forked from AuroraMiddleware/gtk
Add GtkGestureMultiPress
This gesture handles any number of clicks, ensuring multiple presses stay within thresholds and timeouts. When anything of that happens, the gesture is reset and press count starts from 1 again. Optionally, the gesture can be given a rectangle, used in in presses > 1 to ensure the consecutive presses happen on user imposed areas.
This commit is contained in:
Carlos Garnacho
parent
8026bc3651
commit
450c754c7c
@ -283,6 +283,7 @@ gtk_public_h_sources = \
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gtkgesture.h \
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gtkgesturedrag.h \
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gtkgesturelongpress.h \
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gtkgesturemultipress.h \
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gtkgesturerotate.h \
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gtkgestureswipe.h \
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gtkgesturezoom.h \
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@ -781,6 +782,7 @@ gtk_base_c_sources = \
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gtkgesture.c \
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gtkgesturedrag.c \
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gtkgesturelongpress.c \
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gtkgesturemultipress.c \
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gtkgesturerotate.c \
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gtkgestureswipe.c \
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gtkgesturezoom.c \
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@ -109,6 +109,7 @@
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#include <gtk/gtkgesture.h>
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#include <gtk/gtkgesturedrag.h>
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#include <gtk/gtkgesturelongpress.h>
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#include <gtk/gtkgesturemultipress.h>
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#include <gtk/gtkgesturerotate.h>
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#include <gtk/gtkgestureswipe.h>
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#include <gtk/gtkgesturezoom.h>
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472
gtk/gtkgesturemultipress.c
Normal file
472
gtk/gtkgesturemultipress.c
Normal file
@ -0,0 +1,472 @@
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/* GTK - The GIMP Toolkit
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* Copyright (C) 2014 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Author(s): Carlos Garnacho <carlosg@gnome.org>
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*/
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#include "config.h"
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#include "gtkgesturemultipress.h"
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#include "gtkprivate.h"
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#include "gtkintl.h"
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typedef struct _GtkGestureMultiPressPrivate GtkGestureMultiPressPrivate;
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struct _GtkGestureMultiPressPrivate
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{
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GdkRectangle rect;
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gdouble initial_press_x;
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gdouble initial_press_y;
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guint double_click_timeout_id;
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guint n_presses;
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guint button;
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guint current_button;
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guint rect_is_set : 1;
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};
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enum {
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PROP_BUTTON = 1
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};
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enum {
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PRESSED,
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STOPPED,
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LAST_SIGNAL
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};
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static guint signals[LAST_SIGNAL] = { 0 };
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G_DEFINE_TYPE_WITH_PRIVATE (GtkGestureMultiPress, gtk_gesture_multi_press, GTK_TYPE_GESTURE)
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static void
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gtk_gesture_multi_press_finalize (GObject *object)
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{
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GtkGestureMultiPressPrivate *priv;
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GtkGestureMultiPress *gesture;
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gesture = GTK_GESTURE_MULTI_PRESS (object);
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priv = gtk_gesture_multi_press_get_instance_private (gesture);
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if (priv->double_click_timeout_id)
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{
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g_source_remove (priv->double_click_timeout_id);
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priv->double_click_timeout_id = 0;
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}
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G_OBJECT_CLASS (gtk_gesture_multi_press_parent_class)->finalize (object);
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}
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static void
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gtk_gesture_multi_press_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkGestureMultiPress *gesture;
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gesture = GTK_GESTURE_MULTI_PRESS (object);
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switch (prop_id)
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{
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case PROP_BUTTON:
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gtk_gesture_multi_press_set_button (gesture,
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g_value_get_uint (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_gesture_multi_press_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkGestureMultiPressPrivate *priv;
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GtkGestureMultiPress *gesture;
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gesture = GTK_GESTURE_MULTI_PRESS (object);
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priv = gtk_gesture_multi_press_get_instance_private (gesture);
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switch (prop_id)
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{
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case PROP_BUTTON:
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g_value_set_uint (value, priv->button);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static gboolean
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gtk_gesture_multi_press_check (GtkGesture *gesture)
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{
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GtkGestureMultiPress *multi_press;
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GtkGestureMultiPressPrivate *priv;
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GList *sequences;
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gboolean active;
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multi_press = GTK_GESTURE_MULTI_PRESS (gesture);
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priv = gtk_gesture_multi_press_get_instance_private (multi_press);
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sequences = gtk_gesture_get_sequences (gesture);
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active = sequences || priv->double_click_timeout_id;
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g_list_free (sequences);
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return active;
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}
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static gboolean
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_double_click_timeout_cb (gpointer user_data)
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{
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GtkGestureMultiPress *gesture = user_data;
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GtkGestureMultiPressPrivate *priv;
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priv = gtk_gesture_multi_press_get_instance_private (gesture);
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priv->double_click_timeout_id = 0;
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gtk_gesture_multi_press_reset (gesture);
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return FALSE;
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}
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static void
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_gtk_gesture_multi_press_update_timeout (GtkGestureMultiPress *gesture)
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{
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GtkGestureMultiPressPrivate *priv;
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guint double_click_time;
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GtkSettings *settings;
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GtkWidget *widget;
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priv = gtk_gesture_multi_press_get_instance_private (gesture);
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if (priv->double_click_timeout_id)
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g_source_remove (priv->double_click_timeout_id);
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widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture));
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settings = gtk_widget_get_settings (widget);
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g_object_get (settings, "gtk-double-click-time", &double_click_time, NULL);
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priv->double_click_timeout_id =
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gdk_threads_add_timeout (double_click_time,
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_double_click_timeout_cb,
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gesture);
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}
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static gboolean
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_gtk_gesture_multi_press_check_within_threshold (GtkGestureMultiPress *gesture,
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gdouble x,
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gdouble y)
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{
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GtkGestureMultiPressPrivate *priv;
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guint double_click_distance;
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GtkSettings *settings;
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GtkWidget *widget;
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priv = gtk_gesture_multi_press_get_instance_private (gesture);
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if (priv->n_presses == 0)
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return TRUE;
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widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture));
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settings = gtk_widget_get_settings (widget);
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g_object_get (settings,
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"gtk-double-click-distance", &double_click_distance,
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NULL);
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if (ABS (priv->initial_press_x - x) < double_click_distance &&
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ABS (priv->initial_press_y - y) < double_click_distance)
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{
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if (!priv->rect_is_set ||
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(x >= priv->rect.x && x < priv->rect.x + priv->rect.width &&
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y >= priv->rect.y && y < priv->rect.y + priv->rect.height))
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return TRUE;
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}
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return FALSE;
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}
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static void
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gtk_gesture_multi_press_update (GtkGesture *gesture,
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GdkEventSequence *sequence)
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{
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GtkGestureMultiPress *multi_press;
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GtkGestureMultiPressPrivate *priv;
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guint n_presses, button = 1;
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const GdkEvent *event;
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gdouble x, y;
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multi_press = GTK_GESTURE_MULTI_PRESS (gesture);
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priv = gtk_gesture_multi_press_get_instance_private (multi_press);
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event = gtk_gesture_get_last_event (gesture, sequence);
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switch (event->type)
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{
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case GDK_BUTTON_PRESS:
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button = event->button.button;
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/* Fall through */
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case GDK_TOUCH_BEGIN:
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/* Ignore buttons we don't care about */
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if (priv->button != 0 && button != priv->button)
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break;
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/* Reset the gesture if the button number changes mid-recognition */
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if (priv->n_presses > 0 &&
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priv->current_button != button)
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gtk_gesture_multi_press_reset (multi_press);
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priv->current_button = button;
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_gtk_gesture_multi_press_update_timeout (multi_press);
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gtk_gesture_get_point (gesture, sequence, &x, &y);
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if (!_gtk_gesture_multi_press_check_within_threshold (multi_press, x, y))
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gtk_gesture_multi_press_reset (multi_press);
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/* Increment later the real counter, just if the gesture is
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* reset on the pressed handler */
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n_presses = priv->n_presses + 1;
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g_signal_emit (gesture, signals[PRESSED], 0, n_presses, TRUE, x, y);
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if (priv->n_presses == 0)
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{
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priv->initial_press_x = x;
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priv->initial_press_y = y;
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}
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priv->n_presses++;
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break;
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default:
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break;
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}
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}
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static void
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gtk_gesture_multi_press_class_init (GtkGestureMultiPressClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkGestureClass *gesture_class = GTK_GESTURE_CLASS (klass);
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object_class->finalize = gtk_gesture_multi_press_finalize;
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object_class->set_property = gtk_gesture_multi_press_set_property;
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object_class->get_property = gtk_gesture_multi_press_get_property;
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gesture_class->check = gtk_gesture_multi_press_check;
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gesture_class->begin = gtk_gesture_multi_press_update;
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gesture_class->update = gtk_gesture_multi_press_update;
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g_object_class_install_property (object_class,
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PROP_BUTTON,
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g_param_spec_uint ("button",
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P_("Button number"),
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P_("Button number to listen to"),
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0, G_MAXUINT, 0,
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GTK_PARAM_READWRITE));
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signals[PRESSED] =
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g_signal_new ("pressed",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GtkGestureMultiPressClass, pressed),
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NULL, NULL, NULL,
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G_TYPE_NONE, 4, G_TYPE_INT, G_TYPE_BOOLEAN,
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G_TYPE_DOUBLE, G_TYPE_DOUBLE);
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signals[STOPPED] =
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g_signal_new ("stopped",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GtkGestureMultiPressClass, stopped),
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NULL, NULL, NULL,
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G_TYPE_NONE, 0);
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}
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static void
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gtk_gesture_multi_press_init (GtkGestureMultiPress *gesture)
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{
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}
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/**
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* gtk_gesture_multi_press_new:
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* @widget: a #GtkWidget
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*
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* Returns a newly created #GtkGesture that recognizes single and multiple
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* presses.
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*
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* Returns: a newly created #GtkGestureMultiPress
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*
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* Since: 3.14
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**/
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GtkGesture *
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gtk_gesture_multi_press_new (GtkWidget *widget)
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{
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return g_object_new (GTK_TYPE_GESTURE_MULTI_PRESS,
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"widget", widget,
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NULL);
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}
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/**
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* gtk_gesture_multi_press_reset:
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* @gesture: a #GtkGestureMultiPress
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*
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* Resets the gesture, so the press count is reset to 0.
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*
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* Note: If this happens within a #GtkGestureMultiPress::pressed handler,
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* the button press being currently handled will still increment the press
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* counter, so a subsequent press would count as the second press.
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*
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* Since: 3.14
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**/
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void
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gtk_gesture_multi_press_reset (GtkGestureMultiPress *gesture)
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{
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GtkGestureMultiPressPrivate *priv;
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g_return_if_fail (GTK_IS_GESTURE (gesture));
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priv = gtk_gesture_multi_press_get_instance_private (gesture);
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if (priv->n_presses != 0)
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g_signal_emit (gesture, signals[STOPPED], 0);
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priv->current_button = 0;
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priv->n_presses = 0;
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gtk_gesture_check (GTK_GESTURE (gesture));
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}
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/**
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* gtk_gesture_multi_press_set_button:
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* @gesture: a #GtkGestureMultiPress
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* @button: button number to listen to, or 0 for any button
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*
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* Sets the button number @gesture listens to. If non-0, every
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* button press from a different button number will be ignored.
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* Touch events implicitly match with button 1.
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*
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* Since: 3.14
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**/
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void
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gtk_gesture_multi_press_set_button (GtkGestureMultiPress *gesture,
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guint button)
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{
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GtkGestureMultiPressPrivate *priv;
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g_return_if_fail (GTK_IS_GESTURE_MULTI_PRESS (gesture));
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priv = gtk_gesture_multi_press_get_instance_private (gesture);
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if (priv->button == button)
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return;
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priv->button = button;
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g_object_notify (G_OBJECT (gesture), "button");
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}
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/**
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* gtk_gesture_multi_press_get_button:
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* @gesture: a #GtkgestureMultiPress
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*
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* Returns the button number @gesture listens for, or 0 if @gesture
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* reacts to any button press.
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*
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* Returns: The button number, or 0 for any button.
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*
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* Since: 3.14
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**/
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guint
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gtk_gesture_multi_press_get_button (GtkGestureMultiPress *gesture)
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{
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GtkGestureMultiPressPrivate *priv;
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g_return_val_if_fail (GTK_IS_GESTURE_MULTI_PRESS (gesture), 0);
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priv = gtk_gesture_multi_press_get_instance_private (gesture);
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return priv->button;
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}
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/**
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* gtk_gesture_multi_press_set_area:
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* @gesture: a #GtkGesture
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* @rect: (allow-none): rectangle to receive coordinates on.
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*
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* If @rect is non-#NULL, the press area will be checked to be
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* confined within the rectangle, otherwise the button count
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* will be reset so the press is seen as being the first one.
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* If @rect is #NULL, the area will be reset to an unrestricted
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* state.
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*
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* Note: The rectangle is only used to determine whether any
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* non-first click falls within the expected area. This is not
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* akin to an input shape.
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*
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* Since: 3.14
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**/
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void
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gtk_gesture_multi_press_set_area (GtkGestureMultiPress *gesture,
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const GdkRectangle *rect)
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{
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GtkGestureMultiPressPrivate *priv;
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g_return_if_fail (GTK_IS_GESTURE_MULTI_PRESS (gesture));
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g_return_if_fail (rect != NULL);
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priv = gtk_gesture_multi_press_get_instance_private (gesture);
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if (!rect)
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priv->rect_is_set = FALSE;
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else
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{
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priv->rect_is_set = TRUE;
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priv->rect = *rect;
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}
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}
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/**
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* gtk_gesture_multi_press_get_area:
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* @gesture: a #GtkGestureMultiPress
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* @rect: (out): return location for the press area
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*
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* If an area was set through gtk_gesture_multi_press_set_area(),
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* this function will return #TRUE and fill in @rect with the
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* press area. See gtk_gesture_multi_press_set_area() for more
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* details on what the press area represents.
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*
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* Returns: 3.14
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**/
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gboolean
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gtk_gesture_multi_press_get_area (GtkGestureMultiPress *gesture,
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GdkRectangle *rect)
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{
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GtkGestureMultiPressPrivate *priv;
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|
||||
g_return_val_if_fail (GTK_IS_GESTURE_MULTI_PRESS (gesture), FALSE);
|
||||
|
||||
priv = gtk_gesture_multi_press_get_instance_private (gesture);
|
||||
|
||||
if (rect)
|
||||
{
|
||||
if (priv->rect_is_set)
|
||||
*rect = priv->rect;
|
||||
else
|
||||
{
|
||||
rect->x = rect->y = G_MININT;
|
||||
rect->width = rect->height = G_MAXINT;
|
||||
}
|
||||
}
|
||||
|
||||
return priv->rect_is_set;
|
||||
}
|
||||
85
gtk/gtkgesturemultipress.h
Normal file
85
gtk/gtkgesturemultipress.h
Normal file
@ -0,0 +1,85 @@
|
||||
/* GTK - The GIMP Toolkit
|
||||
* Copyright (C) 2014 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/>.
|
||||
*
|
||||
* Author(s): Carlos Garnacho <carlosg@gnome.org>
|
||||
*/
|
||||
#ifndef __GTK_GESTURE_MULTI_PRESS_H__
|
||||
#define __GTK_GESTURE_MULTI_PRESS_H__
|
||||
|
||||
#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
|
||||
#error "Only <gtk/gtk.h> can be included directly."
|
||||
#endif
|
||||
|
||||
#include <gtk/gtkwidget.h>
|
||||
#include <gtk/gtkgesture.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
#define GTK_TYPE_GESTURE_MULTI_PRESS (gtk_gesture_multi_press_get_type ())
|
||||
#define GTK_GESTURE_MULTI_PRESS(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), GTK_TYPE_GESTURE_MULTI_PRESS, GtkGestureMultiPress))
|
||||
#define GTK_GESTURE_MULTI_PRESS_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), GTK_TYPE_GESTURE_MULTI_PRESS, GtkGestureMultiPressClass))
|
||||
#define GTK_IS_GESTURE_MULTI_PRESS(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), GTK_TYPE_GESTURE_MULTI_PRESS))
|
||||
#define GTK_IS_GESTURE_MULTI_PRESS_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), GTK_TYPE_GESTURE_MULTI_PRESS))
|
||||
#define GTK_GESTURE_MULTI_PRESS_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), GTK_TYPE_GESTURE_MULTI_PRESS, GtkGestureMultiPressClass))
|
||||
|
||||
typedef struct _GtkGestureMultiPress GtkGestureMultiPress;
|
||||
typedef struct _GtkGestureMultiPressClass GtkGestureMultiPressClass;
|
||||
|
||||
struct _GtkGestureMultiPress
|
||||
{
|
||||
GtkGesture parent_instance;
|
||||
};
|
||||
|
||||
struct _GtkGestureMultiPressClass
|
||||
{
|
||||
GtkGestureClass parent_class;
|
||||
|
||||
gboolean (* pressed) (GtkGestureMultiPress *gesture,
|
||||
gint n_press,
|
||||
gboolean in_area,
|
||||
gdouble x,
|
||||
gdouble y);
|
||||
void (* stopped) (GtkGestureMultiPress *gesture);
|
||||
|
||||
/*<private>*/
|
||||
gpointer padding[10];
|
||||
};
|
||||
|
||||
GDK_AVAILABLE_IN_3_14
|
||||
GType gtk_gesture_multi_press_get_type (void) G_GNUC_CONST;
|
||||
|
||||
GDK_AVAILABLE_IN_3_14
|
||||
GtkGesture * gtk_gesture_multi_press_new (GtkWidget *widget);
|
||||
|
||||
GDK_AVAILABLE_IN_3_14
|
||||
void gtk_gesture_multi_press_reset (GtkGestureMultiPress *gesture);
|
||||
|
||||
GDK_AVAILABLE_IN_3_14
|
||||
void gtk_gesture_multi_press_set_button (GtkGestureMultiPress *gesture,
|
||||
guint button);
|
||||
GDK_AVAILABLE_IN_3_14
|
||||
guint gtk_gesture_multi_press_get_button (GtkGestureMultiPress *gesture);
|
||||
|
||||
GDK_AVAILABLE_IN_3_14
|
||||
void gtk_gesture_multi_press_set_area (GtkGestureMultiPress *gesture,
|
||||
const GdkRectangle *rect);
|
||||
GDK_AVAILABLE_IN_3_14
|
||||
gboolean gtk_gesture_multi_press_get_area (GtkGestureMultiPress *gesture,
|
||||
GdkRectangle *rect);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
#endif /* __GTK_GESTURE_MULTI_PRESS_H__ */
|
||||
Loading…
Reference in New Issue
Block a user