summaryrefslogtreecommitdiffstats
path: root/app/widgets/gimphistogrameditor.c
diff options
context:
space:
mode:
Diffstat (limited to 'app/widgets/gimphistogrameditor.c')
-rw-r--r--app/widgets/gimphistogrameditor.c765
1 files changed, 765 insertions, 0 deletions
diff --git a/app/widgets/gimphistogrameditor.c b/app/widgets/gimphistogrameditor.c
new file mode 100644
index 0000000..319243c
--- /dev/null
+++ b/app/widgets/gimphistogrameditor.c
@@ -0,0 +1,765 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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 "libgimpwidgets/gimpwidgets.h"
+
+#include "widgets-types.h"
+
+#include "core/gimp.h"
+#include "core/gimpasync.h"
+#include "core/gimpdrawable.h"
+#include "core/gimpdrawable-histogram.h"
+#include "core/gimphistogram.h"
+#include "core/gimpimage.h"
+
+#include "gimpdocked.h"
+#include "gimphelp-ids.h"
+#include "gimphistogrambox.h"
+#include "gimphistogrameditor.h"
+#include "gimphistogramview.h"
+#include "gimppropwidgets.h"
+#include "gimpsessioninfo-aux.h"
+#include "gimpwidgets-utils.h"
+
+#include "gimp-intl.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_LINEAR
+};
+
+
+static void gimp_histogram_editor_docked_iface_init (GimpDockedInterface *iface);
+
+static void gimp_histogram_editor_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_histogram_editor_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+
+static void gimp_histogram_editor_set_aux_info (GimpDocked *docked,
+ GList *aux_info);
+static GList * gimp_histogram_editor_get_aux_info (GimpDocked *docked);
+
+static void gimp_histogram_editor_set_image (GimpImageEditor *editor,
+ GimpImage *image);
+static void gimp_histogram_editor_layer_changed (GimpImage *image,
+ GimpHistogramEditor *editor);
+static void gimp_histogram_editor_frozen_update (GimpHistogramEditor *editor,
+ const GParamSpec *pspec);
+static void gimp_histogram_editor_buffer_update (GimpHistogramEditor *editor,
+ const GParamSpec *pspec);
+static void gimp_histogram_editor_update (GimpHistogramEditor *editor);
+
+static gboolean gimp_histogram_editor_idle_update (GimpHistogramEditor *editor);
+static gboolean gimp_histogram_menu_sensitivity (gint value,
+ gpointer data);
+static void gimp_histogram_editor_menu_update (GimpHistogramEditor *editor);
+static void gimp_histogram_editor_name_update (GimpHistogramEditor *editor);
+static void gimp_histogram_editor_info_update (GimpHistogramEditor *editor);
+
+static gboolean gimp_histogram_editor_view_expose (GimpHistogramEditor *editor);
+
+
+G_DEFINE_TYPE_WITH_CODE (GimpHistogramEditor, gimp_histogram_editor,
+ GIMP_TYPE_IMAGE_EDITOR,
+ G_IMPLEMENT_INTERFACE (GIMP_TYPE_DOCKED,
+ gimp_histogram_editor_docked_iface_init))
+
+#define parent_class gimp_histogram_editor_parent_class
+
+static GimpDockedInterface *parent_docked_iface = NULL;
+
+
+static void
+gimp_histogram_editor_class_init (GimpHistogramEditorClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpImageEditorClass *image_editor_class = GIMP_IMAGE_EDITOR_CLASS (klass);
+
+ object_class->set_property = gimp_histogram_editor_set_property;
+ object_class->get_property = gimp_histogram_editor_get_property;
+
+ image_editor_class->set_image = gimp_histogram_editor_set_image;
+
+ g_object_class_install_property (object_class, PROP_LINEAR,
+ g_param_spec_boolean ("linear",
+ _("Linear"), NULL,
+ TRUE,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+}
+
+static void
+gimp_histogram_editor_init (GimpHistogramEditor *editor)
+{
+ GimpHistogramView *view;
+ GtkWidget *hbox;
+ GtkWidget *label;
+ GtkWidget *menu;
+ GtkWidget *table;
+ gint i;
+
+ const gchar *gimp_histogram_editor_labels[] =
+ {
+ N_("Mean:"),
+ N_("Std dev:"),
+ N_("Median:"),
+ N_("Pixels:"),
+ N_("Count:"),
+ N_("Percentile:")
+ };
+
+ editor->box = gimp_histogram_box_new ();
+
+ gimp_editor_set_show_name (GIMP_EDITOR (editor), TRUE);
+
+ view = GIMP_HISTOGRAM_BOX (editor->box)->view;
+
+ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
+ gtk_box_pack_start (GTK_BOX (editor), hbox, FALSE, FALSE, 0);
+ gtk_widget_show (hbox);
+
+ editor->menu = menu = gimp_prop_enum_combo_box_new (G_OBJECT (view),
+ "histogram-channel",
+ 0, 0);
+ gimp_enum_combo_box_set_icon_prefix (GIMP_ENUM_COMBO_BOX (menu),
+ "gimp-channel");
+ gimp_int_combo_box_set_sensitivity (GIMP_INT_COMBO_BOX (editor->menu),
+ gimp_histogram_menu_sensitivity,
+ editor, NULL);
+ gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (editor->menu),
+ view->channel);
+ gtk_box_pack_start (GTK_BOX (hbox), menu, FALSE, FALSE, 0);
+ gtk_widget_show (menu);
+
+ gimp_help_set_help_data (editor->menu,
+ _("Histogram channel"), NULL);
+
+ menu = gimp_prop_enum_icon_box_new (G_OBJECT (view),
+ "histogram-scale", "gimp-histogram",
+ 0, 0);
+ gtk_box_pack_end (GTK_BOX (hbox), menu, FALSE, FALSE, 0);
+ gtk_widget_show (menu);
+
+ menu = gimp_prop_boolean_icon_box_new (G_OBJECT (editor), "linear",
+ GIMP_ICON_COLOR_SPACE_LINEAR,
+ GIMP_ICON_COLOR_SPACE_PERCEPTUAL,
+ _("Show values in linear space"),
+ _("Show values in perceptual space"));
+ gtk_box_pack_end (GTK_BOX (hbox), menu, FALSE, FALSE, 0);
+ gtk_widget_show (menu);
+
+ gtk_box_pack_start (GTK_BOX (editor), editor->box, TRUE, TRUE, 0);
+ gtk_widget_show (GTK_WIDGET (editor->box));
+
+ g_signal_connect_swapped (view, "range-changed",
+ G_CALLBACK (gimp_histogram_editor_info_update),
+ editor);
+ g_signal_connect_swapped (view, "notify::histogram-channel",
+ G_CALLBACK (gimp_histogram_editor_info_update),
+ editor);
+
+ g_signal_connect_swapped (view, "expose-event",
+ G_CALLBACK (gimp_histogram_editor_view_expose),
+ editor);
+
+ table = gtk_table_new (3, 4, FALSE);
+ gtk_table_set_col_spacings (GTK_TABLE (table), 2);
+ gtk_table_set_col_spacing (GTK_TABLE (table), 1, 6);
+ gtk_box_pack_start (GTK_BOX (editor), table, FALSE, FALSE, 0);
+ gtk_widget_show (table);
+
+ for (i = 0; i < 6; i++)
+ {
+ gint x = (i / 3) * 2;
+ gint y = (i % 3);
+
+ label = gtk_label_new (gettext (gimp_histogram_editor_labels[i]));
+ gimp_label_set_attributes (GTK_LABEL (label),
+ PANGO_ATTR_WEIGHT, PANGO_WEIGHT_BOLD,
+ PANGO_ATTR_SCALE, PANGO_SCALE_SMALL,
+ -1);
+ gtk_label_set_xalign (GTK_LABEL (label), 1.0);
+ gtk_table_attach (GTK_TABLE (table), label, x, x + 1, y, y + 1,
+ GTK_FILL | GTK_EXPAND, GTK_FILL, 2, 2);
+ gtk_widget_show (label);
+
+ editor->labels[i] =
+ label = g_object_new (GTK_TYPE_LABEL,
+ "xalign", 0.0,
+ "yalign", 0.5,
+ "width-chars", i > 2 ? 9 : 5,
+ NULL);
+ gimp_label_set_attributes (GTK_LABEL (editor->labels[i]),
+ PANGO_ATTR_SCALE, PANGO_SCALE_SMALL,
+ -1);
+ gtk_table_attach (GTK_TABLE (table), label, x + 1, x + 2, y, y + 1,
+ GTK_FILL, GTK_FILL, 2, 2);
+ gtk_widget_show (label);
+ }
+}
+
+static void
+gimp_histogram_editor_docked_iface_init (GimpDockedInterface *docked_iface)
+{
+ parent_docked_iface = g_type_interface_peek_parent (docked_iface);
+
+ if (! parent_docked_iface)
+ parent_docked_iface = g_type_default_interface_peek (GIMP_TYPE_DOCKED);
+
+ docked_iface->set_aux_info = gimp_histogram_editor_set_aux_info;
+ docked_iface->get_aux_info = gimp_histogram_editor_get_aux_info;
+}
+
+static void
+gimp_histogram_editor_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpHistogramEditor *editor = GIMP_HISTOGRAM_EDITOR (object);
+ GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
+
+ switch (property_id)
+ {
+ case PROP_LINEAR:
+ editor->linear = g_value_get_boolean (value);
+
+ if (editor->histogram)
+ {
+ g_clear_object (&editor->histogram);
+ gimp_histogram_view_set_histogram (view, NULL);
+ }
+
+ if (editor->bg_histogram)
+ {
+ g_clear_object (&editor->bg_histogram);
+ gimp_histogram_view_set_background (view, NULL);
+ }
+
+ gimp_histogram_editor_update (editor);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_histogram_editor_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpHistogramEditor *editor = GIMP_HISTOGRAM_EDITOR (object);
+
+ switch (property_id)
+ {
+ case PROP_LINEAR:
+ g_value_set_boolean (value, editor->linear);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_histogram_editor_set_aux_info (GimpDocked *docked,
+ GList *aux_info)
+{
+ GimpHistogramEditor *editor = GIMP_HISTOGRAM_EDITOR (docked);
+ GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
+
+ parent_docked_iface->set_aux_info (docked, aux_info);
+
+ gimp_session_info_aux_set_props (G_OBJECT (view), aux_info,
+ "histogram-channel",
+ "histogram-scale",
+ NULL);
+}
+
+static GList *
+gimp_histogram_editor_get_aux_info (GimpDocked *docked)
+{
+ GimpHistogramEditor *editor = GIMP_HISTOGRAM_EDITOR (docked);
+ GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
+ GList *aux_info;
+
+ aux_info = parent_docked_iface->get_aux_info (docked);
+
+ return g_list_concat (aux_info,
+ gimp_session_info_aux_new_from_props (G_OBJECT (view),
+ "histogram-channel",
+ "histogram-scale",
+ NULL));
+}
+
+static void
+gimp_histogram_editor_set_image (GimpImageEditor *image_editor,
+ GimpImage *image)
+{
+ GimpHistogramEditor *editor = GIMP_HISTOGRAM_EDITOR (image_editor);
+ GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
+
+ if (image_editor->image)
+ {
+ if (editor->idle_id)
+ {
+ g_source_remove (editor->idle_id);
+ editor->idle_id = 0;
+ }
+
+ editor->update_pending = FALSE;
+
+ g_signal_handlers_disconnect_by_func (image_editor->image,
+ gimp_histogram_editor_update,
+ editor);
+ g_signal_handlers_disconnect_by_func (image_editor->image,
+ gimp_histogram_editor_layer_changed,
+ editor);
+ g_signal_handlers_disconnect_by_func (image_editor->image,
+ gimp_histogram_editor_menu_update,
+ editor);
+
+ if (editor->histogram)
+ {
+ g_clear_object (&editor->histogram);
+ gimp_histogram_view_set_histogram (view, NULL);
+ }
+
+ if (editor->bg_histogram)
+ {
+ g_clear_object (&editor->bg_histogram);
+ gimp_histogram_view_set_background (view, NULL);
+ }
+ }
+
+ GIMP_IMAGE_EDITOR_CLASS (parent_class)->set_image (image_editor, image);
+
+ if (image)
+ {
+ g_signal_connect_object (image, "mode-changed",
+ G_CALLBACK (gimp_histogram_editor_menu_update),
+ editor, G_CONNECT_SWAPPED);
+ g_signal_connect_object (image, "active-layer-changed",
+ G_CALLBACK (gimp_histogram_editor_layer_changed),
+ editor, 0);
+ g_signal_connect_object (image, "mask-changed",
+ G_CALLBACK (gimp_histogram_editor_update),
+ editor, G_CONNECT_SWAPPED);
+ }
+
+ gimp_histogram_editor_layer_changed (image, editor);
+}
+
+GtkWidget *
+gimp_histogram_editor_new (void)
+{
+ return g_object_new (GIMP_TYPE_HISTOGRAM_EDITOR, NULL);
+}
+
+static void
+gimp_histogram_editor_layer_changed (GimpImage *image,
+ GimpHistogramEditor *editor)
+{
+ if (editor->drawable)
+ {
+ GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
+
+ if (editor->histogram)
+ {
+ g_clear_object (&editor->histogram);
+ gimp_histogram_view_set_histogram (view, NULL);
+ }
+
+ if (editor->bg_histogram)
+ {
+ g_clear_object (&editor->bg_histogram);
+ gimp_histogram_view_set_background (view, NULL);
+ }
+
+ g_signal_handlers_disconnect_by_func (editor->drawable,
+ gimp_histogram_editor_name_update,
+ editor);
+ g_signal_handlers_disconnect_by_func (editor->drawable,
+ gimp_histogram_editor_menu_update,
+ editor);
+ g_signal_handlers_disconnect_by_func (editor->drawable,
+ gimp_histogram_editor_update,
+ editor);
+ g_signal_handlers_disconnect_by_func (editor->drawable,
+ gimp_histogram_editor_buffer_update,
+ editor);
+ g_signal_handlers_disconnect_by_func (editor->drawable,
+ gimp_histogram_editor_frozen_update,
+ editor);
+ editor->drawable = NULL;
+ }
+
+ if (image)
+ editor->drawable = (GimpDrawable *) gimp_image_get_active_layer (image);
+
+ gimp_histogram_editor_menu_update (editor);
+
+ if (editor->drawable)
+ {
+ g_signal_connect_object (editor->drawable, "notify::frozen",
+ G_CALLBACK (gimp_histogram_editor_frozen_update),
+ editor, G_CONNECT_SWAPPED);
+ g_signal_connect_object (editor->drawable, "notify::buffer",
+ G_CALLBACK (gimp_histogram_editor_buffer_update),
+ editor, G_CONNECT_SWAPPED);
+ g_signal_connect_object (editor->drawable, "update",
+ G_CALLBACK (gimp_histogram_editor_update),
+ editor, G_CONNECT_SWAPPED);
+ g_signal_connect_object (editor->drawable, "alpha-changed",
+ G_CALLBACK (gimp_histogram_editor_menu_update),
+ editor, G_CONNECT_SWAPPED);
+ g_signal_connect_object (editor->drawable, "name-changed",
+ G_CALLBACK (gimp_histogram_editor_name_update),
+ editor, G_CONNECT_SWAPPED);
+
+ gimp_histogram_editor_buffer_update (editor, NULL);
+ }
+ else if (editor->histogram)
+ {
+ editor->recompute = TRUE;
+ gtk_widget_queue_draw (GTK_WIDGET (editor->box));
+ }
+
+ gimp_histogram_editor_info_update (editor);
+ gimp_histogram_editor_name_update (editor);
+}
+
+static void
+gimp_histogram_editor_calculate_async_callback (GimpAsync *async,
+ GimpHistogramEditor *editor)
+{
+ editor->calculate_async = NULL;
+
+ if (gimp_async_is_finished (async) && editor->histogram)
+ {
+ if (editor->bg_pending)
+ {
+ GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
+
+ editor->bg_histogram = gimp_histogram_duplicate (editor->histogram);
+
+ gimp_histogram_view_set_background (view, editor->bg_histogram);
+ }
+
+ gimp_histogram_editor_info_update (editor);
+ }
+
+ editor->bg_pending = FALSE;
+
+ if (editor->update_pending)
+ gimp_histogram_editor_update (editor);
+}
+
+static gboolean
+gimp_histogram_editor_validate (GimpHistogramEditor *editor)
+{
+ if (editor->recompute || ! editor->histogram)
+ {
+ if (editor->drawable &&
+ /* avoid calculating the histogram of a detached layer. this can
+ * happen during gimp_image_remove_layer(), as a result of a pending
+ * "expose-event" signal (handled in
+ * gimp_histogram_editor_view_expose()) executed through
+ * gtk_tree_view_clamp_node_visible(), as a result of the
+ * GimpLayerTreeView in the Layers dialog receiving the image's
+ * "active-layer-changed" signal before us. See bug #795716,
+ * comment 6.
+ */
+ gimp_item_is_attached (GIMP_ITEM (editor->drawable)))
+ {
+ GimpAsync *async;
+
+ if (! editor->histogram)
+ {
+ GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
+
+ editor->histogram = gimp_histogram_new (editor->linear);
+
+ gimp_histogram_clear_values (
+ editor->histogram,
+ babl_format_get_n_components (
+ gimp_drawable_get_format (editor->drawable)));
+
+ gimp_histogram_view_set_histogram (view, editor->histogram);
+ }
+
+ async = gimp_drawable_calculate_histogram_async (editor->drawable,
+ editor->histogram,
+ TRUE);
+
+ editor->calculate_async = async;
+
+ gimp_async_add_callback (
+ async,
+ (GimpAsyncCallback) gimp_histogram_editor_calculate_async_callback,
+ editor);
+
+ g_object_unref (async);
+ }
+ else if (editor->histogram)
+ {
+ gimp_histogram_clear_values (editor->histogram, 0);
+
+ gimp_histogram_editor_info_update (editor);
+ }
+
+ editor->recompute = FALSE;
+
+ if (editor->idle_id)
+ {
+ g_source_remove (editor->idle_id);
+ editor->idle_id = 0;
+ }
+ }
+
+ return (editor->histogram != NULL);
+}
+
+static void
+gimp_histogram_editor_frozen_update (GimpHistogramEditor *editor,
+ const GParamSpec *pspec)
+{
+ GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
+
+ if (gimp_viewable_preview_is_frozen (GIMP_VIEWABLE (editor->drawable)))
+ {
+ /* Only do the background histogram if the histogram is visible.
+ * This is a workaround for the fact that recalculating the
+ * histogram is expensive and that it is only validated when it
+ * is shown. So don't slow down painting by doing something that
+ * is not even seen by the user.
+ */
+ if (! editor->bg_histogram &&
+ gtk_widget_is_drawable (GTK_WIDGET (editor)))
+ {
+ if (editor->idle_id)
+ {
+ g_source_remove (editor->idle_id);
+
+ gimp_histogram_editor_idle_update (editor);
+ }
+
+ if (gimp_histogram_editor_validate (editor))
+ {
+ if (editor->calculate_async)
+ {
+ editor->bg_pending = TRUE;
+ }
+ else
+ {
+ editor->bg_histogram = gimp_histogram_duplicate (
+ editor->histogram);
+
+ gimp_histogram_view_set_background (view,
+ editor->bg_histogram);
+ }
+ }
+ }
+ }
+ else
+ {
+ if (editor->bg_histogram)
+ {
+ g_clear_object (&editor->bg_histogram);
+ gimp_histogram_view_set_background (view, NULL);
+ }
+
+ editor->bg_pending = FALSE;
+
+ if (editor->update_pending)
+ gimp_async_cancel_and_wait (editor->calculate_async);
+ }
+}
+
+static void
+gimp_histogram_editor_buffer_update (GimpHistogramEditor *editor,
+ const GParamSpec *pspec)
+{
+ g_object_set (editor,
+ "linear", gimp_drawable_get_linear (editor->drawable),
+ NULL);
+}
+
+static void
+gimp_histogram_editor_update (GimpHistogramEditor *editor)
+{
+ if (editor->bg_pending)
+ {
+ editor->update_pending = TRUE;
+
+ return;
+ }
+
+ editor->update_pending = FALSE;
+
+ if (editor->calculate_async)
+ gimp_async_cancel_and_wait (editor->calculate_async);
+
+ if (editor->idle_id)
+ g_source_remove (editor->idle_id);
+
+ editor->idle_id =
+ g_timeout_add_full (G_PRIORITY_LOW,
+ 200,
+ (GSourceFunc) gimp_histogram_editor_idle_update,
+ editor,
+ NULL);
+}
+
+static gboolean
+gimp_histogram_editor_idle_update (GimpHistogramEditor *editor)
+{
+ editor->idle_id = 0;
+
+ /* Mark the histogram for recomputation and queue a redraw.
+ * We will then recalculate the histogram when the view is exposed.
+ */
+ editor->recompute = TRUE;
+ gtk_widget_queue_draw (GTK_WIDGET (editor->box));
+
+ return FALSE;
+}
+
+static gboolean
+gimp_histogram_menu_sensitivity (gint value,
+ gpointer data)
+{
+ GimpHistogramEditor *editor = GIMP_HISTOGRAM_EDITOR (data);
+ GimpHistogramChannel channel = value;
+
+ if (editor->histogram)
+ return gimp_histogram_has_channel (editor->histogram, channel);
+
+ return FALSE;
+}
+
+static void
+gimp_histogram_editor_menu_update (GimpHistogramEditor *editor)
+{
+ GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
+
+ gtk_widget_queue_draw (editor->menu);
+
+ if (editor->histogram &&
+ ! gimp_histogram_has_channel (editor->histogram, view->channel))
+ {
+ gimp_histogram_view_set_channel (view, GIMP_HISTOGRAM_VALUE);
+ }
+}
+
+static void
+gimp_histogram_editor_name_update (GimpHistogramEditor *editor)
+{
+ const gchar *name = NULL;
+
+ if (editor->drawable)
+ name = gimp_object_get_name (editor->drawable);
+
+ gimp_editor_set_name (GIMP_EDITOR (editor), name);
+}
+
+static void
+gimp_histogram_editor_info_update (GimpHistogramEditor *editor)
+{
+ GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
+ GimpHistogram *hist = editor->histogram;
+
+ if (hist)
+ {
+ gint n_bins;
+ gdouble pixels;
+ gdouble count;
+ gchar text[12];
+
+ n_bins = gimp_histogram_n_bins (hist);
+
+ pixels = gimp_histogram_get_count (hist, view->channel, 0, n_bins - 1);
+ count = gimp_histogram_get_count (hist, view->channel,
+ view->start, view->end);
+
+ /* For the RGB histogram, we need to divide by three
+ * since it combines three histograms in one */
+ if (view->channel == GIMP_HISTOGRAM_RGB)
+ {
+ pixels /= 3;
+ count /= 3;
+ }
+
+ g_snprintf (text, sizeof (text), "%.3f",
+ gimp_histogram_get_mean (hist, view->channel,
+ view->start, view->end));
+ gtk_label_set_text (GTK_LABEL (editor->labels[0]), text);
+
+ g_snprintf (text, sizeof (text), "%.3f",
+ gimp_histogram_get_std_dev (hist, view->channel,
+ view->start, view->end));
+ gtk_label_set_text (GTK_LABEL (editor->labels[1]), text);
+
+ g_snprintf (text, sizeof (text), "%.3f",
+ gimp_histogram_get_median (hist, view->channel,
+ view->start,
+ view->end));
+ gtk_label_set_text (GTK_LABEL (editor->labels[2]), text);
+
+ g_snprintf (text, sizeof (text), "%d", (gint) pixels);
+ gtk_label_set_text (GTK_LABEL (editor->labels[3]), text);
+
+ g_snprintf (text, sizeof (text), "%d", (gint) count);
+ gtk_label_set_text (GTK_LABEL (editor->labels[4]), text);
+
+ g_snprintf (text, sizeof (text), "%.1f", (pixels > 0 ?
+ (100.0 * count / pixels) :
+ 0.0));
+ gtk_label_set_text (GTK_LABEL (editor->labels[5]), text);
+ }
+ else
+ {
+ gint i;
+
+ for (i = 0; i < 6; i++)
+ gtk_label_set_text (GTK_LABEL (editor->labels[i]), NULL);
+ }
+}
+
+static gboolean
+gimp_histogram_editor_view_expose (GimpHistogramEditor *editor)
+{
+ gimp_histogram_editor_validate (editor);
+
+ return FALSE;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 12:13:51 +0000