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