forked from AuroraMiddleware/gtk
introduce private GtkActionHelper
The current process of implementing GActionObserver is annoying and the GSimpleActionObserver interface leaves a lot to be desired. Introduce a new class, GtkActionHelper that gives you pretty much everything you'd want to do as an implementor of GtkActionable. The GtkActionHelper also features an "application" mode that is not associated with a particular GtkWidget but rather with whatever widget happens to be the active window of the given GtkApplication at a particular point in time. This will be useful for the Mac OS menubar.
This commit is contained in:
Ryan Lortie
parent
d30d56452c
commit
652f16dd98
@ -407,6 +407,7 @@ gtk_private_h_sources = \
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gtkapplicationprivate.h \
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gtkaccelgroupprivate.h \
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gtkaccelmapprivate.h \
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gtkactionhelper.h \
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gtkallocatedbitmaskprivate.h \
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gtkappchooserprivate.h \
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gtkappchoosermodule.h \
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@ -586,6 +587,7 @@ gtk_base_c_sources = \
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gtkaccelmap.c \
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gtkaccessible.c \
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gtkaction.c \
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gtkactionhelper.c \
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gtkactiongroup.c \
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gtkactivatable.c \
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gtkadjustment.c \
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631
gtk/gtkactionhelper.c
Normal file
631
gtk/gtkactionhelper.c
Normal file
@ -0,0 +1,631 @@
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/*
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* Copyright © 2012 Canonical Limited
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* licence 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, but
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* 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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* Authors: Ryan Lortie <desrt@desrt.ca>
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*/
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#include "gtkactionhelper.h"
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#include "gactionobservable.h"
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#include "gtkwidget.h"
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#include "gtkwidgetprivate.h"
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#include <string.h>
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typedef struct
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{
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GActionGroup *group;
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GHashTable *watchers;
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} GtkActionHelperGroup;
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static void gtk_action_helper_action_added (GtkActionHelper *helper,
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gboolean enabled,
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const GVariantType *parameter_type,
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GVariant *state,
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gboolean should_emit_signals);
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static void gtk_action_helper_action_removed (GtkActionHelper *helper);
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static void gtk_action_helper_action_enabled_changed (GtkActionHelper *helper,
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gboolean enabled);
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static void gtk_action_helper_action_state_changed (GtkActionHelper *helper,
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GVariant *new_state);
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typedef GObjectClass GtkActionHelperClass;
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struct _GtkActionHelper
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{
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GObject parent_instance;
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GtkApplication *application;
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GtkWidget *widget;
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GtkActionHelperGroup *group;
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GActionMuxer *action_context;
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gchar *action_name;
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GVariant *target;
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GtkActionHelperRole role;
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gboolean can_activate;
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gboolean enabled;
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gboolean active;
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gint reporting;
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};
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enum
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{
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PROP_0,
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PROP_ENABLED,
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PROP_ACTIVE,
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PROP_ROLE,
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N_PROPS
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};
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static GParamSpec *gtk_action_helper_pspecs[N_PROPS];
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static void gtk_action_helper_observer_iface_init (GActionObserverInterface *iface);
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G_DEFINE_TYPE_WITH_CODE (GtkActionHelper, gtk_action_helper, G_TYPE_OBJECT,
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G_IMPLEMENT_INTERFACE (G_TYPE_ACTION_OBSERVER, gtk_action_helper_observer_iface_init))
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static void
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gtk_action_helper_report_change (GtkActionHelper *helper,
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guint prop_id)
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{
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helper->reporting++;
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if (!helper->application)
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{
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switch (prop_id)
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{
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case PROP_ENABLED:
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gtk_widget_set_sensitive (GTK_WIDGET (helper->widget), helper->enabled);
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break;
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case PROP_ACTIVE:
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{
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GParamSpec *pspec;
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pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (helper->widget), "active");
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if (pspec && G_PARAM_SPEC_VALUE_TYPE (pspec) == G_TYPE_BOOLEAN)
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g_object_set (G_OBJECT (helper->widget), "active", helper->active, NULL);
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}
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break;
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case PROP_ROLE:
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{
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GParamSpec *pspec;
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pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (helper->widget), "action-role");
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if (pspec && G_PARAM_SPEC_VALUE_TYPE (pspec) == G_TYPE_UINT)
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g_object_set (G_OBJECT (helper->widget), "action-role", helper->role, NULL);
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}
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break;
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default:
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g_assert_not_reached ();
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}
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}
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g_object_notify_by_pspec (G_OBJECT (helper), gtk_action_helper_pspecs[prop_id]);
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helper->reporting--;
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}
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static void
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gtk_action_helper_action_added (GtkActionHelper *helper,
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gboolean enabled,
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const GVariantType *parameter_type,
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GVariant *state,
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gboolean should_emit_signals)
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{
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/* we can only activate if we have the correct type of parameter */
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helper->can_activate = (helper->target == NULL && parameter_type == NULL) ||
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(helper->target != NULL && parameter_type != NULL &&
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g_variant_is_of_type (helper->target, parameter_type));
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if (!helper->can_activate)
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return;
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helper->enabled = enabled;
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if (helper->target != NULL && state != NULL)
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{
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helper->active = g_variant_equal (state, helper->target);
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helper->role = GTK_ACTION_HELPER_ROLE_RADIO;
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}
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else if (state != NULL && g_variant_is_of_type (state, G_VARIANT_TYPE_BOOLEAN))
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{
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helper->active = g_variant_get_boolean (state);
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helper->role = GTK_ACTION_HELPER_ROLE_TOGGLE;
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}
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if (should_emit_signals)
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{
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if (helper->enabled)
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gtk_action_helper_report_change (helper, PROP_ENABLED);
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if (helper->active)
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gtk_action_helper_report_change (helper, PROP_ACTIVE);
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if (helper->role)
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gtk_action_helper_report_change (helper, PROP_ROLE);
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}
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}
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static void
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gtk_action_helper_action_removed (GtkActionHelper *helper)
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{
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if (!helper->can_activate)
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return;
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helper->can_activate = FALSE;
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if (helper->enabled)
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{
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helper->enabled = FALSE;
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gtk_action_helper_report_change (helper, PROP_ENABLED);
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}
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if (helper->active)
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{
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helper->enabled = FALSE;
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gtk_action_helper_report_change (helper, PROP_ACTIVE);
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}
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if (helper->role)
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{
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helper->role = GTK_ACTION_HELPER_ROLE_NORMAL;
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gtk_action_helper_report_change (helper, PROP_ROLE);
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}
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}
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static void
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gtk_action_helper_action_enabled_changed (GtkActionHelper *helper,
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gboolean enabled)
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{
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if (!helper->can_activate)
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return;
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if (helper->enabled == enabled)
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return;
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helper->enabled = enabled;
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gtk_action_helper_report_change (helper, PROP_ENABLED);
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}
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static void
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gtk_action_helper_action_state_changed (GtkActionHelper *helper,
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GVariant *new_state)
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{
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gboolean was_active;
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if (!helper->can_activate)
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return;
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was_active = helper->active;
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if (helper->target)
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helper->active = g_variant_equal (new_state, helper->target);
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else if (g_variant_is_of_type (new_state, G_VARIANT_TYPE_BOOLEAN))
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helper->active = g_variant_get_boolean (new_state);
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else
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helper->active = FALSE;
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if (helper->active != was_active)
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gtk_action_helper_report_change (helper, PROP_ACTIVE);
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}
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static void
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gtk_action_helper_get_property (GObject *object, guint prop_id,
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GValue *value, GParamSpec *pspec)
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{
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GtkActionHelper *helper = GTK_ACTION_HELPER (object);
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switch (prop_id)
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{
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case PROP_ENABLED:
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g_value_set_boolean (value, helper->enabled);
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break;
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case PROP_ACTIVE:
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g_value_set_boolean (value, helper->active);
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break;
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case PROP_ROLE:
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g_value_set_uint (value, helper->role);
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break;
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default:
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g_assert_not_reached ();
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}
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}
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static void
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gtk_action_helper_finalize (GObject *object)
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{
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GtkActionHelper *helper = GTK_ACTION_HELPER (object);
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if (helper->application)
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{
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g_signal_handlers_disconnect_by_data (helper->application, helper);
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g_object_unref (helper->action_context);
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g_object_unref (helper->application);
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if (helper->widget)
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g_object_unref (helper->widget);
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}
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g_free (helper->action_name);
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if (helper->target)
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g_variant_unref (helper->target);
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G_OBJECT_CLASS (gtk_action_helper_parent_class)
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->finalize (object);
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}
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static void
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gtk_action_helper_observer_action_added (GActionObserver *observer,
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GActionObservable *observable,
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const gchar *action_name,
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const GVariantType *parameter_type,
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gboolean enabled,
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GVariant *state)
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{
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gtk_action_helper_action_added (GTK_ACTION_HELPER (observer), enabled, parameter_type, state, TRUE);
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}
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static void
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gtk_action_helper_observer_action_enabled_changed (GActionObserver *observer,
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GActionObservable *observable,
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const gchar *action_name,
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gboolean enabled)
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{
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gtk_action_helper_action_enabled_changed (GTK_ACTION_HELPER (observer), enabled);
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}
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static void
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gtk_action_helper_observer_action_state_changed (GActionObserver *observer,
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GActionObservable *observable,
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const gchar *action_name,
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GVariant *state)
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{
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gtk_action_helper_action_state_changed (GTK_ACTION_HELPER (observer), state);
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}
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static void
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gtk_action_helper_observer_action_removed (GActionObserver *observer,
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GActionObservable *observable,
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const gchar *action_name)
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{
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gtk_action_helper_action_removed (GTK_ACTION_HELPER (observer));
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}
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static void
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gtk_action_helper_init (GtkActionHelper *helper)
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{
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}
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static void
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gtk_action_helper_class_init (GtkActionHelperClass *class)
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{
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class->get_property = gtk_action_helper_get_property;
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class->finalize = gtk_action_helper_finalize;
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gtk_action_helper_pspecs[PROP_ENABLED] = g_param_spec_boolean ("enabled", "enabled", "enabled", FALSE,
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G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
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gtk_action_helper_pspecs[PROP_ACTIVE] = g_param_spec_boolean ("active", "active", "active", FALSE,
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G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
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gtk_action_helper_pspecs[PROP_ROLE] = g_param_spec_uint ("role", "role", "role", 0, 2, 0,
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G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
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g_object_class_install_properties (class, N_PROPS, gtk_action_helper_pspecs);
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}
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static void
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gtk_action_helper_observer_iface_init (GActionObserverInterface *iface)
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{
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iface->action_added = gtk_action_helper_observer_action_added;
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iface->action_enabled_changed = gtk_action_helper_observer_action_enabled_changed;
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iface->action_state_changed = gtk_action_helper_observer_action_state_changed;
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iface->action_removed = gtk_action_helper_observer_action_removed;
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}
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/*< private >
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* gtk_action_helper_new:
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* @widget: a #GtkWidget implementing #GtkActionable
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*
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* Creates a helper to track the state of a named action. This will
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* usually be used by widgets implementing #GtkActionable.
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*
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* This helper class is usually used by @widget itself. In order to
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* avoid reference cycles, the helper does not hold a reference on
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* @widget, but will assume that it continues to exist for the duration
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* of the life of the helper. If you are using the helper from outside
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* of the widget, you should take a ref on @widget for each ref you hold
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* on the helper.
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*
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* Returns: a new #GtkActionHelper
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*/
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GtkActionHelper *
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gtk_action_helper_new (GtkActionable *widget)
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{
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GtkActionHelper *helper;
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g_return_val_if_fail (GTK_IS_ACTIONABLE (widget), NULL);
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helper = g_object_new (GTK_TYPE_ACTION_HELPER, NULL);
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helper->widget = GTK_WIDGET (widget);
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if (helper->widget)
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{
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GParamSpec *pspec;
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helper->enabled = gtk_widget_get_sensitive (GTK_WIDGET (helper->widget));
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pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (helper->widget), "active");
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if (pspec && G_PARAM_SPEC_VALUE_TYPE (pspec) == G_TYPE_BOOLEAN)
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g_object_get (G_OBJECT (helper->widget), "active", &helper->active, NULL);
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}
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helper->action_context = _gtk_widget_get_action_muxer (GTK_WIDGET (widget));
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return helper;
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}
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static void
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gtk_action_helper_active_window_changed (GObject *object,
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GParamSpec *pspec,
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gpointer user_data)
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{
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GtkActionHelper *helper = user_data;
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GActionMuxer *parent;
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if (helper->widget)
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g_object_unref (helper->widget);
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helper->widget = GTK_WIDGET (gtk_application_get_active_window (helper->application));
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if (helper->widget)
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{
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parent = g_object_ref (_gtk_widget_get_action_muxer (GTK_WIDGET (helper->widget)));
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g_object_ref (helper->widget);
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}
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else
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{
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parent = g_action_muxer_new ();
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g_action_muxer_insert (parent, "app", G_ACTION_GROUP (helper->application));
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}
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g_action_muxer_set_parent (helper->action_context, parent);
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g_object_unref (parent);
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}
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GtkActionHelper *
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gtk_action_helper_new_with_application (GtkApplication *application)
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{
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GtkActionHelper *helper;
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g_return_val_if_fail (GTK_IS_APPLICATION (application), NULL);
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helper = g_object_new (GTK_TYPE_ACTION_HELPER, NULL);
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helper->application = g_object_ref (application);
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helper->action_context = g_action_muxer_new ();
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g_signal_connect (application, "notify::active-window", G_CALLBACK (gtk_action_helper_active_window_changed), helper);
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gtk_action_helper_active_window_changed (NULL, NULL, helper);
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return helper;
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}
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void
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gtk_action_helper_set_action_name (GtkActionHelper *helper,
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const gchar *action_name)
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{
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gboolean was_enabled, was_active;
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GtkActionHelperRole old_role;
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const GVariantType *parameter_type;
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gboolean enabled;
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GVariant *state;
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if (g_strcmp0 (action_name, helper->action_name) == 0)
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return;
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if (helper->action_name)
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{
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g_action_observable_unregister_observer (G_ACTION_OBSERVABLE (helper->action_context),
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helper->action_name,
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G_ACTION_OBSERVER (helper));
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g_free (helper->action_name);
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}
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helper->action_name = g_strdup (action_name);
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g_action_observable_register_observer (G_ACTION_OBSERVABLE (helper->action_context),
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helper->action_name,
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G_ACTION_OBSERVER (helper));
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/* Start by recording the current state of our properties so we know
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* what notify signals we will need to send.
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*/
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was_enabled = helper->enabled;
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was_active = helper->active;
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old_role = helper->role;
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if (g_action_group_query_action (G_ACTION_GROUP (helper->action_context), helper->action_name,
|
||||
&enabled, ¶meter_type, NULL, NULL, &state))
|
||||
{
|
||||
gtk_action_helper_action_added (helper, enabled, parameter_type, state, FALSE);
|
||||
|
||||
if (state)
|
||||
g_variant_unref (state);
|
||||
}
|
||||
else
|
||||
{
|
||||
helper->enabled = FALSE;
|
||||
}
|
||||
|
||||
/* Send the notifies for the properties that changed.
|
||||
*
|
||||
* When called during construction, widget is NULL. We don't need to
|
||||
* report in that case.
|
||||
*/
|
||||
if (helper->enabled != was_enabled)
|
||||
gtk_action_helper_report_change (helper, PROP_ENABLED);
|
||||
|
||||
if (helper->active != was_active)
|
||||
gtk_action_helper_report_change (helper, PROP_ACTIVE);
|
||||
|
||||
if (helper->role != old_role)
|
||||
gtk_action_helper_report_change (helper, PROP_ROLE);
|
||||
|
||||
if (!helper->application)
|
||||
g_object_notify (G_OBJECT (helper->widget), "action-name");
|
||||
}
|
||||
|
||||
/*< private >
|
||||
* gtk_action_helper_set_action_target_value:
|
||||
* @helper: a #GtkActionHelper
|
||||
* @target_value: an action target, as per #GtkActionable
|
||||
*
|
||||
* This function consumes @action_target if it is floating.
|
||||
*/
|
||||
void
|
||||
gtk_action_helper_set_action_target_value (GtkActionHelper *helper,
|
||||
GVariant *target_value)
|
||||
{
|
||||
gboolean was_enabled;
|
||||
gboolean was_active;
|
||||
|
||||
if (target_value == helper->target)
|
||||
return;
|
||||
|
||||
if (target_value && helper->target && g_variant_equal (target_value, helper->target))
|
||||
return;
|
||||
|
||||
if (helper->target)
|
||||
{
|
||||
g_variant_unref (helper->target);
|
||||
helper->target = NULL;
|
||||
}
|
||||
|
||||
if (target_value)
|
||||
helper->target = g_variant_ref_sink (target_value);
|
||||
|
||||
was_enabled = helper->enabled;
|
||||
was_active = helper->active;
|
||||
|
||||
/* If we are attached to an action group then it is possible that this
|
||||
* change of the target value could impact our properties (including
|
||||
* changes to 'can_activate' and therefore 'enabled', due to resolving
|
||||
* a parameter type mismatch).
|
||||
*
|
||||
* Start over again by pretending the action gets re-added.
|
||||
*/
|
||||
helper->can_activate = FALSE;
|
||||
helper->enabled = FALSE;
|
||||
helper->active = FALSE;
|
||||
|
||||
if (helper->action_context)
|
||||
{
|
||||
const GVariantType *parameter_type;
|
||||
gboolean enabled;
|
||||
GVariant *state;
|
||||
|
||||
if (g_action_group_query_action (G_ACTION_GROUP (helper->action_context),
|
||||
helper->action_name, &enabled, ¶meter_type,
|
||||
NULL, NULL, &state))
|
||||
{
|
||||
gtk_action_helper_action_added (helper, enabled, parameter_type, state, FALSE);
|
||||
|
||||
if (state)
|
||||
g_variant_unref (state);
|
||||
}
|
||||
}
|
||||
|
||||
if (helper->enabled != was_enabled)
|
||||
gtk_action_helper_report_change (helper, PROP_ENABLED);
|
||||
|
||||
if (helper->active != was_active)
|
||||
gtk_action_helper_report_change (helper, PROP_ACTIVE);
|
||||
|
||||
if (!helper->application)
|
||||
g_object_notify (G_OBJECT (helper->widget), "action-target");
|
||||
}
|
||||
|
||||
const gchar *
|
||||
gtk_action_helper_get_action_name (GtkActionHelper *helper)
|
||||
{
|
||||
if (helper == NULL)
|
||||
return NULL;
|
||||
|
||||
return helper->action_name;
|
||||
}
|
||||
|
||||
GVariant *
|
||||
gtk_action_helper_get_action_target_value (GtkActionHelper *helper)
|
||||
{
|
||||
if (helper == NULL)
|
||||
return NULL;
|
||||
|
||||
return helper->target;
|
||||
}
|
||||
|
||||
GtkActionHelperRole
|
||||
gtk_action_helper_get_role (GtkActionHelper *helper)
|
||||
{
|
||||
if (helper == NULL)
|
||||
return GTK_ACTION_HELPER_ROLE_NORMAL;
|
||||
|
||||
return helper->role;
|
||||
}
|
||||
|
||||
gboolean
|
||||
gtk_action_helper_get_enabled (GtkActionHelper *helper)
|
||||
{
|
||||
g_return_val_if_fail (GTK_IS_ACTION_HELPER (helper), FALSE);
|
||||
|
||||
return helper->enabled;
|
||||
}
|
||||
|
||||
gboolean
|
||||
gtk_action_helper_get_active (GtkActionHelper *helper)
|
||||
{
|
||||
g_return_val_if_fail (GTK_IS_ACTION_HELPER (helper), FALSE);
|
||||
|
||||
return helper->active;
|
||||
}
|
||||
|
||||
void
|
||||
gtk_action_helper_activate (GtkActionHelper *helper)
|
||||
{
|
||||
g_return_if_fail (GTK_IS_ACTION_HELPER (helper));
|
||||
|
||||
if (!helper->can_activate || helper->reporting)
|
||||
return;
|
||||
|
||||
g_action_group_activate_action (G_ACTION_GROUP (helper->action_context),
|
||||
helper->action_name, helper->target);
|
||||
}
|
||||
71
gtk/gtkactionhelper.h
Normal file
71
gtk/gtkactionhelper.h
Normal file
@ -0,0 +1,71 @@
|
||||
/*
|
||||
* Copyright © 2012 Canonical Limited
|
||||
*
|
||||
* 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
|
||||
* licence 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/>.
|
||||
*
|
||||
* Authors: Ryan Lortie <desrt@desrt.ca>
|
||||
*/
|
||||
|
||||
#ifndef __GTK_ACTION_HELPER_H__
|
||||
#define __GTK_ACTION_HELPER_H__
|
||||
|
||||
#include <gtk/gtkapplication.h>
|
||||
#include <gtk/gtkactionable.h>
|
||||
|
||||
#define GTK_TYPE_ACTION_HELPER (gtk_action_helper_get_type ())
|
||||
#define GTK_ACTION_HELPER(inst) (G_TYPE_CHECK_INSTANCE_CAST ((inst), \
|
||||
GTK_TYPE_ACTION_HELPER, GtkActionHelper))
|
||||
#define GTK_IS_ACTION_HELPER(inst) (G_TYPE_CHECK_INSTANCE_TYPE ((inst), \
|
||||
GTK_TYPE_ACTION_HELPER))
|
||||
|
||||
typedef struct _GtkActionHelper GtkActionHelper;
|
||||
|
||||
typedef enum
|
||||
{
|
||||
GTK_ACTION_HELPER_ROLE_NORMAL,
|
||||
GTK_ACTION_HELPER_ROLE_TOGGLE,
|
||||
GTK_ACTION_HELPER_ROLE_RADIO
|
||||
} GtkActionHelperRole;
|
||||
|
||||
G_GNUC_INTERNAL
|
||||
GType gtk_action_helper_get_type (void);
|
||||
|
||||
G_GNUC_INTERNAL
|
||||
GtkActionHelper * gtk_action_helper_new (GtkActionable *widget);
|
||||
|
||||
G_GNUC_INTERNAL
|
||||
GtkActionHelper * gtk_action_helper_new_with_application (GtkApplication *application);
|
||||
|
||||
G_GNUC_INTERNAL
|
||||
void gtk_action_helper_set_action_name (GtkActionHelper *helper,
|
||||
const gchar *action_name);
|
||||
G_GNUC_INTERNAL
|
||||
void gtk_action_helper_set_action_target_value (GtkActionHelper *helper,
|
||||
GVariant *action_target);
|
||||
G_GNUC_INTERNAL
|
||||
const gchar * gtk_action_helper_get_action_name (GtkActionHelper *helper);
|
||||
G_GNUC_INTERNAL
|
||||
GVariant * gtk_action_helper_get_action_target_value (GtkActionHelper *helper);
|
||||
|
||||
G_GNUC_INTERNAL
|
||||
GtkActionHelperRole gtk_action_helper_get_role (GtkActionHelper *helper);
|
||||
G_GNUC_INTERNAL
|
||||
gboolean gtk_action_helper_get_enabled (GtkActionHelper *helper);
|
||||
G_GNUC_INTERNAL
|
||||
gboolean gtk_action_helper_get_active (GtkActionHelper *helper);
|
||||
|
||||
G_GNUC_INTERNAL
|
||||
void gtk_action_helper_activate (GtkActionHelper *helper);
|
||||
|
||||
#endif /* __GTK_ACTION_HELPER_H__ */
|
||||
Loading…
Reference in New Issue
Block a user