Adding upstream version 2.10.22.upstream/2.10.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 589 insertions, 0 deletions

diff --git a/app/widgets/gimpcircle.c b/app/widgets/gimpcircle.c
new file mode 100644
index 0000000..407d9e7
--- /dev/null
+++ b/app/widgets/gimpcircle.c
@@ -0,0 +1,589 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcircle.c
+ * Copyright (C) 2014 Michael Natterer <mitch@gimp.org>
+ *
+ * Based on code from the color-rotate plug-in
+ * Copyright (C) 1997-1999 Sven Anders (anderss@fmi.uni-passau.de)
+ *                         Based on code from Pavel Grinfeld (pavel@ml.com)
+ *
+ * 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 "libgimpmath/gimpmath.h"
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "widgets-types.h"
+
+#include "gimpcircle.h"
+
+
+enum
+{
+  PROP_0,
+  PROP_SIZE,
+  PROP_BORDER_WIDTH,
+  PROP_BACKGROUND
+};
+
+
+struct _GimpCirclePrivate
+{
+  gint                  size;
+  gint                  border_width;
+  GimpCircleBackground  background;
+
+  GdkWindow            *event_window;
+  cairo_surface_t      *surface;
+  gboolean              has_grab;
+  gboolean              in_widget;
+};
+
+
+static void        gimp_circle_dispose              (GObject              *object);
+static void        gimp_circle_set_property         (GObject              *object,
+                                                     guint                 property_id,
+                                                     const GValue         *value,
+                                                     GParamSpec           *pspec);
+static void        gimp_circle_get_property         (GObject              *object,
+                                                     guint                 property_id,
+                                                     GValue               *value,
+                                                     GParamSpec           *pspec);
+
+static void        gimp_circle_realize              (GtkWidget            *widget);
+static void        gimp_circle_unrealize            (GtkWidget            *widget);
+static void        gimp_circle_map                  (GtkWidget            *widget);
+static void        gimp_circle_unmap                (GtkWidget            *widget);
+static void        gimp_circle_size_request         (GtkWidget            *widget,
+                                                     GtkRequisition       *requisition);
+static void        gimp_circle_size_allocate        (GtkWidget            *widget,
+                                                     GtkAllocation        *allocation);
+static gboolean    gimp_circle_expose_event         (GtkWidget            *widget,
+                                                     GdkEventExpose       *event);
+static gboolean    gimp_circle_button_press_event   (GtkWidget            *widget,
+                                                     GdkEventButton       *bevent);
+static gboolean    gimp_circle_button_release_event (GtkWidget            *widget,
+                                                     GdkEventButton       *bevent);
+static gboolean    gimp_circle_enter_notify_event   (GtkWidget            *widget,
+                                                     GdkEventCrossing     *event);
+static gboolean    gimp_circle_leave_notify_event   (GtkWidget            *widget,
+                                                     GdkEventCrossing     *event);
+
+static void        gimp_circle_real_reset_target    (GimpCircle           *circle);
+
+static void        gimp_circle_background_hsv       (gdouble               angle,
+                                                     gdouble               distance,
+                                                     guchar               *rgb);
+
+static void        gimp_circle_draw_background      (GimpCircle           *circle,
+                                                     cairo_t              *cr,
+                                                     gint                  size,
+                                                     GimpCircleBackground  background);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpCircle, gimp_circle, GTK_TYPE_WIDGET)
+
+#define parent_class gimp_circle_parent_class
+
+
+static void
+gimp_circle_class_init (GimpCircleClass *klass)
+{
+  GObjectClass   *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  object_class->dispose              = gimp_circle_dispose;
+  object_class->get_property         = gimp_circle_get_property;
+  object_class->set_property         = gimp_circle_set_property;
+
+  widget_class->realize              = gimp_circle_realize;
+  widget_class->unrealize            = gimp_circle_unrealize;
+  widget_class->map                  = gimp_circle_map;
+  widget_class->unmap                = gimp_circle_unmap;
+  widget_class->size_request         = gimp_circle_size_request;
+  widget_class->size_allocate        = gimp_circle_size_allocate;
+  widget_class->expose_event         = gimp_circle_expose_event;
+  widget_class->button_press_event   = gimp_circle_button_press_event;
+  widget_class->button_release_event = gimp_circle_button_release_event;
+  widget_class->enter_notify_event   = gimp_circle_enter_notify_event;
+  widget_class->leave_notify_event   = gimp_circle_leave_notify_event;
+
+  klass->reset_target                = gimp_circle_real_reset_target;
+
+  g_object_class_install_property (object_class, PROP_SIZE,
+                                   g_param_spec_int ("size",
+                                                     NULL, NULL,
+                                                     32, 1024, 96,
+                                                     GIMP_PARAM_READWRITE |
+                                                     G_PARAM_CONSTRUCT));
+
+  g_object_class_install_property (object_class, PROP_BORDER_WIDTH,
+                                   g_param_spec_int ("border-width",
+                                                     NULL, NULL,
+                                                     0, 64, 0,
+                                                     GIMP_PARAM_READWRITE |
+                                                     G_PARAM_CONSTRUCT));
+
+  g_object_class_install_property (object_class, PROP_BACKGROUND,
+                                   g_param_spec_enum ("background",
+                                                      NULL, NULL,
+                                                      GIMP_TYPE_CIRCLE_BACKGROUND,
+                                                      GIMP_CIRCLE_BACKGROUND_HSV,
+                                                      GIMP_PARAM_READWRITE |
+                                                      G_PARAM_CONSTRUCT));
+}
+
+static void
+gimp_circle_init (GimpCircle *circle)
+{
+  circle->priv = gimp_circle_get_instance_private (circle);
+
+  gtk_widget_set_has_window (GTK_WIDGET (circle), FALSE);
+  gtk_widget_add_events (GTK_WIDGET (circle),
+                         GDK_POINTER_MOTION_MASK |
+                         GDK_BUTTON_PRESS_MASK   |
+                         GDK_BUTTON_RELEASE_MASK |
+                         GDK_BUTTON1_MOTION_MASK |
+                         GDK_ENTER_NOTIFY_MASK   |
+                         GDK_LEAVE_NOTIFY_MASK);
+}
+
+static void
+gimp_circle_dispose (GObject *object)
+{
+  GimpCircle *circle = GIMP_CIRCLE (object);
+
+  g_clear_pointer (&circle->priv->surface, cairo_surface_destroy);
+
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gimp_circle_set_property (GObject      *object,
+                          guint         property_id,
+                          const GValue *value,
+                          GParamSpec   *pspec)
+{
+  GimpCircle *circle = GIMP_CIRCLE (object);
+
+  switch (property_id)
+    {
+    case PROP_SIZE:
+      circle->priv->size = g_value_get_int (value);
+      gtk_widget_queue_resize (GTK_WIDGET (circle));
+      break;
+
+    case PROP_BORDER_WIDTH:
+      circle->priv->border_width = g_value_get_int (value);
+      gtk_widget_queue_resize (GTK_WIDGET (circle));
+      break;
+
+    case PROP_BACKGROUND:
+      circle->priv->background = g_value_get_enum (value);
+      g_clear_pointer (&circle->priv->surface, cairo_surface_destroy);
+      gtk_widget_queue_draw (GTK_WIDGET (circle));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_circle_get_property (GObject    *object,
+                          guint       property_id,
+                          GValue     *value,
+                          GParamSpec *pspec)
+{
+  GimpCircle *circle = GIMP_CIRCLE (object);
+
+  switch (property_id)
+    {
+    case PROP_SIZE:
+      g_value_set_int (value, circle->priv->size);
+      break;
+
+    case PROP_BORDER_WIDTH:
+      g_value_set_int (value, circle->priv->border_width);
+      break;
+
+    case PROP_BACKGROUND:
+      g_value_set_enum (value, circle->priv->background);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_circle_realize (GtkWidget *widget)
+{
+  GimpCircle    *circle = GIMP_CIRCLE (widget);
+  GtkAllocation  allocation;
+  GdkWindowAttr  attributes;
+  gint           attributes_mask;
+
+  GTK_WIDGET_CLASS (parent_class)->realize (widget);
+
+  gtk_widget_get_allocation (widget, &allocation);
+
+  attributes.window_type = GDK_WINDOW_CHILD;
+  attributes.x           = allocation.x;
+  attributes.y           = allocation.y;
+  attributes.width       = allocation.width;
+  attributes.height      = allocation.height;
+  attributes.wclass      = GDK_INPUT_ONLY;
+  attributes.event_mask  = gtk_widget_get_events (widget);
+
+  attributes_mask = GDK_WA_X | GDK_WA_Y;
+
+  circle->priv->event_window = gdk_window_new (gtk_widget_get_window (widget),
+                                               &attributes, attributes_mask);
+  gdk_window_set_user_data (circle->priv->event_window, circle);
+}
+
+static void
+gimp_circle_unrealize (GtkWidget *widget)
+{
+  GimpCircle *circle = GIMP_CIRCLE (widget);
+
+  if (circle->priv->event_window)
+    {
+      gdk_window_set_user_data (circle->priv->event_window, NULL);
+      gdk_window_destroy (circle->priv->event_window);
+      circle->priv->event_window = NULL;
+    }
+
+  GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
+}
+
+static void
+gimp_circle_map (GtkWidget *widget)
+{
+  GimpCircle *circle = GIMP_CIRCLE (widget);
+
+  GTK_WIDGET_CLASS (parent_class)->map (widget);
+
+  if (circle->priv->event_window)
+    gdk_window_show (circle->priv->event_window);
+}
+
+static void
+gimp_circle_unmap (GtkWidget *widget)
+{
+  GimpCircle *circle = GIMP_CIRCLE (widget);
+
+  if (circle->priv->has_grab)
+    {
+      gtk_grab_remove (widget);
+      circle->priv->has_grab = FALSE;
+    }
+
+  if (circle->priv->event_window)
+    gdk_window_hide (circle->priv->event_window);
+
+  GTK_WIDGET_CLASS (parent_class)->unmap (widget);
+}
+
+static void
+gimp_circle_size_request (GtkWidget      *widget,
+                        GtkRequisition *requisition)
+{
+  GimpCircle *circle = GIMP_CIRCLE (widget);
+
+  requisition->width  = 2 * circle->priv->border_width + circle->priv->size;
+  requisition->height = 2 * circle->priv->border_width + circle->priv->size;
+}
+
+static void
+gimp_circle_size_allocate (GtkWidget     *widget,
+                           GtkAllocation *allocation)
+{
+  GimpCircle *circle = GIMP_CIRCLE (widget);
+
+  GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);
+
+  if (gtk_widget_get_realized (widget))
+    gdk_window_move_resize (circle->priv->event_window,
+                            allocation->x,
+                            allocation->y,
+                            allocation->width,
+                            allocation->height);
+
+  g_clear_pointer (&circle->priv->surface, cairo_surface_destroy);
+}
+
+static gboolean
+gimp_circle_expose_event (GtkWidget      *widget,
+                          GdkEventExpose *event)
+{
+  GimpCircle *circle = GIMP_CIRCLE (widget);
+
+  if (gtk_widget_is_drawable (widget))
+    {
+      GtkAllocation  allocation;
+      gint           size = circle->priv->size;
+      cairo_t       *cr;
+
+      cr = gdk_cairo_create (event->window);
+      gdk_cairo_region (cr, event->region);
+      cairo_clip (cr);
+
+      gtk_widget_get_allocation (widget, &allocation);
+
+      cairo_translate (cr,
+                       allocation.x + (allocation.width  - size) / 2,
+                       allocation.y + (allocation.height - size) / 2);
+
+      gimp_circle_draw_background (circle, cr, size, circle->priv->background);
+
+      cairo_destroy (cr);
+    }
+
+  return FALSE;
+}
+
+static gboolean
+gimp_circle_button_press_event (GtkWidget      *widget,
+                                GdkEventButton *bevent)
+{
+  GimpCircle *circle = GIMP_CIRCLE (widget);
+
+  if (bevent->type == GDK_BUTTON_PRESS &&
+      bevent->button == 1)
+    {
+      gtk_grab_add (widget);
+      circle->priv->has_grab = TRUE;
+    }
+
+  return FALSE;
+}
+
+static gboolean
+gimp_circle_button_release_event (GtkWidget      *widget,
+                                  GdkEventButton *bevent)
+{
+  GimpCircle *circle = GIMP_CIRCLE (widget);
+
+  if (bevent->button == 1)
+    {
+      gtk_grab_remove (widget);
+      circle->priv->has_grab = FALSE;
+
+      if (! circle->priv->in_widget)
+        GIMP_CIRCLE_GET_CLASS (circle)->reset_target (circle);
+    }
+
+  return FALSE;
+}
+
+static gboolean
+gimp_circle_enter_notify_event (GtkWidget        *widget,
+                                GdkEventCrossing *event)
+{
+  GimpCircle *circle = GIMP_CIRCLE (widget);
+
+  circle->priv->in_widget = TRUE;
+
+  return FALSE;
+}
+
+static gboolean
+gimp_circle_leave_notify_event (GtkWidget        *widget,
+                                GdkEventCrossing *event)
+{
+  GimpCircle *circle = GIMP_CIRCLE (widget);
+
+  circle->priv->in_widget = FALSE;
+
+  if (! circle->priv->has_grab)
+    GIMP_CIRCLE_GET_CLASS (circle)->reset_target (circle);
+
+  return FALSE;
+}
+
+static void
+gimp_circle_real_reset_target (GimpCircle *circle)
+{
+}
+
+
+/*  public functions  */
+
+GtkWidget *
+gimp_circle_new (void)
+{
+  return g_object_new (GIMP_TYPE_CIRCLE, NULL);
+}
+
+
+/*  protected functions  */
+
+static gdouble
+get_angle_and_distance (gdouble  center_x,
+                        gdouble  center_y,
+                        gdouble  radius,
+                        gdouble  x,
+                        gdouble  y,
+                        gdouble *distance)
+{
+  gdouble angle = atan2 (center_y - y,
+                         x - center_x);
+
+  if (angle < 0)
+    angle += 2 * G_PI;
+
+  if (distance)
+    *distance = sqrt ((SQR (x - center_x) +
+                       SQR (y - center_y)) / SQR (radius));
+
+  return angle;
+}
+
+gboolean
+_gimp_circle_has_grab (GimpCircle *circle)
+{
+  g_return_val_if_fail (GIMP_IS_CIRCLE (circle), FALSE);
+
+  return circle->priv->has_grab;
+}
+
+gdouble
+_gimp_circle_get_angle_and_distance (GimpCircle *circle,
+                                     gdouble     event_x,
+                                     gdouble     event_y,
+                                     gdouble    *distance)
+{
+  GtkAllocation allocation;
+  gdouble       center_x;
+  gdouble       center_y;
+
+  g_return_val_if_fail (GIMP_IS_CIRCLE (circle), 0.0);
+
+  gtk_widget_get_allocation (GTK_WIDGET (circle), &allocation);
+
+  center_x = allocation.width  / 2.0;
+  center_y = allocation.height / 2.0;
+
+  return get_angle_and_distance (center_x, center_y, circle->priv->size / 2.0,
+                                 event_x, event_y,
+                                 distance);
+}
+
+
+/*  private functions  */
+
+static void
+gimp_circle_background_hsv (gdouble  angle,
+                            gdouble  distance,
+                            guchar  *rgb)
+{
+  GimpHSV hsv;
+  GimpRGB color;
+
+  gimp_hsv_set (&hsv,
+                angle / (2.0 * G_PI),
+                distance,
+                1 - sqrt (distance) / 4 /* it just looks nicer this way */);
+
+  gimp_hsv_to_rgb (&hsv, &color);
+
+  gimp_rgb_get_uchar (&color, rgb, rgb + 1, rgb + 2);
+}
+
+static void
+gimp_circle_draw_background (GimpCircle           *circle,
+                             cairo_t              *cr,
+                             gint                  size,
+                             GimpCircleBackground  background)
+{
+  cairo_save (cr);
+
+  if (background == GIMP_CIRCLE_BACKGROUND_PLAIN)
+    {
+      cairo_arc (cr, size / 2.0, size / 2.0, size / 2.0 - 1.5, 0.0, 2 * G_PI);
+
+      cairo_set_line_width (cr, 3.0);
+      cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);
+      cairo_stroke_preserve (cr);
+
+      cairo_set_line_width (cr, 1.0);
+      cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8);
+      cairo_stroke (cr);
+    }
+  else
+    {
+      if (! circle->priv->surface)
+        {
+          guchar *data;
+          gint    stride;
+          gint    x, y;
+
+          circle->priv->surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
+                                                              size, size);
+
+          data   = cairo_image_surface_get_data (circle->priv->surface);
+          stride = cairo_image_surface_get_stride (circle->priv->surface);
+
+          for (y = 0; y < size; y++)
+            {
+              for (x = 0; x < size; x++)
+                {
+                  gdouble angle;
+                  gdouble distance;
+                  guchar  rgb[3] = { 0, };
+
+                  angle = get_angle_and_distance (size / 2.0, size / 2.0,
+                                                  size / 2.0,
+                                                  x, y,
+                                                  &distance);
+
+                  switch (background)
+                    {
+                    case GIMP_CIRCLE_BACKGROUND_HSV:
+                      gimp_circle_background_hsv (angle, distance, rgb);
+                      break;
+
+                    default:
+                      break;
+                    }
+
+                  GIMP_CAIRO_ARGB32_SET_PIXEL (data + y * stride + x * 4,
+                                               rgb[0], rgb[1], rgb[2], 255);
+                }
+            }
+
+          cairo_surface_mark_dirty (circle->priv->surface);
+        }
+
+      cairo_set_source_surface (cr, circle->priv->surface, 0.0, 0.0);
+
+      cairo_arc (cr, size / 2.0, size / 2.0, size / 2.0, 0.0, 2 * G_PI);
+      cairo_clip (cr);
+
+      cairo_paint (cr);
+    }
+
+  cairo_restore (cr);
+}