PIKApp/app/widgets/pikacolorpanel.c

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2023-09-26 00:35:21 +02:00
/* 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 "libpikacolor/pikacolor.h"
#include "libpikawidgets/pikawidgets.h"
#include "widgets-types.h"
#include "config/pikacoreconfig.h"
#include "core/pika.h"
#include "core/pikacontext.h"
#include "pikaaction.h"
#include "pikaactiongroup.h"
#include "pikaactionimpl.h"
#include "pikacolordialog.h"
#include "pikacolorpanel.h"
#define RGBA_EPSILON 1e-6
enum
{
RESPONSE,
LAST_SIGNAL
};
/* local function prototypes */
static void pika_color_panel_dispose (GObject *object);
static gboolean pika_color_panel_button_press (GtkWidget *widget,
GdkEventButton *bevent);
static void pika_color_panel_clicked (GtkButton *button);
static void pika_color_panel_color_changed (PikaColorButton *button);
static GType pika_color_panel_get_action_type (PikaColorButton *button);
static void pika_color_panel_dialog_update (PikaColorDialog *dialog,
const PikaRGB *color,
PikaColorDialogState state,
PikaColorPanel *panel);
G_DEFINE_TYPE (PikaColorPanel, pika_color_panel, PIKA_TYPE_COLOR_BUTTON)
#define parent_class pika_color_panel_parent_class
static guint color_panel_signals[LAST_SIGNAL] = { 0, };
static void
pika_color_panel_class_init (PikaColorPanelClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GtkButtonClass *button_class = GTK_BUTTON_CLASS (klass);
PikaColorButtonClass *color_button_class = PIKA_COLOR_BUTTON_CLASS (klass);
object_class->dispose = pika_color_panel_dispose;
widget_class->button_press_event = pika_color_panel_button_press;
button_class->clicked = pika_color_panel_clicked;
color_button_class->color_changed = pika_color_panel_color_changed;
color_button_class->get_action_type = pika_color_panel_get_action_type;
color_panel_signals[RESPONSE] =
g_signal_new ("response",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (PikaColorPanelClass, response),
NULL, NULL, NULL,
G_TYPE_NONE, 1,
PIKA_TYPE_COLOR_DIALOG_STATE);
}
static void
pika_color_panel_init (PikaColorPanel *panel)
{
panel->context = NULL;
panel->color_dialog = NULL;
}
static void
pika_color_panel_dispose (GObject *object)
{
PikaColorPanel *panel = PIKA_COLOR_PANEL (object);
if (panel->color_dialog)
{
gtk_widget_destroy (panel->color_dialog);
panel->color_dialog = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static gboolean
pika_color_panel_button_press (GtkWidget *widget,
GdkEventButton *bevent)
{
if (gdk_event_triggers_context_menu ((GdkEvent *) bevent))
{
PikaColorButton *color_button;
PikaColorPanel *color_panel;
GSimpleActionGroup *group;
PikaAction *action;
PikaRGB color;
color_button = PIKA_COLOR_BUTTON (widget);
color_panel = PIKA_COLOR_PANEL (widget);
group = pika_color_button_get_action_group (color_button);
action = PIKA_ACTION (g_action_map_lookup_action (G_ACTION_MAP (group), "use-foreground"));
pika_action_set_visible (action, color_panel->context != NULL);
action = PIKA_ACTION (g_action_map_lookup_action (G_ACTION_MAP (group), "use-background"));
pika_action_set_visible (action, color_panel->context != NULL);
if (color_panel->context)
{
action = PIKA_ACTION (g_action_map_lookup_action (G_ACTION_MAP (group), "use-foreground"));
pika_context_get_foreground (color_panel->context, &color);
g_object_set (action, "color", &color, NULL);
action = PIKA_ACTION (g_action_map_lookup_action (G_ACTION_MAP (group), "use-background"));
pika_context_get_background (color_panel->context, &color);
g_object_set (action, "color", &color, NULL);
}
action = PIKA_ACTION (g_action_map_lookup_action (G_ACTION_MAP (group), "use-black"));
pika_rgba_set (&color, 0.0, 0.0, 0.0, PIKA_OPACITY_OPAQUE);
g_object_set (action, "color", &color, NULL);
action = PIKA_ACTION (g_action_map_lookup_action (G_ACTION_MAP (group), "use-white"));
pika_rgba_set (&color, 1.0, 1.0, 1.0, PIKA_OPACITY_OPAQUE);
g_object_set (action, "color", &color, NULL);
}
if (GTK_WIDGET_CLASS (parent_class)->button_press_event)
return GTK_WIDGET_CLASS (parent_class)->button_press_event (widget, bevent);
return FALSE;
}
static void
pika_color_panel_clicked (GtkButton *button)
{
PikaColorPanel *panel = PIKA_COLOR_PANEL (button);
PikaRGB color;
pika_color_button_get_color (PIKA_COLOR_BUTTON (button), &color);
if (! panel->color_dialog)
{
PikaColorButton *color_button = PIKA_COLOR_BUTTON (button);
panel->color_dialog =
pika_color_dialog_new (NULL, panel->context, TRUE,
pika_color_button_get_title (color_button),
NULL, NULL,
GTK_WIDGET (button),
NULL, NULL,
&color,
pika_color_button_get_update (color_button),
pika_color_button_has_alpha (color_button));
g_signal_connect (panel->color_dialog, "destroy",
G_CALLBACK (gtk_widget_destroyed),
&panel->color_dialog);
g_signal_connect (panel->color_dialog, "update",
G_CALLBACK (pika_color_panel_dialog_update),
panel);
}
else
{
pika_color_dialog_set_color (PIKA_COLOR_DIALOG (panel->color_dialog),
&color);
}
gtk_window_present (GTK_WINDOW (panel->color_dialog));
}
static GType
pika_color_panel_get_action_type (PikaColorButton *button)
{
return PIKA_TYPE_ACTION_IMPL;
}
/* public functions */
GtkWidget *
pika_color_panel_new (const gchar *title,
const PikaRGB *color,
PikaColorAreaType type,
gint width,
gint height)
{
g_return_val_if_fail (title != NULL, NULL);
g_return_val_if_fail (color != NULL, NULL);
g_return_val_if_fail (width > 0, NULL);
g_return_val_if_fail (height > 0, NULL);
return g_object_new (PIKA_TYPE_COLOR_PANEL,
"title", title,
"type", type,
"color", color,
"area-width", width,
"area-height", height,
NULL);
}
static void
pika_color_panel_color_changed (PikaColorButton *button)
{
PikaColorPanel *panel = PIKA_COLOR_PANEL (button);
PikaRGB color;
if (panel->color_dialog)
{
PikaRGB dialog_color;
pika_color_button_get_color (PIKA_COLOR_BUTTON (button), &color);
pika_color_dialog_get_color (PIKA_COLOR_DIALOG (panel->color_dialog),
&dialog_color);
if (pika_rgba_distance (&color, &dialog_color) > RGBA_EPSILON ||
color.a != dialog_color.a)
{
pika_color_dialog_set_color (PIKA_COLOR_DIALOG (panel->color_dialog),
&color);
}
}
}
void
pika_color_panel_set_context (PikaColorPanel *panel,
PikaContext *context)
{
g_return_if_fail (PIKA_IS_COLOR_PANEL (panel));
g_return_if_fail (context == NULL || PIKA_IS_CONTEXT (context));
panel->context = context;
if (context)
pika_color_button_set_color_config (PIKA_COLOR_BUTTON (panel),
context->pika->config->color_management);
}
void
pika_color_panel_dialog_response (PikaColorPanel *panel,
PikaColorDialogState state)
{
g_return_if_fail (PIKA_IS_COLOR_PANEL (panel));
g_return_if_fail (state == PIKA_COLOR_DIALOG_OK ||
state == PIKA_COLOR_DIALOG_CANCEL);
if (panel->color_dialog && gtk_widget_get_visible (panel->color_dialog))
pika_color_panel_dialog_update (NULL, NULL, state, panel);
}
/* private functions */
static void
pika_color_panel_dialog_update (PikaColorDialog *dialog,
const PikaRGB *color,
PikaColorDialogState state,
PikaColorPanel *panel)
{
switch (state)
{
case PIKA_COLOR_DIALOG_UPDATE:
if (pika_color_button_get_update (PIKA_COLOR_BUTTON (panel)))
pika_color_button_set_color (PIKA_COLOR_BUTTON (panel), color);
break;
case PIKA_COLOR_DIALOG_OK:
case PIKA_COLOR_DIALOG_CANCEL:
/* PikaColorDialog returns the appropriate color (new one or
* original one if process cancelled.
*/
pika_color_button_set_color (PIKA_COLOR_BUTTON (panel), color);
gtk_widget_hide (panel->color_dialog);
g_signal_emit (panel, color_panel_signals[RESPONSE], 0,
state);
break;
}
}