f36d8dc5a994cfc7975a1d65f00aa0bcf213f577
1 #define INKSCAPE_CANVAS_GRID_C
3 /*
4 *
5 * Copyright (C) Johan Engelen 2006-2007 <johan@shouraizou.nl>
6 * Copyright (C) Lauris Kaplinski 2000
7 *
8 */
10 /* As a general comment, I am not exactly proud of how things are done.
11 * (for example the 'enable' widget and readRepr things)
12 * It does seem to work however. I intend to clean up and sort things out later, but that can take forever...
13 * Don't be shy to correct things.
14 */
17 #include "sp-canvas-util.h"
18 #include "util/mathfns.h"
19 #include "display-forward.h"
20 #include <libnr/nr-pixops.h>
21 #include "desktop-handles.h"
22 #include "helper/units.h"
23 #include "svg/svg-color.h"
24 #include "xml/node-event-vector.h"
25 #include "sp-object.h"
27 #include "sp-namedview.h"
28 #include "inkscape.h"
29 #include "desktop.h"
31 #include "../document.h"
32 #include "prefs-utils.h"
34 #include "canvas-grid.h"
35 #include "canvas-axonomgrid.h"
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, NR::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 "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, NR::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 = sp_document_repr_doc(doc);
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 sp_document_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_visible = 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) );
328 Inkscape::UI::Widget::RegisteredCheckButton * _rcb_enabled = Gtk::manage(
329 new Inkscape::UI::Widget::RegisteredCheckButton( _("_Visible"),
330 _("Determines whether the grid is displayed or not. Objects are still snapped to invisible grids."),
331 "visible", _wr, true, repr, doc) );
333 vbox->pack_start(*_rcb_enabled, true, true);
334 vbox->pack_start(*_rcb_visible, true, true);
335 vbox->pack_start(*newSpecificWidget(), true, true);
337 // set widget values
338 _rcb_visible->setActive(visible);
339 if (snapper != NULL) {
340 _rcb_enabled->setActive(snapper->getEnabled());
341 }
343 return dynamic_cast<Gtk::Widget *> (vbox);
344 }
346 void
347 CanvasGrid::on_repr_attr_changed(Inkscape::XML::Node *repr, gchar const *key, gchar const *oldval, gchar const *newval, bool is_interactive, void *data)
348 {
349 if (!data)
350 return;
352 ((CanvasGrid*) data)->onReprAttrChanged(repr, key, oldval, newval, is_interactive);
353 }
355 bool CanvasGrid::isEnabled()
356 {
357 if (snapper == NULL) {
358 return false;
359 }
361 return snapper->getEnabled();
362 }
364 // ##########################################################
365 // CanvasXYGrid
368 /**
369 * "attach_all" function
370 * A DIRECT COPY-PASTE FROM DOCUMENT-PROPERTIES.CPP TO QUICKLY GET RESULTS
371 *
372 * Helper function that attachs widgets in a 3xn table. The widgets come in an
373 * array that has two entries per table row. The two entries code for four
374 * possible cases: (0,0) means insert space in first column; (0, non-0) means
375 * widget in columns 2-3; (non-0, 0) means label in columns 1-3; and
376 * (non-0, non-0) means two widgets in columns 2 and 3.
377 **/
378 #define SPACE_SIZE_X 15
379 #define SPACE_SIZE_Y 10
380 static inline void
381 attach_all(Gtk::Table &table, Gtk::Widget const *const arr[], unsigned size, int start = 0)
382 {
383 for (unsigned i=0, r=start; i<size/sizeof(Gtk::Widget*); i+=2) {
384 if (arr[i] && arr[i+1]) {
385 table.attach (const_cast<Gtk::Widget&>(*arr[i]), 1, 2, r, r+1,
386 Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
387 table.attach (const_cast<Gtk::Widget&>(*arr[i+1]), 2, 3, r, r+1,
388 Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
389 } else {
390 if (arr[i+1]) {
391 table.attach (const_cast<Gtk::Widget&>(*arr[i+1]), 1, 3, r, r+1,
392 Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
393 } else if (arr[i]) {
394 Gtk::Label& label = reinterpret_cast<Gtk::Label&> (const_cast<Gtk::Widget&>(*arr[i]));
395 label.set_alignment (0.0);
396 table.attach (label, 0, 3, r, r+1,
397 Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
398 } else {
399 Gtk::HBox *space = manage (new Gtk::HBox);
400 space->set_size_request (SPACE_SIZE_X, SPACE_SIZE_Y);
401 table.attach (*space, 0, 1, r, r+1,
402 (Gtk::AttachOptions)0, (Gtk::AttachOptions)0,0,0);
403 }
404 }
405 ++r;
406 }
407 }
409 CanvasXYGrid::CanvasXYGrid (SPNamedView * nv, Inkscape::XML::Node * in_repr, SPDocument * in_doc)
410 : CanvasGrid(nv, in_repr, in_doc, GRID_RECTANGULAR)
411 {
412 gridunit = sp_unit_get_by_abbreviation( prefs_get_string_attribute("options.grids.xy", "units") );
413 if (!gridunit)
414 gridunit = &sp_unit_get_by_id(SP_UNIT_PX);
415 origin[NR::X] = sp_units_get_pixels( prefs_get_double_attribute ("options.grids.xy", "origin_x", 0.0), *(gridunit) );
416 origin[NR::Y] = sp_units_get_pixels( prefs_get_double_attribute ("options.grids.xy", "origin_y", 0.0), *(gridunit) );
417 color = prefs_get_int_attribute("options.grids.xy", "color", 0x0000ff20);
418 empcolor = prefs_get_int_attribute("options.grids.xy", "empcolor", 0x0000ff40);
419 empspacing = prefs_get_int_attribute("options.grids.xy", "empspacing", 5);
420 spacing[NR::X] = sp_units_get_pixels( prefs_get_double_attribute ("options.grids.xy", "spacing_x", 0.0), *(gridunit) );
421 spacing[NR::Y] = sp_units_get_pixels( prefs_get_double_attribute ("options.grids.xy", "spacing_y", 0.0), *(gridunit) );
422 render_dotted = prefs_get_int_attribute ("options.grids.xy", "dotted", 0) == 1;
424 snapper = new CanvasXYGridSnapper(this, namedview, 0);
425 }
427 CanvasXYGrid::~CanvasXYGrid ()
428 {
429 if (snapper) delete snapper;
430 }
433 /* fixme: Collect all these length parsing methods and think common sane API */
435 static gboolean
436 sp_nv_read_length(gchar const *str, guint base, gdouble *val, SPUnit const **unit)
437 {
438 if (!str) {
439 return FALSE;
440 }
442 gchar *u;
443 gdouble v = g_ascii_strtod(str, &u);
444 if (!u) {
445 return FALSE;
446 }
447 while (isspace(*u)) {
448 u += 1;
449 }
451 if (!*u) {
452 /* No unit specified - keep default */
453 *val = v;
454 return TRUE;
455 }
457 if (base & SP_UNIT_DEVICE) {
458 if (u[0] && u[1] && !isalnum(u[2]) && !strncmp(u, "px", 2)) {
459 *unit = &sp_unit_get_by_id(SP_UNIT_PX);
460 *val = v;
461 return TRUE;
462 }
463 }
465 if (base & SP_UNIT_ABSOLUTE) {
466 if (!strncmp(u, "pt", 2)) {
467 *unit = &sp_unit_get_by_id(SP_UNIT_PT);
468 } else if (!strncmp(u, "mm", 2)) {
469 *unit = &sp_unit_get_by_id(SP_UNIT_MM);
470 } else if (!strncmp(u, "cm", 2)) {
471 *unit = &sp_unit_get_by_id(SP_UNIT_CM);
472 } else if (!strncmp(u, "m", 1)) {
473 *unit = &sp_unit_get_by_id(SP_UNIT_M);
474 } else if (!strncmp(u, "in", 2)) {
475 *unit = &sp_unit_get_by_id(SP_UNIT_IN);
476 } else {
477 return FALSE;
478 }
479 *val = v;
480 return TRUE;
481 }
483 return FALSE;
484 }
486 static gboolean sp_nv_read_opacity(gchar const *str, guint32 *color)
487 {
488 if (!str) {
489 return FALSE;
490 }
492 gchar *u;
493 gdouble v = g_ascii_strtod(str, &u);
494 if (!u) {
495 return FALSE;
496 }
497 v = CLAMP(v, 0.0, 1.0);
499 *color = (*color & 0xffffff00) | (guint32) floor(v * 255.9999);
501 return TRUE;
502 }
504 /** If the passed scalar is invalid (<=0), then set the widget and the scalar
505 to use the given old value.
507 @param oldVal Old value to use if the new one is invalid.
508 @param pTarget The scalar to validate.
509 @param widget Widget associated with the scalar.
510 */
511 static void validateScalar(double oldVal,
512 double* pTarget)
513 {
514 // Avoid nullness.
515 if ( pTarget == NULL )
516 return;
518 // Invalid new value?
519 if ( *pTarget <= 0 ) {
520 // If the old value is somehow invalid as well, then default to 1.
521 if ( oldVal <= 0 )
522 oldVal = 1;
524 // Reset the scalar and associated widget to the old value.
525 *pTarget = oldVal;
526 } //if
528 } //validateScalar
531 /** If the passed int is invalid (<=0), then set the widget and the int
532 to use the given old value.
534 @param oldVal Old value to use if the new one is invalid.
535 @param pTarget The int to validate.
536 @param widget Widget associated with the int.
537 */
538 static void validateInt(gint oldVal,
539 gint* pTarget)
540 {
541 // Avoid nullness.
542 if ( pTarget == NULL )
543 return;
545 // Invalid new value?
546 if ( *pTarget <= 0 ) {
547 // If the old value is somehow invalid as well, then default to 1.
548 if ( oldVal <= 0 )
549 oldVal = 1;
551 // Reset the int and associated widget to the old value.
552 *pTarget = oldVal;
553 } //if
555 } //validateInt
557 void
558 CanvasXYGrid::readRepr()
559 {
560 gchar const *value;
561 if ( (value = repr->attribute("originx")) ) {
562 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &origin[NR::X], &gridunit);
563 origin[NR::X] = sp_units_get_pixels(origin[NR::X], *(gridunit));
564 }
566 if ( (value = repr->attribute("originy")) ) {
567 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &origin[NR::Y], &gridunit);
568 origin[NR::Y] = sp_units_get_pixels(origin[NR::Y], *(gridunit));
569 }
571 if ( (value = repr->attribute("spacingx")) ) {
572 double oldVal = spacing[NR::X];
573 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &spacing[NR::X], &gridunit);
574 validateScalar( oldVal, &spacing[NR::X]);
575 spacing[NR::X] = sp_units_get_pixels(spacing[NR::X], *(gridunit));
577 }
578 if ( (value = repr->attribute("spacingy")) ) {
579 double oldVal = spacing[NR::Y];
580 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &spacing[NR::Y], &gridunit);
581 validateScalar( oldVal, &spacing[NR::Y]);
582 spacing[NR::Y] = sp_units_get_pixels(spacing[NR::Y], *(gridunit));
584 }
586 if ( (value = repr->attribute("color")) ) {
587 color = (color & 0xff) | sp_svg_read_color(value, color);
588 }
590 if ( (value = repr->attribute("empcolor")) ) {
591 empcolor = (empcolor & 0xff) | sp_svg_read_color(value, empcolor);
592 }
594 if ( (value = repr->attribute("opacity")) ) {
595 sp_nv_read_opacity(value, &color);
596 }
597 if ( (value = repr->attribute("empopacity")) ) {
598 sp_nv_read_opacity(value, &empcolor);
599 }
601 if ( (value = repr->attribute("empspacing")) ) {
602 gint oldVal = empspacing;
603 empspacing = atoi(value);
604 validateInt( oldVal, &empspacing);
605 }
607 if ( (value = repr->attribute("dotted")) ) {
608 render_dotted = (strcmp(value,"true") == 0);
609 }
611 if ( (value = repr->attribute("visible")) ) {
612 visible = (strcmp(value,"true") == 0);
613 }
615 if ( (value = repr->attribute("enabled")) ) {
616 g_assert(snapper != NULL);
617 snapper->setEnabled(strcmp(value,"true") == 0);
618 }
620 for (GSList *l = canvasitems; l != NULL; l = l->next) {
621 sp_canvas_item_request_update ( SP_CANVAS_ITEM(l->data) );
622 }
624 return;
625 }
627 /**
628 * Called when XML node attribute changed; updates dialog widgets if change was not done by widgets themselves.
629 */
630 void
631 CanvasXYGrid::onReprAttrChanged(Inkscape::XML::Node */*repr*/, gchar const */*key*/, gchar const */*oldval*/, gchar const */*newval*/, bool /*is_interactive*/)
632 {
633 readRepr();
635 if ( ! (_wr.isUpdating()) )
636 updateWidgets();
637 }
642 Gtk::Widget *
643 CanvasXYGrid::newSpecificWidget()
644 {
645 Gtk::Table * table = Gtk::manage( new Gtk::Table(1,1) );
647 Inkscape::UI::Widget::RegisteredUnitMenu *_rumg = new Inkscape::UI::Widget::RegisteredUnitMenu();
648 Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_ox = new Inkscape::UI::Widget::RegisteredScalarUnit();
649 Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_oy = new Inkscape::UI::Widget::RegisteredScalarUnit();
650 Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_sx = new Inkscape::UI::Widget::RegisteredScalarUnit();
651 Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_sy = new Inkscape::UI::Widget::RegisteredScalarUnit();
652 Inkscape::UI::Widget::RegisteredColorPicker *_rcp_gcol = new Inkscape::UI::Widget::RegisteredColorPicker();
653 Inkscape::UI::Widget::RegisteredColorPicker *_rcp_gmcol = new Inkscape::UI::Widget::RegisteredColorPicker();
654 Inkscape::UI::Widget::RegisteredSuffixedInteger *_rsi = new Inkscape::UI::Widget::RegisteredSuffixedInteger();
656 // initialize widgets:
657 table->set_spacings(2);
659 _wr.setUpdating (true);
660 Inkscape::UI::Widget::ScalarUnit * sutemp;
661 _rumg->init (_("Grid _units:"), "units", _wr, repr, doc);
662 _rsu_ox->init (_("_Origin X:"), _("X coordinate of grid origin"),
663 "originx", *_rumg, _wr, repr, doc);
664 sutemp = _rsu_ox->getSU();
665 sutemp->setDigits(4);
666 sutemp->setIncrements(0.1, 1.0);
667 _rsu_oy->init (_("O_rigin Y:"), _("Y coordinate of grid origin"),
668 "originy", *_rumg, _wr, repr, doc);
669 sutemp = _rsu_oy->getSU();
670 sutemp->setDigits(4);
671 sutemp->setIncrements(0.1, 1.0);
672 _rsu_sx->init (_("Spacing _X:"), _("Distance between vertical grid lines"),
673 "spacingx", *_rumg, _wr, repr, doc);
674 sutemp = _rsu_sx->getSU();
675 sutemp->setDigits(4);
676 sutemp->setIncrements(0.1, 1.0);
677 _rsu_sy->init (_("Spacing _Y:"), _("Distance between horizontal grid lines"),
678 "spacingy", *_rumg, _wr, repr, doc);
679 sutemp = _rsu_sy->getSU();
680 sutemp->setDigits(4);
681 sutemp->setIncrements(0.1, 1.0);
682 _rcp_gcol->init (_("Grid line _color:"), _("Grid line color"),
683 _("Color of grid lines"), "color", "opacity", _wr, repr, doc);
684 _rcp_gmcol->init (_("Ma_jor grid line color:"), _("Major grid line color"),
685 _("Color of the major (highlighted) grid lines"),
686 "empcolor", "empopacity", _wr, repr, doc);
687 _rsi->init (_("_Major grid line every:"), _("lines"), "empspacing", _wr, repr, doc);
689 Inkscape::UI::Widget::RegisteredCheckButton * _rcb_dotted = Gtk::manage(
690 new Inkscape::UI::Widget::RegisteredCheckButton( _("_Show dots instead of lines"),
691 _("If set, displays dots at gridpoints instead of gridlines"),
692 "dotted", _wr, false, repr, doc)
693 );
694 _wr.setUpdating (false);
696 Gtk::Widget const *const widget_array[] = {
697 _rumg->_label, _rumg->_sel,
698 0, _rsu_ox->getSU(),
699 0, _rsu_oy->getSU(),
700 0, _rsu_sx->getSU(),
701 0, _rsu_sy->getSU(),
702 _rcp_gcol->_label, _rcp_gcol->_cp,
703 0, 0,
704 _rcp_gmcol->_label, _rcp_gmcol->_cp,
705 _rsi->_label, &_rsi->_hbox,
706 0, _rcb_dotted,
707 };
709 attach_all (*table, widget_array, sizeof(widget_array));
711 if (repr) readRepr();
713 // set widget values
714 _rumg->setUnit (gridunit);
716 gdouble val;
717 val = origin[NR::X];
718 val = sp_pixels_get_units (val, *(gridunit));
719 _rsu_ox->setValue (val);
720 val = origin[NR::Y];
721 val = sp_pixels_get_units (val, *(gridunit));
722 _rsu_oy->setValue (val);
723 val = spacing[NR::X];
724 double gridx = sp_pixels_get_units (val, *(gridunit));
725 _rsu_sx->setValue (gridx);
726 val = spacing[NR::Y];
727 double gridy = sp_pixels_get_units (val, *(gridunit));
728 _rsu_sy->setValue (gridy);
730 _rcp_gcol->setRgba32 (color);
731 _rcp_gmcol->setRgba32 (empcolor);
732 _rsi->setValue (empspacing);
734 _rcb_dotted->setActive(render_dotted);
736 return table;
737 }
740 /**
741 * Update dialog widgets from object's values.
742 */
743 void
744 CanvasXYGrid::updateWidgets()
745 {
746 /*
747 if (_wr.isUpdating()) return;
749 _wr.setUpdating (true);
751 _rcb_visible.setActive(visible);
752 if (snapper != NULL) {
753 _rcb_enabled.setActive(snapper->getEnabled());
754 }
756 _rumg.setUnit (gridunit);
758 gdouble val;
759 val = origin[NR::X];
760 val = sp_pixels_get_units (val, *(gridunit));
761 _rsu_ox.setValue (val);
762 val = origin[NR::Y];
763 val = sp_pixels_get_units (val, *(gridunit));
764 _rsu_oy.setValue (val);
765 val = spacing[NR::X];
766 double gridx = sp_pixels_get_units (val, *(gridunit));
767 _rsu_sx.setValue (gridx);
768 val = spacing[NR::Y];
769 double gridy = sp_pixels_get_units (val, *(gridunit));
770 _rsu_sy.setValue (gridy);
772 _rcp_gcol.setRgba32 (color);
773 _rcp_gmcol.setRgba32 (empcolor);
774 _rsi.setValue (empspacing);
776 _rcb_dotted.setActive(render_dotted);
778 _wr.setUpdating (false);
780 return;
781 */
782 }
786 void
787 CanvasXYGrid::Update (NR::Matrix const &affine, unsigned int /*flags*/)
788 {
789 ow = origin * affine;
790 sw = spacing * affine;
791 sw -= NR::Point(affine[4], affine[5]);
793 for(int dim = 0; dim < 2; dim++) {
794 gint scaling_factor = empspacing;
796 if (scaling_factor <= 1)
797 scaling_factor = 5;
799 scaled[dim] = FALSE;
800 sw[dim] = fabs (sw[dim]);
801 while (sw[dim] < 8.0) {
802 scaled[dim] = TRUE;
803 sw[dim] *= scaling_factor;
804 /* First pass, go up to the major line spacing, then
805 keep increasing by two. */
806 scaling_factor = 2;
807 }
808 }
809 }
812 static void
813 grid_hline (SPCanvasBuf *buf, gint y, gint xs, gint xe, guint32 rgba)
814 {
815 if ((y >= buf->rect.y0) && (y < buf->rect.y1)) {
816 guint r, g, b, a;
817 gint x0, x1, x;
818 guchar *p;
819 r = NR_RGBA32_R (rgba);
820 g = NR_RGBA32_G (rgba);
821 b = NR_RGBA32_B (rgba);
822 a = NR_RGBA32_A (rgba);
823 x0 = MAX (buf->rect.x0, xs);
824 x1 = MIN (buf->rect.x1, xe + 1);
825 p = buf->buf + (y - buf->rect.y0) * buf->buf_rowstride + (x0 - buf->rect.x0) * 3;
826 for (x = x0; x < x1; x++) {
827 p[0] = NR_COMPOSEN11_1111 (r, a, p[0]);
828 p[1] = NR_COMPOSEN11_1111 (g, a, p[1]);
829 p[2] = NR_COMPOSEN11_1111 (b, a, p[2]);
830 p += 3;
831 }
832 }
833 }
835 static void
836 grid_vline (SPCanvasBuf *buf, gint x, gint ys, gint ye, guint32 rgba)
837 {
838 if ((x >= buf->rect.x0) && (x < buf->rect.x1)) {
839 guint r, g, b, a;
840 gint y0, y1, y;
841 guchar *p;
842 r = NR_RGBA32_R(rgba);
843 g = NR_RGBA32_G (rgba);
844 b = NR_RGBA32_B (rgba);
845 a = NR_RGBA32_A (rgba);
846 y0 = MAX (buf->rect.y0, ys);
847 y1 = MIN (buf->rect.y1, ye + 1);
848 p = buf->buf + (y0 - buf->rect.y0) * buf->buf_rowstride + (x - buf->rect.x0) * 3;
849 for (y = y0; y < y1; y++) {
850 p[0] = NR_COMPOSEN11_1111 (r, a, p[0]);
851 p[1] = NR_COMPOSEN11_1111 (g, a, p[1]);
852 p[2] = NR_COMPOSEN11_1111 (b, a, p[2]);
853 p += buf->buf_rowstride;
854 }
855 }
856 }
858 static void
859 grid_dot (SPCanvasBuf *buf, gint x, gint y, guint32 rgba)
860 {
861 if ( (y >= buf->rect.y0) && (y < buf->rect.y1)
862 && (x >= buf->rect.x0) && (x < buf->rect.x1) ) {
863 guint r, g, b, a;
864 guchar *p;
865 r = NR_RGBA32_R (rgba);
866 g = NR_RGBA32_G (rgba);
867 b = NR_RGBA32_B (rgba);
868 a = NR_RGBA32_A (rgba);
869 p = buf->buf + (y - buf->rect.y0) * buf->buf_rowstride + (x - buf->rect.x0) * 3;
870 p[0] = NR_COMPOSEN11_1111 (r, a, p[0]);
871 p[1] = NR_COMPOSEN11_1111 (g, a, p[1]);
872 p[2] = NR_COMPOSEN11_1111 (b, a, p[2]);
873 }
874 }
876 void
877 CanvasXYGrid::Render (SPCanvasBuf *buf)
878 {
879 gdouble const sxg = floor ((buf->rect.x0 - ow[NR::X]) / sw[NR::X]) * sw[NR::X] + ow[NR::X];
880 gint const xlinestart = (gint) Inkscape::round((sxg - ow[NR::X]) / sw[NR::X]);
881 gdouble const syg = floor ((buf->rect.y0 - ow[NR::Y]) / sw[NR::Y]) * sw[NR::Y] + ow[NR::Y];
882 gint const ylinestart = (gint) Inkscape::round((syg - ow[NR::Y]) / sw[NR::Y]);
884 //set correct coloring, depending preference (when zoomed out, always major coloring or minor coloring)
885 guint32 _empcolor;
886 bool preference = prefs_get_int_attribute ("options.grids", "no_emphasize_when_zoomedout", 0) == 1;
887 if( (scaled[NR::X] || scaled[NR::Y]) && preference ) {
888 _empcolor = color;
889 } else {
890 _empcolor = empcolor;
891 }
893 if (!render_dotted) {
894 gint ylinenum;
895 gdouble y;
896 for (y = syg, ylinenum = ylinestart; y < buf->rect.y1; y += sw[NR::Y], ylinenum++) {
897 gint const y0 = (gint) Inkscape::round(y);
898 if (!scaled[NR::Y] && (ylinenum % empspacing) != 0) {
899 grid_hline (buf, y0, buf->rect.x0, buf->rect.x1 - 1, color);
900 } else {
901 grid_hline (buf, y0, buf->rect.x0, buf->rect.x1 - 1, _empcolor);
902 }
903 }
905 gint xlinenum;
906 gdouble x;
907 for (x = sxg, xlinenum = xlinestart; x < buf->rect.x1; x += sw[NR::X], xlinenum++) {
908 gint const ix = (gint) Inkscape::round(x);
909 if (!scaled[NR::X] && (xlinenum % empspacing) != 0) {
910 grid_vline (buf, ix, buf->rect.y0, buf->rect.y1, color);
911 } else {
912 grid_vline (buf, ix, buf->rect.y0, buf->rect.y1, _empcolor);
913 }
914 }
915 } else {
916 gint ylinenum;
917 gdouble y;
918 for (y = syg, ylinenum = ylinestart; y < buf->rect.y1; y += sw[NR::Y], ylinenum++) {
919 gint const iy = (gint) Inkscape::round(y);
921 gint xlinenum;
922 gdouble x;
923 for (x = sxg, xlinenum = xlinestart; x < buf->rect.x1; x += sw[NR::X], xlinenum++) {
924 gint const ix = (gint) Inkscape::round(x);
925 if ( (!scaled[NR::X] && (xlinenum % empspacing) == 0)
926 || (!scaled[NR::Y] && (ylinenum % empspacing) == 0) )
927 {
928 grid_dot (buf, ix, iy, _empcolor | (guint32)0x000000FF); // put alpha to max value
929 } else {
930 grid_dot (buf, ix, iy, color | (guint32)0x000000FF); // put alpha to max value
931 }
932 }
934 }
935 }
936 }
938 CanvasXYGridSnapper::CanvasXYGridSnapper(CanvasXYGrid *grid, SPNamedView const *nv, NR::Coord const d) : LineSnapper(nv, d)
939 {
940 this->grid = grid;
941 }
943 LineSnapper::LineList
944 CanvasXYGridSnapper::_getSnapLines(NR::Point const &p) const
945 {
946 LineList s;
948 if ( grid == NULL ) {
949 return s;
950 }
952 for (unsigned int i = 0; i < 2; ++i) {
954 /* This is to make sure we snap to only visible grid lines */
955 double scaled_spacing = grid->sw[i]; // this is spacing of visible lines if screen pixels
957 // convert screen pixels to px
958 // FIXME: after we switch to snapping dist in screen pixels, this will be unnecessary
959 if (SP_ACTIVE_DESKTOP) {
960 scaled_spacing /= SP_ACTIVE_DESKTOP->current_zoom();
961 }
963 NR::Coord rounded;
964 NR::Point point_on_line;
966 rounded = Inkscape::Util::round_to_upper_multiple_plus(p[i], scaled_spacing, grid->origin[i]);
967 point_on_line = i ? NR::Point(0, rounded) : NR::Point(rounded, 0);
968 s.push_back(std::make_pair(component_vectors[i], point_on_line));
970 rounded = Inkscape::Util::round_to_lower_multiple_plus(p[i], scaled_spacing, grid->origin[i]);
971 point_on_line = i ? NR::Point(0, rounded) : NR::Point(rounded, 0);
972 s.push_back(std::make_pair(component_vectors[i], point_on_line));
973 }
975 return s;
976 }
978 void CanvasXYGridSnapper::_addSnappedLine(SnappedConstraints &sc, NR::Point const snapped_point, NR::Coord const snapped_distance, NR::Point const normal_to_line, NR::Point const point_on_line) const
979 {
980 SnappedLine dummy = SnappedLine(snapped_point, snapped_distance, getSnapperTolerance(), getSnapperAlwaysSnap(), normal_to_line, point_on_line);
981 sc.grid_lines.push_back(dummy);
982 }
984 /**
985 * \return true if this Snapper will snap at least one kind of point.
986 */
987 bool CanvasXYGridSnapper::ThisSnapperMightSnap() const
988 {
989 return _named_view == NULL ? false : (_snap_enabled && _snap_from != 0);
990 }
996 }; /* namespace Inkscape */
999 /*
1000 Local Variables:
1001 mode:c++
1002 c-file-style:"stroustrup"
1003 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1004 indent-tabs-mode:nil
1005 fill-column:99
1006 End:
1007 */
1008 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :