1 files changed, 293 insertions, 0 deletions
diff --git a/app/widgets/gimpcontrollerwheel.c b/app/widgets/gimpcontrollerwheel.c
new file mode 100644
index 0000000..977543d
--- /dev/null
+++ b/app/widgets/gimpcontrollerwheel.c
@@ -0,0 +1,293 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpcontrollerwheel.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>
+#undef GDK_MULTIHEAD_SAFE /* for gdk_keymap_get_default() */
+#include <gtk/gtk.h>
+
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "widgets-types.h"
+
+#include "gimpcontrollerwheel.h"
+#include "gimphelp-ids.h"
+#include "gimpwidgets-utils.h"
+
+#include "gimp-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          gimp_controller_wheel_constructed     (GObject        *object);
+
+static gint          gimp_controller_wheel_get_n_events    (GimpController *controller);
+static const gchar * gimp_controller_wheel_get_event_name  (GimpController *controller,
+                                                            gint            event_id);
+static const gchar * gimp_controller_wheel_get_event_blurb (GimpController *controller,
+                                                            gint            event_id);
+
+
+G_DEFINE_TYPE (GimpControllerWheel, gimp_controller_wheel,
+               GIMP_TYPE_CONTROLLER)
+
+#define parent_class gimp_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
+gimp_controller_wheel_class_init (GimpControllerWheelClass *klass)
+{
+  GObjectClass        *object_class     = G_OBJECT_CLASS (klass);
+  GimpControllerClass *controller_class = GIMP_CONTROLLER_CLASS (klass);
+
+  object_class->constructed         = gimp_controller_wheel_constructed;
+
+  controller_class->name            = _("Mouse Wheel");
+  controller_class->help_id         = GIMP_HELP_CONTROLLER_WHEEL;
+  controller_class->icon_name       = GIMP_ICON_CONTROLLER_WHEEL;
+
+  controller_class->get_n_events    = gimp_controller_wheel_get_n_events;
+  controller_class->get_event_name  = gimp_controller_wheel_get_event_name;
+  controller_class->get_event_blurb = gimp_controller_wheel_get_event_blurb;
+}
+
+static void
+gimp_controller_wheel_init (GimpControllerWheel *wheel)
+{
+  static gboolean events_initialized = FALSE;
+
+  if (! events_initialized)
+    {
+      GdkKeymap *keymap = gdk_keymap_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),
+                                 gimp_get_mod_string (wevent->modifiers));
+            }
+          else
+            {
+              wevent->blurb = gettext (wevent->blurb);
+            }
+        }
+
+      events_initialized = TRUE;
+    }
+}
+
+static void
+gimp_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
+gimp_controller_wheel_get_n_events (GimpController *controller)
+{
+  return G_N_ELEMENTS (wheel_events);
+}
+
+static const gchar *
+gimp_controller_wheel_get_event_name (GimpController *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 *
+gimp_controller_wheel_get_event_blurb (GimpController *controller,
+                                       gint            event_id)
+{
+  if (event_id < 0 || event_id >= G_N_ELEMENTS (wheel_events))
+    return NULL;
+
+  return wheel_events[event_id].blurb;
+}
+
+gboolean
+gimp_controller_wheel_scroll (GimpControllerWheel  *wheel,
+                              const GdkEventScroll *sevent)
+{
+  gint i;
+
+  g_return_val_if_fail (GIMP_IS_CONTROLLER_WHEEL (wheel), FALSE);
+  g_return_val_if_fail (sevent != NULL, 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 == sevent->direction &&
+          (wheel_events[i].modifiers & sevent->state) ==
+          wheel_events[i].modifiers)
+        {
+          GimpControllerEvent         controller_event;
+          GimpControllerEventTrigger *trigger;
+
+          trigger = (GimpControllerEventTrigger *) &controller_event;
+
+          trigger->type     = GIMP_CONTROLLER_EVENT_TRIGGER;
+          trigger->source   = GIMP_CONTROLLER (wheel);
+          trigger->event_id = i;
+
+          return gimp_controller_event (GIMP_CONTROLLER (wheel),
+                                        &controller_event);
+        }
+    }
+
+  return FALSE;
+}