src/knotholder.cpp

   1 #define __KNOT_HOLDER_C__
   2
   3 /*
   4  * Container for SPKnot visual handles
   5  *
   6  * Authors:
   7  *   Mitsuru Oka <oka326@parkcity.ne.jp>
   8  *   bulia byak <buliabyak@users.sf.net>
   9  *
  10  * Copyright (C) 2001-2005 authors
  11  *
  12  * Released under GNU GPL, read the file 'COPYING' for more information
  13  */
  14
  15 #define noKNOT_HOLDER_DEBUG
  16
  17
  18 #include "document.h"
  19 #include "sp-shape.h"
  20 #include "knot.h"
  21 #include "knotholder.h"
  22 #include "knot-holder-entity.h"
  23 #include "rect-context.h"
  24 #include "sp-rect.h"
  25 #include "arc-context.h"
  26 #include "sp-ellipse.h"
  27 #include "star-context.h"
  28 #include "sp-star.h"
  29 #include "spiral-context.h"
  30 #include "sp-spiral.h"
  31 #include "sp-offset.h"
  32
  33 #include <libnr/nr-matrix-div.h>
  34 #include <glibmm/i18n.h>
  35
  36 class SPDesktop;
  37
  38 static void knot_clicked_handler (SPKnot *knot, guint state, gpointer data);
  39 static void knot_moved_handler(SPKnot *knot, NR::Point const *p, guint state, gpointer data);
  40 static void knot_ungrabbed_handler (SPKnot *knot, unsigned int state, SPKnotHolder *kh);
  41 static void sp_knot_holder_class_init(SPKnotHolderClass *klass);
  42
  43 void sp_knot_holder_dispose(GObject *object);
  44
  45 #ifdef KNOT_HOLDER_DEBUG
  46
  47 static void sp_knot_holder_debug(GtkObject *object, gpointer data)
  48 {
  49     g_print("sp-knot-holder-debug: [type=%s] [data=%s]\n", gtk_type_name(GTK_OBJECT_TYPE(object)), (const gchar *) data);
  50 }
  51 #endif
  52
  53 static GObjectClass *parent_class;
  54
  55 /**
  56  * Registers SPKnotHolder class and returns its type number.
  57  */
  58 GType sp_knot_holder_get_type()
  59 {
  60     static GType type = 0;
  61     if (!type) {
  62         GTypeInfo info = {
  63             sizeof(SPKnotHolderClass),
  64             NULL,       /* base_init */
  65             NULL,       /* base_finalize */
  66             (GClassInitFunc) sp_knot_holder_class_init,
  67             NULL,       /* class_finalize */
  68             NULL,       /* class_data */
  69             sizeof (SPKnotHolder),
  70             16, /* n_preallocs */
  71             NULL,
  72             NULL
  73         };
  74         type = g_type_register_static (G_TYPE_OBJECT, "SPKnotHolder", &info, (GTypeFlags) 0);
  75     }
  76     return type;
  77 }
  78
  79 /**
  80  * SPKnotHolder vtable initialization.
  81  */
  82 static void sp_knot_holder_class_init(SPKnotHolderClass *klass){
  83     parent_class = (GObjectClass*) g_type_class_peek_parent(klass);
  84     klass->dispose = sp_knot_holder_dispose;
  85 }
  86
  87 SPKnotHolder *sp_knot_holder_new(SPDesktop *desktop, SPItem *item, SPKnotHolderReleasedFunc relhandler)
  88 {
  89     Inkscape::XML::Node *repr = SP_OBJECT(item)->repr;
  90
  91     g_return_val_if_fail(desktop != NULL, NULL);
  92     g_return_val_if_fail(item != NULL, NULL);
  93     g_return_val_if_fail(SP_IS_ITEM(item), NULL);
  94
  95     SPKnotHolder *knot_holder = (SPKnotHolder*)g_object_new (SP_TYPE_KNOT_HOLDER, 0);
  96     knot_holder->desktop = desktop;
  97     knot_holder->item = item;
  98     g_object_ref(G_OBJECT(item));
  99     knot_holder->entity = NULL;
 100
 101     knot_holder->released = relhandler;
 102
 103     knot_holder->repr = repr;
 104     knot_holder->local_change = FALSE;
 105
 106 #ifdef KNOT_HOLDER_DEBUG
 107     g_signal_connect(G_OBJECT(desktop), "destroy", sp_knot_holder_debug, (gpointer) "SPKnotHolder::item");
 108 #endif
 109
 110     return knot_holder;
 111 }
 112
 113 void sp_knot_holder_dispose(GObject *object) {
 114     SPKnotHolder *kh = G_TYPE_CHECK_INSTANCE_CAST((object), SP_TYPE_KNOT_HOLDER, SPKnotHolder);
 115
 116     g_object_unref(G_OBJECT(kh->item));
 117     while (kh->entity) {
 118         SPKnotHolderEntity *e = (SPKnotHolderEntity *) kh->entity->data;
 119         g_signal_handler_disconnect(e->knot, e->_click_handler_id);
 120         g_signal_handler_disconnect(e->knot, e->_ungrab_handler_id);
 121         /* unref should call destroy */
 122         g_object_unref(e->knot);
 123         g_free(e);
 124         kh->entity = g_slist_remove(kh->entity, e);
 125     }
 126 }
 127
 128 void sp_knot_holder_destroy(SPKnotHolder *kh) {
 129     g_object_unref(kh);
 130     }
 131
 132 void sp_knot_holder_add(
 133     SPKnotHolder *knot_holder,
 134     SPKnotHolderSetFunc knot_set,
 135     SPKnotHolderGetFunc knot_get,
 136     void (* knot_click) (SPItem *item, guint state),
 137     const gchar *tip
 138     )
 139 {
 140     sp_knot_holder_add_full(knot_holder, knot_set, knot_get, knot_click, SP_KNOT_SHAPE_DIAMOND, SP_KNOT_MODE_XOR, tip);
 141 }
 142
 143 void sp_knot_holder_add_full(
 144     SPKnotHolder *knot_holder,
 145     SPKnotHolderSetFunc knot_set,
 146     SPKnotHolderGetFunc knot_get,
 147     void (* knot_click) (SPItem *item, guint state),
 148     SPKnotShapeType     shape,
 149     SPKnotModeType      mode,
 150     const gchar *tip
 151     )
 152 {
 153     g_return_if_fail(knot_holder != NULL);
 154     g_return_if_fail(knot_set != NULL);
 155     g_return_if_fail(knot_get != NULL);
 156
 157     SPItem *item = SP_ITEM(knot_holder->item);
 158
 159     /* create new SPKnotHolderEntry */
 160     SPKnotHolderEntity *e = g_new(SPKnotHolderEntity, 1);
 161     e->knot = sp_knot_new(knot_holder->desktop, tip);
 162     e->knot_set = knot_set;
 163     e->knot_get = knot_get;
 164     if (knot_click) {
 165         e->knot_click = knot_click;
 166     } else {
 167         e->knot_click = NULL;
 168     }
 169
 170     g_object_set(G_OBJECT (e->knot->item), "shape", shape, NULL);
 171     g_object_set(G_OBJECT (e->knot->item), "mode", mode, NULL);
 172
 173     // TODO: add a color argument
 174     //e->knot->fill [SP_KNOT_STATE_NORMAL] = 0x00ff0000;
 175     //g_object_set (G_OBJECT (e->knot->item), "fill_color", 0x00ff0000, NULL);
 176
 177     knot_holder->entity = g_slist_append(knot_holder->entity, e);
 178
 179     /* Move to current point. */
 180     NR::Point dp = e->knot_get(item) * sp_item_i2d_affine(item);
 181     sp_knot_set_position(e->knot, &dp, SP_KNOT_STATE_NORMAL);
 182
 183     e->handler_id = g_signal_connect(e->knot, "moved", G_CALLBACK(knot_moved_handler), knot_holder);
 184     e->_click_handler_id = g_signal_connect(e->knot, "clicked", G_CALLBACK(knot_clicked_handler), knot_holder);
 185     e->_ungrab_handler_id = g_signal_connect(e->knot, "ungrabbed", G_CALLBACK(knot_ungrabbed_handler), knot_holder);
 186
 187 #ifdef KNOT_HOLDER_DEBUG
 188     g_signal_connect(ob, "destroy", sp_knot_holder_debug, "SPKnotHolder::knot");
 189 #endif
 190     sp_knot_show(e->knot);
 191 }
 192
 193 /**
 194  * \param p In desktop coordinates.
 195  */
 196
 197 static void knotholder_update_knots(SPKnotHolder *knot_holder, SPItem *item)
 198 {
 199     NR::Matrix const i2d(sp_item_i2d_affine(item));
 200
 201     for (GSList *el = knot_holder->entity; el; el = el->next) {
 202         SPKnotHolderEntity *e = (SPKnotHolderEntity *) el->data;
 203         GObject *kob = e->knot;
 204
 205         NR::Point dp( e->knot_get(item) * i2d );
 206         g_signal_handler_block(kob, e->handler_id);
 207         sp_knot_set_position(e->knot, &dp, SP_KNOT_STATE_NORMAL);
 208         g_signal_handler_unblock(kob, e->handler_id);
 209     }
 210 }
 211
 212 static void knot_clicked_handler(SPKnot *knot, guint state, gpointer data)
 213 {
 214     SPKnotHolder *knot_holder = (SPKnotHolder *) data;
 215     SPItem *item  = SP_ITEM (knot_holder->item);
 216
 217     g_object_ref(knot_holder);
 218     for (GSList *el = knot_holder->entity; el; el = el->next) {
 219         SPKnotHolderEntity *e = (SPKnotHolderEntity *) el->data;
 220         if (e->knot == knot) {
 221             if (e->knot_click) {
 222                 e->knot_click(item, state);
 223             }
 224             break;
 225         }
 226     }
 227
 228     if (SP_IS_SHAPE(item)) {
 229         sp_shape_set_shape(SP_SHAPE(item));
 230     }
 231
 232     knotholder_update_knots(knot_holder, item);
 233     g_object_unref(knot_holder);
 234
 235     unsigned int object_verb = SP_VERB_NONE;
 236
 237     if (SP_IS_RECT(item))
 238         object_verb = SP_VERB_CONTEXT_RECT;
 239     else if (SP_IS_GENERICELLIPSE(item))
 240         object_verb = SP_VERB_CONTEXT_ARC;
 241     else if (SP_IS_STAR(item))
 242         object_verb = SP_VERB_CONTEXT_STAR;
 243     else if (SP_IS_SPIRAL(item))
 244         object_verb = SP_VERB_CONTEXT_SPIRAL;
 245     else if (SP_IS_OFFSET(item)) {
 246         if (SP_OFFSET(item)->sourceHref)
 247             object_verb = SP_VERB_SELECTION_LINKED_OFFSET;
 248         else
 249             object_verb = SP_VERB_SELECTION_DYNAMIC_OFFSET;
 250     }
 251
 252     // for drag, this is done by ungrabbed_handler, but for click we must do it here
 253     sp_document_done(SP_OBJECT_DOCUMENT(knot_holder->item), object_verb,
 254                      _("Change handle"));
 255 }
 256
 257 static void knot_moved_handler(SPKnot *knot, NR::Point const *p, guint state, gpointer data)
 258 {
 259     SPKnotHolder *knot_holder = (SPKnotHolder *) data;
 260     SPItem *item  = SP_ITEM (knot_holder->item);
 261     // this was a local change and the knotholder does not need to be recreated:
 262     knot_holder->local_change = TRUE;
 263
 264     for (GSList *el = knot_holder->entity; el; el = el->next) {
 265         SPKnotHolderEntity *e = (SPKnotHolderEntity *) el->data;
 266         if (e->knot == knot) {
 267             NR::Point const q = *p / sp_item_i2d_affine(item);
 268             e->knot_set(item, q, e->knot->drag_origin / sp_item_i2d_affine(item), state);
 269             break;
 270         }
 271     }
 272
 273     if (SP_IS_SHAPE (item)) {
 274         sp_shape_set_shape(SP_SHAPE (item));
 275     }
 276
 277     knotholder_update_knots(knot_holder, item);
 278 }
 279
 280 static void knot_ungrabbed_handler(SPKnot *knot, unsigned int state, SPKnotHolder *kh)
 281 {
 282     if (kh->released) {
 283         kh->released(kh->item);
 284     } else {
 285         SPObject *object = (SPObject *) kh->item;
 286         object->updateRepr(object->repr, SP_OBJECT_WRITE_EXT);
 287
 288         unsigned int object_verb = SP_VERB_NONE;
 289
 290         if (SP_IS_RECT(object))
 291             object_verb = SP_VERB_CONTEXT_RECT;
 292         else if (SP_IS_GENERICELLIPSE(object))
 293             object_verb = SP_VERB_CONTEXT_ARC;
 294         else if (SP_IS_STAR(object))
 295             object_verb = SP_VERB_CONTEXT_STAR;
 296         else if (SP_IS_SPIRAL(object))
 297             object_verb = SP_VERB_CONTEXT_SPIRAL;
 298         else if (SP_IS_OFFSET(object)) {
 299             if (SP_OFFSET(object)->sourceHref)
 300                 object_verb = SP_VERB_SELECTION_LINKED_OFFSET;
 301             else
 302                 object_verb = SP_VERB_SELECTION_DYNAMIC_OFFSET;
 303         }
 304
 305         sp_document_done(SP_OBJECT_DOCUMENT (object), object_verb,
 306                          _("Move handle"));
 307     }
 308 }
 309
 310 /*
 311   Local Variables:
 312   mode:c++
 313   c-file-style:"stroustrup"
 314   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 315   indent-tabs-mode:nil
 316   fill-column:99
 317   End:
 318 */
 319 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :