forked from AuroraMiddleware/gtk
771b3ea6f3
Instead of comparing two GtkWidget*s by casting the two GtkNative*s, we can as well compare two GtkNative*s. Also if gtk_widget_get_native() returns NULL, the code previously failed.
678 lines
19 KiB
C
678 lines
19 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2012, One Laptop Per Child.
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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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/**
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* SECTION:gtkeventcontroller
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* @Short_description: Self-contained handler of series of events
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* @Title: GtkEventController
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* @See_also: #GtkGesture
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*
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* #GtkEventController is a base, low-level implementation for event
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* controllers. Those react to a series of #GdkEvents, and possibly trigger
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* actions as a consequence of those.
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*/
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#include "config.h"
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#include "gtkeventcontroller.h"
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#include "gtkeventcontrollerprivate.h"
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#include "gtkwidgetprivate.h"
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#include "gtktypebuiltins.h"
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#include "gtkmarshalers.h"
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#include "gtkprivate.h"
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#include "gtkintl.h"
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#include "gtknative.h"
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typedef struct _GtkEventControllerPrivate GtkEventControllerPrivate;
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enum {
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PROP_WIDGET = 1,
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PROP_PROPAGATION_PHASE,
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PROP_PROPAGATION_LIMIT,
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PROP_NAME,
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LAST_PROP
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};
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static GParamSpec *properties[LAST_PROP] = { NULL, };
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struct _GtkEventControllerPrivate
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{
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GtkWidget *widget;
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GtkPropagationPhase phase;
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GtkPropagationLimit limit;
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char *name;
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GtkWidget *target;
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GdkEvent *event;
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};
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G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GtkEventController, gtk_event_controller, G_TYPE_OBJECT)
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static void
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gtk_event_controller_set_widget (GtkEventController *self,
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GtkWidget *widget)
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{
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GtkEventControllerPrivate *priv = gtk_event_controller_get_instance_private (self);
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priv->widget = widget;
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}
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static void
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gtk_event_controller_unset_widget (GtkEventController *self)
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{
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GtkEventControllerPrivate *priv = gtk_event_controller_get_instance_private (self);
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priv->widget = NULL;
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}
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static gboolean
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gtk_event_controller_filter_event_default (GtkEventController *self,
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GdkEvent *event)
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{
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return FALSE;
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}
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static gboolean
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gtk_event_controller_handle_event_default (GtkEventController *self,
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GdkEvent *event,
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double x,
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double y)
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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_event_controller_handle_crossing_default (GtkEventController *self,
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const GtkCrossingData *crossing,
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double x,
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double y)
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{
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}
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static void
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gtk_event_controller_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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GtkEventController *self = GTK_EVENT_CONTROLLER (object);
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GtkEventControllerPrivate *priv = gtk_event_controller_get_instance_private (self);
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switch (prop_id)
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{
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case PROP_PROPAGATION_PHASE:
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gtk_event_controller_set_propagation_phase (self,
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g_value_get_enum (value));
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break;
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case PROP_PROPAGATION_LIMIT:
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gtk_event_controller_set_propagation_limit (self,
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g_value_get_enum (value));
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break;
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case PROP_NAME:
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g_free (priv->name);
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priv->name = g_value_dup_string (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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}
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}
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static void
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gtk_event_controller_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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GtkEventController *self = GTK_EVENT_CONTROLLER (object);
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GtkEventControllerPrivate *priv = gtk_event_controller_get_instance_private (self);
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switch (prop_id)
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{
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case PROP_WIDGET:
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g_value_set_object (value, priv->widget);
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break;
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case PROP_PROPAGATION_PHASE:
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g_value_set_enum (value, priv->phase);
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break;
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case PROP_PROPAGATION_LIMIT:
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g_value_set_enum (value, priv->limit);
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break;
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case PROP_NAME:
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g_value_set_string (value, priv->name);
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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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}
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}
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static void
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gtk_event_controller_finalize (GObject *object)
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{
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GtkEventController *self = GTK_EVENT_CONTROLLER (object);
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GtkEventControllerPrivate *priv = gtk_event_controller_get_instance_private (self);
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g_free (priv->name);
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G_OBJECT_CLASS (gtk_event_controller_parent_class)->finalize (object);
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}
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static void
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gtk_event_controller_class_init (GtkEventControllerClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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klass->set_widget = gtk_event_controller_set_widget;
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klass->unset_widget = gtk_event_controller_unset_widget;
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klass->filter_event = gtk_event_controller_filter_event_default;
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klass->handle_event = gtk_event_controller_handle_event_default;
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klass->handle_crossing = gtk_event_controller_handle_crossing_default;
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object_class->finalize = gtk_event_controller_finalize;
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object_class->set_property = gtk_event_controller_set_property;
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object_class->get_property = gtk_event_controller_get_property;
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/**
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* GtkEventController:widget:
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*
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* The widget receiving the #GdkEvents that the controller will handle.
