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gimp/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 = gtk_adjustment_new (0.0, 0.0, 255.0, 1.0, 16.0, 0.0);
box->low_spinbutton = gtk_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, box->low_adj);
/* high spinbutton */
box->high_adj = gtk_adjustment_new (255.0, 0.0, 255.0, 1.0, 16.0, 0.0);
box->high_spinbutton = gtk_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, 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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