src/widgets/gradient-selector.cpp

   1 /*
   2  * Gradient vector widget
   3  *
   4  * Authors:
   5  *   Lauris Kaplinski <lauris@kaplinski.com>
   6  *   bulia byak <buliabyak@users.sf.net>
   7  *   Jon A. Cruz <jon@joncruz.org>
   8  *
   9  * Copyright (C) 2001-2002 Lauris Kaplinski
  10  * Copyright (C) 2001 Ximian, Inc.
  11  * Copyright (C) 2010 Jon A. Cruz
  12  *
  13  * Released under GNU GPL, read the file 'COPYING' for more information
  14  */
  15
  16 #ifdef HAVE_CONFIG_H
  17 # include "config.h"
  18 #endif
  19 #include <gtk/gtkhbox.h>
  20 #include <gtk/gtklabel.h>
  21 #include <gtk/gtkoptionmenu.h>
  22 #include <gtk/gtkmenuitem.h>
  23 #include <gtk/gtktooltips.h>
  24
  25 #include "document.h"
  26 #include "../document-private.h"
  27 #include "../gradient-chemistry.h"
  28
  29 #include <glibmm/i18n.h>
  30 #include <xml/repr.h>
  31
  32 #include "gradient-vector.h"
  33
  34 #include "gradient-selector.h"
  35
  36 enum {
  37     GRABBED,
  38     DRAGGED,
  39     RELEASED,
  40     CHANGED,
  41     LAST_SIGNAL
  42 };
  43
  44 static void sp_gradient_selector_class_init (SPGradientSelectorClass *klass);
  45 static void sp_gradient_selector_init (SPGradientSelector *selector);
  46 static void sp_gradient_selector_destroy (GtkObject *object);
  47
  48 /* Signal handlers */
  49 static void sp_gradient_selector_vector_set (SPGradientVectorSelector *gvs, SPGradient *gr, SPGradientSelector *sel);
  50 static void sp_gradient_selector_edit_vector_clicked (GtkWidget *w, SPGradientSelector *sel);
  51 static void sp_gradient_selector_add_vector_clicked (GtkWidget *w, SPGradientSelector *sel);
  52
  53 static void sp_gradient_selector_spread_activate (GtkWidget *widget, SPGradientSelector *sel);
  54
  55 static GtkVBoxClass *parent_class;
  56 static guint signals[LAST_SIGNAL] = {0};
  57
  58 GType sp_gradient_selector_get_type(void)
  59 {
  60     static GType type = 0;
  61     if (!type) {
  62         static const GTypeInfo info = {
  63             sizeof(SPGradientSelectorClass),
  64             NULL, /* base_init */
  65             NULL, /* base_finalize */
  66             (GClassInitFunc) sp_gradient_selector_class_init,
  67             NULL, /* class_finalize */
  68             NULL, /* class_data */
  69             sizeof(SPGradientSelector),
  70             0,    /* n_preallocs */
  71             (GInstanceInitFunc) sp_gradient_selector_init,
  72             0,    /* value_table */
  73         };
  74
  75         type = g_type_register_static( GTK_TYPE_VBOX,
  76                                        "SPGradientSelector",
  77                                        &info,
  78                                        static_cast< GTypeFlags > (0) );
  79     }
  80     return type;
  81 }
  82
  83 static void
  84 sp_gradient_selector_class_init (SPGradientSelectorClass *klass)
  85 {
  86     GtkObjectClass *object_class;
  87
  88     object_class = (GtkObjectClass *) klass;
  89
  90     parent_class = (GtkVBoxClass*)gtk_type_class (GTK_TYPE_VBOX);
  91
  92     signals[GRABBED] =  gtk_signal_new ("grabbed",
  93                                         (GtkSignalRunType)(GTK_RUN_FIRST | GTK_RUN_NO_RECURSE),
  94                                         GTK_CLASS_TYPE(object_class),
  95                                         GTK_SIGNAL_OFFSET (SPGradientSelectorClass, grabbed),
  96                                         gtk_marshal_NONE__NONE,
  97                                         GTK_TYPE_NONE, 0);
  98     signals[DRAGGED] =  gtk_signal_new ("dragged",
  99                                         (GtkSignalRunType)(GTK_RUN_FIRST | GTK_RUN_NO_RECURSE),
 100                                         GTK_CLASS_TYPE(object_class),
 101                                         GTK_SIGNAL_OFFSET (SPGradientSelectorClass, dragged),
 102                                         gtk_marshal_NONE__NONE,
 103                                         GTK_TYPE_NONE, 0);
 104     signals[RELEASED] = gtk_signal_new ("released",
 105                                         (GtkSignalRunType)(GTK_RUN_FIRST | GTK_RUN_NO_RECURSE),
 106                                         GTK_CLASS_TYPE(object_class),
 107                                         GTK_SIGNAL_OFFSET (SPGradientSelectorClass, released),
 108                                         gtk_marshal_NONE__NONE,
 109                                         GTK_TYPE_NONE, 0);
 110     signals[CHANGED] =  gtk_signal_new ("changed",
 111                                         (GtkSignalRunType)(GTK_RUN_FIRST | GTK_RUN_NO_RECURSE),
 112                                         GTK_CLASS_TYPE(object_class),
 113                                         GTK_SIGNAL_OFFSET (SPGradientSelectorClass, changed),
 114                                         gtk_marshal_NONE__NONE,
 115                                         GTK_TYPE_NONE, 0);
 116
 117     object_class->destroy = sp_gradient_selector_destroy;
 118 }
 119
 120 static void
 121 sp_gradient_selector_init (SPGradientSelector *sel)
 122 {
 123     GtkWidget *hb, *m, *mi;
 124
 125     sel->mode = SPGradientSelector::MODE_LINEAR;
 126
 127     sel->gradientUnits = SP_GRADIENT_UNITS_USERSPACEONUSE;
 128     sel->gradientSpread = SP_GRADIENT_SPREAD_PAD;
 129
 130     /* Vectors */
 131     sel->vectors = sp_gradient_vector_selector_new (NULL, NULL);
 132     gtk_widget_show (sel->vectors);
 133     gtk_box_pack_start (GTK_BOX (sel), sel->vectors, FALSE, FALSE, 0);
 134     g_signal_connect (G_OBJECT (sel->vectors), "vector_set", G_CALLBACK (sp_gradient_selector_vector_set), sel);
 135
 136     /* Create box for buttons */
 137     hb = gtk_hbox_new (FALSE, 0);
 138     gtk_box_pack_start (GTK_BOX (sel), hb, FALSE, FALSE, 0);
 139     GtkTooltips *ttips = gtk_tooltips_new ();
 140
 141     sel->add = gtk_button_new_with_label (_("Duplicate"));
 142     gtk_box_pack_start (GTK_BOX (hb), sel->add, TRUE, TRUE, 0);
 143     g_signal_connect (G_OBJECT (sel->add), "clicked", G_CALLBACK (sp_gradient_selector_add_vector_clicked), sel);
 144     gtk_widget_set_sensitive (sel->add, FALSE);
 145
 146     sel->edit = gtk_button_new_with_label (_("Edit..."));
 147     gtk_box_pack_start (GTK_BOX (hb), sel->edit, TRUE, TRUE, 0);
 148     g_signal_connect (G_OBJECT (sel->edit), "clicked", G_CALLBACK (sp_gradient_selector_edit_vector_clicked), sel);
 149     gtk_widget_set_sensitive (sel->edit, FALSE);
 150
 151     gtk_widget_show_all (hb);
 152
 153     /* Spread selector */
 154     hb = gtk_hbox_new (FALSE, 0);
 155     gtk_widget_show (hb);
 156     gtk_box_pack_start (GTK_BOX (sel), hb, FALSE, FALSE, 0);
 157
 158     sel->spread = gtk_option_menu_new ();
 159     gtk_widget_show (sel->spread);
 160     gtk_box_pack_end (GTK_BOX (hb), sel->spread, FALSE, FALSE, 0);
 161     gtk_tooltips_set_tip (ttips, sel->spread,
 162                           // TRANSLATORS: for info, see http://www.w3.org/TR/2000/CR-SVG-20000802/pservers.html#LinearGradientSpreadMethodAttribute
 163                           _("Whether to fill with flat color beyond the ends of the gradient vector "
 164                             "(spreadMethod=\"pad\"), or repeat the gradient in the same direction "
 165                             "(spreadMethod=\"repeat\"), or repeat the gradient in alternating opposite "
 166                             "directions (spreadMethod=\"reflect\")"), NULL);
 167
 168     m = gtk_menu_new ();
 169     mi = gtk_menu_item_new_with_label (_("none"));
 170     gtk_menu_append (GTK_MENU (m), mi);
 171     g_object_set_data (G_OBJECT (mi), "gradientSpread", GUINT_TO_POINTER (SP_GRADIENT_SPREAD_PAD));
 172     g_signal_connect (G_OBJECT (mi), "activate", G_CALLBACK (sp_gradient_selector_spread_activate), sel);
 173     mi = gtk_menu_item_new_with_label (_("reflected"));
 174     g_object_set_data (G_OBJECT (mi), "gradientSpread", GUINT_TO_POINTER (SP_GRADIENT_SPREAD_REFLECT));
 175     g_signal_connect (G_OBJECT (mi), "activate", G_CALLBACK (sp_gradient_selector_spread_activate), sel);
 176     gtk_menu_append (GTK_MENU (m), mi);
 177     mi = gtk_menu_item_new_with_label (_("direct"));
 178     g_object_set_data (G_OBJECT (mi), "gradientSpread", GUINT_TO_POINTER (SP_GRADIENT_SPREAD_REPEAT));
 179     g_signal_connect (G_OBJECT (mi), "activate", G_CALLBACK (sp_gradient_selector_spread_activate), sel);
 180     gtk_menu_append (GTK_MENU (m), mi);
 181     gtk_widget_show_all (m);
 182
 183     gtk_option_menu_set_menu (GTK_OPTION_MENU (sel->spread), m);
 184
 185     sel->spreadLbl = gtk_label_new (_("Repeat:"));
 186     gtk_widget_show(sel->spreadLbl);
 187     gtk_box_pack_end(GTK_BOX(hb), sel->spreadLbl, FALSE, FALSE, 4);
 188 }
 189
 190 static void
 191 sp_gradient_selector_destroy (GtkObject *object)
 192 {
 193     SPGradientSelector *sel;
 194
 195     sel = SP_GRADIENT_SELECTOR (object);
 196
 197     if (((GtkObjectClass *) (parent_class))->destroy)
 198         (* ((GtkObjectClass *) (parent_class))->destroy) (object);
 199 }
 200
 201 GtkWidget *
 202 sp_gradient_selector_new (void)
 203 {
 204     SPGradientSelector *sel;
 205
 206     sel = (SPGradientSelector*)gtk_type_new (SP_TYPE_GRADIENT_SELECTOR);
 207
 208     return (GtkWidget *) sel;
 209 }
 210
 211 static void removeWidget( GtkWidget *& widget )
 212 {
 213     if (widget) {
 214         GtkWidget *parent = gtk_widget_get_parent(widget);
 215         if (parent) {
 216             gtk_container_remove(GTK_CONTAINER(parent), widget);
 217             widget = 0;
 218         }
 219     }
 220 }
 221
 222 void SPGradientSelector::setMode(SelectorMode mode)
 223 {
 224     if (mode != this->mode) {
 225         this->mode = mode;
 226         if (mode == MODE_SWATCH) {
 227             removeWidget(add);
 228             removeWidget(edit);
 229             removeWidget(spread);
 230             removeWidget(spreadLbl);
 231
 232             SPGradientVectorSelector* vs = SP_GRADIENT_VECTOR_SELECTOR(vectors);
 233             vs->setSwatched();
 234         }
 235     }
 236 }
 237
 238 void SPGradientSelector::setUnits(SPGradientUnits units)
 239 {
 240     gradientUnits = units;
 241 }
 242
 243 void SPGradientSelector::setSpread(SPGradientSpread spread)
 244 {
 245     gradientSpread = spread;
 246
 247     gtk_option_menu_set_history(GTK_OPTION_MENU(this->spread), gradientSpread);
 248 }
 249
 250 SPGradientUnits SPGradientSelector::getUnits()
 251 {
 252     return gradientUnits;
 253 }
 254
 255 SPGradientSpread SPGradientSelector::getSpread()
 256 {
 257     return gradientSpread;
 258 }
 259
 260 void SPGradientSelector::setVector(SPDocument *doc, SPGradient *vector)
 261 {
 262     g_return_if_fail(!vector || SP_IS_GRADIENT(vector));
 263     g_return_if_fail(!vector || (SP_OBJECT_DOCUMENT(vector) == doc));
 264
 265     if (vector && !vector->hasStops()) {
 266         return;
 267     }
 268
 269     sp_gradient_vector_selector_set_gradient(SP_GRADIENT_VECTOR_SELECTOR(vectors), doc, vector);
 270
 271     if (vector) {
 272         if (edit) {
 273             gtk_widget_set_sensitive(edit, TRUE);
 274         }
 275         if (add) {
 276             gtk_widget_set_sensitive(add, TRUE);
 277         }
 278     } else {
 279         if (edit) {
 280             gtk_widget_set_sensitive(edit, FALSE);
 281         }
 282         if (add) {
 283             gtk_widget_set_sensitive(add, (doc != NULL));
 284         }
 285     }
 286 }
 287
 288 SPGradient *SPGradientSelector::getVector()
 289 {
 290     /* fixme: */
 291     return SP_GRADIENT_VECTOR_SELECTOR(vectors)->gr;
 292 }
 293
 294 static void
 295 sp_gradient_selector_vector_set (SPGradientVectorSelector */*gvs*/, SPGradient *gr, SPGradientSelector *sel)
 296 {
 297     static gboolean blocked = FALSE;
 298
 299     if (!blocked) {
 300         blocked = TRUE;
 301         gr = sp_gradient_ensure_vector_normalized (gr);
 302         sel->setVector((gr) ? SP_OBJECT_DOCUMENT (gr) : 0, gr);
 303         g_signal_emit (G_OBJECT (sel), signals[CHANGED], 0, gr);
 304         blocked = FALSE;
 305     }
 306 }
 307
 308 static void
 309 sp_gradient_selector_edit_vector_clicked (GtkWidget */*w*/, SPGradientSelector *sel)
 310 {
 311     GtkWidget *dialog;
 312
 313     /* fixme: */
 314     dialog = sp_gradient_vector_editor_new (SP_GRADIENT_VECTOR_SELECTOR (sel->vectors)->gr);
 315
 316     gtk_widget_show (dialog);
 317 }
 318
 319 static void
 320 sp_gradient_selector_add_vector_clicked (GtkWidget */*w*/, SPGradientSelector *sel)
 321 {
 322     SPDocument *doc = sp_gradient_vector_selector_get_document (
 323                                                                 SP_GRADIENT_VECTOR_SELECTOR (sel->vectors));
 324
 325     if (!doc)
 326         return;
 327
 328     SPGradient *gr = sp_gradient_vector_selector_get_gradient(
 329                                                               SP_GRADIENT_VECTOR_SELECTOR (sel->vectors));
 330     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 331
 332     Inkscape::XML::Node *repr = NULL;
 333
 334     if (gr)
 335         repr = SP_OBJECT_REPR (gr)->duplicate(xml_doc);
 336     else {
 337         repr = xml_doc->createElement("svg:linearGradient");
 338         Inkscape::XML::Node *stop = xml_doc->createElement("svg:stop");
 339         stop->setAttribute("offset", "0");
 340         stop->setAttribute("style", "stop-color:#000;stop-opacity:1;");
 341         repr->appendChild(stop);
 342         Inkscape::GC::release(stop);
 343         stop = xml_doc->createElement("svg:stop");
 344         stop->setAttribute("offset", "1");
 345         stop->setAttribute("style", "stop-color:#fff;stop-opacity:1;");
 346         repr->appendChild(stop);
 347         Inkscape::GC::release(stop);
 348     }
 349
 350     SP_OBJECT_REPR (SP_DOCUMENT_DEFS (doc))->addChild(repr, NULL);
 351
 352     gr = (SPGradient *) doc->getObjectByRepr(repr);
 353     sp_gradient_vector_selector_set_gradient(
 354                                              SP_GRADIENT_VECTOR_SELECTOR (sel->vectors), doc, gr);
 355
 356     Inkscape::GC::release(repr);
 357 }
 358
 359
 360
 361 static void
 362 sp_gradient_selector_spread_activate (GtkWidget *widget, SPGradientSelector *sel)
 363 {
 364     sel->gradientSpread = (SPGradientSpread)GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (widget), "gradientSpread"));
 365
 366     g_signal_emit (G_OBJECT (sel), signals[CHANGED], 0);
 367 }
 368
 369
 370 /*
 371   Local Variables:
 372   mode:c++
 373   c-file-style:"stroustrup"
 374   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 375   indent-tabs-mode:nil
 376   fill-column:99
 377   End:
 378 */
 379 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :