1 /** @file
2 * @brief Cartesian grid implementation
3 */
4 /* Copyright (C) Johan Engelen 2006-2007 <johan@shouraizou.nl>
5 * Copyright (C) Lauris Kaplinski 2000
6 * Abhishek Sharma
7 */
9 /* As a general comment, I am not exactly proud of how things are done.
10 * (for example the 'enable' widget and readRepr things)
11 * It does seem to work however. I intend to clean up and sort things out later, but that can take forever...
12 * Don't be shy to correct things.
13 */
15 #include "sp-canvas-group.h"
16 #include "sp-canvas-util.h"
17 #include "util/mathfns.h"
18 #include "libnr/nr-pixops.h"
19 #include "desktop-handles.h"
20 #include "helper/units.h"
21 #include "svg/svg-color.h"
22 #include "xml/node-event-vector.h"
23 #include "sp-object.h"
25 #include "sp-namedview.h"
26 #include "inkscape.h"
27 #include "desktop.h"
29 #include "../document.h"
30 #include "preferences.h"
32 #include "canvas-grid.h"
33 #include "canvas-axonomgrid.h"
35 using Inkscape::DocumentUndo;
37 namespace Inkscape {
39 static gchar const *const grid_name[] = {
40 N_("Rectangular grid"),
41 N_("Axonometric grid")
42 };
43 static gchar const *const grid_svgname[] = {
44 "xygrid",
45 "axonomgrid"
46 };
49 // ##########################################################
50 // Grid CanvasItem
51 static void grid_canvasitem_class_init (GridCanvasItemClass *klass);
52 static void grid_canvasitem_init (GridCanvasItem *grid);
53 static void grid_canvasitem_destroy (GtkObject *object);
55 static void grid_canvasitem_update (SPCanvasItem *item, Geom::Matrix const &affine, unsigned int flags);
56 static void grid_canvasitem_render (SPCanvasItem *item, SPCanvasBuf *buf);
58 static SPCanvasItemClass * parent_class;
60 GtkType
61 grid_canvasitem_get_type (void)
62 {
63 static GtkType grid_canvasitem_type = 0;
65 if (!grid_canvasitem_type) {
66 GtkTypeInfo grid_canvasitem_info = {
67 (gchar *)"GridCanvasItem",
68 sizeof (GridCanvasItem),
69 sizeof (GridCanvasItemClass),
70 (GtkClassInitFunc) grid_canvasitem_class_init,
71 (GtkObjectInitFunc) grid_canvasitem_init,
72 NULL, NULL,
73 (GtkClassInitFunc) NULL
74 };
75 grid_canvasitem_type = gtk_type_unique (sp_canvas_item_get_type (), &grid_canvasitem_info);
76 }
77 return grid_canvasitem_type;
78 }
80 static void
81 grid_canvasitem_class_init (GridCanvasItemClass *klass)
82 {
83 GtkObjectClass *object_class;
84 SPCanvasItemClass *item_class;
86 object_class = (GtkObjectClass *) klass;
87 item_class = (SPCanvasItemClass *) klass;
89 parent_class = (SPCanvasItemClass*)gtk_type_class (sp_canvas_item_get_type ());
91 object_class->destroy = grid_canvasitem_destroy;
93 item_class->update = grid_canvasitem_update;
94 item_class->render = grid_canvasitem_render;
95 }
97 static void
98 grid_canvasitem_init (GridCanvasItem *griditem)
99 {
100 griditem->grid = NULL;
101 }
103 static void
104 grid_canvasitem_destroy (GtkObject *object)
105 {
106 g_return_if_fail (object != NULL);
107 g_return_if_fail (INKSCAPE_IS_GRID_CANVASITEM (object));
109 if (GTK_OBJECT_CLASS (parent_class)->destroy)
110 (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
111 }
113 /**
114 */
115 static void
116 grid_canvasitem_render (SPCanvasItem * item, SPCanvasBuf * buf)
117 {
118 GridCanvasItem *gridcanvasitem = INKSCAPE_GRID_CANVASITEM (item);
120 if ( gridcanvasitem->grid && gridcanvasitem->grid->isVisible() ) {
121 sp_canvas_prepare_buffer (buf);
122 gridcanvasitem->grid->Render(buf);
123 }
124 }
126 static void
127 grid_canvasitem_update (SPCanvasItem *item, Geom::Matrix const &affine, unsigned int flags)
128 {
129 GridCanvasItem *gridcanvasitem = INKSCAPE_GRID_CANVASITEM (item);
131 if (parent_class->update)
132 (* parent_class->update) (item, affine, flags);
134 if (gridcanvasitem->grid) {
135 gridcanvasitem->grid->Update(affine, flags);
137 sp_canvas_request_redraw (item->canvas,
138 -1000000, -1000000,
139 1000000, 1000000);
141 item->x1 = item->y1 = -1000000;
142 item->x2 = item->y2 = 1000000;
143 }
144 }
148 // ##########################################################
149 // CanvasGrid
151 static Inkscape::XML::NodeEventVector const _repr_events = {
152 NULL, /* child_added */
153 NULL, /* child_removed */
154 CanvasGrid::on_repr_attr_changed,
155 NULL, /* content_changed */
156 NULL /* order_changed */
157 };
159 CanvasGrid::CanvasGrid(SPNamedView * nv, Inkscape::XML::Node * in_repr, SPDocument *in_doc, GridType type)
160 : visible(true), gridtype(type)
161 {
162 repr = in_repr;
163 doc = in_doc;
164 if (repr) {
165 repr->addListener (&_repr_events, this);
166 }
168 namedview = nv;
169 canvasitems = NULL;
170 }
172 CanvasGrid::~CanvasGrid()
173 {
174 if (repr) {
175 repr->removeListenerByData (this);
176 }
178 while (canvasitems) {
179 gtk_object_destroy(GTK_OBJECT(canvasitems->data));
180 canvasitems = g_slist_remove(canvasitems, canvasitems->data);
181 }
182 }
184 const char *
185 CanvasGrid::getName()
186 {
187 return _(grid_name[gridtype]);
188 }
190 const char *
191 CanvasGrid::getSVGName()
192 {
193 return grid_svgname[gridtype];
194 }
196 GridType
197 CanvasGrid::getGridType()
198 {
199 return gridtype;
200 }
203 char const *
204 CanvasGrid::getName(GridType type)
205 {
206 return _(grid_name[type]);
207 }
209 char const *
210 CanvasGrid::getSVGName(GridType type)
211 {
212 return grid_svgname[type];
213 }
215 GridType
216 CanvasGrid::getGridTypeFromSVGName(char const *typestr)
217 {
218 if (!typestr) return GRID_RECTANGULAR;
220 gint t = 0;
221 for (t = GRID_MAXTYPENR; t >= 0; t--) { //this automatically defaults to grid0 which is rectangular grid
222 if (!strcmp(typestr, grid_svgname[t])) break;
223 }
224 return (GridType) t;
225 }
227 GridType
228 CanvasGrid::getGridTypeFromName(char const *typestr)
229 {
230 if (!typestr) return GRID_RECTANGULAR;
232 gint t = 0;
233 for (t = GRID_MAXTYPENR; t >= 0; t--) { //this automatically defaults to grid0 which is rectangular grid
234 if (!strcmp(typestr, _(grid_name[t]))) break;
235 }
236 return (GridType) t;
237 }
240 /*
241 * writes an <inkscape:grid> child to repr.
242 */
243 void
244 CanvasGrid::writeNewGridToRepr(Inkscape::XML::Node * repr, SPDocument * doc, GridType gridtype)
245 {
246 if (!repr) return;
247 if (gridtype > GRID_MAXTYPENR) return;
249 // first create the child xml node, then hook it to repr. This order is important, to not set off listeners to repr before the new node is complete.
251 Inkscape::XML::Document *xml_doc = doc->getReprDoc();
252 Inkscape::XML::Node *newnode;
253 newnode = xml_doc->createElement("inkscape:grid");
254 newnode->setAttribute("type", getSVGName(gridtype));
256 repr->appendChild(newnode);
257 Inkscape::GC::release(newnode);
259 DocumentUndo::done(doc, SP_VERB_DIALOG_NAMEDVIEW, _("Create new grid"));
260 }
262 /*
263 * Creates a new CanvasGrid object of type gridtype
264 */
265 CanvasGrid*
266 CanvasGrid::NewGrid(SPNamedView * nv, Inkscape::XML::Node * repr, SPDocument * doc, GridType gridtype)
267 {
268 if (!repr) return NULL;
269 if (!doc) {
270 g_error("CanvasGrid::NewGrid - doc==NULL");
271 return NULL;
272 }
274 switch (gridtype) {
275 case GRID_RECTANGULAR:
276 return (CanvasGrid*) new CanvasXYGrid(nv, repr, doc);
277 case GRID_AXONOMETRIC:
278 return (CanvasGrid*) new CanvasAxonomGrid(nv, repr, doc);
279 }
281 return NULL;
282 }
285 /**
286 * creates a new grid canvasitem for the SPDesktop given as parameter. Keeps a link to this canvasitem in the canvasitems list.
287 */
288 GridCanvasItem *
289 CanvasGrid::createCanvasItem(SPDesktop * desktop)
290 {
291 if (!desktop) return NULL;
292 // Johan: I think for multiple desktops it is best if each has their own canvasitem,
293 // but share the same CanvasGrid object; that is what this function is for.
295 // check if there is already a canvasitem on this desktop linking to this grid
296 for (GSList *l = canvasitems; l != NULL; l = l->next) {
297 if ( sp_desktop_gridgroup(desktop) == SP_CANVAS_GROUP(SP_CANVAS_ITEM(l->data)->parent) ) {
298 return NULL;
299 }
300 }
302 GridCanvasItem * item = INKSCAPE_GRID_CANVASITEM( sp_canvas_item_new(sp_desktop_gridgroup(desktop), INKSCAPE_TYPE_GRID_CANVASITEM, NULL) );
303 item->grid = this;
304 sp_canvas_item_show(SP_CANVAS_ITEM(item));
306 gtk_object_ref(GTK_OBJECT(item)); // since we're keeping a link to this item, we need to bump up the ref count
307 canvasitems = g_slist_prepend(canvasitems, item);
309 return item;
310 }
312 Gtk::Widget *
313 CanvasGrid::newWidget()
314 {
315 Gtk::VBox * vbox = Gtk::manage( new Gtk::VBox() );
316 Gtk::Label * namelabel = Gtk::manage(new Gtk::Label("", Gtk::ALIGN_CENTER) );
318 Glib::ustring str("<b>");
319 str += getName();
320 str += "</b>";
321 namelabel->set_markup(str);
322 vbox->pack_start(*namelabel, true, true);
324 Inkscape::UI::Widget::RegisteredCheckButton * _rcb_enabled = Gtk::manage(
325 new Inkscape::UI::Widget::RegisteredCheckButton( _("_Enabled"),
326 _("Determines whether to snap to this grid or not. Can be 'on' for invisible grids."),
327 "enabled", _wr, false, repr, doc) );
329 Inkscape::UI::Widget::RegisteredCheckButton * _rcb_snap_visible_only = Gtk::manage(
330 new Inkscape::UI::Widget::RegisteredCheckButton( _("Snap to visible _grid lines only"),
331 _("When zoomed out, not all grid lines will be displayed. Only the visible ones will be snapped to"),
332 "snapvisiblegridlinesonly", _wr, true, repr, doc) );
334 Inkscape::UI::Widget::RegisteredCheckButton * _rcb_visible = Gtk::manage(
335 new Inkscape::UI::Widget::RegisteredCheckButton( _("_Visible"),
336 _("Determines whether the grid is displayed or not. Objects are still snapped to invisible grids."),
337 "visible", _wr, true, repr, doc) );
339 vbox->pack_start(*_rcb_enabled, true, true);
340 vbox->pack_start(*_rcb_visible, true, true);
341 vbox->pack_start(*_rcb_snap_visible_only, true, true);
342 Gtk::Widget * gridwdg = newSpecificWidget();
343 vbox->pack_start(*gridwdg, true, true);
345 std::list<Gtk::Widget*> slaves;
346 slaves.push_back(_rcb_visible);
347 slaves.push_back(_rcb_snap_visible_only);
348 slaves.push_back(gridwdg);
349 _rcb_enabled->setSlaveWidgets(slaves);
351 // set widget values
352 _rcb_visible->setActive(visible);
353 if (snapper != NULL) {
354 _rcb_enabled->setActive(snapper->getEnabled());
355 _rcb_snap_visible_only->setActive(snapper->getSnapVisibleOnly());
356 }
358 return dynamic_cast<Gtk::Widget *> (vbox);
359 }
361 void
362 CanvasGrid::on_repr_attr_changed(Inkscape::XML::Node *repr, gchar const *key, gchar const *oldval, gchar const *newval, bool is_interactive, void *data)
363 {
364 if (!data)
365 return;
367 ((CanvasGrid*) data)->onReprAttrChanged(repr, key, oldval, newval, is_interactive);
368 }
370 bool CanvasGrid::isEnabled()
371 {
372 if (snapper == NULL) {
373 return false;
374 }
376 return snapper->getEnabled();
377 }
379 // ##########################################################
380 // CanvasXYGrid
383 /**
384 * "attach_all" function
385 * A DIRECT COPY-PASTE FROM DOCUMENT-PROPERTIES.CPP TO QUICKLY GET RESULTS
386 *
387 * Helper function that attachs widgets in a 3xn table. The widgets come in an
388 * array that has two entries per table row. The two entries code for four
389 * possible cases: (0,0) means insert space in first column; (0, non-0) means
390 * widget in columns 2-3; (non-0, 0) means label in columns 1-3; and
391 * (non-0, non-0) means two widgets in columns 2 and 3.
392 **/
393 #define SPACE_SIZE_X 15
394 #define SPACE_SIZE_Y 10
395 static inline void
396 attach_all(Gtk::Table &table, Gtk::Widget const *const arr[], unsigned size, int start = 0)
397 {
398 for (unsigned i=0, r=start; i<size/sizeof(Gtk::Widget*); i+=2) {
399 if (arr[i] && arr[i+1]) {
400 table.attach (const_cast<Gtk::Widget&>(*arr[i]), 1, 2, r, r+1,
401 Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
402 table.attach (const_cast<Gtk::Widget&>(*arr[i+1]), 2, 3, r, r+1,
403 Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
404 } else {
405 if (arr[i+1]) {
406 table.attach (const_cast<Gtk::Widget&>(*arr[i+1]), 1, 3, r, r+1,
407 Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
408 } else if (arr[i]) {
409 Gtk::Label& label = reinterpret_cast<Gtk::Label&> (const_cast<Gtk::Widget&>(*arr[i]));
410 label.set_alignment (0.0);
