diff options
Diffstat (limited to 'gtk/gtkeventcontrollerkey.c')
| -rw-r--r-- | gtk/gtkeventcontrollerkey.c | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/gtk/gtkeventcontrollerkey.c b/gtk/gtkeventcontrollerkey.c new file mode 100644 index 0000000000..70c34bd4e6 --- /dev/null +++ b/gtk/gtkeventcontrollerkey.c @@ -0,0 +1,271 @@ +/* GTK - The GIMP Toolkit + * Copyright (C) 2017, 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 "gtkintl.h" +#include "gtkprivate.h" +#include "gtkwidgetprivate.h" +#include "gtkeventcontrollerprivate.h" +#include "gtkeventcontrollerkey.h" +#include "gtkbindings.h" + +#include <gdk/gdk.h> + +struct _GtkEventControllerKey +{ + GtkEventController parent_instance; + GtkIMContext *im_context; + GHashTable *pressed_keys; + + const GdkEvent *current_event; +}; + +struct _GtkEventControllerKeyClass +{ + GtkEventControllerClass parent_class; +}; + +enum { + KEY_PRESSED, + KEY_RELEASED, + MODIFIERS, + IM_UPDATE, + FOCUS_IN, + FOCUS_OUT, + N_SIGNALS +}; + +static guint signals[N_SIGNALS] = { 0 }; + +G_DEFINE_TYPE (GtkEventControllerKey, gtk_event_controller_key, + GTK_TYPE_EVENT_CONTROLLER) + +static void +gtk_event_controller_finalize (GObject *object) +{ + GtkEventControllerKey *key = GTK_EVENT_CONTROLLER_KEY (object); + + g_hash_table_destroy (key->pressed_keys); + g_clear_object (&key->im_context); + + G_OBJECT_CLASS (gtk_event_controller_key_parent_class)->finalize (object); +} + +static gboolean +gtk_event_controller_key_handle_event (GtkEventController *controller, + const GdkEvent *event) +{ + GtkEventControllerKey *key = GTK_EVENT_CONTROLLER_KEY (controller); + GdkEventType event_type = gdk_event_get_event_type (event); + gboolean handled; + GdkModifierType state; + guint16 keycode; + guint keyval; + + if (event_type == GDK_FOCUS_CHANGE) + { + if (event->focus_change.in) + g_signal_emit (controller, signals[FOCUS_IN], 0); + else + g_signal_emit (controller, signals[FOCUS_OUT], 0); + + return FALSE; + } + + if (event_type != GDK_KEY_PRESS && event_type != GDK_KEY_RELEASE) + return FALSE; + + if (key->im_context && + gtk_im_context_filter_keypress (key->im_context, (GdkEventKey *) event)) + { + g_signal_emit (controller, signals[IM_UPDATE], 0); + return TRUE; + } + + if (!gdk_event_get_state (event, &state) || !event->key.is_modifier) + return FALSE; + + key->current_event = event; + + if (event->key.is_modifier) + { + if (event_type == GDK_KEY_PRESS) + g_signal_emit (controller, signals[MODIFIERS], 0, state, &handled); + else + handled = TRUE; + + if (handled == TRUE) + { + key->current_event = NULL; + return TRUE; + } + } + + gdk_event_get_keycode (event, &keycode); + gdk_event_get_keyval (event, &keyval); + + if (event_type == GDK_KEY_PRESS) + { + g_signal_emit (controller, signals[KEY_PRESSED], 0, + keyval, keycode, state, &handled); + if (handled) + g_hash_table_add (key->pressed_keys, GUINT_TO_POINTER (keyval)); + } + else if (event_type == GDK_KEY_RELEASE) + { + g_signal_emit (controller, signals[KEY_RELEASED], 0, + keyval, keycode, state); + + handled = g_hash_table_lookup (key->pressed_keys, GUINT_TO_POINTER (keyval)) != NULL; + g_hash_table_remove (key->pressed_keys, GUINT_TO_POINTER (keyval)); + } + else + handled = FALSE; + + key->current_event = NULL; + + return handled; +} + +static void +gtk_event_controller_key_class_init (GtkEventControllerKeyClass *klass) +{ + GtkEventControllerClass *controller_class = GTK_EVENT_CONTROLLER_CLASS (klass); + GObjectClass *object_class = G_OBJECT_CLASS (klass); + + object_class->finalize = gtk_event_controller_finalize; + controller_class->handle_event = gtk_event_controller_key_handle_event; + + signals[KEY_PRESSED] = + g_signal_new (I_("key-pressed"), + GTK_TYPE_EVENT_CONTROLLER_KEY, + G_SIGNAL_RUN_LAST, + 0, _gtk_boolean_handled_accumulator, NULL, NULL, + G_TYPE_BOOLEAN, 3, G_TYPE_UINT, G_TYPE_UINT, GDK_TYPE_MODIFIER_TYPE); + signals[KEY_RELEASED] = + g_signal_new (I_("key-released"), + GTK_TYPE_EVENT_CONTROLLER_KEY, + G_SIGNAL_RUN_LAST, + 0, NULL, NULL, NULL, + G_TYPE_NONE, 3, G_TYPE_UINT, G_TYPE_UINT, GDK_TYPE_MODIFIER_TYPE); + signals[MODIFIERS] = + g_signal_new (I_("modifiers"), + GTK_TYPE_EVENT_CONTROLLER_KEY, + G_SIGNAL_RUN_LAST, + 0, NULL, NULL, + g_cclosure_marshal_BOOLEAN__FLAGS, + G_TYPE_BOOLEAN, 1, GDK_TYPE_MODIFIER_TYPE); + signals[IM_UPDATE] = + g_signal_new (I_("im-update"), + GTK_TYPE_EVENT_CONTROLLER_KEY, + G_SIGNAL_RUN_LAST, + 0, NULL, NULL, + g_cclosure_marshal_VOID__VOID, + G_TYPE_NONE, 0); + signals[FOCUS_IN] = + g_signal_new (I_("focus-in"), + GTK_TYPE_EVENT_CONTROLLER_KEY, + G_SIGNAL_RUN_LAST, + 0, NULL, NULL, + g_cclosure_marshal_VOID__VOID, + G_TYPE_NONE, 0); + signals[FOCUS_OUT] = + g_signal_new (I_("focus-out"), + GTK_TYPE_EVENT_CONTROLLER_KEY, + G_SIGNAL_RUN_LAST, + 0, NULL, NULL, + g_cclosure_marshal_VOID__VOID, + G_TYPE_NONE, 0); +} + +static void +gtk_event_controller_key_init (GtkEventControllerKey *controller) +{ + controller->pressed_keys = g_hash_table_new (NULL, NULL); +} + +GtkEventController * +gtk_event_controller_key_new (GtkWidget *widget) +{ + g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL); + + return g_object_new (GTK_TYPE_EVENT_CONTROLLER_KEY, + "widget", widget, + NULL); +} + +void +gtk_event_controller_key_set_im_context (GtkEventControllerKey *controller, + GtkIMContext *im_context) +{ + g_return_if_fail (GTK_IS_EVENT_CONTROLLER_KEY (controller)); + g_return_if_fail (!im_context || GTK_IS_IM_CONTEXT (im_context)); + + if (controller->im_context) + gtk_im_context_reset (controller->im_context); + + g_set_object (&controller->im_context, im_context); +} + +/** + * gtk_event_controller_key_get_im_context: + * @controller: a #GtkEventControllerKey + * + * Gets the IM context of a key controller. + * + * Returns: (transfer none): the IM context + * + * Since: 3.94 + **/ +GtkIMContext * +gtk_event_controller_key_get_im_context (GtkEventControllerKey *controller) +{ + g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER_KEY (controller), NULL); + + return controller->im_context; +} + +gboolean +gtk_event_controller_key_forward (GtkEventControllerKey *controller, + GtkWidget *widget) +{ + g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER_KEY (controller), FALSE); + g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE); + g_return_val_if_fail (controller->current_event != NULL, FALSE); + + if (!gtk_widget_get_realized (widget)) + gtk_widget_realize (widget); + + if (_gtk_widget_captured_event (widget, (GdkEvent *) controller->current_event)) + return TRUE; + if (gtk_widget_event (widget, (GdkEvent *) controller->current_event)) + return TRUE; + + return FALSE; +} + +guint +gtk_event_controller_key_get_group (GtkEventControllerKey *controller) +{ + g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER_KEY (controller), FALSE); + g_return_val_if_fail (controller->current_event != NULL, FALSE); + + return controller->current_event->key.group; +} |