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-rw-r--r--app/widgets/gimphistogrambox.c317
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diff --git a/app/widgets/gimphistogrambox.c b/app/widgets/gimphistogrambox.c
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+/* 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 <string.h>
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpmath/gimpmath.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "widgets-types.h"
+
+#include "core/gimphistogram.h"
+
+#include "gimpcolorbar.h"
+#include "gimphandlebar.h"
+#include "gimphistogrambox.h"
+#include "gimphistogramview.h"
+
+#include "gimp-intl.h"
+
+
+/* #define DEBUG_VIEW */
+
+#define GRADIENT_HEIGHT 12
+#define CONTROL_HEIGHT 10
+
+
+/* local function prototypes */
+
+static void gimp_histogram_box_low_adj_update (GtkAdjustment *adj,
+ GimpHistogramBox *box);
+static void gimp_histogram_box_high_adj_update (GtkAdjustment *adj,
+ GimpHistogramBox *box);
+static void gimp_histogram_box_histogram_range (GimpHistogramView *view,
+ gint start,
+ gint end,
+ GimpHistogramBox *box);
+static void gimp_histogram_box_channel_notify (GimpHistogramView *view,
+ GParamSpec *pspec,
+ GimpHistogramBox *box);
+static void gimp_histogram_box_border_notify (GimpHistogramView *view,
+ GParamSpec *pspec,
+ GimpHistogramBox *box);
+
+
+G_DEFINE_TYPE (GimpHistogramBox, gimp_histogram_box, GTK_TYPE_BOX)
+
+
+static void
+gimp_histogram_box_class_init (GimpHistogramBoxClass *klass)
+{
+}
+
+static void
+gimp_histogram_box_init (GimpHistogramBox *box)
+{
+ GtkWidget *hbox;
+ GtkWidget *vbox;
+ GtkWidget *vbox2;
+ GtkWidget *frame;
+ GtkWidget *view;
+ GtkWidget *bar;
+
+ box->n_bins = 256;
+
+ gtk_orientable_set_orientation (GTK_ORIENTABLE (box),
+ GTK_ORIENTATION_VERTICAL);
+
+ gtk_box_set_spacing (GTK_BOX (box), 2);
+
+ frame = gtk_frame_new (NULL);
+ gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
+ gtk_box_pack_start (GTK_BOX (box), frame, TRUE, TRUE, 0);
+ gtk_widget_show (frame);
+
+ vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+ gtk_container_add (GTK_CONTAINER (frame), vbox);
+ gtk_widget_show (vbox);
+
+ /* The histogram */
+ view = gimp_histogram_view_new (TRUE);
+ gtk_box_pack_start (GTK_BOX (vbox), view, TRUE, TRUE, 0);
+ gtk_widget_show (view);
+
+ g_signal_connect (view, "range-changed",
+ G_CALLBACK (gimp_histogram_box_histogram_range),
+ box);
+
+ box->view = GIMP_HISTOGRAM_VIEW (view);
+
+ /* The gradient below the histogram */
+ vbox2 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+ gtk_container_set_border_width (GTK_CONTAINER (vbox2),
+ GIMP_HISTOGRAM_VIEW (view)->border_width);
+ gtk_box_pack_start (GTK_BOX (vbox), vbox2, FALSE, FALSE, 0);
+ gtk_widget_show (vbox2);
+
+ box->color_bar = bar = g_object_new (GIMP_TYPE_COLOR_BAR,
+ "histogram-channel", box->view->channel,
+ NULL);
+ gtk_widget_set_size_request (bar, -1, GRADIENT_HEIGHT);
+ gtk_box_pack_start (GTK_BOX (vbox2), bar, FALSE, FALSE, 0);
+ gtk_widget_show (bar);
+
+ g_signal_connect (view, "notify::histogram-channel",
+ G_CALLBACK (gimp_histogram_box_channel_notify),
+ box);
+ g_signal_connect (view, "notify::border-width",
+ G_CALLBACK (gimp_histogram_box_border_notify),
+ box);
+
+ box->slider_bar = bar = g_object_new (GIMP_TYPE_HANDLE_BAR, NULL);
+ gtk_widget_set_size_request (bar, -1, CONTROL_HEIGHT);
+ gtk_box_pack_start (GTK_BOX (vbox2), bar, FALSE, FALSE, 0);
+ gtk_widget_show (bar);
+
+ gimp_handle_bar_connect_events (GIMP_HANDLE_BAR (box->slider_bar),
+ box->color_bar);
+
+ /* The range selection */
+ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+ gtk_box_pack_start (GTK_BOX (box), hbox, FALSE, FALSE, 0);
+ gtk_widget_show (hbox);
+
+ /* low spinbutton */
+ box->low_adj = (GtkAdjustment *)
+ gtk_adjustment_new (0.0, 0.0, 255.0, 1.0, 16.0, 0.0);
+ box->low_spinbutton = gimp_spin_button_new (box->low_adj, 1.0, 0);
+ gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (box->low_spinbutton), TRUE);
+ gtk_box_pack_start (GTK_BOX (hbox), box->low_spinbutton, FALSE, FALSE, 0);
+ gtk_widget_show (box->low_spinbutton);
+
+ g_signal_connect (box->low_adj, "value-changed",
+ G_CALLBACK (gimp_histogram_box_low_adj_update),
+ box);
+
+ gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (bar), 0,
+ GTK_ADJUSTMENT (box->low_adj));
+
+ /* high spinbutton */
+ box->high_adj = (GtkAdjustment *)
+ gtk_adjustment_new (255.0, 0.0, 255.0, 1.0, 16.0, 0.0);
+ box->high_spinbutton = gimp_spin_button_new (box->high_adj, 1.0, 0);
+ gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (box->high_spinbutton), TRUE);
+ gtk_box_pack_end (GTK_BOX (hbox), box->high_spinbutton, FALSE, FALSE, 0);
+ gtk_widget_show (box->high_spinbutton);
+
+ g_signal_connect (box->high_adj, "value-changed",
+ G_CALLBACK (gimp_histogram_box_high_adj_update),
+ box);
+
+ gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (bar), 2,
+ GTK_ADJUSTMENT (box->high_adj));
+
+#ifdef DEBUG_VIEW
+ spinbutton = gimp_prop_spin_button_new (G_OBJECT (box->view), "border-width",
+ 1, 5, 0);
+ gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
+ gtk_widget_show (spinbutton);
+
+ spinbutton = gimp_prop_spin_button_new (G_OBJECT (box->view), "subdivisions",
+ 1, 5, 0);
+ gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
+ gtk_widget_show (spinbutton);
+#endif
+}
+
+static void
+gimp_histogram_box_low_adj_update (GtkAdjustment *adjustment,
+ GimpHistogramBox *box)
+{
+ gdouble value = gtk_adjustment_get_value (adjustment);
+
+ gtk_adjustment_set_lower (box->high_adj, value);
+
+ if (box->n_bins != 256)
+ value *= box->n_bins - 1;
+
+ value = ROUND (value);
+
+ if (box->view->start != value)
+ gimp_histogram_view_set_range (box->view, value, box->view->end);
+}
+
+static void
+gimp_histogram_box_high_adj_update (GtkAdjustment *adjustment,
+ GimpHistogramBox *box)
+{
+ gdouble value = gtk_adjustment_get_value (adjustment);
+
+ gtk_adjustment_set_upper (box->low_adj, value);
+
+ if (box->n_bins != 256)
+ value *= box->n_bins - 1;
+
+ value = ROUND (value);
+
+ if (box->view->end != value)
+ gimp_histogram_view_set_range (box->view, box->view->start, value);
+}
+
+static void
+gimp_histogram_box_histogram_range (GimpHistogramView *view,
+ gint start,
+ gint end,
+ GimpHistogramBox *box)
+{
+ gdouble s = start;
+ gdouble e = end;
+
+ if (box->n_bins != view->n_bins)
+ {
+ gdouble upper;
+ gdouble page_increment;
+ gdouble step_increment;
+ guint digits;
+
+ box->n_bins = view->n_bins;
+
+ if (box->n_bins == 256)
+ {
+ digits = 0;
+ upper = 255.0;
+ step_increment = 1.0;
+ page_increment = 16.0;
+ }
+ else
+ {
+ digits = 3;
+ upper = 1.0;
+ step_increment = 0.01;
+ page_increment = 0.1;
+ }
+
+ g_object_set (G_OBJECT (box->high_adj),
+ "upper", upper,
+ "step-increment", step_increment,
+ "page-increment", page_increment,
+ NULL);
+
+ gtk_spin_button_set_digits (GTK_SPIN_BUTTON (box->high_spinbutton), digits);
+
+ g_object_set (G_OBJECT (box->low_adj),
+ "step-increment", step_increment,
+ "page-increment", page_increment,
+ NULL);
+
+ gtk_spin_button_set_digits (GTK_SPIN_BUTTON (box->low_spinbutton), digits);
+ }
+
+ if (box->n_bins != 256)
+ {
+ s /= box->n_bins - 1;
+ e /= box->n_bins - 1;
+ }
+
+ gtk_adjustment_set_lower (box->high_adj, s);
+ gtk_adjustment_set_upper (box->low_adj, e);
+
+ gtk_adjustment_set_value (box->low_adj, s);
+ gtk_adjustment_set_value (box->high_adj, e);
+}
+
+static void
+gimp_histogram_box_channel_notify (GimpHistogramView *view,
+ GParamSpec *pspec,
+ GimpHistogramBox *box)
+{
+ gimp_color_bar_set_channel (GIMP_COLOR_BAR (box->color_bar), view->channel);
+}
+
+static void
+gimp_histogram_box_border_notify (GimpHistogramView *view,
+ GParamSpec *pspec,
+ GimpHistogramBox *box)
+{
+ GtkWidget *vbox = gtk_widget_get_parent (box->color_bar);
+
+ gtk_container_set_border_width (GTK_CONTAINER (vbox), view->border_width);
+}
+
+
+/* public functions */
+
+GtkWidget *
+gimp_histogram_box_new (void)
+{
+ return g_object_new (GIMP_TYPE_HISTOGRAM_BOX, NULL);
+}
+
+void
+gimp_histogram_box_set_channel (GimpHistogramBox *box,
+ GimpHistogramChannel channel)
+{
+ g_return_if_fail (GIMP_IS_HISTOGRAM_BOX (box));
+
+ if (box->view)
+ gimp_histogram_view_set_channel (box->view, channel);
+}
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