411 table.attach (label, 0, 3, r, r+1,
412 Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
413 } else {
414 Gtk::HBox *space = manage (new Gtk::HBox);
415 space->set_size_request (SPACE_SIZE_X, SPACE_SIZE_Y);
416 table.attach (*space, 0, 1, r, r+1,
417 (Gtk::AttachOptions)0, (Gtk::AttachOptions)0,0,0);
418 }
419 }
420 ++r;
421 }
422 }
424 CanvasXYGrid::CanvasXYGrid (SPNamedView * nv, Inkscape::XML::Node * in_repr, SPDocument * in_doc)
425 : CanvasGrid(nv, in_repr, in_doc, GRID_RECTANGULAR)
426 {
427 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
428 gridunit = sp_unit_get_by_abbreviation( prefs->getString("/options/grids/xy/units").data() );
429 if (!gridunit)
430 gridunit = &sp_unit_get_by_id(SP_UNIT_PX);
431 origin[Geom::X] = sp_units_get_pixels(prefs->getDouble("/options/grids/xy/origin_x", 0.0), *gridunit);
432 origin[Geom::Y] = sp_units_get_pixels(prefs->getDouble("/options/grids/xy/origin_y", 0.0), *gridunit);
433 color = prefs->getInt("/options/grids/xy/color", 0x0000ff20);
434 empcolor = prefs->getInt("/options/grids/xy/empcolor", 0x0000ff40);
435 empspacing = prefs->getInt("/options/grids/xy/empspacing", 5);
436 spacing[Geom::X] = sp_units_get_pixels(prefs->getDouble("/options/grids/xy/spacing_x", 0.0), *gridunit);
437 spacing[Geom::Y] = sp_units_get_pixels(prefs->getDouble("/options/grids/xy/spacing_y", 0.0), *gridunit);
438 render_dotted = prefs->getBool("/options/grids/xy/dotted", false);
440 snapper = new CanvasXYGridSnapper(this, &namedview->snap_manager, 0);
442 if (repr) readRepr();
443 }
445 CanvasXYGrid::~CanvasXYGrid ()
446 {
447 if (snapper) delete snapper;
448 }
451 /* fixme: Collect all these length parsing methods and think common sane API */
453 static gboolean
454 sp_nv_read_length(gchar const *str, guint base, gdouble *val, SPUnit const **unit)
455 {
456 if (!str) {
457 return FALSE;
458 }
460 gchar *u;
461 gdouble v = g_ascii_strtod(str, &u);
462 if (!u) {
463 return FALSE;
464 }
465 while (isspace(*u)) {
466 u += 1;
467 }
469 if (!*u) {
470 /* No unit specified - keep default */
471 *val = v;
472 return TRUE;
473 }
475 if (base & SP_UNIT_DEVICE) {
476 if (u[0] && u[1] && !isalnum(u[2]) && !strncmp(u, "px", 2)) {
477 *unit = &sp_unit_get_by_id(SP_UNIT_PX);
478 *val = v;
479 return TRUE;
480 }
481 }
483 if (base & SP_UNIT_ABSOLUTE) {
484 if (!strncmp(u, "pt", 2)) {
485 *unit = &sp_unit_get_by_id(SP_UNIT_PT);
486 } else if (!strncmp(u, "mm", 2)) {
487 *unit = &sp_unit_get_by_id(SP_UNIT_MM);
488 } else if (!strncmp(u, "cm", 2)) {
489 *unit = &sp_unit_get_by_id(SP_UNIT_CM);
490 } else if (!strncmp(u, "m", 1)) {
491 *unit = &sp_unit_get_by_id(SP_UNIT_M);
492 } else if (!strncmp(u, "in", 2)) {
493 *unit = &sp_unit_get_by_id(SP_UNIT_IN);
494 } else {
495 return FALSE;
496 }
497 *val = v;
498 return TRUE;
499 }
501 return FALSE;
502 }
504 static gboolean sp_nv_read_opacity(gchar const *str, guint32 *color)
505 {
506 if (!str) {
507 return FALSE;
508 }
510 gchar *u;
511 gdouble v = g_ascii_strtod(str, &u);
512 if (!u) {
513 return FALSE;
514 }
515 v = CLAMP(v, 0.0, 1.0);
517 *color = (*color & 0xffffff00) | (guint32) floor(v * 255.9999);
519 return TRUE;
520 }
522 /** If the passed scalar is invalid (<=0), then set the widget and the scalar
523 to use the given old value.
525 @param oldVal Old value to use if the new one is invalid.
526 @param pTarget The scalar to validate.
527 @param widget Widget associated with the scalar.
528 */
529 static void validateScalar(double oldVal,
530 double* pTarget)
531 {
532 // Avoid nullness.
533 if ( pTarget == NULL )
534 return;
536 // Invalid new value?
537 if ( *pTarget <= 0 ) {
538 // If the old value is somehow invalid as well, then default to 1.
539 if ( oldVal <= 0 )
540 oldVal = 1;
542 // Reset the scalar and associated widget to the old value.
543 *pTarget = oldVal;
544 } //if
546 } //validateScalar
549 /** If the passed int is invalid (<=0), then set the widget and the int
550 to use the given old value.
552 @param oldVal Old value to use if the new one is invalid.
553 @param pTarget The int to validate.
554 @param widget Widget associated with the int.
555 */
556 static void validateInt(gint oldVal,
557 gint* pTarget)
558 {
559 // Avoid nullness.
560 if ( pTarget == NULL )
561 return;
563 // Invalid new value?
564 if ( *pTarget <= 0 ) {
565 // If the old value is somehow invalid as well, then default to 1.
566 if ( oldVal <= 0 )
567 oldVal = 1;
569 // Reset the int and associated widget to the old value.
570 *pTarget = oldVal;
571 } //if
573 } //validateInt
575 void
576 CanvasXYGrid::readRepr()
577 {
578 gchar const *value;
579 if ( (value = repr->attribute("originx")) ) {
580 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &origin[Geom::X], &gridunit);
581 origin[Geom::X] = sp_units_get_pixels(origin[Geom::X], *(gridunit));
582 }
584 if ( (value = repr->attribute("originy")) ) {
585 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &origin[Geom::Y], &gridunit);
586 origin[Geom::Y] = sp_units_get_pixels(origin[Geom::Y], *(gridunit));
587 }
589 if ( (value = repr->attribute("spacingx")) ) {
590 double oldVal = spacing[Geom::X];
591 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &spacing[Geom::X], &gridunit);
592 validateScalar( oldVal, &spacing[Geom::X]);
593 spacing[Geom::X] = sp_units_get_pixels(spacing[Geom::X], *(gridunit));
595 }
596 if ( (value = repr->attribute("spacingy")) ) {
597 double oldVal = spacing[Geom::Y];
598 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &spacing[Geom::Y], &gridunit);
599 validateScalar( oldVal, &spacing[Geom::Y]);
600 spacing[Geom::Y] = sp_units_get_pixels(spacing[Geom::Y], *(gridunit));
602 }
604 if ( (value = repr->attribute("color")) ) {
605 color = (color & 0xff) | sp_svg_read_color(value, color);
606 }
608 if ( (value = repr->attribute("empcolor")) ) {
609 empcolor = (empcolor & 0xff) | sp_svg_read_color(value, empcolor);
610 }
612 if ( (value = repr->attribute("opacity")) ) {
613 sp_nv_read_opacity(value, &color);
614 }
615 if ( (value = repr->attribute("empopacity")) ) {
616 sp_nv_read_opacity(value, &empcolor);
617 }
619 if ( (value = repr->attribute("empspacing")) ) {
620 gint oldVal = empspacing;
621 empspacing = atoi(value);
622 validateInt( oldVal, &empspacing);
623 }
625 if ( (value = repr->attribute("dotted")) ) {
626 render_dotted = (strcmp(value,"false") != 0 && strcmp(value, "0") != 0);
627 }
629 if ( (value = repr->attribute("visible")) ) {
630 visible = (strcmp(value,"false") != 0 && strcmp(value, "0") != 0);
631 }
633 if ( (value = repr->attribute("enabled")) ) {
634 g_assert(snapper != NULL);
635 snapper->setEnabled(strcmp(value,"false") != 0 && strcmp(value, "0") != 0);
636 }
638 if ( (value = repr->attribute("snapvisiblegridlinesonly")) ) {
639 g_assert(snapper != NULL);
640 snapper->setSnapVisibleOnly(strcmp(value,"false") != 0 && strcmp(value, "0") != 0);
641 }
643 for (GSList *l = canvasitems; l != NULL; l = l->next) {
644 sp_canvas_item_request_update ( SP_CANVAS_ITEM(l->data) );
645 }
647 return;
648 }
650 /**
651 * Called when XML node attribute changed; updates dialog widgets if change was not done by widgets themselves.
652 */
653 void
654 CanvasXYGrid::onReprAttrChanged(Inkscape::XML::Node */*repr*/, gchar const */*key*/, gchar const */*oldval*/, gchar const */*newval*/, bool /*is_interactive*/)
655 {
656 readRepr();
658 if ( ! (_wr.isUpdating()) )
659 updateWidgets();
660 }
665 Gtk::Widget *
666 CanvasXYGrid::newSpecificWidget()
667 {
668 Gtk::Table * table = Gtk::manage( new Gtk::Table(1,1) );
670 Inkscape::UI::Widget::RegisteredUnitMenu *_rumg = Gtk::manage( new Inkscape::UI::Widget::RegisteredUnitMenu(
671 _("Grid _units:"), "units", _wr, repr, doc) );
672 Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_ox = Gtk::manage( new Inkscape::UI::Widget::RegisteredScalarUnit(
673 _("_Origin X:"), _("X coordinate of grid origin"), "originx", *_rumg, _wr, repr, doc) );
674 Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_oy = Gtk::manage( new Inkscape::UI::Widget::RegisteredScalarUnit(
675 _("O_rigin Y:"), _("Y coordinate of grid origin"), "originy", *_rumg, _wr, repr, doc) );
676 Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_sx = Gtk::manage( new Inkscape::UI::Widget::RegisteredScalarUnit(
677 _("Spacing _X:"), _("Distance between vertical grid lines"), "spacingx", *_rumg, _wr, repr, doc) );
678 Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_sy = Gtk::manage( new Inkscape::UI::Widget::RegisteredScalarUnit(
679 _("Spacing _Y:"), _("Distance between horizontal grid lines"), "spacingy", *_rumg, _wr, repr, doc) );
681 Inkscape::UI::Widget::RegisteredColorPicker *_rcp_gcol = Gtk::manage(
682 new Inkscape::UI::Widget::RegisteredColorPicker(
683 _("Grid line _color:"), _("Grid line color"), _("Color of grid lines"),
684 "color", "opacity", _wr, repr, doc));
686 Inkscape::UI::Widget::RegisteredColorPicker *_rcp_gmcol = Gtk::manage(
687 new Inkscape::UI::Widget::RegisteredColorPicker(
688 _("Ma_jor grid line color:"), _("Major grid line color"),
689 _("Color of the major (highlighted) grid lines"), "empcolor", "empopacity",
690 _wr, repr, doc));
692 Inkscape::UI::Widget::RegisteredSuffixedInteger *_rsi = Gtk::manage( new Inkscape::UI::Widget::RegisteredSuffixedInteger(
693 _("_Major grid line every:"), "", _("lines"), "empspacing", _wr, repr, doc) );
695 table->set_spacings(2);
697 _wr.setUpdating (true);
699 _rsu_ox->setDigits(4);
700 _rsu_ox->setIncrements(0.1, 1.0);
702 _rsu_oy->setDigits(4);
703 _rsu_oy->setIncrements(0.1, 1.0);
705 _rsu_sx->setDigits(4);
706 _rsu_sx->setIncrements(0.1, 1.0);
708 _rsu_sy->setDigits(4);
709 _rsu_sy->setIncrements(0.1, 1.0);
711 Inkscape::UI::Widget::RegisteredCheckButton * _rcb_dotted = Gtk::manage(
712 new Inkscape::UI::Widget::RegisteredCheckButton( _("_Show dots instead of lines"),
713 _("If set, displays dots at gridpoints instead of gridlines"),
714 "dotted", _wr, false, repr, doc) );
715 _wr.setUpdating (false);
717 Gtk::Widget const *const widget_array[] = {
718 0, _rumg,
719 0, _rsu_ox,
720 0, _rsu_oy,
721 0, _rsu_sx,
722 0, _rsu_sy,
723 _rcp_gcol->_label, _rcp_gcol,
724 0, 0,
725 _rcp_gmcol->_label, _rcp_gmcol,
726 0, _rsi,
727 0, _rcb_dotted,
728 };
730 attach_all (*table, widget_array, sizeof(widget_array));
732 // set widget values
733 _rumg->setUnit (gridunit);
735 gdouble val;
736 val = origin[Geom::X];
737 val = sp_pixels_get_units (val, *(gridunit));
738 _rsu_ox->setValue (val);
739 val = origin[Geom::Y];
740 val = sp_pixels_get_units (val, *(gridunit));
741 _rsu_oy->setValue (val);
742 val = spacing[Geom::X];
743 double gridx = sp_pixels_get_units (val, *(gridunit));
744 _rsu_sx->setValue (gridx);
745 val = spacing[Geom::Y];
746 double gridy = sp_pixels_get_units (val, *(gridunit));
747 _rsu_sy->setValue (gridy);
749 _rcp_gcol->setRgba32 (color);
750 _rcp_gmcol->setRgba32 (empcolor);
751 _rsi->setValue (empspacing);
753 _rcb_dotted->setActive(render_dotted);
755 return table;
756 }
759 /**
760 * Update dialog widgets from object's values.
761 */
762 void
763 CanvasXYGrid::updateWidgets()
764 {
765 /*
766 if (_wr.isUpdating()) return;
768 _wr.setUpdating (true);
770 _rcb_visible.setActive(visible);
771 if (snapper != NULL) {
772 _rcb_enabled.setActive(snapper->getEnabled());
773 }
775 _rumg.setUnit (gridunit);
777 gdouble val;
778 val = origin[Geom::X];
779 val = sp_pixels_get_units (val, *(gridunit));
780 _rsu_ox.setValue (val);
781 val = origin[Geom::Y];
782 val = sp_pixels_get_units (val, *(gridunit));
783 _rsu_oy.setValue (val);
784 val = spacing[Geom::X];
785 double gridx = sp_pixels_get_units (val, *(gridunit));
786 _rsu_sx.setValue (gridx);
787 val = spacing[Geom::Y];
788 double gridy = sp_pixels_get_units (val, *(gridunit));
789 _rsu_sy.setValue (gridy);
791 _rcp_gcol.setRgba32 (color);
792 _rcp_gmcol.setRgba32 (empcolor);
793 _rsi.setValue (empspacing);
795 _rcb_dotted.setActive(render_dotted);
797 _wr.setUpdating (false);
799 return;
800 */
801 }
805 void
806 CanvasXYGrid::Update (Geom::Matrix const &affine, unsigned int /*flags*/)
807 {
808 ow = origin * affine;
809 sw = spacing * affine;
810 sw -= Geom::Point(affine[4], affine[5]);
812 for(int dim = 0; dim < 2; dim++) {
813 gint scaling_factor = empspacing;
815 if (scaling_factor <= 1)
816 scaling_factor = 5;
818 scaled[dim] = FALSE;
819 sw[dim] = fabs (sw[dim]);
820 while (sw[dim] < 8.0) {
821 scaled[dim] = TRUE;
822 sw[dim] *= scaling_factor;
823 /* First pass, go up to the major line spacing, then
824 keep increasing by two. */
825 scaling_factor = 2;
826 }
827 }
828 }
831 static void
832 grid_hline (SPCanvasBuf *buf, gint y, gint xs, gint xe, guint32 rgba)
833 {
834 if ((y >= buf->rect.y0) && (y < buf->rect.y1)) {
835 guint r, g, b, a;
836 gint x0, x1, x;
837 guchar *p;
838 r = NR_RGBA32_R (rgba);
839 g = NR_RGBA32_G (rgba);
840 b = NR_RGBA32_B (rgba);
841 a = NR_RGBA32_A (rgba);
842 x0 = MAX (buf->rect.x0, xs);
843 x1 = MIN (buf->rect.x1, xe + 1);
844 p = buf->buf + (y - buf->rect.y0) * buf->buf_rowstride + (x0 - buf->rect.x0) * 4;
845 for (x = x0; x < x1; x++) {
846 p[0] = NR_COMPOSEN11_1111 (r, a, p[0]);
847 p[1] = NR_COMPOSEN11_1111 (g, a, p[1]);
848 p[2] = NR_COMPOSEN11_1111 (b, a, p[2]);
849 p += 4;
850 }
851 }
852 }
854 static void
855 grid_vline (SPCanvasBuf *buf, gint x, gint ys, gint ye, guint32 rgba)
856 {
857 if ((x >= buf->rect.x0) && (x < buf->rect.x1)) {
858 guint r, g, b, a;
859 gint y0, y1, y;
860 guchar *p;
861 r = NR_RGBA32_R(rgba);
862 g = NR_RGBA32_G (rgba);
863 b = NR_RGBA32_B (rgba);
864 a = NR_RGBA32_A (rgba);
865 y0 = MAX (buf->rect.y0, ys);
866 y1 = MIN (buf->rect.y1, ye + 1);
867 p = buf->buf + (y0 - buf->rect.y0) * buf->buf_rowstride + (x - buf->rect.x0) * 4;
868 for (y = y0; y < y1; y++) {
869 p[0] = NR_COMPOSEN11_1111 (r, a, p[0]);
870 p[1] = NR_COMPOSEN11_1111 (g, a, p[1]);
871 p[2] = NR_COMPOSEN11_1111 (b, a, p[2]);
872 p += buf->buf_rowstride;
873 }
874 }
875 }
877 static void
878 grid_dot (SPCanvasBuf *buf, gint x, gint y, guint32 rgba)
879 {
880 if ( (y >= buf->rect.y0) && (y < buf->rect.y1)
881 && (x >= buf->rect.x0) && (x < buf->rect.x1) ) {
882 guint r, g, b, a;
883 guchar *p;
884 r = NR_RGBA32_R (rgba);
885 g = NR_RGBA32_G (rgba);
886 b = NR_RGBA32_B (rgba);
887 a = NR_RGBA32_A (rgba);
888 p = buf->buf + (y - buf->rect.y0) * buf->buf_rowstride + (x - buf->rect.x0) * 4;
889 p[0] = NR_COMPOSEN11_1111 (r, a, p[0]);
890 p[1] = NR_COMPOSEN11_1111 (g, a, p[1]);
891 p[2] = NR_COMPOSEN11_1111 (b, a, p[2]);
892 }
893 }
895 void
896 CanvasXYGrid::Render (SPCanvasBuf *buf)
897 {
898 gdouble const sxg = floor ((buf->rect.x0 - ow[Geom::X]) / sw[Geom::X]) * sw[Geom::X] + ow[Geom::X];
899 gint const xlinestart = (gint) Inkscape::round((sxg - ow[Geom::X]) / sw[Geom::X]);
900 gdouble const syg = floor ((buf->rect.y0 - ow[Geom::Y]) / sw[Geom::Y]) * sw[Geom::Y] + ow[Geom::Y];
901 gint const ylinestart = (gint) Inkscape::round((syg - ow[Geom::Y]) / sw[Geom::Y]);
903 //set correct coloring, depending preference (when zoomed out, always major coloring or minor coloring)
904 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
905 guint32 _empcolor;
906 bool no_emp_when_zoomed_out = prefs->getBool("/options/grids/no_emphasize_when_zoomedout", false);
907 if( (scaled[Geom::X] || scaled[Geom::Y]) && no_emp_when_zoomed_out ) {
908 _empcolor = color;
909 } else {
910 _empcolor = empcolor;
911 }
913 if (!render_dotted) {
914 gint ylinenum;
915 gdouble y;
916 for (y = syg, ylinenum = ylinestart; y < buf->rect.y1; y += sw[Geom::Y], ylinenum++) {
917 gint const y0 = (gint) Inkscape::round(y);
918 if (!scaled[Geom::Y] && (ylinenum % empspacing) != 0) {
919 grid_hline (buf, y0, buf->rect.x0, buf->rect.x1 - 1, color);
920 } else {
921 grid_hline (buf, y0, buf->rect.x0, buf->rect.x1 - 1, _empcolor);
922 }
923 }
925 gint xlinenum;
926 gdouble x;
927 for (x = sxg, xlinenum = xlinestart; x < buf->rect.x1; x += sw[Geom::X], xlinenum++) {
928 gint const ix = (gint) Inkscape::round(x);
929 if (!scaled[Geom::X] && (xlinenum % empspacing) != 0) {
930 grid_vline (buf, ix, buf->rect.y0, buf->rect.y1, color);
931 } else {
932 grid_vline (buf, ix, buf->rect.y0, buf->rect.y1, _empcolor);
933 }
934 }
935 } else {
936 gint ylinenum;
937 gdouble y;
938 for (y = syg, ylinenum = ylinestart; y < buf->rect.y1; y += sw[Geom::Y], ylinenum++) {
939 gint const iy = (gint) Inkscape::round(y);
941 gint xlinenum;
942 gdouble x;
943 for (x = sxg, xlinenum = xlinestart; x < buf->rect.x1; x += sw[Geom::X], xlinenum++) {
944 gint const ix = (gint) Inkscape::round(x);
945 if ( (!scaled[Geom::X] && (xlinenum % empspacing) != 0)
946 || (!scaled[Geom::Y] && (ylinenum % empspacing) != 0)
947 || ((scaled[Geom::X] || scaled[Geom::Y]) && no_emp_when_zoomed_out) )
948 {
949 grid_dot (buf, ix, iy, color | (guint32)0x000000FF); // put alpha to max value
950 } else {
951 gint const pitch = 1;
952 grid_dot (buf, ix-pitch, iy, _empcolor);
953 grid_dot (buf, ix+pitch, iy, _empcolor);
955 grid_dot (buf, ix, iy, _empcolor | (guint32)0x000000FF); // put alpha to max value
957 grid_dot (buf, ix, iy-pitch, _empcolor);
958 grid_dot (buf, ix, iy+pitch, _empcolor);
959 }
960 }
962 }
963 }
964 }
966 CanvasXYGridSnapper::CanvasXYGridSnapper(CanvasXYGrid *grid, SnapManager *sm, Geom::Coord const d) : LineSnapper(sm, d)
967 {
968 this->grid = grid;
969 }
971 /**
972 * \return Snap tolerance (desktop coordinates); depends on current zoom so that it's always the same in screen pixels
973 */
974 Geom::Coord CanvasXYGridSnapper::getSnapperTolerance() const
975 {
976 SPDesktop const *dt = _snapmanager->getDesktop();
977 double const zoom = dt ? dt->current_zoom() : 1;
978 return _snapmanager->snapprefs.getGridTolerance() / zoom;
979 }
981 bool CanvasXYGridSnapper::getSnapperAlwaysSnap() const
982 {
983 return _snapmanager->snapprefs.getGridTolerance() == 10000; //TODO: Replace this threshold of 10000 by a constant; see also tolerance-slider.cpp
984 }
986 LineSnapper::LineList
987 CanvasXYGridSnapper::_getSnapLines(Geom::Point const &p) const
988 {
989 LineList s;
991 if ( grid == NULL ) {
992 return s;
993 }
995 for (unsigned int i = 0; i < 2; ++i) {
997 double spacing;
999 if (getSnapVisibleOnly()) {
1000 // Only snapping to visible grid lines
1001 spacing = grid->sw[i]; // this is the spacing of the visible grid lines measured in screen pixels
1002 // convert screen pixels to px
1003 // FIXME: after we switch to snapping dist in screen pixels, this will be unnecessary
1004 SPDesktop const *dt = _snapmanager->getDesktop();
1005 if (dt) {
1006 spacing /= dt->current_zoom();
1007 }
1008 } else {
1009 // Snapping to any grid line, whether it's visible or not
1010 spacing = grid->spacing[i];
1011 }
1013 Geom::Coord rounded;
1014 Geom::Point point_on_line;
1016 rounded = Inkscape::Util::round_to_upper_multiple_plus(p[i], spacing, grid->origin[i]);
1017 point_on_line = i ? Geom::Point(0, rounded) : Geom::Point(rounded, 0);
1018 s.push_back(std::make_pair(component_vectors[i], point_on_line));
1020 rounded = Inkscape::Util::round_to_lower_multiple_plus(p[i], spacing, grid->origin[i]);
1021 point_on_line = i ? Geom::Point(0, rounded) : Geom::Point(rounded, 0);
1022 s.push_back(std::make_pair(component_vectors[i], point_on_line));
1023 }
1025 return s;
1026 }
1028 void CanvasXYGridSnapper::_addSnappedLine(SnappedConstraints &sc, Geom::Point const snapped_point, Geom::Coord const snapped_distance, SnapSourceType const &source, long source_num, Geom::Point const normal_to_line, Geom::Point const point_on_line) const
1029 {
1030 SnappedLine dummy = SnappedLine(snapped_point, snapped_distance, source, source_num, Inkscape::SNAPTARGET_GRID, getSnapperTolerance(), getSnapperAlwaysSnap(), normal_to_line, point_on_line);
1031 sc.grid_lines.push_back(dummy);
1032 }
1034 void CanvasXYGridSnapper::_addSnappedPoint(SnappedConstraints &sc, Geom::Point const snapped_point, Geom::Coord const snapped_distance, SnapSourceType const &source, long source_num, bool constrained_snap) const
1035 {
1036 SnappedPoint dummy = SnappedPoint(snapped_point, source, source_num, Inkscape::SNAPTARGET_GRID, snapped_distance, getSnapperTolerance(), getSnapperAlwaysSnap(), constrained_snap, true);
1037 sc.points.push_back(dummy);
1038 }
1040 /**
1041 * \return true if this Snapper will snap at least one kind of point.
1042 */
1043 bool CanvasXYGridSnapper::ThisSnapperMightSnap() const
1044 {
1045 return _snap_enabled && _snapmanager->snapprefs.getSnapToGrids() && _snapmanager->snapprefs.getSnapModeBBoxOrNodes();
1046 }
1048 } // namespace Inkscape
1051 /*
1052 Local Variables:
1053 mode:c++
1054 c-file-style:"stroustrup"
1055 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1056 indent-tabs-mode:nil
1057 fill-column:99
1058 End:
1059 */
1060 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :