Adding upstream version 2.10.36.upstream/2.10.36

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

1 files changed, 628 insertions, 0 deletions

diff --git a/libgimp/gimpgradientselectbutton.c b/libgimp/gimpgradientselectbutton.c
new file mode 100644
index 0000000..fac6e3a
--- /dev/null
+++ b/libgimp/gimpgradientselectbutton.c
@@ -0,0 +1,628 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpgradientselectbutton.c
+ * Copyright (C) 1998 Andy Thomas
+ *
+ * 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 3 of the License, 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
+ * Library 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
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "gimp.h"
+
+#include "gimpuitypes.h"
+#include "gimpgradientselectbutton.h"
+#include "gimpuimarshal.h"
+
+#include "libgimp-intl.h"
+
+
+/**
+ * SECTION: gimpgradientselectbutton
+ * @title: GimpGradientSelectButton
+ * @short_description: A button which pops up a gradient select dialog.
+ *
+ * A button which pops up a gradient select dialog.
+ **/
+
+
+#define CELL_HEIGHT 18
+#define CELL_WIDTH  84
+
+
+#define GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE(obj) ((GimpGradientSelectButtonPrivate *) gimp_gradient_select_button_get_instance_private ((GimpGradientSelectButton *) (obj)))
+
+typedef struct _GimpGradientSelectButtonPrivate GimpGradientSelectButtonPrivate;
+
+struct _GimpGradientSelectButtonPrivate
+{
+  gchar     *title;
+
+  gchar     *gradient_name;      /* Local copy */
+  gint       sample_size;
+  gboolean   reverse;
+  gint       n_samples;
+  gdouble   *gradient_data;      /* Local copy */
+
+  GtkWidget *inside;
+  GtkWidget *preview;
+};
+
+enum
+{
+  GRADIENT_SET,
+  LAST_SIGNAL
+};
+
+enum
+{
+  PROP_0,
+  PROP_TITLE,
+  PROP_GRADIENT_NAME
+};
+
+
+/*  local function prototypes  */
+
+static void   gimp_gradient_select_button_finalize     (GObject      *object);
+
+static void   gimp_gradient_select_button_set_property (GObject      *object,
+                                                        guint         property_id,
+                                                        const GValue *value,
+                                                        GParamSpec   *pspec);
+static void   gimp_gradient_select_button_get_property (GObject      *object,
+                                                        guint         property_id,
+                                                        GValue       *value,
+                                                        GParamSpec   *pspec);
+
+static void   gimp_gradient_select_button_clicked  (GimpGradientSelectButton *button);
+
+static void   gimp_gradient_select_button_callback (const gchar   *gradient_name,
+                                                    gint           n_samples,
+                                                    const gdouble *gradient_data,
+                                                    gboolean       dialog_closing,
+                                                    gpointer       user_data);
+
+static void gimp_gradient_select_preview_size_allocate
+                                                 (GtkWidget                *widget,
+                                                  GtkAllocation            *allocation,
+                                                  GimpGradientSelectButton *button);
+static gboolean gimp_gradient_select_preview_expose   (GtkWidget                *preview,
+                                                       GdkEventExpose           *event,
+                                                       GimpGradientSelectButton *button);
+
+static void   gimp_gradient_select_drag_data_received (GimpGradientSelectButton *button,
+                                                       GdkDragContext           *context,
+                                                       gint                      x,
+                                                       gint                      y,
+                                                       GtkSelectionData         *selection,
+                                                       guint                     info,
+                                                       guint                     time);
+
+static GtkWidget * gimp_gradient_select_button_create_inside (GimpGradientSelectButton *button);
+
+
+static const GtkTargetEntry target = { "application/x-gimp-gradient-name", 0 };
+
+static guint gradient_button_signals[LAST_SIGNAL] = { 0 };
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpGradientSelectButton,
+                            gimp_gradient_select_button,
+                            GIMP_TYPE_SELECT_BUTTON)
+
+
+static void
+gimp_gradient_select_button_class_init (GimpGradientSelectButtonClass *klass)
+{
+  GObjectClass          *object_class        = G_OBJECT_CLASS (klass);
+  GimpSelectButtonClass *select_button_class = GIMP_SELECT_BUTTON_CLASS (klass);
+
+  object_class->finalize     = gimp_gradient_select_button_finalize;
+  object_class->set_property = gimp_gradient_select_button_set_property;
+  object_class->get_property = gimp_gradient_select_button_get_property;
+
+  select_button_class->select_destroy = gimp_gradient_select_destroy;
+
+  klass->gradient_set = NULL;
+
+  /**
+   * GimpGradientSelectButton:title:
+   *
+   * The title to be used for the gradient selection popup dialog.
+   *
+   * Since: 2.4
+   */
+  g_object_class_install_property (object_class, PROP_TITLE,
+                                   g_param_spec_string ("title",
+                                                        "Title",
+                                                        "The title to be used for the gradient selection popup dialog",
+                                                        _("Gradient Selection"),
+                                                        GIMP_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT_ONLY));
+
+  /**
+   * GimpGradientSelectButton:gradient-name:
+   *
+   * The name of the currently selected gradient.
+   *
+   * Since: 2.4
+   */
+  g_object_class_install_property (object_class, PROP_GRADIENT_NAME,
+                                   g_param_spec_string ("gradient-name",
+                                                        "Gradient name",
+                                                        "The name of the currently selected gradient",
+                                                        NULL,
+                                                        GIMP_PARAM_READWRITE));
+
+  /**
+   * GimpGradientSelectButton::gradient-set:
+   * @widget: the object which received the signal.
+   * @gradient_name: the name of the currently selected gradient.
+   * @width: width of the gradient
+   * @grad_data: gradient data
+   * @dialog_closing: whether the dialog was closed or not.
+   *
+   * The ::gradient-set signal is emitted when the user selects a gradient.
+   *
+   * Since: 2.4
+   */
+  gradient_button_signals[GRADIENT_SET] =
+    g_signal_new ("gradient-set",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GimpGradientSelectButtonClass, gradient_set),
+                  NULL, NULL,
+                  _gimpui_marshal_VOID__STRING_INT_POINTER_BOOLEAN,
+                  G_TYPE_NONE, 4,
+                  G_TYPE_STRING,
+                  G_TYPE_INT,
+                  G_TYPE_POINTER,
+                  G_TYPE_BOOLEAN);
+}
+
+static void
+gimp_gradient_select_button_init (GimpGradientSelectButton *button)
+{
+  GimpGradientSelectButtonPrivate *priv;
+
+  priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button);
+
+  priv->gradient_name = gimp_context_get_gradient ();
+  priv->sample_size = CELL_WIDTH;
+  priv->reverse = FALSE;
+
+  priv->inside = gimp_gradient_select_button_create_inside (button);
+  gtk_container_add (GTK_CONTAINER (button), priv->inside);
+}
+
+/**
+ * gimp_gradient_select_button_new:
+ * @title:         Title of the dialog to use or %NULL to use the default title.
+ * @gradient_name: Initial gradient name.
+ *
+ * Creates a new #GtkWidget that completely controls the selection of
+ * a gradient.  This widget is suitable for placement in a table in a
+ * plug-in dialog.
+ *
+ * Returns: A #GtkWidget that you can use in your UI.
+ *
+ * Since: 2.4
+ */
+GtkWidget *
+gimp_gradient_select_button_new (const gchar *title,
+                                 const gchar *gradient_name)
+{
+  GtkWidget *button;
+
+  if (title)
+    button = g_object_new (GIMP_TYPE_GRADIENT_SELECT_BUTTON,
+                                    "title",         title,
+                                    "gradient-name", gradient_name,
+                                    NULL);
+  else
+    button = g_object_new (GIMP_TYPE_GRADIENT_SELECT_BUTTON,
+                                    "gradient-name", gradient_name,
+                                    NULL);
+
+  return button;
+}
+
+/**
+ * gimp_gradient_select_button_get_gradient:
+ * @button: A #GimpGradientSelectButton
+ *
+ * Retrieves the name of currently selected gradient.
+ *
+ * Returns: an internal copy of the gradient name which must not be freed.
+ *
+ * Since: 2.4
+ */
+const gchar *
+gimp_gradient_select_button_get_gradient (GimpGradientSelectButton *button)
+{
+  GimpGradientSelectButtonPrivate *priv;
+
+  g_return_val_if_fail (GIMP_IS_GRADIENT_SELECT_BUTTON (button), NULL);
+
+  priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button);
+  return priv->gradient_name;
+}
+
+/**
+ * gimp_gradient_select_button_set_gradient:
+ * @button: A #GimpGradientSelectButton
+ * @gradient_name: Gradient name to set.
+ *
+ * Sets the current gradient for the gradient select button.
+ *
+ * Since: 2.4
+ */
+void
+gimp_gradient_select_button_set_gradient (GimpGradientSelectButton *button,
+                                          const gchar              *gradient_name)
+{
+  GimpGradientSelectButtonPrivate *priv;
+  GimpSelectButton                *select_button;
+
+  g_return_if_fail (GIMP_IS_GRADIENT_SELECT_BUTTON (button));
+
+  priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button);
+  select_button = GIMP_SELECT_BUTTON (button);
+
+  if (select_button->temp_callback)
+    {
+      gimp_gradients_set_popup (select_button->temp_callback, gradient_name);
+    }
+  else
+    {
+      gchar   *name;
+      gdouble *samples;
+      gint     n_samples;
+
+      if (gradient_name && *gradient_name)
+        name = g_strdup (gradient_name);
+      else
+        name = gimp_context_get_gradient ();
+
+      if (gimp_gradient_get_uniform_samples (name,
+                                             priv->sample_size,
+                                             priv->reverse,
+                                             &n_samples,
+                                             &samples))
+        {
+          gimp_gradient_select_button_callback (name,
+                                                n_samples, samples,
+                                                FALSE, button);
+
+          g_free (samples);
+        }
+
+      g_free (name);
+    }
+}
+
+
+/*  private functions  */
+
+static void
+gimp_gradient_select_button_finalize (GObject *object)
+{
+  GimpGradientSelectButtonPrivate *priv;
+
+  priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (object);
+
+  g_clear_pointer (&priv->gradient_name, g_free);
+  g_clear_pointer (&priv->gradient_data, g_free);
+  g_clear_pointer (&priv->title,         g_free);
+
+  G_OBJECT_CLASS (gimp_gradient_select_button_parent_class)->finalize (object);
+}
+
+static void
+gimp_gradient_select_button_set_property (GObject      *object,
+                                          guint         property_id,
+                                          const GValue *value,
+                                          GParamSpec   *pspec)
+{
+  GimpGradientSelectButton        *button;
+  GimpGradientSelectButtonPrivate *priv;
+
+  button = GIMP_GRADIENT_SELECT_BUTTON (object);
+  priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button);
+
+  switch (property_id)
+    {
+    case PROP_TITLE:
+      priv->title = g_value_dup_string (value);
+      break;
+    case PROP_GRADIENT_NAME:
+      gimp_gradient_select_button_set_gradient (button,
+                                                g_value_get_string (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_gradient_select_button_get_property (GObject    *object,
+                                          guint       property_id,
+                                          GValue     *value,
+                                          GParamSpec *pspec)
+{
+  GimpGradientSelectButton        *button;
+  GimpGradientSelectButtonPrivate *priv;
+
+  button = GIMP_GRADIENT_SELECT_BUTTON (object);
+  priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button);
+
+  switch (property_id)
+    {
+    case PROP_TITLE:
+      g_value_set_string (value, priv->title);
+      break;
+    case PROP_GRADIENT_NAME:
+      g_value_set_string (value, priv->gradient_name);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_gradient_select_button_callback (const gchar   *gradient_name,
+                                      gint           n_samples,
+                                      const gdouble *gradient_data,
+                                      gboolean       dialog_closing,
+                                      gpointer       user_data)
+{
+  GimpGradientSelectButton        *button;
+  GimpGradientSelectButtonPrivate *priv;
+  GimpSelectButton                *select_button;
+
+  button = GIMP_GRADIENT_SELECT_BUTTON (user_data);
+
+  priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button);
+  select_button = GIMP_SELECT_BUTTON (button);
+
+  g_free (priv->gradient_name);
+  g_free (priv->gradient_data);
+
+  priv->gradient_name = g_strdup (gradient_name);
+  priv->n_samples     = n_samples;
+  priv->gradient_data = g_memdup (gradient_data, n_samples * sizeof (gdouble));
+
+  gtk_widget_queue_draw (priv->preview);
+
+  if (dialog_closing)
+    select_button->temp_callback = NULL;
+
+  g_signal_emit (button, gradient_button_signals[GRADIENT_SET], 0,
+                 gradient_name, n_samples, gradient_data, dialog_closing);
+  g_object_notify (G_OBJECT (button), "gradient-name");
+}
+
+static void
+gimp_gradient_select_button_clicked (GimpGradientSelectButton *button)
+{
+  GimpGradientSelectButtonPrivate *priv;
+  GimpSelectButton                *select_button;
+
+  priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button);
+  select_button = GIMP_SELECT_BUTTON (button);
+
+  if (select_button->temp_callback)
+    {
+      /*  calling gimp_gradients_set_popup() raises the dialog  */
+      gimp_gradients_set_popup (select_button->temp_callback,
+                                priv->gradient_name);
+    }
+  else
+    {
+      select_button->temp_callback =
+        gimp_gradient_select_new (priv->title, priv->gradient_name,
+                                  priv->sample_size,
+                                  gimp_gradient_select_button_callback,
+                                  button);
+    }
+}
+
+static void
+gimp_gradient_select_preview_size_allocate (GtkWidget                *widget,
+                                            GtkAllocation            *allocation,
+                                            GimpGradientSelectButton *button)
+{
+  gdouble                         *samples;
+  gint                             n_samples;
+  GimpGradientSelectButtonPrivate *priv;
+
+  priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button);
+
+  if (gimp_gradient_get_uniform_samples (priv->gradient_name,
+                                         allocation->width,
+                                         priv->reverse,
+                                         &n_samples,
+                                         &samples))
+    {
+      g_free (priv->gradient_data);
+
+      priv->sample_size   = allocation->width;
+      priv->n_samples     = n_samples;
+      priv->gradient_data = samples;
+    }
+}
+
+static gboolean
+gimp_gradient_select_preview_expose (GtkWidget                *widget,
+                                     GdkEventExpose           *event,
+                                     GimpGradientSelectButton *button)
+{
+  GimpGradientSelectButtonPrivate *priv;
+  GtkAllocation                    allocation;
+  cairo_t                         *cr;
+  cairo_pattern_t                 *pattern;
+  cairo_surface_t                 *surface;
+  const gdouble                   *src;
+  guchar                          *dest;
+  gint                             width;
+  gint                             x;
+
+  priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button);
+
+  src = priv->gradient_data;
+  if (! src)
+    return FALSE;
+
+  gtk_widget_get_allocation (widget, &allocation);
+
+  cr = gdk_cairo_create (event->window);
+
+  gdk_cairo_region (cr, event->region);
+  cairo_clip (cr);
+
+  pattern = gimp_cairo_checkerboard_create (cr, GIMP_CHECK_SIZE_SM, NULL, NULL);
+  cairo_set_source (cr, pattern);
+  cairo_pattern_destroy (pattern);
+
+  cairo_paint (cr);
+
+  width = priv->n_samples / 4;
+
+  surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, 1);
+
+  for (x = 0, dest = cairo_image_surface_get_data (surface);
+       x < width;
+       x++, src += 4, dest += 4)
+    {
+      GimpRGB color;
+      guchar  r, g, b, a;
+
+      gimp_rgba_set (&color, src[0], src[1], src[2], src[3]);
+      gimp_rgba_get_uchar (&color, &r, &g, &b, &a);
+
+      GIMP_CAIRO_ARGB32_SET_PIXEL(dest, r, g, b, a);
+    }
+
+  cairo_surface_mark_dirty (surface);
+
+  pattern = cairo_pattern_create_for_surface (surface);
+  cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REFLECT);
+  cairo_surface_destroy (surface);
+
+  cairo_scale (cr, (gdouble) allocation.width / (gdouble) width, 1.0);
+
+  cairo_set_source (cr, pattern);
+  cairo_pattern_destroy (pattern);
+
+  cairo_paint (cr);
+
+  cairo_destroy (cr);
+
+  return FALSE;
+}
+
+static void
+gimp_gradient_select_drag_data_received (GimpGradientSelectButton *button,
+                                        GdkDragContext            *context,
+                                        gint                       x,
+                                        gint                       y,
+                                        GtkSelectionData          *selection,
+                                        guint                      info,
+                                        guint                      time)
+{
+  gint   length = gtk_selection_data_get_length (selection);
+  gchar *str;
+
+  if (gtk_selection_data_get_format (selection) != 8 || length < 1)
+    {
+      g_warning ("%s: received invalid gradient data", G_STRFUNC);
+      return;
+    }
+
+  str = g_strndup ((const gchar *) gtk_selection_data_get_data (selection),
+                   length);
+
+  if (g_utf8_validate (str, -1, NULL))
+    {
+      gint     pid;
+      gpointer unused;
+      gint     name_offset = 0;
+
+      if (sscanf (str, "%i:%p:%n", &pid, &unused, &name_offset) >= 2 &&
+          pid == gimp_getpid () && name_offset > 0)
+        {
+          gchar *name = str + name_offset;
+
+          gimp_gradient_select_button_set_gradient (button, name);
+        }
+    }
+
+  g_free (str);
+}
+
+static GtkWidget *
+gimp_gradient_select_button_create_inside (GimpGradientSelectButton *gradient_button)
+{
+  GtkWidget                       *button;
+  GimpGradientSelectButtonPrivate *priv;
+
+  priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (gradient_button);
+
+  gtk_widget_push_composite_child ();
+
+  button = gtk_button_new ();
+
+  priv->preview = gtk_drawing_area_new ();
+  gtk_widget_set_size_request (priv->preview, CELL_WIDTH, CELL_HEIGHT);
+  gtk_container_add (GTK_CONTAINER (button), priv->preview);
+
+  g_signal_connect (priv->preview, "size-allocate",
+                    G_CALLBACK (gimp_gradient_select_preview_size_allocate),
+                    gradient_button);
+
+  g_signal_connect (priv->preview, "expose-event",
+                    G_CALLBACK (gimp_gradient_select_preview_expose),
+                    gradient_button);
+
+  gtk_widget_show_all (button);
+
+  g_signal_connect_swapped (button, "clicked",
+                            G_CALLBACK (gimp_gradient_select_button_clicked),
+                            gradient_button);
+
+  gtk_drag_dest_set (GTK_WIDGET (button),
+                     GTK_DEST_DEFAULT_HIGHLIGHT |
+                     GTK_DEST_DEFAULT_MOTION |
+                     GTK_DEST_DEFAULT_DROP,
+                     &target, 1,
+                     GDK_ACTION_COPY);
+
+  g_signal_connect_swapped (button, "drag-data-received",
+                            G_CALLBACK (gimp_gradient_select_drag_data_received),
+                            gradient_button);
+
+  gtk_widget_pop_composite_child ();
+
+  return button;
+}