Sylpheed

/*

 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client

 * Copyright (C) 2001-2004 Hiroyuki Yamamoto & The Sylpheed Claws Team

 *

 * 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 2 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, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 */

/* (alfons) - based on a contribution by Satoshi Nagayasu; revised for colorful 

 * menu and more Sylpheed integration. The idea to put the code in a separate

 * file is just that it make it easier to allow "user changeable" label colors.

 */

#include "defs.h"

#include <glib.h>

#include <gdk/gdkx.h>

#include <gtk/gtkwidget.h>

#include <gtk/gtkpixmap.h>

#include <gtk/gtkmenu.h>

#include <gtk/gtkcheckmenuitem.h>

#include <gtk/gtklabel.h>

#include <gtk/gtkmenuitem.h>

#include <gtk/gtkalignment.h>

#include <gtk/gtkhbox.h>

#include <gtk/gtkwindow.h>

#include <gtk/gtkdrawingarea.h>

#include "intl.h"

#include "colorlabel.h"

#include "gtkutils.h"

#include "utils.h"

static gchar *labels[] = {

        N_("Orange"),

        N_("Red") ,

        N_("Pink"),

        N_("Sky blue"),

        N_("Blue"),

        N_("Green"),

        N_("Brown")

};

typedef enum LabelColorChangeFlags_ {

        LCCF_COLOR = 1 << 0,

        LCCF_LABEL = 1 << 1,

        LCCF_ALL   = LCCF_COLOR | LCCF_LABEL

} LabelColorChangeFlags;

/* XXX: if you add colors, make sure you also check the procmsg.h.

 * color indices are stored as 3 bits; that explains the max. of 7 colors */

static struct 

{

        LabelColorChangeFlags        changed; 

        GdkColor                color;

        /* XXX: note that the label member is supposed to be dynamically 

         * allocated and fffreed */

        gchar                        *label;

        GtkWidget                *widget;

} label_colors[] = {

        { LCCF_ALL, { 0, 0xffff, (0x99 << 8), 0x0 },                NULL, NULL },

        { LCCF_ALL, { 0, 0xffff, 0, 0 },                        NULL, NULL },

        { LCCF_ALL, { 0, 0xffff, (0x66 << 8), 0xffff },                NULL, NULL },

        { LCCF_ALL, { 0, 0x0, (0xcc << 8), 0xffff },                NULL, NULL },

        { LCCF_ALL, { 0, 0x0, 0x0, 0xffff },                        NULL, NULL },

        { LCCF_ALL, { 0, 0x0, 0x99 << 8, 0x0 },                        NULL, NULL },

        { LCCF_ALL, { 0, 0x66 << 8, 0x33 << 8, 0x33 << 8 },        NULL, NULL }

};

#define LABEL_COLOR_WIDTH        28

#define LABEL_COLOR_HEIGHT        16

#define LABEL_COLORS_ELEMS (sizeof label_colors / sizeof label_colors[0])

#define G_RETURN_VAL_IF_INVALID_COLOR(color, val) \

        g_return_val_if_fail((color) >= 0 && (color) < LABEL_COLORS_ELEMS, (val))

static void colorlabel_recreate        (gint);

static void colorlabel_recreate_label  (gint);

gint colorlabel_get_color_count(void)

{

        return LABEL_COLORS_ELEMS;

}

GdkColor colorlabel_get_color(gint color_index)

{

        GdkColor invalid = { 0 };

        G_RETURN_VAL_IF_INVALID_COLOR(color_index, invalid);

        return label_colors[color_index].color;

}

gchar *colorlabel_get_color_text(gint color_index)

{

        G_RETURN_VAL_IF_INVALID_COLOR(color_index, NULL);

        colorlabel_recreate_label(color_index);

        return label_colors[color_index].label;

}

static gboolean colorlabel_drawing_area_expose_event_cb

        (GtkWidget *widget, GdkEventExpose *expose, gpointer data)

{

        GdkDrawable *drawable = widget->window;

        gulong c = (gulong) GPOINTER_TO_INT(data);

        GdkColor color;

        GdkGC *gc;

        color.red   = ((c >> 16UL) & 0xFFUL) << 8UL;

        color.green = ((c >>  8UL) & 0xFFUL) << 8UL;

        color.blue  = ((c)         & 0xFFUL) << 8UL;

        gdk_colormap_alloc_color(gtk_widget_get_colormap(widget), &color, FALSE, TRUE);

        gc = gdk_gc_new(drawable);

        gdk_gc_set_foreground(gc, &color);

        gdk_draw_rectangle(drawable, gc,

                           TRUE, 0, 0, widget->allocation.width - 1,

                           widget->allocation.height - 1);

        gdk_draw_rectangle(drawable, widget->style->black_gc,

                           FALSE, 0, 0, widget->allocation.width - 1,

                           widget->allocation.height - 1);

        gdk_gc_unref(gc);                           

        return FALSE;

}

static GtkWidget *colorlabel_create_color_widget(GdkColor color)

{

        GtkWidget *widget;

        widget = gtk_drawing_area_new();

        gtk_drawing_area_size(GTK_DRAWING_AREA(widget),

                              LABEL_COLOR_WIDTH - 2, LABEL_COLOR_HEIGHT - 4);

#define CL(x)                (((gulong) (x) >> (gulong) 8) & 0xFFUL)        

#define CR(r, g, b)        ((CL(r) << (gulong) 16) | \

                         (CL(g) << (gulong)  8) | \

                         (CL(b)))

        g_signal_connect(G_OBJECT(widget), "expose_event", 

                         G_CALLBACK(colorlabel_drawing_area_expose_event_cb),

                         GINT_TO_POINTER

                                ((gint)CR(color.red, color.green, color.blue)));

        return widget;

}

/* XXX: this function to check if menus with colors and labels should

 * be recreated */

gboolean colorlabel_changed(void)

{

        gint n;

        for (n = 0; n < LABEL_COLORS_ELEMS; n++) {

                if (label_colors[n].changed) 

                        return TRUE;

        }

        return FALSE;

}

/* XXX: colorlabel_recreate_XXX are there to make sure everything

 * is initialized ok, without having to call a global _xxx_init_

 * function */

static void colorlabel_recreate_color(gint color)

{

        GtkWidget *widget;

        if (!(label_colors[color].changed & LCCF_COLOR))

                return;

        widget = colorlabel_create_color_widget(label_colors[color].color);

        g_return_if_fail(widget);

        if (label_colors[color].widget) 

                gtk_widget_destroy(label_colors[color].widget);

        label_colors[color].widget = widget;                

        label_colors[color].changed &= ~LCCF_COLOR;

}

static void colorlabel_recreate_label(gint color)

{

        if (!label_colors[color].changed & LCCF_LABEL)

                return;

        if (label_colors[color].label == NULL) 

                label_colors[color].label = g_strdup(gettext(labels[color]));

        label_colors[color].changed &= ~LCCF_LABEL;

}

/* XXX: call this function everytime when you're doing important

 * stuff with the label_colors[] array */

static void colorlabel_recreate(gint color)

{

        colorlabel_recreate_label(color);

        colorlabel_recreate_color(color);

}

static void colorlabel_recreate_all(void)

{

        gint n;

        for ( n = 0; n < LABEL_COLORS_ELEMS; n++) 

                colorlabel_recreate(n);

}

/* colorlabel_create_check_color_menu_item() - creates a color

 * menu item with a check box */

GtkWidget *colorlabel_create_check_color_menu_item(gint color_index)

{

        GtkWidget *label; 

        GtkWidget *hbox; 

        GtkWidget *align; 

        GtkWidget *item;

        G_RETURN_VAL_IF_INVALID_COLOR(color_index, NULL);

        item = gtk_check_menu_item_new();

        colorlabel_recreate(color_index);

        /* XXX: gnome-core::panel::menu.c is a great example of

         * how to create pixmap menus */

        label = gtk_label_new(label_colors[color_index].label);

        gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.5);

        gtk_widget_show(label);

        hbox = gtk_hbox_new(FALSE, 0);

        gtk_widget_show(hbox);

        gtk_container_add(GTK_CONTAINER(item), hbox);

        align = gtk_alignment_new(0.5, 0.5, 0.0, 0.0);

        gtk_widget_show(align);

        gtk_container_set_border_width(GTK_CONTAINER(align), 1);

        gtk_container_add(GTK_CONTAINER(align), label_colors[color_index].widget);

        gtk_widget_show(label_colors[color_index].widget);

        gtk_widget_set_size_request

                (align, LABEL_COLOR_WIDTH, LABEL_COLOR_HEIGHT);

        gtk_box_pack_start(GTK_BOX(hbox), align, FALSE, FALSE, 0);

        gtk_box_pack_start(GTK_BOX(hbox), label, FALSE, FALSE, 4);

        return item;

}

/* colorlabel_create_color_menu() - creates a color menu without 

 * checkitems, probably for use in combo items */

GtkWidget *colorlabel_create_color_menu(void)

{

        GtkWidget *label; 

        GtkWidget *hbox; 

        GtkWidget *align; 

        GtkWidget *item;

        GtkWidget *menu;

        gint i;

        colorlabel_recreate_all();

        /* create the menu items. each item has its color code attached */

        menu = gtk_menu_new();

        g_object_set_data(G_OBJECT(menu), "label_color_menu", menu);

#if 0

        item = gtk_menu_item_new_with_label(_("None"));

        gtk_menu_shell_append(GTK_MENU_SHELL(menu), item);

        g_object_set_data(G_OBJECT(item), "color", GUINT_TO_POINTER(0));

        gtk_widget_show(item);

#endif

        /* and the color items */

        for (i = 0; i < LABEL_COLORS_ELEMS; i++) {

                GtkWidget *widget = colorlabel_create_color_widget(label_colors[i].color);

                item  = gtk_menu_item_new();

                g_object_set_data(G_OBJECT(item), "color",

                                  GUINT_TO_POINTER(i + 1));

                label = gtk_label_new(label_colors[i].label);

                gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.5);

                gtk_widget_show(label);

                hbox = gtk_hbox_new(FALSE, 0);

                gtk_widget_show(hbox);

                gtk_container_add(GTK_CONTAINER(item), hbox);

                align = gtk_alignment_new(0.5, 0.5, 0.0, 0.0);

                gtk_widget_show(align);

                gtk_container_set_border_width(GTK_CONTAINER(align), 1);

                gtk_container_add(GTK_CONTAINER(align), widget);

                gtk_widget_show(widget);

                gtk_widget_set_size_request

                        (align, LABEL_COLOR_WIDTH, LABEL_COLOR_HEIGHT);

                gtk_box_pack_start(GTK_BOX(hbox), align, FALSE, FALSE, 0);

                gtk_box_pack_start(GTK_BOX(hbox), label, FALSE, FALSE, 4);

                gtk_menu_shell_append(GTK_MENU_SHELL(menu), item);

                gtk_widget_show(item);

        }

        gtk_widget_show(menu);

        return menu;

}

guint colorlabel_get_color_menu_active_item(GtkWidget *menu)

{

        GtkWidget *menuitem;

        guint color;

        g_return_val_if_fail

                (g_object_get_data(G_OBJECT(menu), "label_color_menu"), 0);

        menuitem = gtk_menu_get_active(GTK_MENU(menu));

        color = GPOINTER_TO_UINT

                (g_object_get_data(G_OBJECT(menuitem), "color"));

        return color;

}