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Add GtkEventController

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This is a basic abstract type that handles GdkEvents.
This commit is contained in:
Carlos Garnacho 2013-01-17 20:55:24 +01:00
parent 6c49ffe916
commit e2b8ef8c66
4 changed files with 347 additions and 0 deletions
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2
gtk/Makefile.am
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@ -266,6 +266,7 @@ gtk_public_h_sources = \
gtkentrycompletion.h \
gtkenums.h \
gtkeventbox.h \
gtkeventcontroller.h \
gtkexpander.h \
gtkfilechooser.h \
gtkfilechooserbutton.h \
@ -750,6 +751,7 @@ gtk_base_c_sources = \
gtkentrybuffer.c \
gtkentrycompletion.c \
gtkeventbox.c \
gtkeventcontroller.c \
gtkexpander.c \
gtkfilechooser.c \
gtkfilechooserbutton.c \

1
gtk/gtk.h
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@ -92,6 +92,7 @@
#include <gtk/gtkentrycompletion.h>
#include <gtk/gtkenums.h>
#include <gtk/gtkeventbox.h>
#include <gtk/gtkeventcontroller.h>
#include <gtk/gtkexpander.h>
#include <gtk/gtkfixed.h>
#include <gtk/gtkfilechooser.h>

265
gtk/gtkeventcontroller.c Normal file
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@ -0,0 +1,265 @@
/* GTK - The GIMP Toolkit
* Copyright (C) 2012, One Laptop Per Child.
* 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>
*/
#include "config.h"
#include <gtk/gtkeventcontroller.h>
#include "gtkmarshalers.h"
#include "gtkprivate.h"
#include "gtkintl.h"
typedef struct _GtkEventControllerPrivate GtkEventControllerPrivate;
enum {
PROP_WIDGET = 1,
PROP_EVENT_MASK
};
enum {
HANDLE_EVENT,
RESET,
N_SIGNALS
};
struct _GtkEventControllerPrivate
{
GtkWidget *widget;
guint evmask;
};
guint signals[N_SIGNALS] = { 0 };
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GtkEventController, gtk_event_controller, G_TYPE_OBJECT)
static gboolean
gtk_event_controller_handle_event_default (GtkEventController *controller,
const GdkEvent *event)
{
return FALSE;
}
static void
gtk_event_controller_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkEventControllerPrivate *priv;
priv = gtk_event_controller_get_instance_private (GTK_EVENT_CONTROLLER (object));
switch (prop_id)
{
case PROP_WIDGET:
priv->widget = g_value_get_object (value);
break;
case PROP_EVENT_MASK:
priv->evmask = g_value_get_flags (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gtk_event_controller_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkEventControllerPrivate *priv;
priv = gtk_event_controller_get_instance_private (GTK_EVENT_CONTROLLER (object));
switch (prop_id)
{
case PROP_WIDGET:
g_value_set_object (value, priv->widget);
break;
case PROP_EVENT_MASK:
g_value_set_flags (value, priv->evmask);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gtk_event_controller_class_init (GtkEventControllerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
klass->handle_event = gtk_event_controller_handle_event_default;
object_class->set_property = gtk_event_controller_set_property;
object_class->get_property = gtk_event_controller_get_property;
g_object_class_install_property (object_class,
PROP_WIDGET,
g_param_spec_object ("widget",
P_("Widget"),
P_("Widget the gesture relates to"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class,
PROP_EVENT_MASK,
g_param_spec_flags ("event-mask",
P_("Event mask"),
P_("Event mask the controller handles"),
GDK_TYPE_EVENT_MASK, 0,
GTK_PARAM_READWRITE));
signals[HANDLE_EVENT] =
g_signal_new ("handle-event",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkEventControllerClass, handle_event),
g_signal_accumulator_true_handled, NULL, NULL,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
signals[RESET] =
g_signal_new ("reset",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkEventControllerClass, reset),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
}
static void
gtk_event_controller_init (GtkEventController *controller)
{
}
/**
* gtk_event_controller_handle_event:
* @controller: a #GtkEventController
* @event: a #GdkEvent
*
* Feeds an events into @controller, so it can be interpreted
* and the controller actions triggered.
*
* Returns: %TRUE if the event was potentially useful to trigger the
* controller action.
*
* Since: 3.14
**/
gboolean
gtk_event_controller_handle_event (GtkEventController *controller,
const GdkEvent *event)
{
gboolean retval = FALSE;
g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER (controller), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
g_signal_emit (controller, signals[HANDLE_EVENT], 0, event, &retval);
return retval;
}
/**
* gtk_event_controller_set_event_mask:
* @controller: a #GtkEventController
* @event_mask: mask for the events the controller handles
*
* Sets the event mask that the controller handles. This is only
* meant for #GtkEventController implementations and should not be
* called in applications.
*
* Since: 3.14
**/
void
gtk_event_controller_set_event_mask (GtkEventController *controller,
GdkEventMask event_mask)
{
GtkEventControllerPrivate *priv;
g_return_if_fail (GTK_IS_EVENT_CONTROLLER (controller));
priv = gtk_event_controller_get_instance_private (controller);
if (priv->evmask == event_mask)
return;
priv->evmask = event_mask;
g_object_notify (G_OBJECT (controller), "event-mask");
}
/**
* gtk_event_controller_get_event_mask:
* @controller: a #GtkEventController
*
* Returns the event mask necessary for the events handled by @controller.
*
* Returns: the controller event mask.
*
* Since: 3.14
**/
GdkEventMask
gtk_event_controller_get_event_mask (GtkEventController *controller)
{
GtkEventControllerPrivate *priv;
g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER (controller), 0);
priv = gtk_event_controller_get_instance_private (controller);
return priv->evmask;
}
/**
* gtk_event_controller_get_widget:
* @controller: a #GtkEventController
*
* Returns the #GtkWidget this controller relates to.
*
* Returns: a #GtkWidget
*
* Since: 3.14
**/
GtkWidget *
gtk_event_controller_get_widget (GtkEventController *controller)
{
GtkEventControllerPrivate *priv;
g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER (controller), 0);
priv = gtk_event_controller_get_instance_private (controller);
return priv->widget;
}
/**
* gtk_event_controller_reset:
* @controller: a #GtkEventController
*
* Resets the @controller to a clean state. Every interaction
* the controller did through #GtkEventController::handle-event
* will be dropped at this point.
*
* Since: 3.14
**/
void
gtk_event_controller_reset (GtkEventController *controller)
{
g_return_if_fail (GTK_IS_EVENT_CONTROLLER (controller));
g_signal_emit (controller, signals[RESET], 0);
}

79
gtk/gtkeventcontroller.h Normal file
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@ -0,0 +1,79 @@
/* GTK - The GIMP Toolkit
* Copyright (C) 2012, One Laptop Per Child.
* 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_EVENT_CONTROLLER_H__
#define __GTK_EVENT_CONTROLLER_H__
#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
#error "Only <gtk/gtk.h> can be included directly."
#endif
typedef struct _GtkEventController GtkEventController;
typedef struct _GtkEventControllerClass GtkEventControllerClass;
#include <gdk/gdk.h>
#include <gtk/gtktypes.h>
G_BEGIN_DECLS
#define GTK_TYPE_EVENT_CONTROLLER (gtk_event_controller_get_type ())
#define GTK_EVENT_CONTROLLER(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), GTK_TYPE_EVENT_CONTROLLER, GtkEventController))
#define GTK_EVENT_CONTROLLER_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), GTK_TYPE_EVENT_CONTROLLER, GtkEventControllerClass))
#define GTK_IS_EVENT_CONTROLLER(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), GTK_TYPE_EVENT_CONTROLLER))
#define GTK_IS_EVENT_CONTROLLER_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), GTK_TYPE_EVENT_CONTROLLER))
#define GTK_EVENT_CONTROLLER_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), GTK_TYPE_EVENT_CONTROLLER, GtkEventControllerClass))
struct _GtkEventController
{
GObject parent_instance;
};
struct _GtkEventControllerClass
{
GObjectClass parent_class;
gboolean (* handle_event) (GtkEventController *controller,
const GdkEvent *event);
void (* reset) (GtkEventController *controller);
/*<private>*/
gpointer padding[10];
};
GDK_AVAILABLE_IN_3_14
GType gtk_event_controller_get_type (void) G_GNUC_CONST;
GDK_AVAILABLE_IN_3_14
GtkWidget * gtk_event_controller_get_widget (GtkEventController *controller);
GDK_AVAILABLE_IN_3_14
void gtk_event_controller_set_event_mask (GtkEventController *controller,
GdkEventMask event_mask);
GDK_AVAILABLE_IN_3_14
GdkEventMask gtk_event_controller_get_event_mask (GtkEventController *controller);
GDK_AVAILABLE_IN_3_14
gboolean gtk_event_controller_handle_event (GtkEventController *controller,
const GdkEvent *event);
GDK_AVAILABLE_IN_3_14
void gtk_event_controller_reset (GtkEventController *controller);
G_END_DECLS
#endif /* __GTK_EVENT_CONTROLLER_H__ */