src/widgets/sp-color-notebook.cpp

	sp-color-notebook.cpp revision 233a1f180a791dbec18c48af4d6586aef6eed085
/*
 * A notebook with RGB, CMYK, CMS, HSL, and Wheel pages
 *
 * Author:
 *   Lauris Kaplinski <lauris@kaplinski.com>
 *   bulia byak <buliabyak@users.sf.net>
 *
 * Copyright (C) 2001-2002 Lauris Kaplinski
 *
 * This code is in public domain
 */

#undef SPCS_PREVIEW
#define noDUMP_CHANGE_INFO

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <cstring>
#include <string>
#include <cstdlib>
#include <cstddef>
#include <gtk/gtk.h>
#include <glibmm/i18n.h>

#include "../dialogs/dialog-events.h"
#include "../preferences.h"
#include "sp-color-notebook.h"
#include "spw-utilities.h"
#include "sp-color-scales.h"
#include "sp-color-icc-selector.h"
#include "sp-color-wheel-selector.h"
#include "svg/svg-icc-color.h"
#include "../inkscape.h"
#include "../document.h"
#include "../profile-manager.h"
#include "color-profile.h"
#include "cms-system.h"

using Inkscape::CMSSystem;

struct SPColorNotebookTracker {
    const gchar* name;
    const gchar* className;
    GType type;
    guint submode;
    gboolean enabledFull;
    gboolean enabledBrief;
    SPColorNotebook *backPointer;
};

static void sp_color_notebook_class_init (SPColorNotebookClass *klass);
static void sp_color_notebook_init (SPColorNotebook *colorbook);
static void sp_color_notebook_destroy (GtkObject *object);

static void sp_color_notebook_show_all (GtkWidget *widget);
static void sp_color_notebook_hide_all (GtkWidget *widget);

static SPColorSelectorClass *parent_class;

#define XPAD 4
#define YPAD 1

GType sp_color_notebook_get_type(void)
{
    static GType type = 0;
    if (!type) {
        GTypeInfo info = {
            sizeof(SPColorNotebookClass),
            0, // base_init
            0, // base_finalize
            (GClassInitFunc)sp_color_notebook_class_init,
            0, // class_finalize
            0, // class_data
            sizeof(SPColorNotebook),
            0, // n_preallocs
            (GInstanceInitFunc)sp_color_notebook_init,
            0 // value_table
        };
        type = g_type_register_static(SP_TYPE_COLOR_SELECTOR, "SPColorNotebook", &info, static_cast<GTypeFlags>(0));
    }
    return type;
}

static void sp_color_notebook_class_init(SPColorNotebookClass *klass)
{
    GtkObjectClass *object_class = reinterpret_cast<GtkObjectClass *>(klass);
    GtkWidgetClass *widget_class = reinterpret_cast<GtkWidgetClass *>(klass);

    parent_class = SP_COLOR_SELECTOR_CLASS(g_type_class_peek_parent(klass));

    object_class->destroy = sp_color_notebook_destroy;

    widget_class->show_all = sp_color_notebook_show_all;
    widget_class->hide_all = sp_color_notebook_hide_all;
}

static void
sp_color_notebook_switch_page(GtkNotebook *notebook,
                              GtkWidget   *page,
                              guint page_num,
                              SPColorNotebook *colorbook)
{
    if ( colorbook )
    {
        ColorNotebook* nb = (ColorNotebook*)(SP_COLOR_SELECTOR(colorbook)->base);
        nb->switchPage( notebook, page, page_num );

        // remember the page we switched to
        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
        prefs->setInt("/colorselector/page", page_num);
    }
}

void ColorNotebook::switchPage(GtkNotebook*,
                              GtkWidget*,
                              guint page_num)
{
    SPColorSelector* csel;
    GtkWidget* widget;

    if ( gtk_notebook_get_current_page (GTK_NOTEBOOK (_book)) >= 0 )
    {
        csel = getCurrentSelector();
        csel->base->getColorAlpha(_color, _alpha);
    }
    widget = gtk_notebook_get_nth_page (GTK_NOTEBOOK (_book), page_num);
    if ( widget && SP_IS_COLOR_SELECTOR (widget) )
    {
        csel = SP_COLOR_SELECTOR (widget);
        csel->base->setColorAlpha( _color, _alpha );

        // Temporary workaround to undo a spurious GRABBED
        _released();
    }
}

static gint sp_color_notebook_menu_handler( GtkWidget *widget, GdkEvent *event )
{
    if (event->type == GDK_BUTTON_PRESS)
    {
        SPColorSelector* csel = SP_COLOR_SELECTOR(widget);
        ((ColorNotebook*)(csel->base))->menuHandler( event );

        /* Tell calling code that we have handled this event; the buck
         * stops here. */
        return TRUE;
    }

    /* Tell calling code that we have not handled this event; pass it on. */
    return FALSE;
}

gint ColorNotebook::menuHandler( GdkEvent* event )
{
    GdkEventButton *bevent = (GdkEventButton *) event;
    gtk_menu_popup (GTK_MENU( _popup ), NULL, NULL, NULL, NULL,
                    bevent->button, bevent->time);
    return TRUE;
}

static void sp_color_notebook_menuitem_response (GtkMenuItem *menuitem, gpointer user_data)
{
    gboolean active = FALSE;

    active = gtk_check_menu_item_get_active (GTK_CHECK_MENU_ITEM (menuitem));
    SPColorNotebookTracker *entry = reinterpret_cast< SPColorNotebookTracker* > (user_data);
    if ( entry )
    {
        if ( active )
        {
            ((ColorNotebook*)(SP_COLOR_SELECTOR(entry->backPointer)->base))->addPage(entry->type, entry->submode);
        }
        else
        {
            ((ColorNotebook*)(SP_COLOR_SELECTOR(entry->backPointer)->base))->removePage(entry->type, entry->submode);
        }
    }
}

static void
sp_color_notebook_init (SPColorNotebook *colorbook)
{
    SP_COLOR_SELECTOR(colorbook)->base = new ColorNotebook( SP_COLOR_SELECTOR(colorbook) );

    if ( SP_COLOR_SELECTOR(colorbook)->base )
    {
        SP_COLOR_SELECTOR(colorbook)->base->init();
    }
}

void ColorNotebook::init()
{
    GtkWidget* table = 0;
    guint row = 0;
    guint i = 0;
    guint j = 0;
    GType *selector_types = 0;
    guint selector_type_count = 0;

    /* tempory hardcoding to get types loaded */
    SP_TYPE_COLOR_SCALES;
    SP_TYPE_COLOR_WHEEL_SELECTOR;
#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
    SP_TYPE_COLOR_ICC_SELECTOR;
#endif // defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)

    /* REJON: Comment out the next line to not use the normal GTK Color
           wheel. */

//        SP_TYPE_COLOR_GTKSELECTOR;

    _updating = FALSE;
    _updatingrgba = FALSE;
    _btn = 0;
    _popup = 0;
    _trackerList = g_ptr_array_new ();

    _book = gtk_notebook_new ();
    gtk_widget_show (_book);

    selector_types = g_type_children (SP_TYPE_COLOR_SELECTOR, &selector_type_count);

    for ( i = 0; i < selector_type_count; i++ )
    {
        if (!g_type_is_a (selector_types[i], SP_TYPE_COLOR_NOTEBOOK))
        {
            guint howmany = 1;
            gpointer klass = g_type_class_ref (selector_types[i]);
            if ( klass && SP_IS_COLOR_SELECTOR_CLASS (klass) )
            {
                SPColorSelectorClass *ck = SP_COLOR_SELECTOR_CLASS (klass);
                howmany = MAX (1, ck->submode_count);
                for ( j = 0; j < howmany; j++ )
                {
                    SPColorNotebookTracker *entry = reinterpret_cast< SPColorNotebookTracker* > (malloc(sizeof(SPColorNotebookTracker)));
                    if ( entry )
                    {
                        memset( entry, 0, sizeof(SPColorNotebookTracker) );
                        entry->name = ck->name[j];
                        entry->type = selector_types[i];
                        entry->submode = j;
                        entry->enabledFull = TRUE;
                        entry->enabledBrief = TRUE;
                        entry->backPointer = SP_COLOR_NOTEBOOK(_csel);

                        g_ptr_array_add (_trackerList, entry);
                    }
                }
            }
        }
    }

    for ( i = 0; i < _trackerList->len; i++ )
    {
        SPColorNotebookTracker *entry =
            reinterpret_cast< SPColorNotebookTracker* > (g_ptr_array_index (_trackerList, i));
        if ( entry )
        {
            addPage(entry->type, entry->submode);
        }
    }

    table = gtk_table_new (2, 3, FALSE);
    gtk_widget_show (table);

    gtk_box_pack_start (GTK_BOX (_csel), table, TRUE, TRUE, 0);

    gtk_table_attach (GTK_TABLE (table), _book, 0, 2, row, row + 1,
                      static_cast<GtkAttachOptions>(GTK_EXPAND|GTK_FILL),
                      static_cast<GtkAttachOptions>(GTK_EXPAND|GTK_FILL),
                      XPAD, YPAD);

    // restore the last active page
    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
    gtk_notebook_set_current_page (GTK_NOTEBOOK (_book), prefs->getInt("/colorselector/page", 0));

    {
        gboolean found = FALSE;

        _popup = gtk_menu_new();
        GtkMenu *menu = GTK_MENU (_popup);

        for ( i = 0; i < _trackerList->len; i++ )
        {
            SPColorNotebookTracker *entry = reinterpret_cast< SPColorNotebookTracker* > (g_ptr_array_index (_trackerList, i));
            if ( entry )
            {
                GtkWidget *item = gtk_check_menu_item_new_with_label (_(entry->name));
                gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (item), entry->enabledFull);
                gtk_widget_show (item);
                gtk_menu_shell_append (GTK_MENU_SHELL(menu), item);

                g_signal_connect (G_OBJECT (item), "activate",
                                  G_CALLBACK (sp_color_notebook_menuitem_response),
                                  reinterpret_cast< gpointer > (entry) );
                found = TRUE;
            }
        }

        GtkWidget *arrow = gtk_arrow_new(GTK_ARROW_RIGHT, GTK_SHADOW_NONE);
        gtk_widget_show (arrow);

        _btn = gtk_button_new ();
        gtk_widget_show (_btn);
        gtk_container_add (GTK_CONTAINER (_btn), arrow);

        GtkWidget *align = gtk_alignment_new (1.0, 0.0, 0.0, 0.0);
        gtk_widget_show (align);
        gtk_container_add (GTK_CONTAINER (align), _btn);

        // uncomment to reenable the "show/hide modes" menu,
        // but first fix it so it remembers its settings in prefs and does not take that much space (entire vertical column!)
        //gtk_table_attach (GTK_TABLE (table), align, 2, 3, row, row + 1, GTK_FILL, GTK_FILL, XPAD, YPAD);

        g_signal_connect_swapped(G_OBJECT(_btn), "event", G_CALLBACK (sp_color_notebook_menu_handler), G_OBJECT(_csel));
        if ( !found )
        {
            gtk_widget_set_sensitive (_btn, FALSE);
        }
    }

    row++;

    GtkWidget *rgbabox = gtk_hbox_new (FALSE, 0);

#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
    /* Create color management icons */
    _box_colormanaged = gtk_event_box_new ();
    GtkWidget *colormanaged = gtk_image_new_from_icon_name ("color-management-icon", GTK_ICON_SIZE_SMALL_TOOLBAR);
    gtk_container_add (GTK_CONTAINER (_box_colormanaged), colormanaged);
    gtk_widget_set_tooltip_text (_box_colormanaged, _("Color Managed"));
    gtk_widget_set_sensitive (_box_colormanaged, false);
    gtk_box_pack_start(GTK_BOX(rgbabox), _box_colormanaged, FALSE, FALSE, 2);

    _box_outofgamut = gtk_event_box_new ();
    GtkWidget *outofgamut = gtk_image_new_from_icon_name ("out-of-gamut-icon", GTK_ICON_SIZE_SMALL_TOOLBAR);
    gtk_container_add (GTK_CONTAINER (_box_outofgamut), outofgamut);
    gtk_widget_set_tooltip_text (_box_outofgamut, _("Out of gamut!"));
    gtk_widget_set_sensitive (_box_outofgamut, false);
    gtk_box_pack_start(GTK_BOX(rgbabox), _box_outofgamut, FALSE, FALSE, 2);

    _box_toomuchink = gtk_event_box_new ();
    GtkWidget *toomuchink = gtk_image_new_from_icon_name ("too-much-ink-icon", GTK_ICON_SIZE_SMALL_TOOLBAR);
    gtk_container_add (GTK_CONTAINER (_box_toomuchink), toomuchink);
    gtk_widget_set_tooltip_text (_box_toomuchink, _("Too much ink!"));
    gtk_widget_set_sensitive (_box_toomuchink, false);
    gtk_box_pack_start(GTK_BOX(rgbabox), _box_toomuchink, FALSE, FALSE, 2);

#endif //defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)

    /* Create RGBA entry and color preview */
    _rgbal = gtk_label_new_with_mnemonic (_("RGBA_:"));
    gtk_misc_set_alignment (GTK_MISC (_rgbal), 1.0, 0.5);
    gtk_box_pack_start(GTK_BOX(rgbabox), _rgbal, TRUE, TRUE, 2);

    _rgbae = gtk_entry_new ();
    sp_dialog_defocus_on_enter (_rgbae);
    gtk_entry_set_max_length (GTK_ENTRY (_rgbae), 8);
    gtk_entry_set_width_chars (GTK_ENTRY (_rgbae), 8);
    gtk_widget_set_tooltip_text (_rgbae, _("Hexadecimal RGBA value of the color"));
    gtk_box_pack_start(GTK_BOX(rgbabox), _rgbae, FALSE, FALSE, 0);
    gtk_label_set_mnemonic_widget (GTK_LABEL(_rgbal), _rgbae);

    sp_set_font_size_smaller (rgbabox);
    gtk_widget_show_all (rgbabox);

#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
    //the "too much ink" icon is initially hidden
    gtk_widget_hide(GTK_WIDGET(_box_toomuchink));
#endif //defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)

    gtk_table_attach (GTK_TABLE (table), rgbabox, 0, 2, row, row + 1, GTK_FILL, GTK_SHRINK, XPAD, YPAD);

#ifdef SPCS_PREVIEW
    _p = sp_color_preview_new (0xffffffff);
    gtk_widget_show (_p);
    gtk_table_attach (GTK_TABLE (table), _p, 2, 3, row, row + 1, GTK_FILL, GTK_FILL, XPAD, YPAD);
#endif

    _switchId = g_signal_connect(G_OBJECT (_book), "switch-page",
                                 G_CALLBACK (sp_color_notebook_switch_page), SP_COLOR_NOTEBOOK(_csel));

    _entryId = g_signal_connect (G_OBJECT (_rgbae), "changed", G_CALLBACK (ColorNotebook::_rgbaEntryChangedHook), _csel);
}

static void
sp_color_notebook_destroy (GtkObject *object)
{
    if (((GtkObjectClass *) (parent_class))->destroy)
        (* ((GtkObjectClass *) (parent_class))->destroy) (object);
}

ColorNotebook::~ColorNotebook()
{
    if ( _trackerList )
    {
        g_ptr_array_free (_trackerList, TRUE);
        _trackerList = 0;
    }

    if ( _switchId )
    {
        if ( _book )
        {
            g_signal_handler_disconnect (_book, _switchId);
            _switchId = 0;
        }
    }
}

static void
sp_color_notebook_show_all (GtkWidget *widget)
{
    gtk_widget_show (widget);
}

static void
sp_color_notebook_hide_all (GtkWidget *widget)
{
    gtk_widget_hide (widget);
}

GtkWidget *
sp_color_notebook_new (void)
{
    SPColorNotebook *colorbook;

    colorbook = (SPColorNotebook*)g_object_new (SP_TYPE_COLOR_NOTEBOOK, NULL);

    return GTK_WIDGET (colorbook);
}

ColorNotebook::ColorNotebook( SPColorSelector* csel )
    : ColorSelector( csel )
{
}

SPColorSelector* ColorNotebook::getCurrentSelector()
{
    SPColorSelector* csel = NULL;
    gint current_page = gtk_notebook_get_current_page (GTK_NOTEBOOK (_book));

    if ( current_page >= 0 )
    {
        GtkWidget* widget = gtk_notebook_get_nth_page (GTK_NOTEBOOK (_book), current_page);
        if ( SP_IS_COLOR_SELECTOR (widget) )
        {
            csel = SP_COLOR_SELECTOR (widget);
        }
    }

    return csel;
}

void ColorNotebook::_colorChanged()
{
    SPColorSelector* cselPage = getCurrentSelector();
    if ( cselPage )
    {
        cselPage->base->setColorAlpha( _color, _alpha );
    }

    _updateRgbaEntry( _color, _alpha );
}

void ColorNotebook::_rgbaEntryChangedHook(GtkEntry *entry, SPColorNotebook *colorbook)
{
    ((ColorNotebook*)(SP_COLOR_SELECTOR(colorbook)->base))->_rgbaEntryChanged( entry );
}

void ColorNotebook::_rgbaEntryChanged(GtkEntry* entry)
{
    if (_updating) return;
    if (_updatingrgba) return;

    const gchar *t = gtk_entry_get_text( entry );

    if (t) {
        Glib::ustring text = t;
        bool changed = false;
        if (!text.empty() && text[0] == '#') {
            changed = true;
            text.erase(0,1);
            if (text.size() == 6) {
                // it was a standard RGB hex
                unsigned int alph = SP_COLOR_F_TO_U(_alpha);
                gchar* tmp = g_strdup_printf("%02x", alph);
                text += tmp;
                g_free(tmp);
            }
        }
        gchar* str = g_strdup(text.c_str());
        gchar* end = 0;
        guint64 rgba = g_ascii_strtoull( str, &end, 16 );
        if ( end != str ) {
            ptrdiff_t len = end - str;
            if ( len < 8 ) {
                rgba = rgba << ( 4 * ( 8 - len ) );
            }
            _updatingrgba = TRUE;
            if ( changed ) {
                gtk_entry_set_text( entry, str );
            }
            SPColor color( rgba );
            setColorAlpha( color, SP_RGBA32_A_F(rgba), true );
            _updatingrgba = FALSE;
        }
        g_free(str);
    }
}

// TODO pass in param so as to avoid the need for SP_ACTIVE_DOCUMENT
void ColorNotebook::_updateRgbaEntry( const SPColor& color, gfloat alpha )
{
    g_return_if_fail( ( 0.0 <= alpha ) && ( alpha <= 1.0 ) );

#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
    /* update color management icon*/
    gtk_widget_set_sensitive (_box_colormanaged, color.icc != NULL);

    /* update out-of-gamut icon */
    gtk_widget_set_sensitive (_box_outofgamut, false);
    if (color.icc){
        Inkscape::ColorProfile* target_profile = SP_ACTIVE_DOCUMENT->profileManager->find(color.icc->colorProfile.c_str());
        if ( target_profile )
            gtk_widget_set_sensitive(_box_outofgamut, target_profile->GamutCheck(color));
    }

    /* update too-much-ink icon */
    gtk_widget_set_sensitive (_box_toomuchink, false);
    if (color.icc){
        Inkscape::ColorProfile* prof = SP_ACTIVE_DOCUMENT->profileManager->find(color.icc->colorProfile.c_str());
        if ( prof && CMSSystem::isPrintColorSpace(prof) ) {
            gtk_widget_show(GTK_WIDGET(_box_toomuchink));
            double ink_sum = 0;
            for (unsigned int i=0; i<color.icc->colors.size(); i++){
                ink_sum += color.icc->colors[i];
            }

            /* Some literature states that when the sum of paint values exceed 320%, it is considered to be a satured color,
                which means the paper can get too wet due to an excessive ammount of ink. This may lead to several issues
                such as misalignment and poor quality of printing in general.*/
            if ( ink_sum > 3.2 )
                gtk_widget_set_sensitive (_box_toomuchink, true);
        } else {
            gtk_widget_hide(GTK_WIDGET(_box_toomuchink));
        }
    }
#endif //defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)

    if ( !_updatingrgba )
    {
        gchar s[32];
        guint32 rgba;

        /* Update RGBA entry */
        rgba = color.toRGBA32( alpha );

        g_snprintf (s, 32, "%08x", rgba);
        const gchar* oldText = gtk_entry_get_text( GTK_ENTRY( _rgbae ) );
        if ( strcmp( oldText, s ) != 0 )
        {
            g_signal_handler_block( _rgbae, _entryId );
            gtk_entry_set_text( GTK_ENTRY(_rgbae), s );
            g_signal_handler_unblock( _rgbae, _entryId );
        }
    }
}

void ColorNotebook::_entryGrabbed (SPColorSelector *, SPColorNotebook *colorbook)
{
    ColorNotebook* nb = (ColorNotebook*)(SP_COLOR_SELECTOR(colorbook)->base);
    nb->_grabbed();
}

void ColorNotebook::_entryDragged (SPColorSelector *csel, SPColorNotebook *colorbook)
{
    gboolean oldState;
    ColorNotebook* nb = (ColorNotebook*)(SP_COLOR_SELECTOR(colorbook)->base);

    oldState = nb->_dragging;

    nb->_dragging = TRUE;
    nb->_entryModified( csel, colorbook );

    nb->_dragging = oldState;
}

void ColorNotebook::_entryReleased (SPColorSelector *, SPColorNotebook *colorbook)
{
    ColorNotebook* nb = (ColorNotebook*)(SP_COLOR_SELECTOR(colorbook)->base);
    nb->_released();
}

void ColorNotebook::_entryChanged (SPColorSelector *csel, SPColorNotebook *colorbook)
{
    gboolean oldState;
    ColorNotebook* nb = (ColorNotebook*)(SP_COLOR_SELECTOR(colorbook)->base);

    oldState = nb->_dragging;

    nb->_dragging = FALSE;
    nb->_entryModified( csel, colorbook );

    nb->_dragging = oldState;
}

void ColorNotebook::_entryModified (SPColorSelector *csel, SPColorNotebook *colorbook)
{
    g_return_if_fail (colorbook != NULL);
    g_return_if_fail (SP_IS_COLOR_NOTEBOOK (colorbook));
    g_return_if_fail (csel != NULL);
    g_return_if_fail (SP_IS_COLOR_SELECTOR (csel));

    ColorNotebook* nb = (ColorNotebook*)(SP_COLOR_SELECTOR(colorbook)->base);
    SPColor color;
    gfloat alpha = 1.0;

    csel->base->getColorAlpha( color, alpha );
    nb->_updateRgbaEntry( color, alpha );
    nb->_updateInternals( color, alpha, nb->_dragging );
}

GtkWidget* ColorNotebook::addPage(GType page_type, guint submode)
{
    GtkWidget *page;

    page = sp_color_selector_new( page_type );
    if ( page )
    {
        GtkWidget* tab_label = 0;
        SPColorSelector* csel;

        csel = SP_COLOR_SELECTOR (page);
        if ( submode > 0 )
        {
            csel->base->setSubmode( submode );
        }
        gtk_widget_show (page);
        int index = csel->base ? csel->base->getSubmode() : 0;
        const gchar* str = _(SP_COLOR_SELECTOR_GET_CLASS (csel)->name[index]);
//         g_message( "Hitting up for tab for '%s'", str );
        tab_label = gtk_label_new(_(str));
        gtk_notebook_append_page( GTK_NOTEBOOK (_book), page, tab_label );
        g_signal_connect (G_OBJECT (page), "grabbed", G_CALLBACK (_entryGrabbed), _csel);
        g_signal_connect (G_OBJECT (page), "dragged", G_CALLBACK (_entryDragged), _csel);
        g_signal_connect (G_OBJECT (page), "released", G_CALLBACK (_entryReleased), _csel);
        g_signal_connect (G_OBJECT (page), "changed", G_CALLBACK (_entryChanged), _csel);
    }

    return page;
}

GtkWidget* ColorNotebook::getPage(GType page_type, guint submode)
{
    gint count = 0;
    gint i = 0;
    GtkWidget* page = 0;

//     count = gtk_notebook_get_n_pages (_book);
    count = 200;
    for ( i = 0; i < count && !page; i++ )
    {
        page = gtk_notebook_get_nth_page (GTK_NOTEBOOK (_book), i);
        if ( page )
        {
            SPColorSelector* csel;
            guint pagemode;
            csel = SP_COLOR_SELECTOR (page);
            pagemode = csel->base->getSubmode();
            if ( G_TYPE_FROM_INSTANCE (page) == page_type
                 && pagemode == submode )
            {
                // found it.
                break;
            }
            else
            {
                page = 0;
            }
        }
        else
        {
            break;
        }
    }
    return page;
}

void ColorNotebook::removePage( GType page_type, guint submode )
{
    GtkWidget *page = 0;

    page = getPage(page_type, submode);
    if ( page )
    {
        gint where = gtk_notebook_page_num (GTK_NOTEBOOK (_book), page);
        if ( where >= 0 )
        {
            if ( gtk_notebook_get_current_page (GTK_NOTEBOOK (_book)) == where )
            {
//                 getColorAlpha(_color, &_alpha);
            }
            gtk_notebook_remove_page (GTK_NOTEBOOK (_book), where);
        }
    }
}

/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :