Adding upstream version 2.10.36.upstream/2.10.36

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

1 files changed, 393 insertions, 0 deletions

diff --git a/app/widgets/gimppolar.c b/app/widgets/gimppolar.c
new file mode 100644
index 0000000..c621507
--- /dev/null
+++ b/app/widgets/gimppolar.c
@@ -0,0 +1,393 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppolar.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 "core/gimp-cairo.h"
+
+#include "gimppolar.h"
+
+
+enum
+{
+  PROP_0,
+  PROP_ANGLE,
+  PROP_RADIUS
+};
+
+typedef enum
+{
+  POLAR_TARGET_NONE   = 0,
+  POLAR_TARGET_CIRCLE = 1 << 0
+} PolarTarget;
+
+
+struct _GimpPolarPrivate
+{
+  gdouble      angle;
+  gdouble      radius;
+
+  PolarTarget  target;
+};
+
+
+static void        gimp_polar_set_property         (GObject            *object,
+                                                    guint               property_id,
+                                                    const GValue       *value,
+                                                    GParamSpec         *pspec);
+static void        gimp_polar_get_property         (GObject            *object,
+                                                    guint               property_id,
+                                                    GValue             *value,
+                                                    GParamSpec         *pspec);
+
+static gboolean    gimp_polar_expose_event         (GtkWidget          *widget,
+                                                    GdkEventExpose     *event);
+static gboolean    gimp_polar_button_press_event   (GtkWidget          *widget,
+                                                    GdkEventButton     *bevent);
+static gboolean    gimp_polar_motion_notify_event  (GtkWidget          *widget,
+                                                    GdkEventMotion     *mevent);
+
+static void        gimp_polar_reset_target         (GimpCircle         *circle);
+
+static void        gimp_polar_set_target           (GimpPolar           *polar,
+                                                    PolarTarget          target);
+
+static void        gimp_polar_draw_circle          (cairo_t            *cr,
+                                                    gint                size,
+                                                    gdouble             angle,
+                                                    gdouble             radius,
+                                                    PolarTarget         highlight);
+
+static gdouble     gimp_polar_normalize_angle      (gdouble             angle);
+static gdouble     gimp_polar_get_angle_distance   (gdouble             alpha,
+                                                    gdouble             beta);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpPolar, gimp_polar, GIMP_TYPE_CIRCLE)
+
+#define parent_class gimp_polar_parent_class
+
+
+static void
+gimp_polar_class_init (GimpPolarClass *klass)
+{
+  GObjectClass    *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass  *widget_class = GTK_WIDGET_CLASS (klass);
+  GimpCircleClass *circle_class = GIMP_CIRCLE_CLASS (klass);
+
+  object_class->get_property         = gimp_polar_get_property;
+  object_class->set_property         = gimp_polar_set_property;
+
+  widget_class->expose_event         = gimp_polar_expose_event;
+  widget_class->button_press_event   = gimp_polar_button_press_event;
+  widget_class->motion_notify_event  = gimp_polar_motion_notify_event;
+
+  circle_class->reset_target         = gimp_polar_reset_target;
+
+  g_object_class_install_property (object_class, PROP_ANGLE,
+                                   g_param_spec_double ("angle",
+                                                        NULL, NULL,
+                                                        0.0, 2 * G_PI, 0.0,
+                                                        GIMP_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT));
+
+  g_object_class_install_property (object_class, PROP_RADIUS,
+                                   g_param_spec_double ("radius",
+                                                        NULL, NULL,
+                                                        0.0, 1.0, 0.0,
+                                                        GIMP_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT));
+}
+
+static void
+gimp_polar_init (GimpPolar *polar)
+{
+  polar->priv = gimp_polar_get_instance_private (polar);
+}
+
+static void
+gimp_polar_set_property (GObject      *object,
+                         guint         property_id,
+                         const GValue *value,
+                         GParamSpec   *pspec)
+{
+  GimpPolar *polar = GIMP_POLAR (object);
+
+  switch (property_id)
+    {
+    case PROP_ANGLE:
+      polar->priv->angle = g_value_get_double (value);
+      gtk_widget_queue_draw (GTK_WIDGET (polar));
+      break;
+
+    case PROP_RADIUS:
+      polar->priv->radius = g_value_get_double (value);
+      gtk_widget_queue_draw (GTK_WIDGET (polar));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_polar_get_property (GObject    *object,
+                         guint       property_id,
+                         GValue     *value,
+                         GParamSpec *pspec)
+{
+  GimpPolar *polar = GIMP_POLAR (object);
+
+  switch (property_id)
+    {
+    case PROP_ANGLE:
+      g_value_set_double (value, polar->priv->angle);
+      break;
+
+    case PROP_RADIUS:
+      g_value_set_double (value, polar->priv->radius);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static gboolean
+gimp_polar_expose_event (GtkWidget      *widget,
+                         GdkEventExpose *event)
+{
+  GimpPolar *polar = GIMP_POLAR (widget);
+
+  GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
+
+  if (gtk_widget_is_drawable (widget))
+    {
+      GtkAllocation  allocation;
+      gint           size;
+      cairo_t       *cr;
+
+      g_object_get (widget,
+                    "size", &size,
+                    NULL);
+
+      cr = gdk_cairo_create (event->window);
+      gdk_cairo_region (cr, event->region);
+      cairo_clip (cr);
+
+      gtk_widget_get_allocation (widget, &allocation);
+
+      cairo_translate (cr,
+                       (gdouble) allocation.x + (allocation.width  - size) / 2.0,
+                       (gdouble) allocation.y + (allocation.height - size) / 2.0);
+
+      gimp_polar_draw_circle (cr, size,
+                              polar->priv->angle, polar->priv->radius,
+                              polar->priv->target);
+
+      cairo_destroy (cr);
+    }
+
+  return FALSE;
+}
+
+static gboolean
+gimp_polar_button_press_event (GtkWidget      *widget,
+                               GdkEventButton *bevent)
+{
+  GimpPolar *polar = GIMP_POLAR (widget);
+
+  if (bevent->type == GDK_BUTTON_PRESS &&
+      bevent->button == 1              &&
+      polar->priv->target != POLAR_TARGET_NONE)
+    {
+      gdouble angle;
+      gdouble radius;
+
+      GTK_WIDGET_CLASS (parent_class)->button_press_event (widget, bevent);
+
+      angle = _gimp_circle_get_angle_and_distance (GIMP_CIRCLE (polar),
+                                                   bevent->x, bevent->y,
+                                                   &radius);
+      radius = MIN (radius, 1.0);
+
+      g_object_set (polar,
+                    "angle",  angle,
+                    "radius", radius,
+                    NULL);
+    }
+
+  return FALSE;
+}
+
+static gboolean
+gimp_polar_motion_notify_event (GtkWidget      *widget,
+                                GdkEventMotion *mevent)
+{
+  GimpPolar *polar = GIMP_POLAR (widget);
+  gdouble    angle;
+  gdouble    radius;
+
+  angle = _gimp_circle_get_angle_and_distance (GIMP_CIRCLE (polar),
+                                               mevent->x, mevent->y,
+                                               &radius);
+
+  if (_gimp_circle_has_grab (GIMP_CIRCLE (polar)))
+    {
+      radius = MIN (radius, 1.0);
+
+      g_object_set (polar,
+                    "angle",  angle,
+                    "radius", radius,
+                    NULL);
+    }
+  else
+    {
+      PolarTarget target;
+      gdouble     dist_angle;
+      gdouble     dist_radius;
+
+      dist_angle  = gimp_polar_get_angle_distance (polar->priv->angle, angle);
+      dist_radius = ABS (polar->priv->radius - radius);
+
+      if ((radius < 0.2 && polar->priv->radius < 0.2) ||
+          (dist_angle  < (G_PI / 12) && dist_radius < 0.2))
+        {
+          target = POLAR_TARGET_CIRCLE;
+        }
+      else
+        {
+          target = POLAR_TARGET_NONE;
+        }
+
+      gimp_polar_set_target (polar, target);
+    }
+
+  gdk_event_request_motions (mevent);
+
+  return FALSE;
+}
+
+static void
+gimp_polar_reset_target (GimpCircle *circle)
+{
+  gimp_polar_set_target (GIMP_POLAR (circle), POLAR_TARGET_NONE);
+}
+
+
+/*  public functions  */
+
+GtkWidget *
+gimp_polar_new (void)
+{
+  return g_object_new (GIMP_TYPE_POLAR, NULL);
+}
+
+
+/*  private functions  */
+
+static void
+gimp_polar_set_target (GimpPolar   *polar,
+                       PolarTarget  target)
+{
+  if (target != polar->priv->target)
+    {
+      polar->priv->target = target;
+      gtk_widget_queue_draw (GTK_WIDGET (polar));
+    }
+}
+
+static void
+gimp_polar_draw_circle (cairo_t     *cr,
+                        gint         size,
+                        gdouble      angle,
+                        gdouble      radius,
+                        PolarTarget  highlight)
+{
+  gdouble r = size / 2.0 - 2.0; /* half the broad line with and half a px */
+  gdouble x = r + r * radius * cos (angle);
+  gdouble y = r - r * radius * sin (angle);
+
+  cairo_save (cr);
+
+  cairo_translate (cr, 2.0, 2.0); /* half the broad line width and half a px*/
+
+  cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
+  cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
+
+  cairo_arc (cr, x, y, 3, 0, 2 * G_PI);
+
+  if (highlight == POLAR_TARGET_NONE)
+    {
+      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
+    {
+      cairo_set_line_width (cr, 3.0);
+      cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.6);
+      cairo_stroke_preserve (cr);
+
+      cairo_set_line_width (cr, 1.0);
+      cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.8);
+      cairo_stroke (cr);
+    }
+
+  cairo_restore (cr);
+}
+
+static gdouble
+gimp_polar_normalize_angle (gdouble angle)
+{
+  if (angle < 0)
+    return angle + 2 * G_PI;
+  else if (angle > 2 * G_PI)
+    return angle - 2 * G_PI;
+  else
+    return angle;
+}
+
+static gdouble
+gimp_polar_get_angle_distance (gdouble alpha,
+                               gdouble beta)
+{
+  return ABS (MIN (gimp_polar_normalize_angle (alpha - beta),
+                   2 * G_PI - gimp_polar_normalize_angle (alpha - beta)));
+}