mirror of https://github.com/GNOME/gimp.git
450 lines
10 KiB
C
450 lines
10 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* color_notebook module (C) 1998 Austin Donnelly <austin@greenend.org.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#define __COLOR_NOTEBOOK_C__ 1
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#include "config.h"
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#include <gmodule.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "appenv.h"
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#include "color_notebook.h"
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#include "gimpui.h"
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#include "libgimp/color_selector.h"
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#include "libgimp/gimpintl.h"
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static void color_notebook_ok_callback (GtkWidget *, gpointer);
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static void color_notebook_cancel_callback (GtkWidget *, gpointer);
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static void color_notebook_update_callback (void *, int, int, int);
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static void color_notebook_page_switch (GtkWidget *, GtkNotebookPage *,
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guint);
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static void color_notebook_help_func (gpointer data);
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/* information we keep on each registered colour selector */
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typedef struct _ColorSelectorInfo {
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char *name; /* label used in notebook tab */
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char *help_page;
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GimpColorSelectorMethods m;
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int refs; /* number of instances around */
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gboolean active;
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void (*death_callback) (void *data);
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void *death_data;
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struct _ColorSelectorInfo *next;
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} ColorSelectorInfo;
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typedef struct _ColorSelectorInstance {
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_ColorNotebook *color_notebook;
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ColorSelectorInfo *info;
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GtkWidget *frame; /* main widget */
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gpointer selector_data;
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struct _ColorSelectorInstance *next;
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} ColorSelectorInstance;
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static void selector_death (ColorSelectorInfo *info);
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/* master list of all registered colour selectors */
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static ColorSelectorInfo *selector_info = NULL;
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#define RED 0
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#define GREEN 1
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#define BLUE 2
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#define NUM_COLORS 3
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ColorNotebookP
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color_notebook_new (int r,
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int g,
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int b,
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ColorNotebookCallback callback,
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void *client_data,
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int wants_updates)
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{
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ColorNotebookP cnp;
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GtkWidget *label;
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ColorSelectorInfo *info;
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ColorSelectorInstance *csel;
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g_return_val_if_fail (selector_info != NULL, NULL);
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cnp = g_new (_ColorNotebook, 1);
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cnp->callback = callback;
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cnp->client_data = client_data;
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cnp->wants_updates = wants_updates;
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cnp->selectors = NULL;
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cnp->cur_page = NULL;
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cnp->values[RED] = cnp->orig_values[RED] = r & 0xff;
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cnp->values[GREEN] = cnp->orig_values[GREEN] = g & 0xff;
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cnp->values[BLUE] = cnp->orig_values[BLUE] = b & 0xff;
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cnp->shell =
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gimp_dialog_new (_("Color Selection"), "color_selection",
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color_notebook_help_func, cnp,
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GTK_WIN_POS_NONE,
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FALSE, FALSE, FALSE,
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wants_updates ? _("Close") : _("OK"),
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color_notebook_ok_callback,
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cnp, NULL, TRUE, FALSE,
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wants_updates ? _("Revert to Old Color") : _("Cancel"),
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color_notebook_cancel_callback,
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cnp, NULL, FALSE, TRUE,
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NULL);
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/* do we actually need a notebook? */
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if (selector_info->next)
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{
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cnp->notebook = gtk_notebook_new ();
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gtk_box_pack_start (GTK_BOX (GTK_DIALOG (cnp->shell)->vbox),
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cnp->notebook, TRUE, TRUE, 1);
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gtk_widget_show (cnp->notebook);
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}
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else /* only one selector */
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{
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cnp->notebook = NULL;
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}
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/* create each registered colour selector */
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info = selector_info;
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while (info)
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{
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if (info->active)
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{
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csel = g_new (ColorSelectorInstance, 1);
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csel->color_notebook = cnp;
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csel->info = info;
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info->refs++;
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csel->frame = info->m.new (r, g, b,
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color_notebook_update_callback, csel,
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&csel->selector_data);
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gtk_object_set_data (GTK_OBJECT (csel->frame), "gimp_color_notebook",
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csel);
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if (cnp->notebook)
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{
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label = gtk_label_new (info->name);
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gtk_widget_show (label);
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/* hide the frame, so it doesn't get selected by mistake */
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gtk_widget_hide (csel->frame);
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gtk_notebook_append_page (GTK_NOTEBOOK (cnp->notebook),
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csel->frame, label);
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}
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else
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{
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gtk_box_pack_start (GTK_BOX (GTK_DIALOG (cnp->shell)->vbox),
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csel->frame, TRUE, TRUE, 1);
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}
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gtk_widget_show (csel->frame);
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if (!cnp->cur_page)
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cnp->cur_page = csel;
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/* link into list of all selectors hanging off the new notebook */
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csel->next = cnp->selectors;
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cnp->selectors = csel;
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}
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info = info->next;
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}
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gtk_widget_show (cnp->shell);
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/* this must come after showing the widget, otherwise we get a
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* switch_page signal for a non-visible color selector, which is bad
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* news. */
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if (cnp->notebook)
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{
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gtk_object_set_user_data (GTK_OBJECT (cnp->notebook), cnp);
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gtk_signal_connect (GTK_OBJECT (cnp->notebook), "switch_page",
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(GtkSignalFunc)color_notebook_page_switch, NULL);
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}
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return cnp;
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}
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void
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color_notebook_show (ColorNotebookP cnp)
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{
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g_return_if_fail (cnp != NULL);
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gtk_widget_show (cnp->shell);
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}
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void
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color_notebook_hide (ColorNotebookP cnp)
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{
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g_return_if_fail (cnp != NULL);
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gtk_widget_hide (cnp->shell);
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}
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void
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color_notebook_free (ColorNotebookP cnp)
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{
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ColorSelectorInstance *csel, *next;
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g_return_if_fail (cnp != NULL);
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gtk_widget_destroy (cnp->shell);
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/* call the free functions for all the colour selectors */
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csel = cnp->selectors;
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while (csel)
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{
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next = csel->next;
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csel->info->m.free (csel->selector_data);
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csel->info->refs--;
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if (csel->info->refs == 0 && !csel->info->active)
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selector_death (csel->info);
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g_free (csel);
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csel = next;
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}
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g_free (cnp);
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}
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void
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color_notebook_set_color (ColorNotebookP cnp,
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int r,
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int g,
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int b,
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int set_current)
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{
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ColorSelectorInstance *csel;
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g_return_if_fail (cnp != NULL);
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cnp->orig_values[RED] = r;
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cnp->orig_values[GREEN] = g;
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cnp->orig_values[BLUE] = b;
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if (set_current)
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{
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cnp->values[RED] = r;
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cnp->values[GREEN] = g;
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cnp->values[BLUE] = b;
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}
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csel = cnp->cur_page;
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csel->info->m.setcolor (csel->selector_data, r, g, b, set_current);
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}
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/* Called by a colour selector on user selection of a colour */
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static void
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color_notebook_update_callback (void *data,
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int r,
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int g,
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int b)
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{
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ColorSelectorInstance *csel;
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ColorNotebookP cnp;
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g_return_if_fail (data != NULL);
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csel = (ColorSelectorInstance *) data;
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cnp = csel->color_notebook;
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cnp->values[RED] = r;
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cnp->values[GREEN] = g;
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cnp->values[BLUE] = b;
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if (cnp->wants_updates && cnp->callback)
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{
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(* cnp->callback) (cnp->values[RED],
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cnp->values[GREEN],
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cnp->values[BLUE],
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COLOR_NOTEBOOK_UPDATE,
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cnp->client_data);
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}
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}
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static void
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color_notebook_ok_callback (GtkWidget *widget,
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gpointer data)
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{
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ColorNotebookP cnp;
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cnp = (ColorNotebookP) data;
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if (cnp->callback)
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(* cnp->callback) (cnp->values[RED],
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cnp->values[GREEN],
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cnp->values[BLUE],
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COLOR_NOTEBOOK_OK,
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cnp->client_data);
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}
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static void
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color_notebook_cancel_callback (GtkWidget *widget,
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gpointer data)
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{
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ColorNotebookP cnp;
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cnp = (ColorNotebookP) data;
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if (cnp->callback)
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(* cnp->callback) (cnp->orig_values[RED],
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cnp->orig_values[GREEN],
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cnp->orig_values[BLUE],
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COLOR_NOTEBOOK_CANCEL,
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cnp->client_data);
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}
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static void
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color_notebook_page_switch (GtkWidget *widget,
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GtkNotebookPage *page,
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guint page_num)
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{
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ColorNotebookP cnp;
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ColorSelectorInstance *csel;
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cnp = gtk_object_get_user_data (GTK_OBJECT (widget));
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csel = gtk_object_get_data (GTK_OBJECT(page->child), "gimp_color_notebook");
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g_return_if_fail (cnp != NULL && csel != NULL);
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cnp->cur_page = csel;
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csel->info->m.setcolor (csel->selector_data,
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cnp->values[RED],
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cnp->values[GREEN],
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cnp->values[BLUE],
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TRUE);
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}
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static void
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color_notebook_help_func (gpointer data)
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{
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ColorNotebookP cnp;
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gchar *help_path;
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cnp = (ColorNotebookP) data;
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help_path = g_strconcat ("dialogs/color_selectors/",
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cnp->cur_page->info->help_page,
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NULL);
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gimp_help (help_path);
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g_free (help_path);
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}
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/**************************************************************/
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/* Registration functions */
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G_MODULE_EXPORT
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GimpColorSelectorID
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gimp_color_selector_register (const char *name,
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const char *help_page,
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GimpColorSelectorMethods *methods)
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{
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ColorSelectorInfo *info;
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/* check the name is unique */
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info = selector_info;
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while (info)
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{
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if (!strcmp (info->name, name))
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return NULL;
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info = info->next;
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}
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info = g_new (ColorSelectorInfo, 1);
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info->name = g_strdup (name);
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info->help_page = g_strdup (help_page);
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info->m = *methods;
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info->refs = 0;
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info->active = TRUE;
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info->next = selector_info;
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selector_info = info;
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return info;
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}
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G_MODULE_EXPORT
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gboolean
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gimp_color_selector_unregister (GimpColorSelectorID id,
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void (*callback)(void *data),
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void *data)
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{
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ColorSelectorInfo *info;
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info = selector_info;
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while (info)
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{
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if (info == id)
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{
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info->active = FALSE;
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info->death_callback = callback;
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info->death_data = data;
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if (info->refs == 0)
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selector_death (info);
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return TRUE;
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}
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info = info->next;
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}
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g_warning ("unknown color selector id %p", id);
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return FALSE;
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}
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static void
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selector_death (ColorSelectorInfo *info)
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{
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ColorSelectorInfo *here, *prev;
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here = selector_info;
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prev = NULL;
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while (here)
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{
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if (here == info)
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{
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if (prev)
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prev->next = info->next;
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else
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selector_info = info->next;
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if (info->death_callback)
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(*info->death_callback) (info->death_data);
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g_free (info->name);
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g_free (info);
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return;
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}
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prev = here;
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here = here->next;
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}
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g_warning ("color selector %p not found, can't happen!", info);
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}
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/* End of color_notebook.c */
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