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gimp/libgimpwidgets/gimpcolorscales.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpcolorscales.c
* Copyright (C) 2002 Michael Natterer <mitch@gimp.org>
*
* based on color_notebook module
* Copyright (C) 1998 Austin Donnelly <austin@greenend.org.uk>
*
* 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
* <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "gimpwidgetstypes.h"
#include "gimpcolorscale.h"
#include "gimpcolorscales.h"
#include "gimpwidgets.h"
#include "libgimp/libgimp-intl.h"
/**
* SECTION: gimpcolorscales
* @title: GimpColorScales
* @short_description: A #GimpColorSelector implementation.
*
* The #GimpColorScales widget is an implementation of a
* #GimpColorSelector. It shows a group of #GimpColorScale widgets
* that allow to adjust the HSV and RGB color channels.
**/
#define GIMP_COLOR_SCALES_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_COLOR_SCALES, GimpColorScalesClass))
#define GIMP_IS_COLOR_SCALES_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_COLOR_SCALES))
#define GIMP_COLOR_SCALES_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_COLOR_SCALES, GimpColorScalesClass))
typedef struct _GimpColorScalesClass GimpColorScalesClass;
struct _GimpColorScales
{
GimpColorSelector parent_instance;
GtkWidget *toggles[7];
GtkWidget *sliders[7];
GtkObject *slider_data[7];
};
struct _GimpColorScalesClass
{
GimpColorSelectorClass parent_class;
};
static void gimp_color_scales_togg_sensitive (GimpColorSelector *selector,
gboolean sensitive);
static void gimp_color_scales_togg_visible (GimpColorSelector *selector,
gboolean visible);
static void gimp_color_scales_set_show_alpha (GimpColorSelector *selector,
gboolean show_alpha);
static void gimp_color_scales_set_color (GimpColorSelector *selector,
const GimpRGB *rgb,
const GimpHSV *hsv);
static void gimp_color_scales_set_channel (GimpColorSelector *selector,
GimpColorSelectorChannel channel);
static void gimp_color_scales_update_scales (GimpColorScales *scales,
gint skip);
static void gimp_color_scales_toggle_update (GtkWidget *widget,
GimpColorScales *scales);
static void gimp_color_scales_scale_update (GtkAdjustment *adjustment,
GimpColorScales *scales);
G_DEFINE_TYPE (GimpColorScales, gimp_color_scales, GIMP_TYPE_COLOR_SELECTOR)
#define parent_class gimp_color_scales_parent_class
static void
gimp_color_scales_class_init (GimpColorScalesClass *klass)
{
GimpColorSelectorClass *selector_class = GIMP_COLOR_SELECTOR_CLASS (klass);
selector_class->name = _("Scales");
selector_class->help_id = "gimp-colorselector-scales";
selector_class->stock_id = GIMP_STOCK_TOOL_OPTIONS;
selector_class->set_toggles_visible = gimp_color_scales_togg_visible;
selector_class->set_toggles_sensitive = gimp_color_scales_togg_sensitive;
selector_class->set_show_alpha = gimp_color_scales_set_show_alpha;
selector_class->set_color = gimp_color_scales_set_color;
selector_class->set_channel = gimp_color_scales_set_channel;
}
static void
gimp_color_scales_init (GimpColorScales *scales)
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (scales);
GtkWidget *table;
GEnumClass *enum_class;
GSList *group;
gint i;
static const gdouble slider_initial_vals[] =
{ 0, 0, 0, 0, 0, 0, 0 };
static const gdouble slider_max_vals[] =
{ 360, 100, 100, 255, 255, 255, 100 };
static const gdouble slider_incs[] =
{ 30, 10, 10, 16, 16, 16, 10 };
/* don't needs the toggles for our own operation */
selector->toggles_visible = FALSE;
table = gtk_table_new (7, 4, FALSE);
gtk_table_set_row_spacings (GTK_TABLE (table), 1);
gtk_table_set_row_spacing (GTK_TABLE (table), 2, 3); /* hsv <-> rgb */
gtk_table_set_row_spacing (GTK_TABLE (table), 5, 3); /* rgb <-> alpha */
gtk_table_set_col_spacings (GTK_TABLE (table), 2);
gtk_table_set_col_spacing (GTK_TABLE (table), 0, 0);
gtk_box_pack_start (GTK_BOX (scales), table, FALSE, FALSE, 0);
gtk_widget_show (table);
enum_class = g_type_class_ref (GIMP_TYPE_COLOR_SELECTOR_CHANNEL);
group = NULL;
for (i = GIMP_COLOR_SELECTOR_HUE; i <= GIMP_COLOR_SELECTOR_ALPHA; i++)
{
GimpEnumDesc *enum_desc;
enum_desc = gimp_enum_get_desc (enum_class, i);
if (i == GIMP_COLOR_SELECTOR_ALPHA)
{
scales->toggles[i] = NULL;
}
else
{
scales->toggles[i] = gtk_radio_button_new (group);
group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (scales->toggles[i]));
gtk_table_attach (GTK_TABLE (table), scales->toggles[i],
0, 1, i, i + 1,
GTK_SHRINK, GTK_EXPAND, 0, 0);
if (selector->toggles_visible)
gtk_widget_show (scales->toggles[i]);
gimp_help_set_help_data (scales->toggles[i],
gettext (enum_desc->value_help), NULL);
g_signal_connect (scales->toggles[i], "toggled",
G_CALLBACK (gimp_color_scales_toggle_update),
scales);
}
scales->slider_data[i] =
gimp_color_scale_entry_new (GTK_TABLE (table), 1, i,
gettext (enum_desc->value_desc),
-1, -1,
slider_initial_vals[i],
0.0, slider_max_vals[i],
1.0, slider_incs[i],
0,
gettext (enum_desc->value_help),
NULL);
scales->sliders[i] = GIMP_SCALE_ENTRY_SCALE (scales->slider_data[i]);
gimp_color_scale_set_channel (GIMP_COLOR_SCALE (scales->sliders[i]), i);
g_signal_connect (scales->slider_data[i], "value-changed",
G_CALLBACK (gimp_color_scales_scale_update),
scales);
}
g_type_class_unref (enum_class);
}
static void
gimp_color_scales_togg_sensitive (GimpColorSelector *selector,
gboolean sensitive)
{
GimpColorScales *scales = GIMP_COLOR_SCALES (selector);
gint i;
for (i = 0; i < 6; i++)
gtk_widget_set_sensitive (scales->toggles[i], sensitive);
}
static void
gimp_color_scales_togg_visible (GimpColorSelector *selector,
gboolean visible)
{
GimpColorScales *scales = GIMP_COLOR_SCALES (selector);
gint i;
for (i = 0; i < 6; i++)
gtk_widget_set_visible (scales->toggles[i], visible);
}
static void
gimp_color_scales_set_show_alpha (GimpColorSelector *selector,
gboolean show_alpha)
{
GimpColorScales *scales = GIMP_COLOR_SCALES (selector);
GtkWidget *label;
GtkWidget *scale;
GtkWidget *spin;
GtkWidget *table;
label = GIMP_SCALE_ENTRY_LABEL (scales->slider_data[6]);
scale = GIMP_SCALE_ENTRY_SCALE (scales->slider_data[6]);
spin = GIMP_SCALE_ENTRY_SPINBUTTON (scales->slider_data[6]);
table = gtk_widget_get_parent (scale);
if (GTK_IS_TABLE (table))
{
gtk_table_set_row_spacing (GTK_TABLE (table), 5, /* rgb <-> alpha */
show_alpha ? 3 : 0);
}
gtk_widget_set_visible (label, show_alpha);
gtk_widget_set_visible (scale, show_alpha);
gtk_widget_set_visible (spin, show_alpha);
}
static void
gimp_color_scales_set_color (GimpColorSelector *selector,
const GimpRGB *rgb,
const GimpHSV *hsv)
{
GimpColorScales *scales = GIMP_COLOR_SCALES (selector);
gimp_color_scales_update_scales (scales, -1);
}
static void
gimp_color_scales_set_channel (GimpColorSelector *selector,
GimpColorSelectorChannel channel)
{
GimpColorScales *scales = GIMP_COLOR_SCALES (selector);
if (channel < 7)
{
g_signal_handlers_block_by_func (scales->toggles[channel],
gimp_color_scales_toggle_update,
scales);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (scales->toggles[channel]),
TRUE);
g_signal_handlers_unblock_by_func (scales->toggles[channel],
gimp_color_scales_toggle_update,
scales);
}
}
static void
gimp_color_scales_update_scales (GimpColorScales *scales,
gint skip)
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (scales);
gint values[7];
gint i;
values[GIMP_COLOR_SELECTOR_HUE] = ROUND (selector->hsv.h * 360.0);
values[GIMP_COLOR_SELECTOR_SATURATION] = ROUND (selector->hsv.s * 100.0);
values[GIMP_COLOR_SELECTOR_VALUE] = ROUND (selector->hsv.v * 100.0);
values[GIMP_COLOR_SELECTOR_RED] = ROUND (selector->rgb.r * 255.0);
values[GIMP_COLOR_SELECTOR_GREEN] = ROUND (selector->rgb.g * 255.0);
values[GIMP_COLOR_SELECTOR_BLUE] = ROUND (selector->rgb.b * 255.0);
values[GIMP_COLOR_SELECTOR_ALPHA] = ROUND (selector->rgb.a * 100.0);
for (i = 0; i < 7; i++)
{
if (i != skip)
{
g_signal_handlers_block_by_func (scales->slider_data[i],
gimp_color_scales_scale_update,
scales);
gtk_adjustment_set_value (GTK_ADJUSTMENT (scales->slider_data[i]),
values[i]);
g_signal_handlers_unblock_by_func (scales->slider_data[i],
gimp_color_scales_scale_update,
scales);
}
gimp_color_scale_set_color (GIMP_COLOR_SCALE (scales->sliders[i]),
&selector->rgb, &selector->hsv);
}
}
static void
gimp_color_scales_toggle_update (GtkWidget *widget,
GimpColorScales *scales)
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (scales);
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
{
gint i;
for (i = 0; i < 6; i++)
if (widget == scales->toggles[i])
{
selector->channel = (GimpColorSelectorChannel) i;
break;
}
gimp_color_selector_channel_changed (selector);
}
}
static void
gimp_color_scales_scale_update (GtkAdjustment *adjustment,
GimpColorScales *scales)
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (scales);
gdouble value = gtk_adjustment_get_value (adjustment);
gint i;
for (i = 0; i < 7; i++)
if (scales->slider_data[i] == GTK_OBJECT (adjustment))
break;
switch (i)
{
case GIMP_COLOR_SELECTOR_HUE:
selector->hsv.h = value / 360.0;
break;
case GIMP_COLOR_SELECTOR_SATURATION:
selector->hsv.s = value / 100.0;
break;
case GIMP_COLOR_SELECTOR_VALUE:
selector->hsv.v = value / 100.0;
break;
case GIMP_COLOR_SELECTOR_RED:
selector->rgb.r = value / 255.0;
break;
case GIMP_COLOR_SELECTOR_GREEN:
selector->rgb.g = value / 255.0;
break;
case GIMP_COLOR_SELECTOR_BLUE:
selector->rgb.b = value / 255.0;
break;
case GIMP_COLOR_SELECTOR_ALPHA:
selector->hsv.a = selector->rgb.a = value / 100.0;
break;
}
if ((i >= GIMP_COLOR_SELECTOR_HUE) && (i <= GIMP_COLOR_SELECTOR_VALUE))
{
gimp_hsv_to_rgb (&selector->hsv, &selector->rgb);
}
else if ((i >= GIMP_COLOR_SELECTOR_RED) && (i <= GIMP_COLOR_SELECTOR_BLUE))
{
gimp_rgb_to_hsv (&selector->rgb, &selector->hsv);
}
gimp_color_scales_update_scales (scales, i);
gimp_color_selector_color_changed (selector);
}
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