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*/
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properties[PROP_WIDGET] =
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g_param_spec_object ("widget",
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P_("Widget"),
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P_("Widget the gesture relates to"),
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GTK_TYPE_WIDGET,
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GTK_PARAM_READABLE);
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/**
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* GtkEventController:propagation-phase:
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*
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* The propagation phase at which this controller will handle events.
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*/
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properties[PROP_PROPAGATION_PHASE] =
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g_param_spec_enum ("propagation-phase",
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P_("Propagation phase"),
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P_("Propagation phase at which this controller is run"),
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GTK_TYPE_PROPAGATION_PHASE,
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GTK_PHASE_BUBBLE,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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/**
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* GtkEventController:propagation-limit:
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*
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* The limit for which events this controller will handle.
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*/
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properties[PROP_PROPAGATION_LIMIT] =
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g_param_spec_enum ("propagation-limit",
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P_("Propagation limit"),
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P_("Propagation limit for events handled by this controller"),
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GTK_TYPE_PROPAGATION_LIMIT,
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GTK_LIMIT_SAME_NATIVE,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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properties[PROP_NAME] =
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g_param_spec_string ("name",
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P_("Name"),
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P_("Name for this controller"),
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NULL,
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GTK_PARAM_READWRITE);
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g_object_class_install_properties (object_class, LAST_PROP, properties);
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}
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static void
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gtk_event_controller_init (GtkEventController *controller)
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{
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GtkEventControllerPrivate *priv;
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priv = gtk_event_controller_get_instance_private (controller);
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priv->phase = GTK_PHASE_BUBBLE;
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priv->limit = GTK_LIMIT_SAME_NATIVE;
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}
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static gboolean
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same_native (GtkWidget *widget,
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GtkWidget *target)
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{
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GtkNative *native;
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GtkNative *native2;
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if (!widget || !target)
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return TRUE;
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native = gtk_widget_get_native (widget);
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native2 = gtk_widget_get_native (target);
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return native == native2;
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}
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static gboolean
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gtk_event_controller_filter_event (GtkEventController *controller,
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GdkEvent *event,
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GtkWidget *target)
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{
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GtkEventControllerPrivate *priv;
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GtkEventControllerClass *controller_class;
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priv = gtk_event_controller_get_instance_private (controller);
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if (priv->widget && !gtk_widget_is_sensitive (priv->widget))
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return TRUE;
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if (priv->limit == GTK_LIMIT_SAME_NATIVE &&
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!same_native (priv->widget, target))
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return TRUE;
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controller_class = GTK_EVENT_CONTROLLER_GET_CLASS (controller);
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return controller_class->filter_event (controller, event);
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}
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static gboolean
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gtk_event_controller_filter_crossing (GtkEventController *controller,
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const GtkCrossingData *data)
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{
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GtkEventControllerPrivate *priv;
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priv = gtk_event_controller_get_instance_private (controller);
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if (priv->widget && !gtk_widget_is_sensitive (priv->widget))
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return TRUE;
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if (priv->limit == GTK_LIMIT_SAME_NATIVE &&
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(!same_native (priv->widget, data->old_target) ||
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!same_native (priv->widget, data->new_target)))
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return TRUE;
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return FALSE;
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}
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/**
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* gtk_event_controller_handle_event:
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* @controller: a #GtkEventController
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* @event: a #GdkEvent
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* @target: the target widget
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* @x: event position in widget coordinates, or 0 if not a pointer event
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* @y: event position in widget coordinates, or 0 if not a pointer event
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*
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* Feeds an event into @controller, so it can be interpreted
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* and the controller actions triggered.
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*
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* Returns: %TRUE if the event was potentially useful to trigger the
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* controller action
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**/
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gboolean
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gtk_event_controller_handle_event (GtkEventController *controller,
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GdkEvent *event,
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GtkWidget *target,
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double x,
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double y)
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{
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GtkEventControllerClass *controller_class;
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GtkEventControllerPrivate *priv;
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gboolean retval = FALSE;
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priv = gtk_event_controller_get_instance_private (controller);
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g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER (controller), FALSE);
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g_return_val_if_fail (event != NULL, FALSE);
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if (gtk_event_controller_filter_event (controller, event, target))
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return retval;
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controller_class = GTK_EVENT_CONTROLLER_GET_CLASS (controller);
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priv->target = g_object_ref (target);
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priv->event = gdk_event_ref (event);
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g_object_ref (controller);
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retval = controller_class->handle_event (controller, event, x, y);
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g_object_unref (controller);
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g_clear_object (&priv->target);
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g_clear_pointer (&priv->event, gdk_event_unref);
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return retval;
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}
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/**
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* gtk_event_controller_handle_crossing:
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* @controller: a #GtkEventController
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* @crossing: a #GtkCrossingData
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* @x: translated event coordinates
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* @y: translated event coordinates
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*
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* Feeds a crossing event into @controller, so it can be interpreted
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* and the controller actions triggered.
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**/
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void
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gtk_event_controller_handle_crossing (GtkEventController *controller,
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const GtkCrossingData *crossing,
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double x,
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double y)
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{
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GtkEventControllerClass *controller_class;
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g_return_if_fail (GTK_IS_EVENT_CONTROLLER (controller));
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g_return_if_fail (crossing != NULL);
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if (gtk_event_controller_filter_crossing (controller, crossing))
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return;
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controller_class = GTK_EVENT_CONTROLLER_GET_CLASS (controller);
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g_object_ref (controller);
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controller_class->handle_crossing (controller, crossing, x, y);
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g_object_unref (controller);
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}
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/**
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* gtk_event_controller_get_widget:
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* @controller: a #GtkEventController
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*
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* Returns the #GtkWidget this controller relates to.
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*
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* Returns: (transfer none): a #GtkWidget
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**/
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GtkWidget *
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gtk_event_controller_get_widget (GtkEventController *controller)
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{
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GtkEventControllerPrivate *priv;
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g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER (controller), 0);
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priv = gtk_event_controller_get_instance_private (controller);
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return priv->widget;
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}
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/**
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* gtk_event_controller_reset:
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* @controller: a #GtkEventController
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*
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* Resets the @controller to a clean state. Every interaction
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* the controller did through gtk_event_controll_handle_event()
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* will be dropped at this point.
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**/
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void
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gtk_event_controller_reset (GtkEventController *controller)
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{
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GtkEventControllerClass *controller_class;
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g_return_if_fail (GTK_IS_EVENT_CONTROLLER (controller));
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controller_class = GTK_EVENT_CONTROLLER_GET_CLASS (controller);
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if (controller_class->reset)
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controller_class->reset (controller);
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}
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/**
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* gtk_event_controller_get_propagation_phase:
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* @controller: a #GtkEventController
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*
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* Gets the propagation phase at which @controller handles events.
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*
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* Returns: the propagation phase
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**/
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GtkPropagationPhase
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gtk_event_controller_get_propagation_phase (GtkEventController *controller)
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{
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GtkEventControllerPrivate *priv;
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g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER (controller), GTK_PHASE_NONE);
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priv = gtk_event_controller_get_instance_private (controller);
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return priv->phase;
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}
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/**
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* gtk_event_controller_set_propagation_phase:
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* @controller: a #GtkEventController
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* @phase: a propagation phase
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*
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* Sets the propagation phase at which a controller handles events.
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*
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* If @phase is %GTK_PHASE_NONE, no automatic event handling will be
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* performed, but other additional gesture maintenance will. In that phase,
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* the events can be managed by calling gtk_event_controller_handle_event().
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**/
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void
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gtk_event_controller_set_propagation_phase (GtkEventController *controller,
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GtkPropagationPhase phase)
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{
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GtkEventControllerPrivate *priv;
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g_return_if_fail (GTK_IS_EVENT_CONTROLLER (controller));
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g_return_if_fail (phase >= GTK_PHASE_NONE && phase <= GTK_PHASE_TARGET);
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priv = gtk_event_controller_get_instance_private (controller);
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if (priv->phase == phase)
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return;
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priv->phase = phase;
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if (phase == GTK_PHASE_NONE)
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gtk_event_controller_reset (controller);
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g_object_notify_by_pspec (G_OBJECT (controller), properties[PROP_PROPAGATION_PHASE]);
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}
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/**
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* gtk_event_controller_get_propagation_limit:
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* @controller: a #GtkEventController
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*
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* Gets the propagation limit of the event controller.
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*
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* Returns: the propagation limit
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*/
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GtkPropagationLimit
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gtk_event_controller_get_propagation_limit (GtkEventController *controller)
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{
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GtkEventControllerPrivate *priv;
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g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER (controller), GTK_LIMIT_SAME_NATIVE);
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priv = gtk_event_controller_get_instance_private (controller);
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return priv->limit;
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}
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/**
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* gtk_event_controller_set_propagation_limit:
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* @controller: a #GtkEventController
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* @limit: the propagation limit
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*
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* Sets the event propagation limit on the event controller.
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*
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* If the limit is set to %@GTK_LIMIT_SAME_NATIVE, the controller
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* won't handle events that are targeted at widgets on a different
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* surface, such as popovers.
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*/
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void
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gtk_event_controller_set_propagation_limit (GtkEventController *controller,
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GtkPropagationLimit limit)
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{
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GtkEventControllerPrivate *priv;
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g_return_if_fail (GTK_IS_EVENT_CONTROLLER (controller));
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priv = gtk_event_controller_get_instance_private (controller);
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if (priv->limit == limit)
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return;
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priv->limit = limit;
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g_object_notify_by_pspec (G_OBJECT (controller), properties[PROP_PROPAGATION_LIMIT]);
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}
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/**
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* gtk_event_controller_get_name:
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* @controller: a #GtkEventController
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*
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* Gets the name of @controller.
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*/
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const char *
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gtk_event_controller_get_name (GtkEventController *controller)
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{
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GtkEventControllerPrivate *priv = gtk_event_controller_get_instance_private (controller);
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g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER (controller), NULL);
|
|
|
|
return priv->name;
|
|
}
|
|
|
|
/**
|
|
* gtk_event_controller_set_name:
|
|
* @controller: a #GtkEventController
|
|
* @name: a name for @controller
|
|
*
|
|
* Sets a name on the controller that can be used for
|
|
* debugging.
|
|
*/
|
|
void
|
|
gtk_event_controller_set_name (GtkEventController *controller,
|
|
const char *name)
|
|
{
|
|
GtkEventControllerPrivate *priv = gtk_event_controller_get_instance_private (controller);
|
|
|
|
g_return_if_fail (GTK_IS_EVENT_CONTROLLER (controller));
|
|
|
|
g_free (priv->name);
|
|
priv->name = g_strdup (name);
|
|
}
|
|
|
|
GtkWidget *
|
|
gtk_event_controller_get_target (GtkEventController *controller)
|
|
{
|
|
GtkEventControllerPrivate *priv = gtk_event_controller_get_instance_private (controller);
|
|
|
|
return priv->target;
|
|
}
|
|
|
|
/**
|
|
* gtk_event_controller_get_current_event:
|
|
* @controller: a #GtkEventController
|
|
*
|
|
* Returns the event that is currently being handled by the
|
|
* controller, and %NULL at other times.
|
|
*
|
|
* Returns: (nullable) (transfer none): the event is current handled by @controller
|
|
*/
|
|
GdkEvent *
|
|
gtk_event_controller_get_current_event (GtkEventController *controller)
|
|
{
|
|
GtkEventControllerPrivate *priv = gtk_event_controller_get_instance_private (controller);
|
|
|
|
return priv->event;
|
|
}
|
|
|
|
/**
|
|
* gtk_event_controller_get_current_event_time:
|
|
* @controller: a #GtkEventController
|
|
*
|
|
* Returns the timestamp of the event that is currently being
|
|
* handled by the controller, and 0 otherwise.
|
|
*
|
|
* Returns: timestamp of the event is current handled by @controller
|
|
*/
|
|
guint32
|
|
gtk_event_controller_get_current_event_time (GtkEventController *controller)
|
|
{
|
|
GtkEventControllerPrivate *priv = gtk_event_controller_get_instance_private (controller);
|
|
|
|
if (priv->event)
|
|
return gdk_event_get_time (priv->event);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gtk_event_controller_get_current_event_device:
|
|
* @controller: a #GtkEventController
|
|
*
|
|
* Returns the device of the event that is currently being
|
|
* handled by the controller, and %NULL otherwise.
|
|
*
|
|
* Returns: (nullable) (transfer none): device of the event is current handled by @controller
|
|
*/
|
|
GdkDevice *
|
|
gtk_event_controller_get_current_event_device (GtkEventController *controller)
|
|
{
|
|
GtkEventControllerPrivate *priv = gtk_event_controller_get_instance_private (controller);
|
|
|
|
if (priv->event)
|
|
return gdk_event_get_device (priv->event);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* gtk_event_controller_get_current_event_state:
|
|
* @controller: a #GtkEventController
|
|
*
|
|
* Returns the modifier state of the event that is currently being
|
|
* handled by the controller, and 0 otherwise.
|
|
*
|
|
* Returns: modifier state of the event is current handled by @controller
|
|
*/
|
|
GdkModifierType
|
|
gtk_event_controller_get_current_event_state (GtkEventController *controller)
|
|
{
|
|
GtkEventControllerPrivate *priv = gtk_event_controller_get_instance_private (controller);
|
|
|
|
if (priv->event)
|
|
return gdk_event_get_modifier_state (priv->event);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static GtkCrossingData *
|
|
gtk_crossing_data_copy (GtkCrossingData *crossing)
|
|
{
|
|
GtkCrossingData *copy;
|
|
|
|
copy = g_new (GtkCrossingData, 1);
|
|
|
|
copy->type = crossing->type;
|
|
copy->direction = crossing->direction;
|
|
|
|
if (crossing->old_target)
|
|
copy->old_target = g_object_ref (crossing->old_target);
|
|
if (crossing->new_target)
|
|
copy->new_target = g_object_ref (crossing->new_target);
|
|
|
|
return copy;
|
|
}
|
|
|
|
static void
|
|
gtk_crossing_data_free (GtkCrossingData *crossing)
|
|
{
|
|
g_clear_object (&crossing->old_target);
|
|
g_clear_object (&crossing->new_target);
|
|
|
|
g_free (crossing);
|
|
}
|
|
|
|
G_DEFINE_BOXED_TYPE (GtkCrossingData, gtk_crossing_data,
|
|
gtk_crossing_data_copy, gtk_crossing_data_free)
|