PIKApp/app/widgets/pikacolormapselection.c

824 lines
29 KiB
C

/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* 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 "libpikabase/pikabase.h"
#include "libpikacolor/pikacolor.h"
#include "libpikamath/pikamath.h"
#include "libpikawidgets/pikawidgets.h"
#include "widgets-types.h"
#include "core/pika.h"
#include "core/pikacontext.h"
#include "core/pikacontainer.h"
#include "core/pikaimage.h"
#include "core/pikaimage-colormap.h"
#include "core/pikamarshal.h"
#include "core/pikapalette.h"
#include "core/pikaprojection.h"
#include "pikacolordialog.h"
#include "pikacolormapselection.h"
#include "pikadialogfactory.h"
#include "pikadnd.h"
#include "pikadocked.h"
#include "pikamenufactory.h"
#include "pikapaletteview.h"
#include "pikauimanager.h"
#include "pikaviewrendererpalette.h"
#include "pikawidgets-utils.h"
#include "pika-intl.h"
enum
{
PROP_0,
PROP_CONTEXT,
PROP_INDEX
};
enum
{
COLOR_CLICKED,
COLOR_ACTIVATED,
LAST_SIGNAL
};
#define BORDER 6
#define RGB_EPSILON 1e-6
#define HAVE_COLORMAP(image) \
(image != NULL && \
pika_image_get_base_type (image) == PIKA_INDEXED && \
pika_image_get_colormap_palette (image) != NULL)
static void pika_colormap_selection_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void pika_colormap_selection_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void pika_colormap_selection_dispose (GObject *object);
static void pika_colormap_selection_finalize (GObject *object);
static void pika_colormap_selection_unmap (GtkWidget *widget);
static PangoLayout *
pika_colormap_selection_create_layout (GtkWidget *widget);
static void pika_colormap_selection_update_entries (PikaColormapSelection *selection);
static gboolean
pika_colormap_selection_preview_draw (GtkWidget *widget,
cairo_t *cr,
PikaColormapSelection *selection);
static void pika_colormap_selection_entry_clicked (PikaPaletteView *view,
PikaPaletteEntry *entry,
GdkModifierType state,
PikaColormapSelection *selection);
static void pika_colormap_selection_entry_selected (PikaPaletteView *view,
PikaPaletteEntry *entry,
PikaColormapSelection *selection);
static void pika_colormap_selection_entry_activated (PikaPaletteView *view,
PikaPaletteEntry *entry,
PikaColormapSelection *selection);
static void pika_colormap_selection_color_dropped (PikaPaletteView *view,
PikaPaletteEntry *entry,
const PikaRGB *color,
PikaColormapSelection *selection);
static void pika_colormap_adjustment_changed (GtkAdjustment *adjustment,
PikaColormapSelection *selection);
static void pika_colormap_hex_entry_changed (PikaColorHexEntry *entry,
PikaColormapSelection *selection);
static void pika_colormap_selection_set_context (PikaColormapSelection *selection,
PikaContext *context);
static void pika_colormap_selection_image_changed (PikaColormapSelection *selection,
PikaImage *image);
static void pika_colormap_selection_set_palette (PikaColormapSelection *selection);
G_DEFINE_TYPE (PikaColormapSelection, pika_colormap_selection, GTK_TYPE_BOX)
#define parent_class pika_colormap_selection_parent_class
static guint signals[LAST_SIGNAL] = { 0 };
static void
pika_colormap_selection_class_init (PikaColormapSelectionClass* klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
signals[COLOR_CLICKED] =
g_signal_new ("color-clicked",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaColormapSelectionClass, color_clicked),
NULL, NULL,
pika_marshal_VOID__POINTER_ENUM,
G_TYPE_NONE, 2,
G_TYPE_POINTER,
GDK_TYPE_MODIFIER_TYPE);
signals[COLOR_ACTIVATED] =
g_signal_new ("color-activated",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaColormapSelectionClass, color_activated),
NULL, NULL, NULL,
G_TYPE_NONE, 1,
G_TYPE_POINTER);
object_class->set_property = pika_colormap_selection_set_property;
object_class->get_property = pika_colormap_selection_get_property;
object_class->dispose = pika_colormap_selection_dispose;
object_class->finalize = pika_colormap_selection_finalize;
widget_class->unmap = pika_colormap_selection_unmap;
g_object_class_install_property (object_class, PROP_CONTEXT,
g_param_spec_object ("context",
NULL, NULL,
PIKA_TYPE_CONTEXT,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_INDEX,
g_param_spec_int ("index", NULL, NULL,
0, G_MAXINT, 0,
PIKA_PARAM_READABLE));
}
static void
pika_colormap_selection_init (PikaColormapSelection *selection)
{
GtkWidget *frame;
GtkWidget *grid;
gtk_box_set_homogeneous (GTK_BOX (selection), FALSE);
/* Main colormap frame. */
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (selection), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
selection->view = pika_view_new_full_by_types (NULL,
PIKA_TYPE_PALETTE_VIEW,
PIKA_TYPE_PALETTE,
1, 1, 0,
FALSE, TRUE, FALSE);
pika_view_set_expand (PIKA_VIEW (selection->view), TRUE);
gtk_container_add (GTK_CONTAINER (frame), selection->view);
gtk_widget_show (selection->view);
g_signal_connect (selection->view, "draw",
G_CALLBACK (pika_colormap_selection_preview_draw),
selection);
g_signal_connect (selection->view, "entry-clicked",
G_CALLBACK (pika_colormap_selection_entry_clicked),
selection);
g_signal_connect (selection->view, "entry-selected",
G_CALLBACK (pika_colormap_selection_entry_selected),
selection);
g_signal_connect (selection->view, "entry-activated",
G_CALLBACK (pika_colormap_selection_entry_activated),
selection);
g_signal_connect (selection->view, "color-dropped",
G_CALLBACK (pika_colormap_selection_color_dropped),
selection);
/* Bottom horizontal box for additional widgets. */
selection->right_vbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
gtk_box_set_homogeneous (GTK_BOX (selection->right_vbox), TRUE);
gtk_box_pack_end (GTK_BOX (selection), selection->right_vbox,
FALSE, FALSE, 0);
gtk_widget_show (selection->right_vbox);
/* Some helpful hints */
grid = gtk_grid_new ();
gtk_grid_set_column_spacing (GTK_GRID (grid), 4);
gtk_grid_set_row_spacing (GTK_GRID (grid), 2);
gtk_box_pack_end (GTK_BOX (selection), grid, FALSE, FALSE, 0);
gtk_widget_show (grid);
selection->index_adjustment = (GtkAdjustment *)
gtk_adjustment_new (0, 0, 0, 1, 10, 0);
selection->index_spinbutton = pika_spin_button_new (selection->index_adjustment,
1.0, 0);
gtk_widget_set_halign (selection->index_spinbutton, GTK_ALIGN_START);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (selection->index_spinbutton),
TRUE);
pika_grid_attach_aligned (GTK_GRID (grid), 0, 0,
_("Color index:"), 0.0, 0.5,
selection->index_spinbutton, 1);
g_signal_connect (selection->index_adjustment, "value-changed",
G_CALLBACK (pika_colormap_adjustment_changed),
selection);
selection->color_entry = pika_color_hex_entry_new ();
gtk_widget_set_halign (selection->color_entry, GTK_ALIGN_START);
pika_grid_attach_aligned (GTK_GRID (grid), 0, 1,
_("HTML notation:"), 0.0, 0.5,
selection->color_entry, 1);
g_signal_connect (selection->color_entry, "color-changed",
G_CALLBACK (pika_colormap_hex_entry_changed),
selection);
}
static void
pika_colormap_selection_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
PikaColormapSelection *selection = PIKA_COLORMAP_SELECTION (object);
switch (property_id)
{
case PROP_CONTEXT:
pika_colormap_selection_set_context (selection, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_colormap_selection_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
PikaColormapSelection *selection = PIKA_COLORMAP_SELECTION (object);
switch (property_id)
{
case PROP_CONTEXT:
g_value_set_object (value, selection->context);
break;
case PROP_INDEX:
g_value_set_int (value, selection->col_index);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_colormap_selection_dispose (GObject *object)
{
PikaColormapSelection *selection = PIKA_COLORMAP_SELECTION (object);
g_clear_pointer (&selection->color_dialog, gtk_widget_destroy);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
pika_colormap_selection_finalize (GObject *object)
{
PikaColormapSelection *selection = PIKA_COLORMAP_SELECTION (object);
if (selection->context)
{
g_signal_handlers_disconnect_by_func (selection->context,
gtk_widget_queue_draw,
selection);
g_signal_handlers_disconnect_by_func (selection->context,
G_CALLBACK (pika_colormap_selection_image_changed),
selection);
}
if (selection->active_image)
{
g_signal_handlers_disconnect_by_func (selection->active_image,
G_CALLBACK (gtk_widget_queue_draw),
selection);
g_signal_handlers_disconnect_by_func (selection->active_image,
G_CALLBACK (pika_colormap_selection_set_palette),
selection);
}
if (selection->active_palette)
{
g_signal_handlers_disconnect_by_func (selection->active_palette,
G_CALLBACK (gtk_widget_queue_draw),
selection);
}
g_clear_object (&selection->layout);
g_clear_object (&selection->context);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
pika_colormap_selection_unmap (GtkWidget *widget)
{
PikaColormapSelection *selection = PIKA_COLORMAP_SELECTION (widget);
if (selection->color_dialog)
gtk_widget_hide (selection->color_dialog);
GTK_WIDGET_CLASS (parent_class)->unmap (widget);
}
/* public functions */
GtkWidget *
pika_colormap_selection_new (PikaContext *context)
{
g_return_val_if_fail (PIKA_IS_CONTEXT (context), NULL);
return g_object_new (PIKA_TYPE_COLORMAP_SELECTION,
"context", context,
"orientation", GTK_ORIENTATION_VERTICAL,
NULL);
}
gint
pika_colormap_selection_get_index (PikaColormapSelection *selection,
const PikaRGB *search)
{
PikaImage *image;
gint index;
g_return_val_if_fail (PIKA_IS_COLORMAP_SELECTION (selection), 0);
image = pika_context_get_image (selection->context);
if (! HAVE_COLORMAP (image))
return -1;
index = selection->col_index;
if (search)
{
PikaRGB temp;
pika_image_get_colormap_entry (image, index, &temp);
if (pika_rgb_distance (&temp, search) > RGB_EPSILON)
{
gint n_colors = pika_image_get_colormap_size (image);
gint i;
for (i = 0; i < n_colors; i++)
{
pika_image_get_colormap_entry (image, i, &temp);
if (pika_rgb_distance (&temp, search) < RGB_EPSILON)
{
index = i;
break;
}
}
}
}
return index;
}
gboolean
pika_colormap_selection_set_index (PikaColormapSelection *selection,
gint index,
PikaRGB *color)
{
PikaImage *image;
gint size;
g_return_val_if_fail (PIKA_IS_COLORMAP_SELECTION (selection), FALSE);
image = pika_context_get_image (selection->context);
if (! HAVE_COLORMAP (image))
return FALSE;
size = pika_image_get_colormap_size (image);
if (size < 1)
return FALSE;
index = CLAMP (index, 0, size - 1);
if (index != selection->col_index)
{
PikaPalette *palette = pika_image_get_colormap_palette (image);
selection->col_index = index;
g_object_notify (G_OBJECT (selection), "index");
pika_palette_view_select_entry (PIKA_PALETTE_VIEW (selection->view),
pika_palette_get_entry (palette, index));
pika_colormap_selection_update_entries (selection);
}
if (color)
pika_image_get_colormap_entry (image, index, color);
return TRUE;
}
gint
pika_colormap_selection_max_index (PikaColormapSelection *selection)
{
PikaImage *image;
g_return_val_if_fail (PIKA_IS_COLORMAP_SELECTION (selection), -1);
image = pika_context_get_image (selection->context);
if (! HAVE_COLORMAP (image))
return -1;
return MAX (0, pika_image_get_colormap_size (image) - 1);
}
PikaPaletteEntry *
pika_colormap_selection_get_selected_entry (PikaColormapSelection *selection)
{
g_return_val_if_fail (PIKA_IS_COLORMAP_SELECTION (selection), NULL);
return pika_palette_view_get_selected_entry (PIKA_PALETTE_VIEW (selection->view));
}
void
pika_colormap_selection_get_entry_rect (PikaColormapSelection *selection,
PikaPaletteEntry *entry,
GdkRectangle *rect)
{
GtkAllocation allocation;
g_return_if_fail (PIKA_IS_COLORMAP_SELECTION (selection));
g_return_if_fail (entry);
g_return_if_fail (rect);
pika_palette_view_get_entry_rect (PIKA_PALETTE_VIEW (selection->view),
entry, rect);
gtk_widget_get_allocation (GTK_WIDGET (selection), &allocation);
/* rect->x += allocation.x; */
/* rect->y += allocation.y; */
}
/* private functions */
static PangoLayout *
pika_colormap_selection_create_layout (GtkWidget *widget)
{
PangoLayout *layout;
PangoAttrList *attrs;
PangoAttribute *attr;
layout = gtk_widget_create_pango_layout (widget,
_("Only indexed images have "
"a colormap."));
pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
attrs = pango_attr_list_new ();
attr = pango_attr_style_new (PANGO_STYLE_ITALIC);
attr->start_index = 0;
attr->end_index = -1;
pango_attr_list_insert (attrs, attr);
pango_layout_set_attributes (layout, attrs);
pango_attr_list_unref (attrs);
return layout;
}
static gboolean
pika_colormap_selection_preview_draw (GtkWidget *widget,
cairo_t *cr,
PikaColormapSelection *selection)
{
GtkStyleContext *style = gtk_widget_get_style_context (widget);
PikaImage *image;
GtkAllocation allocation;
GdkRGBA color;
gint width, height;
gint y;
image = pika_context_get_image (selection->context);
if (image == NULL || pika_image_get_base_type (image) == PIKA_INDEXED)
return FALSE;
gtk_style_context_get_color (style, gtk_widget_get_state_flags (widget),
&color);
gdk_cairo_set_source_rgba (cr, &color);
gtk_widget_get_allocation (widget, &allocation);
if (! selection->layout)
selection->layout = pika_colormap_selection_create_layout (selection->view);
pango_layout_set_width (selection->layout,
PANGO_SCALE * (allocation.width - 2 * BORDER));
pango_layout_get_pixel_size (selection->layout, &width, &height);
y = (allocation.height - height) / 2;
cairo_move_to (cr, BORDER, MAX (y, 0));
pango_cairo_show_layout (cr, selection->layout);
return TRUE;
}
static void
pika_colormap_selection_update_entries (PikaColormapSelection *selection)
{
PikaImage *image = pika_context_get_image (selection->context);
if (! HAVE_COLORMAP (image) ||
! pika_image_get_colormap_size (image))
{
gtk_widget_set_sensitive (selection->index_spinbutton, FALSE);
gtk_widget_set_sensitive (selection->color_entry, FALSE);
gtk_adjustment_set_value (selection->index_adjustment, 0);
gtk_entry_set_text (GTK_ENTRY (selection->color_entry), "");
}
else
{
PikaRGB color;
guchar r, g, b;
gchar *string;
gtk_adjustment_set_value (selection->index_adjustment,
selection->col_index);
pika_image_get_colormap_entry (image, selection->col_index, &color);
pika_rgb_get_uchar (&color, &r, &g, &b);
string = g_strdup_printf ("%02x%02x%02x", r, g, b);
gtk_entry_set_text (GTK_ENTRY (selection->color_entry), string);
g_free (string);
gtk_widget_set_sensitive (selection->index_spinbutton, TRUE);
gtk_widget_set_sensitive (selection->color_entry, TRUE);
}
}
static void
pika_colormap_selection_entry_clicked (PikaPaletteView *view,
PikaPaletteEntry *entry,
GdkModifierType state,
PikaColormapSelection *selection)
{
PikaPalette *palette;
gint index;
palette = pika_image_get_colormap_palette (selection->active_image);
index = pika_palette_get_entry_position (palette, entry);
pika_colormap_selection_set_index (selection, index, NULL);
g_signal_emit (selection, signals[COLOR_CLICKED], 0, entry, state);
}
static void
pika_colormap_selection_entry_selected (PikaPaletteView *view,
PikaPaletteEntry *entry,
PikaColormapSelection *selection)
{
PikaPalette *palette;
gint index = 0;
palette = pika_image_get_colormap_palette (selection->active_image);
if (entry)
index = pika_palette_get_entry_position (palette, entry);
pika_colormap_selection_set_index (selection, index, NULL);
}
static void
pika_colormap_selection_entry_activated (PikaPaletteView *view,
PikaPaletteEntry *entry,
PikaColormapSelection *selection)
{
PikaPalette *palette;
gint index;
palette = pika_image_get_colormap_palette (selection->active_image);
index = pika_palette_get_entry_position (palette, entry);
pika_colormap_selection_set_index (selection, index, NULL);
g_signal_emit (selection, signals[COLOR_ACTIVATED], 0, entry);
}
static void
pika_colormap_selection_color_dropped (PikaPaletteView *view,
PikaPaletteEntry *entry,
const PikaRGB *color,
PikaColormapSelection *selection)
{
}
static void
pika_colormap_adjustment_changed (GtkAdjustment *adjustment,
PikaColormapSelection *selection)
{
PikaImage *image = pika_context_get_image (selection->context);
if (HAVE_COLORMAP (image))
{
gint index = ROUND (gtk_adjustment_get_value (adjustment));
pika_colormap_selection_set_index (selection, index, NULL);
pika_colormap_selection_update_entries (selection);
}
}
static void
pika_colormap_hex_entry_changed (PikaColorHexEntry *entry,
PikaColormapSelection *selection)
{
PikaImage *image = pika_context_get_image (selection->context);
if (image)
{
PikaRGB color;
pika_color_hex_entry_get_color (entry, &color);
pika_image_set_colormap_entry (image, selection->col_index, &color, TRUE);
pika_image_flush (image);
}
}
static void
pika_colormap_selection_set_context (PikaColormapSelection *selection,
PikaContext *context)
{
g_return_if_fail (PIKA_IS_COLORMAP_SELECTION (selection));
g_return_if_fail (context == NULL || PIKA_IS_CONTEXT (context));
if (context != selection->context)
{
if (selection->context)
{
g_signal_handlers_disconnect_by_func (selection->context,
gtk_widget_queue_draw,
selection);
g_signal_handlers_disconnect_by_func (selection->context,
G_CALLBACK (pika_colormap_selection_image_changed),
selection);
g_object_unref (selection->context);
}
selection->context = context;
if (context)
{
g_object_ref (context);
g_signal_connect_swapped (context, "foreground-changed",
G_CALLBACK (gtk_widget_queue_draw),
selection);
g_signal_connect_swapped (context, "background-changed",
G_CALLBACK (gtk_widget_queue_draw),
selection);
g_signal_connect_swapped (context, "image-changed",
G_CALLBACK (pika_colormap_selection_image_changed),
selection);
pika_colormap_selection_image_changed (selection, pika_context_get_image (context));
}
pika_view_renderer_set_context (PIKA_VIEW (selection->view)->renderer,
context);
g_object_notify (G_OBJECT (selection), "context");
}
}
static void
pika_colormap_selection_image_changed (PikaColormapSelection *selection,
PikaImage *image)
{
if (selection->active_image)
{
g_signal_handlers_disconnect_by_func (selection->active_image,
G_CALLBACK (gtk_widget_queue_draw),
selection);
g_signal_handlers_disconnect_by_func (selection->active_image,
G_CALLBACK (pika_colormap_selection_set_palette),
selection);
if (pika_image_get_base_type (selection->active_image) == PIKA_INDEXED)
{
PikaPalette *palette;
palette = pika_image_get_colormap_palette (selection->active_image);
g_signal_handlers_disconnect_by_func (palette,
G_CALLBACK (gtk_widget_queue_draw),
selection);
}
if (selection->color_dialog)
gtk_widget_hide (selection->color_dialog);
if (! HAVE_COLORMAP (image))
{
gtk_adjustment_set_upper (selection->index_adjustment, 0);
if (gtk_widget_get_mapped (GTK_WIDGET (selection)))
{
if (selection->active_palette)
g_signal_handlers_disconnect_by_func (selection->active_palette,
G_CALLBACK (gtk_widget_queue_draw),
selection);
pika_view_set_viewable (PIKA_VIEW (selection->view), NULL);
gtk_adjustment_set_upper (selection->index_adjustment, 0);
selection->active_palette = NULL;
}
}
}
g_set_weak_pointer (&selection->active_image, image);
if (image)
{
g_signal_connect_swapped (image, "colormap-changed",
G_CALLBACK (gtk_widget_queue_draw),
selection);
g_signal_connect_swapped (image, "mode-changed",
G_CALLBACK (pika_colormap_selection_set_palette),
selection);
}
pika_colormap_selection_set_palette (selection);
gtk_widget_queue_draw (GTK_WIDGET (selection));
}
static void
pika_colormap_selection_set_palette (PikaColormapSelection *selection)
{
PikaPalette *palette = NULL;
if (selection->active_image)
palette = pika_image_get_colormap_palette (selection->active_image);
if (palette != selection->active_palette)
{
if (selection->active_palette)
{
pika_colormap_selection_set_index (selection, 0, NULL);
g_signal_handlers_disconnect_by_func (selection->active_palette,
G_CALLBACK (gtk_widget_queue_draw),
selection);
pika_view_set_viewable (PIKA_VIEW (selection->view), NULL);
gtk_adjustment_set_upper (selection->index_adjustment, 0);
}
g_set_weak_pointer (&selection->active_palette, palette);
if (palette)
{
g_signal_connect_swapped (palette, "dirty",
G_CALLBACK (gtk_widget_queue_draw),
selection);
pika_view_set_viewable (PIKA_VIEW (selection->view),
PIKA_VIEWABLE (palette));
gtk_adjustment_set_upper (selection->index_adjustment,
pika_image_get_colormap_size (selection->active_image) - 1);
}
}
}