forked from AuroraMiddleware/gtk
gtk: Add GtkEventControllerKey
This event controller is meant to replace usage from key-press/release-event handlers all through. Optionally it can be set a GtkIMContext, so interaction is carried by the controller.
This commit is contained in:
Carlos Garnacho
parent
47ea3a9452
commit
1ce79b29e3
@ -93,6 +93,7 @@
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#include <gtk/gtkentrycompletion.h>
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#include <gtk/gtkenums.h>
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#include <gtk/gtkeventcontroller.h>
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#include <gtk/gtkeventcontrollerkey.h>
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#include <gtk/gtkeventcontrollermotion.h>
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#include <gtk/gtkeventcontrollerscroll.h>
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#include <gtk/gtkexpander.h>
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218
gtk/gtkeventcontrollerkey.c
Normal file
218
gtk/gtkeventcontrollerkey.c
Normal file
@ -0,0 +1,218 @@
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/* GTK - The GIMP Toolkit
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* Copyright (C) 2017, 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 "gtkintl.h"
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#include "gtkprivate.h"
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#include "gtkwidget.h"
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#include "gtkeventcontrollerprivate.h"
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#include "gtkeventcontrollerkey.h"
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#include "gtkbindings.h"
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#include <gdk/gdk.h>
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struct _GtkEventControllerKey
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{
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GtkEventController parent_instance;
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GtkIMContext *im_context;
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GHashTable *pressed_keys;
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const GdkEvent *current_event;
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};
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struct _GtkEventControllerKeyClass
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{
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GtkEventControllerClass parent_class;
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};
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enum {
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KEY_PRESSED,
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KEY_RELEASED,
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MODIFIERS,
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IM_UPDATE,
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N_SIGNALS
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};
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static guint signals[N_SIGNALS] = { 0 };
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G_DEFINE_TYPE (GtkEventControllerKey, gtk_event_controller_key,
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GTK_TYPE_EVENT_CONTROLLER)
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static void
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gtk_event_controller_finalize (GObject *object)
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{
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GtkEventControllerKey *key = GTK_EVENT_CONTROLLER_KEY (object);
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g_hash_table_destroy (key->pressed_keys);
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g_clear_object (&key->im_context);
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G_OBJECT_CLASS (gtk_event_controller_key_parent_class)->finalize (object);
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}
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static gboolean
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gtk_event_controller_key_handle_event (GtkEventController *controller,
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const GdkEvent *event)
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{
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GtkEventControllerKey *key = GTK_EVENT_CONTROLLER_KEY (controller);
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GdkEventType event_type = gdk_event_get_event_type (event);
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gboolean handled, is_modifier;
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GdkModifierType state;
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guint16 keycode;
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guint keyval;
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if (event_type != GDK_KEY_PRESS && event_type != GDK_KEY_RELEASE)
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return FALSE;
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if (key->im_context &&
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gtk_im_context_filter_keypress (key->im_context, (GdkEventKey *) event))
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{
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g_signal_emit (controller, signals[IM_UPDATE], 0);
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return TRUE;
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}
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if (!gdk_event_get_state (event, &state) ||
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!gdk_event_get_key_is_modifier (event, &is_modifier))
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return FALSE;
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key->current_event = event;
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if (is_modifier)
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{
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if (event_type == GDK_KEY_PRESS)
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g_signal_emit (controller, signals[MODIFIERS], 0, state, &handled);
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else
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handled = TRUE;
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if (handled == TRUE)
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{
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key->current_event = NULL;
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return TRUE;
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}
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}
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gdk_event_get_keycode (event, &keycode);
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gdk_event_get_keyval (event, &keyval);
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if (event_type == GDK_KEY_PRESS)
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{
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g_signal_emit (controller, signals[KEY_PRESSED], 0,
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keyval, keycode, state, &handled);
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if (handled)
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g_hash_table_add (key->pressed_keys, GUINT_TO_POINTER (keyval));
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}
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else if (event_type == GDK_KEY_RELEASE)
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{
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g_signal_emit (controller, signals[KEY_RELEASED], 0,
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keyval, keycode, state);
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handled = g_hash_table_lookup (key->pressed_keys, GUINT_TO_POINTER (keyval)) != NULL;
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g_hash_table_remove (key->pressed_keys, GUINT_TO_POINTER (keyval));
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}
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else
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handled = FALSE;
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key->current_event = NULL;
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return handled;
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}
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static void
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gtk_event_controller_key_class_init (GtkEventControllerKeyClass *klass)
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{
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GtkEventControllerClass *controller_class = GTK_EVENT_CONTROLLER_CLASS (klass);
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->finalize = gtk_event_controller_finalize;
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controller_class->handle_event = gtk_event_controller_key_handle_event;
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signals[KEY_PRESSED] =
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g_signal_new (I_("key-pressed"),
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GTK_TYPE_EVENT_CONTROLLER_KEY,
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G_SIGNAL_RUN_LAST,
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0, _gtk_boolean_handled_accumulator, NULL, NULL,
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G_TYPE_BOOLEAN, 3, G_TYPE_UINT, G_TYPE_UINT, GDK_TYPE_MODIFIER_TYPE);
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signals[KEY_RELEASED] =
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g_signal_new (I_("key-released"),
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GTK_TYPE_EVENT_CONTROLLER_KEY,
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G_SIGNAL_RUN_LAST,
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0, NULL, NULL, NULL,
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G_TYPE_NONE, 3, G_TYPE_UINT, G_TYPE_UINT, GDK_TYPE_MODIFIER_TYPE);
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signals[MODIFIERS] =
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g_signal_new (I_("modifiers"),
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GTK_TYPE_EVENT_CONTROLLER_KEY,
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G_SIGNAL_RUN_LAST,
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0, NULL, NULL,
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g_cclosure_marshal_BOOLEAN__FLAGS,
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G_TYPE_BOOLEAN, 1, GDK_TYPE_MODIFIER_TYPE);
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signals[IM_UPDATE] =
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g_signal_new (I_("im-update"),
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GTK_TYPE_EVENT_CONTROLLER_KEY,
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G_SIGNAL_RUN_LAST,
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0, NULL, NULL,
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g_cclosure_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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}
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static void
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gtk_event_controller_key_init (GtkEventControllerKey *controller)
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{
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controller->pressed_keys = g_hash_table_new (NULL, NULL);
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}
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GtkEventController *
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gtk_event_controller_key_new (GtkWidget *widget)
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{
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g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
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return g_object_new (GTK_TYPE_EVENT_CONTROLLER_KEY,
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"widget", widget,
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NULL);
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}
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void
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gtk_event_controller_key_set_im_context (GtkEventControllerKey *controller,
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GtkIMContext *im_context)
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{
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g_return_if_fail (GTK_IS_EVENT_CONTROLLER_KEY (controller));
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g_return_if_fail (!im_context || GTK_IS_IM_CONTEXT (im_context));
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if (controller->im_context)
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gtk_im_context_reset (controller->im_context);
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g_set_object (&controller->im_context, im_context);
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}
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/**
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* gtk_event_controller_key_get_im_context:
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* @controller: a #GtkEventControllerKey
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*
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* Gets the IM context of a key controller.
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*
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* Returns: (transfer none): the IM context
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*
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* Since: 3.94
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**/
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GtkIMContext *
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gtk_event_controller_key_get_im_context (GtkEventControllerKey *controller)
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{
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g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER_KEY (controller), NULL);
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return controller->im_context;
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}
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57
gtk/gtkeventcontrollerkey.h
Normal file
57
gtk/gtkeventcontrollerkey.h
Normal file
@ -0,0 +1,57 @@
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/* GTK - The GIMP Toolkit
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* Copyright (C) 2017, 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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#ifndef __GTK_EVENT_CONTROLLER_KEY_H__
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#define __GTK_EVENT_CONTROLLER_KEY_H__
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#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
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#error "Only <gtk/gtk.h> can be included directly."
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#endif
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#include <gdk/gdk.h>
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#include <gtk/gtkeventcontroller.h>
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#include <gtk/gtkimcontext.h>
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G_BEGIN_DECLS
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#define GTK_TYPE_EVENT_CONTROLLER_KEY (gtk_event_controller_key_get_type ())
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#define GTK_EVENT_CONTROLLER_KEY(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), GTK_TYPE_EVENT_CONTROLLER_KEY, GtkEventControllerKey))
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#define GTK_EVENT_CONTROLLER_KEY_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), GTK_TYPE_EVENT_CONTROLLER_KEY, GtkEventControllerKeyClass))
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#define GTK_IS_EVENT_CONTROLLER_KEY(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), GTK_TYPE_EVENT_CONTROLLER_KEY))
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#define GTK_IS_EVENT_CONTROLLER_KEY_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), GTK_TYPE_EVENT_CONTROLLER_KEY))
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#define GTK_EVENT_CONTROLLER_KEY_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), GTK_TYPE_EVENT_CONTROLLER_KEY, GtkEventControllerKeyClass))
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typedef struct _GtkEventControllerKey GtkEventControllerKey;
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typedef struct _GtkEventControllerKeyClass GtkEventControllerKeyClass;
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GDK_AVAILABLE_IN_ALL
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GType gtk_event_controller_key_get_type (void) G_GNUC_CONST;
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GDK_AVAILABLE_IN_ALL
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GtkEventController *gtk_event_controller_key_new (GtkWidget *widget);
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GDK_AVAILABLE_IN_ALL
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void gtk_event_controller_key_set_im_context (GtkEventControllerKey *controller,
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GtkIMContext *im_context);
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GDK_AVAILABLE_IN_ALL
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GtkIMContext * gtk_event_controller_key_get_im_context (GtkEventControllerKey *controller);
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G_END_DECLS
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#endif /* __GTK_EVENT_CONTROLLER_KEY_H__ */
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@ -201,6 +201,8 @@ gtk_public_sources = files([
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'gtkentrybuffer.c',
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'gtkentrycompletion.c',
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'gtkeventcontroller.c',
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'gtkeventcontrollerkey.c',
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'gtkeventcontrollerlegacy.c',
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'gtkeventcontrollermotion.c',
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'gtkeventcontrollerscroll.c',
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'gtkexpander.c',
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@ -439,6 +441,7 @@ gtk_public_headers = files([
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'gtkentrycompletion.h',
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'gtkenums.h',
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'gtkeventcontroller.h',
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'gtkeventcontrollerkey.h',
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'gtkeventcontrollerscroll.h',
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'gtkeventcontrollermotion.h',
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'gtkexpander.h',
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@ -130,6 +130,7 @@ gtk/gtkentrybuffer.c
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gtk/gtkentry.c
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gtk/gtkentrycompletion.c
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gtk/gtkeventcontroller.c
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gtk/gtkeventcontrollerkey.c
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gtk/gtkeventcontrollermotion.c
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gtk/gtkeventcontrollerscroll.c
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gtk/gtkexpander.c
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