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PIKApp/app/widgets/pikacontrollerwheel.c

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* pikacontrollerwheel.c
* Copyright (C) 2004-2015 Michael Natterer <mitch@gimp.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libpikawidgets/pikawidgets.h"
#include "widgets-types.h"
#include "pikacontrollerwheel.h"
#include "pikahelp-ids.h"
#include "pikawidgets-utils.h"
#include "pika-intl.h"
typedef struct _WheelEvent WheelEvent;
struct _WheelEvent
{
const GdkScrollDirection direction;
const gchar *modifier_string;
GdkModifierType modifiers;
const gchar *name;
const gchar *blurb;
};
static void pika_controller_wheel_constructed (GObject *object);
static gint pika_controller_wheel_get_n_events (PikaController *controller);
static const gchar * pika_controller_wheel_get_event_name (PikaController *controller,
gint event_id);
static const gchar * pika_controller_wheel_get_event_blurb (PikaController *controller,
gint event_id);
G_DEFINE_TYPE (PikaControllerWheel, pika_controller_wheel,
PIKA_TYPE_CONTROLLER)
#define parent_class pika_controller_wheel_parent_class
static WheelEvent wheel_events[] =
{
{ GDK_SCROLL_UP, NULL, 0,
"scroll-up",
N_("Scroll Up") },
{ GDK_SCROLL_UP, "<Shift>", 0,
"scroll-up-shift",
N_("Scroll Up") },
{ GDK_SCROLL_UP, "<Primary>", 0,
"scroll-up-primary",
N_("Scroll Up") },
{ GDK_SCROLL_UP, "<Alt>", 0,
"scroll-up-alt",
N_("Scroll Up") },
{ GDK_SCROLL_UP, "<Shift><Primary>", 0,
"scroll-up-shift-primary",
N_("Scroll Up") },
{ GDK_SCROLL_UP, "<Shift><Alt>", 0,
"scroll-up-shift-alt",
N_("Scroll Up") },
{ GDK_SCROLL_UP, "<Primary><Alt>", 0,
"scroll-up-primary-alt",
N_("Scroll Up") },
{ GDK_SCROLL_UP, "<Shift><Primary><Alt>", 0,
"scroll-up-shift-primary-alt",
N_("Scroll Up") },
{ GDK_SCROLL_DOWN, NULL, 0,
"scroll-down",
N_("Scroll Down") },
{ GDK_SCROLL_DOWN, "<Shift>", 0,
"scroll-down-shift",
N_("Scroll Down") },
{ GDK_SCROLL_DOWN, "<Primary>", 0,
"scroll-down-primary",
N_("Scroll Down") },
{ GDK_SCROLL_DOWN, "<Alt>", 0,
"scroll-down-alt",
N_("Scroll Down") },
{ GDK_SCROLL_DOWN, "<Shift><Primary>", 0,
"scroll-down-shift-primary",
N_("Scroll Down") },
{ GDK_SCROLL_DOWN, "<Shift><Alt>", 0,
"scroll-down-shift-alt",
N_("Scroll Down") },
{ GDK_SCROLL_DOWN, "<Primary><Alt>", 0,
"scroll-down-primary-alt",
N_("Scroll Down") },
{ GDK_SCROLL_DOWN, "<Shift><Primary><Alt>", 0,
"scroll-down-shift-primary-alt",
N_("Scroll Down") },
{ GDK_SCROLL_LEFT, NULL, 0,
"scroll-left",
N_("Scroll Left") },
{ GDK_SCROLL_LEFT, "<Shift>", 0,
"scroll-left-shift",
N_("Scroll Left") },
{ GDK_SCROLL_LEFT, "<Primary>", 0,
"scroll-left-primary",
N_("Scroll Left") },
{ GDK_SCROLL_LEFT, "<Alt>", 0,
"scroll-left-alt",
N_("Scroll Left") },
{ GDK_SCROLL_LEFT, "<Shift><Primary>", 0,
"scroll-left-shift-primary",
N_("Scroll Left") },
{ GDK_SCROLL_LEFT, "<Shift><Alt>", 0,
"scroll-left-shift-alt",
N_("Scroll Left") },
{ GDK_SCROLL_LEFT, "<Primary><Alt>", 0,
"scroll-left-primary-alt",
N_("Scroll Left") },
{ GDK_SCROLL_LEFT, "<Shift><Primary><Alt>", 0,
"scroll-left-shift-primary-alt",
N_("Scroll Left") },
{ GDK_SCROLL_RIGHT, NULL, 0,
"scroll-right",
N_("Scroll Right") },
{ GDK_SCROLL_RIGHT, "<Shift>", 0,
"scroll-right-shift",
N_("Scroll Right") },
{ GDK_SCROLL_RIGHT, "<Primary>", 0,
"scroll-right-primary",
N_("Scroll Right") },
{ GDK_SCROLL_RIGHT, "<Alt>", 0,
"scroll-right-alt",
N_("Scroll Right") },
{ GDK_SCROLL_RIGHT, "<Shift><Primary>", 0,
"scroll-right-shift-primary",
N_("Scroll Right") },
{ GDK_SCROLL_RIGHT, "<Shift><Alt>", 0,
"scroll-right-shift-alt",
N_("Scroll Right") },
{ GDK_SCROLL_RIGHT, "<Primary><Alt>", 0,
"scroll-right-primary-alt",
N_("Scroll Right") },
{ GDK_SCROLL_RIGHT, "<Shift><Primary><Alt>", 0,
"scroll-right-shift-primary-alt",
N_("Scroll Right") }
};
static void
pika_controller_wheel_class_init (PikaControllerWheelClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaControllerClass *controller_class = PIKA_CONTROLLER_CLASS (klass);
object_class->constructed = pika_controller_wheel_constructed;
controller_class->name = _("Mouse Wheel");
controller_class->help_id = PIKA_HELP_CONTROLLER_WHEEL;
controller_class->icon_name = PIKA_ICON_CONTROLLER_WHEEL;
controller_class->get_n_events = pika_controller_wheel_get_n_events;
controller_class->get_event_name = pika_controller_wheel_get_event_name;
controller_class->get_event_blurb = pika_controller_wheel_get_event_blurb;
}
static void
pika_controller_wheel_init (PikaControllerWheel *wheel)
{
static gboolean events_initialized = FALSE;
if (! events_initialized)
{
GdkKeymap *keymap = gdk_keymap_get_for_display (gdk_display_get_default ());
gint i;
for (i = 0; i < G_N_ELEMENTS (wheel_events); i++)
{
WheelEvent *wevent = &wheel_events[i];
if (wevent->modifier_string)
{
gtk_accelerator_parse (wevent->modifier_string, NULL,
&wevent->modifiers);
gdk_keymap_map_virtual_modifiers (keymap, &wevent->modifiers);
}
if (wevent->modifiers != 0)
{
wevent->blurb =
g_strdup_printf ("%s (%s)", gettext (wevent->blurb),
pika_get_mod_string (wevent->modifiers));
}
else
{
wevent->blurb = gettext (wevent->blurb);
}
}
events_initialized = TRUE;
}
}
static void
pika_controller_wheel_constructed (GObject *object)
{
G_OBJECT_CLASS (parent_class)->constructed (object);
g_object_set (object,
"name", _("Mouse Wheel Events"),
"state", _("Ready"),
NULL);
}
static gint
pika_controller_wheel_get_n_events (PikaController *controller)
{
return G_N_ELEMENTS (wheel_events);
}
static const gchar *
pika_controller_wheel_get_event_name (PikaController *controller,
gint event_id)
{
if (event_id < 0 || event_id >= G_N_ELEMENTS (wheel_events))
return NULL;
return wheel_events[event_id].name;
}
static const gchar *
pika_controller_wheel_get_event_blurb (PikaController *controller,
gint event_id)
{
if (event_id < 0 || event_id >= G_N_ELEMENTS (wheel_events))
return NULL;
return wheel_events[event_id].blurb;
}
gboolean
pika_controller_wheel_scroll (PikaControllerWheel *wheel,
const GdkEventScroll *sevent)
{
GdkScrollDirection direction;
GdkModifierType state;
gint i;
g_return_val_if_fail (PIKA_IS_CONTROLLER_WHEEL (wheel), FALSE);
g_return_val_if_fail (sevent != NULL, FALSE);
gdk_event_get_state ((const GdkEvent *) sevent, &state);
if (! gdk_event_get_scroll_direction ((const GdkEvent *) sevent, &direction))
{
gdouble dx = 0.0;
gdouble dy = 0.0;
if (! gdk_event_get_scroll_deltas ((const GdkEvent *) sevent, &dx, &dy))
return FALSE;
if (dy <= -1.0)
direction = GDK_SCROLL_UP;
else if (dy >= 1.0)
direction = GDK_SCROLL_DOWN;
else if (dx <= -1.0)
direction = GDK_SCROLL_LEFT;
else if (dx >= 1.0)
direction = GDK_SCROLL_RIGHT;
else
return FALSE;
}
/* start with the last event because the last ones in the
* up,down,left,right groups have the most keyboard modifiers
*/
for (i = G_N_ELEMENTS (wheel_events) - 1; i >= 0; i--)
{
if (wheel_events[i].direction == direction &&
(wheel_events[i].modifiers & state) ==
wheel_events[i].modifiers)
{
PikaControllerEvent controller_event;
PikaControllerEventTrigger *trigger;
trigger = (PikaControllerEventTrigger *) &controller_event;
trigger->type = PIKA_CONTROLLER_EVENT_TRIGGER;
trigger->source = PIKA_CONTROLLER (wheel);
trigger->event_id = i;
return pika_controller_event (PIKA_CONTROLLER (wheel),
&controller_event);
}
}
return FALSE;
}
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