src/live_effects/lpeobject.cpp

   1 #define INKSCAPE_LIVEPATHEFFECT_OBJECT_CPP
   2
   3 /*
   4  * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
   5  *
   6  * Released under GNU GPL, read the file 'COPYING' for more information
   7  */
   8
   9 #include "xml/repr.h"
  10 #include "xml/node-event-vector.h"
  11 #include "sp-object.h"
  12 #include "attributes.h"
  13
  14 #include "document.h"
  15 #include <glibmm/i18n.h>
  16
  17 #include "live_effects/lpeobject.h"
  18 #include "live_effects/effect.h"
  19
  20 //#define LIVEPATHEFFECT_VERBOSE
  21
  22 static void livepatheffect_class_init(LivePathEffectObjectClass *klass);
  23 static void livepatheffect_init(LivePathEffectObject *stop);
  24
  25 static void livepatheffect_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
  26 static void livepatheffect_release(SPObject *object);
  27
  28 static void livepatheffect_set(SPObject *object, unsigned key, gchar const *value);
  29 static Inkscape::XML::Node *livepatheffect_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
  30
  31 static void livepatheffect_on_repr_attr_changed (Inkscape::XML::Node * repr, const gchar *key, const gchar *oldval, const gchar *newval, bool is_interactive, void * data);
  32
  33 static SPObjectClass *livepatheffect_parent_class;
  34 /**
  35  * Registers the LivePathEffect class with Gdk and returns its type number.
  36  */
  37 GType
  38 livepatheffect_get_type ()
  39 {
  40     static GType livepatheffect_type = 0;
  41
  42     if (!livepatheffect_type) {
  43         GTypeInfo livepatheffect_info = {
  44             sizeof (LivePathEffectObjectClass),
  45             NULL, NULL,
  46             (GClassInitFunc) livepatheffect_class_init,
  47             NULL, NULL,
  48             sizeof (LivePathEffectObject),
  49             16,
  50             (GInstanceInitFunc) livepatheffect_init,
  51             NULL,
  52         };
  53         livepatheffect_type = g_type_register_static (SP_TYPE_OBJECT, "LivePathEffectObject", &livepatheffect_info, (GTypeFlags)0);
  54     }
  55     return livepatheffect_type;
  56 }
  57
  58 static Inkscape::XML::NodeEventVector const livepatheffect_repr_events = {
  59     NULL, /* child_added */
  60     NULL, /* child_removed */
  61     livepatheffect_on_repr_attr_changed,
  62     NULL, /* content_changed */
  63     NULL  /* order_changed */
  64 };
  65
  66
  67 /**
  68  * Callback to initialize livepatheffect vtable.
  69  */
  70 static void
  71 livepatheffect_class_init(LivePathEffectObjectClass *klass)
  72 {
  73     SPObjectClass *sp_object_class = (SPObjectClass *) klass;
  74
  75     livepatheffect_parent_class = (SPObjectClass *) g_type_class_ref(SP_TYPE_OBJECT);
  76
  77     sp_object_class->build = livepatheffect_build;
  78     sp_object_class->release = livepatheffect_release;
  79
  80     sp_object_class->set = livepatheffect_set;
  81     sp_object_class->write = livepatheffect_write;
  82 }
  83
  84 /**
  85  * Callback to initialize livepatheffect object.
  86  */
  87 static void
  88 livepatheffect_init(LivePathEffectObject *lpeobj)
  89 {
  90 #ifdef LIVEPATHEFFECT_VERBOSE
  91     g_message("Init livepatheffectobject");
  92 #endif
  93     lpeobj->effecttype = Inkscape::LivePathEffect::INVALID_LPE;
  94     lpeobj->lpe = NULL;
  95
  96     lpeobj->effecttype_set = false;
  97 }
  98
  99 /**
 100  * Virtual build: set livepatheffect attributes from its associated XML node.
 101  */
 102 static void
 103 livepatheffect_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
 104 {
 105 #ifdef LIVEPATHEFFECT_VERBOSE
 106     g_message("Build livepatheffect");
 107 #endif
 108     g_assert(object != NULL);
 109     g_assert(SP_IS_OBJECT(object));
 110
 111     if (((SPObjectClass *) livepatheffect_parent_class)->build)
 112         (* ((SPObjectClass *) livepatheffect_parent_class)->build)(object, document, repr);
 113
 114     sp_object_read_attr(object, "effect");
 115
 116     if (repr) {
 117         repr->addListener (&livepatheffect_repr_events, object);
 118     }
 119
 120     /* Register ourselves, is this necessary? */
 121 //    sp_document_add_resource(document, "path-effect", object);
 122 }
 123
 124 /**
 125  * Virtual release of livepatheffect members before destruction.
 126  */
 127 static void
 128 livepatheffect_release(SPObject *object)
 129 {
 130 #ifdef LIVEPATHEFFECT_VERBOSE
 131     g_print("Releasing livepatheffect");
 132 #endif
 133
 134     LivePathEffectObject *lpeobj = LIVEPATHEFFECT(object);
 135
 136     SP_OBJECT_REPR(object)->removeListenerByData(object);
 137
 138
 139 /*
 140     if (SP_OBJECT_DOCUMENT(object)) {
 141         // Unregister ourselves
 142         sp_document_remove_resource(SP_OBJECT_DOCUMENT(object), "livepatheffect", SP_OBJECT(object));
 143     }
 144
 145     if (gradient->ref) {
 146         gradient->modified_connection.disconnect();
 147         gradient->ref->detach();
 148         delete gradient->ref;
 149         gradient->ref = NULL;
 150     }
 151
 152     gradient->modified_connection.~connection();
 153
 154 */
 155
 156     if (lpeobj->lpe) {
 157         delete lpeobj->lpe;
 158         lpeobj->lpe = NULL;
 159     }
 160     lpeobj->effecttype = Inkscape::LivePathEffect::INVALID_LPE;
 161
 162     if (((SPObjectClass *) livepatheffect_parent_class)->release)
 163         ((SPObjectClass *) livepatheffect_parent_class)->release(object);
 164 }
 165
 166 /**
 167  * Virtual set: set attribute to value.
 168  */
 169 static void
 170 livepatheffect_set(SPObject *object, unsigned key, gchar const *value)
 171 {
 172     LivePathEffectObject *lpeobj = LIVEPATHEFFECT(object);
 173 #ifdef LIVEPATHEFFECT_VERBOSE
 174     g_print("Set livepatheffect");
 175 #endif
 176     switch (key) {
 177         case SP_PROP_PATH_EFFECT:
 178             if (lpeobj->lpe) {
 179                 delete lpeobj->lpe;
 180                 lpeobj->lpe = NULL;
 181             }
 182
 183             if (value) {
 184                 lpeobj->effecttype = Inkscape::LivePathEffect::LPETypeConverter.get_id_from_key(value);
 185                 if (lpeobj->effecttype != Inkscape::LivePathEffect::INVALID_LPE) {
 186                     lpeobj->lpe = Inkscape::LivePathEffect::Effect::New(lpeobj->effecttype, lpeobj);
 187                 }
 188                 lpeobj->effecttype_set = true;
 189             } else {
 190                 lpeobj->effecttype = Inkscape::LivePathEffect::INVALID_LPE;
 191                 lpeobj->effecttype_set = false;
 192             }
 193             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 194             break;
 195     }
 196
 197     if (((SPObjectClass *) livepatheffect_parent_class)->set) {
 198         ((SPObjectClass *) livepatheffect_parent_class)->set(object, key, value);
 199     }
 200 }
 201
 202 /**
 203  * Virtual write: write object attributes to repr.
 204  */
 205 static Inkscape::XML::Node *
 206 livepatheffect_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
 207 {
 208 #ifdef LIVEPATHEFFECT_VERBOSE
 209     g_print("Write livepatheffect");
 210 #endif
 211
 212     LivePathEffectObject *lpeobj = LIVEPATHEFFECT(object);
 213
 214     if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
 215         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_OBJECT_DOCUMENT(object));
 216         repr = xml_doc->createElement("inkscape:path-effect");
 217     }
 218
 219     if ((flags & SP_OBJECT_WRITE_ALL) || lpeobj->effecttype_set)
 220         repr->setAttribute("effect", Inkscape::LivePathEffect::LPETypeConverter.get_key(lpeobj->effecttype).c_str());
 221
 222 //    lpeobj->lpe->write(repr); something like this.
 223
 224     if (((SPObjectClass *) livepatheffect_parent_class)->write)
 225         (* ((SPObjectClass *) livepatheffect_parent_class)->write)(object, repr, flags);
 226
 227     return repr;
 228 }
 229
 230 static void
 231 livepatheffect_on_repr_attr_changed ( Inkscape::XML::Node * repr,
 232                                       const gchar *key,
 233                                       const gchar *oldval,
 234                                       const gchar *newval,
 235                                       bool is_interactive,
 236                                       void * data )
 237 {
 238 #ifdef LIVEPATHEFFECT_VERBOSE
 239     g_print("livepatheffect_on_repr_attr_changed");
 240 #endif
 241
 242     if (!data)
 243         return;
 244
 245     LivePathEffectObject *lpeobj = (LivePathEffectObject*) data;
 246     if (!lpeobj->lpe)
 247         return;
 248
 249     lpeobj->lpe->setParameter(key, newval);
 250
 251     lpeobj->requestModified(SP_OBJECT_MODIFIED_FLAG);
 252 }
 253
 254
 255 /*
 256   Local Variables:
 257   mode:c++
 258   c-file-style:"stroustrup"
 259   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 260   indent-tabs-mode:nil
 261   fill-column:99
 262   End:
 263 */
 264 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :