTTON_PRESS)
{
priv->device = event->button.device;
priv->button = event->button.button;
priv->x = event->button.x;
priv->y = event->button.y;
priv->start_x = priv->x;
priv->start_y = priv->y;
priv->timeout =
gdk_threads_add_timeout (priv->hold_time, hold_action, pah);
}
else if (event->type == GDK_BUTTON_RELEASE)
{
press_and_hold_cancel (pah);
}
else if (event->type == GDK_MOTION_NOTIFY)
{
priv->x = event->motion.x;
priv->y = event->motion.y;
if (ABS (priv->x - priv->start_x) > priv->drag_threshold ||
ABS (priv->y - priv->start_y) > priv->drag_threshold)
press_and_hold_cancel (pah);
}
}
GtkPressAndHold *
gtk_press_and_hold_new (void)
{
return (GtkPressAndHold *) g_object_new (GTK_TYPE_PRESS_AND_HOLD, NULL);
}
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