6 #include <gdk/gdkkeysyms.h>
9 typedef struct _point {
15 typedef struct _line {
19 typedef struct _edge {
26 typedef struct _trapezoid {
28 const edge_t *left, *right;
30 typedef struct _traps {
36 typedef struct _edges {
44 typedef struct _event {
53 int x, y; /* (top, bottom) for trap */
57 typedef struct _events {
58 struct _events *prev, *next;
71 typedef struct _EventView {
74 events_t *events_list;
75 events_t *current_events;
83 gint mag_drag_x, mag_drag_y;
86 typedef struct _EventViewClass {
87 GtkWidgetClass parent_class;
90 G_DEFINE_TYPE (EventView, event_view, GTK_TYPE_WIDGET)
93 edges_lookup (edges_t *edges, gulong id)
95 return &edges->edges[GPOINTER_TO_UINT(g_hash_table_lookup (edges->ht,
101 _compute_intersection_x_for_y (const line_t *line,
104 gdouble dx = line->p2.x - line->p1.x;
105 gdouble dy = line->p2.y - line->p1.y;
115 x += (y - line->p1.y)*dx/dy;
120 _compute_intersection_point (const line_t *line,
124 p->x = _compute_intersection_x_for_y (line, p->y = y);
128 _edge_path (cairo_t *cr, const cairo_matrix_t *m, const edge_t *e)
132 x = e->p1.x; y = e->p1.y;
133 cairo_matrix_transform_point (m, &x, &y);
134 cairo_move_to (cr, x, y);
136 x = e->p2.x; y = e->p2.y;
137 cairo_matrix_transform_point (m, &x, &y);
138 cairo_line_to (cr, x, y);
141 cairo_set_source_rgb (cr, 0, 0, 1);
143 cairo_set_source_rgb (cr, 1, 0, 0);
148 _events_draw (events_t *events, cairo_t *cr, cairo_matrix_t *m)
150 double dash[2] = {8, 8};
154 /* first the existing and proto-traps */
156 cairo_set_matrix (cr, m);
158 cairo_set_source_rgba (cr, 1, 0, 0, .15);
159 for (n = 0; n < events->prototraps->num_traps; n++) {
160 const trapezoid_t *t = &events->prototraps->traps[n];
162 _compute_intersection_point (&t->left->line, t->top, &p);
163 cairo_move_to (cr, p.x, p.y);
164 _compute_intersection_point (&t->right->line, t->top, &p);
165 cairo_line_to (cr, p.x, p.y);
166 _compute_intersection_point (&t->right->line, t->bottom, &p);
167 cairo_line_to (cr, p.x, p.y);
168 _compute_intersection_point (&t->left->line, t->bottom, &p);
169 cairo_line_to (cr, p.x, p.y);
170 cairo_close_path (cr);
174 cairo_set_source_rgba (cr, 0, 1, 0, .2);
175 for (n = 0; n < events->traps->num_traps; n++) {
176 const trapezoid_t *t = &events->traps->traps[n];
178 _compute_intersection_point (&t->left->line, t->top, &p);
179 cairo_move_to (cr, p.x, p.y);
180 _compute_intersection_point (&t->right->line, t->top, &p);
181 cairo_line_to (cr, p.x, p.y);
182 _compute_intersection_point (&t->right->line, t->bottom, &p);
183 cairo_line_to (cr, p.x, p.y);
184 _compute_intersection_point (&t->left->line, t->bottom, &p);
185 cairo_line_to (cr, p.x, p.y);
186 cairo_close_path (cr);
189 } cairo_restore (cr);
193 cairo_set_line_width (cr, 1.);
194 for (n = 0; n < events->edges->num_edges; n++) {
195 const edge_t *e = &events->edges->edges[n];
198 x = e->p1.x; y = e->p1.y;
199 cairo_matrix_transform_point (m, &x, &y);
200 cairo_move_to (cr, x, y);
202 x = e->p2.x; y = e->p2.y;
203 cairo_matrix_transform_point (m, &x, &y);
204 cairo_line_to (cr, x, y);
207 cairo_set_source_rgba (cr, 0, 0, 1., .4);
208 cairo_set_dash (cr, dash, 2, fmod (e->p1.x, dash[0]+dash[1]) + dash[0]);
210 cairo_set_source_rgba (cr, 1, 0, 0., 4);
211 cairo_set_dash (cr, dash, 2, fmod (e->p1.x, dash[0]+dash[1]));
216 x = e->p1.x; y = e->p1.y;
217 cairo_matrix_transform_point (m, &x, &y);
218 cairo_arc (cr, x, y, 2., 0, 2 * G_PI);
220 x = e->p2.x; y = e->p2.y;
221 cairo_matrix_transform_point (m, &x, &y);
222 cairo_arc (cr, x, y, 2., 0, 2 * G_PI);
233 e = &events->events[events->current_event];
235 cairo_set_line_width (cr, 2.);
236 cairo_set_matrix (cr, m);
238 events->extents.p1.x,
241 events->extents.p2.x,
243 cairo_identity_matrix (cr);
247 cairo_matrix_transform_point (m, &x, &y);
252 cairo_arc (cr, x, y, 4., 0, 2 * G_PI);
260 cairo_set_source_rgb (cr, 1, 0, 0);
263 cairo_set_source_rgb (cr, 0, 0, 1);
266 cairo_set_source_rgb (cr, 1, 0, 1);
274 cairo_set_line_width (cr, 1.);
277 _edge_path (cr, m, edges_lookup (events->edges, e->e1));
281 _edge_path (cr, m, edges_lookup (events->edges, e->e1));
285 _edge_path (cr, m, edges_lookup (events->edges, e->e1));
287 _edge_path (cr, m, edges_lookup (events->edges, e->e2));
291 } cairo_restore (cr);
295 event_view_draw (EventView *self, cairo_t *cr)
298 gdouble sf_x, sf_y, sf;
300 gdouble x0, x1, y0, y1;
304 cairo_set_source_rgb (cr, 1, 1, 1);
308 events = self->current_events;
312 mid = (events->extents.p2.x + events->extents.p1.x) / 2.;
313 dim = (events->extents.p2.x - events->extents.p1.x) / 2. * 1.2;
314 sf_x = self->widget.allocation.width / dim / 2;
316 mid = (events->extents.p2.y + events->extents.p1.y) / 2.;
317 dim = (events->extents.p2.y - events->extents.p1.y) / 2. * 1.2;
318 sf_y = self->widget.allocation.height / dim / 2;
320 sf = MIN (sf_x, sf_y);
322 mid = (events->extents.p2.x + events->extents.p1.x) / 2.;
323 dim = sf_x / sf * (events->extents.p2.x - events->extents.p1.x) / 2. * 1.2;
326 mid = (events->extents.p2.y + events->extents.p1.y) / 2.;
327 dim = sf_y / sf * (events->extents.p2.y - events->extents.p1.y) / 2. * 1.2;
331 cairo_matrix_init_scale (&m, sf, sf);
332 cairo_matrix_translate (&m, -x0, -y0);
333 _events_draw (events, cr, &m);
335 /* draw a zoom view of the area around the mouse */
337 double zoom = self->mag_zoom;
338 int size = self->mag_size;
341 cairo_rectangle (cr, self->mag_x, self->mag_y, size, size);
342 cairo_stroke_preserve (cr);
343 cairo_set_source_rgb (cr, 1, 1, 1);
344 cairo_fill_preserve (cr);
347 /* compute roi in extents */
348 cairo_translate (cr, self->mag_x + size/2, self->mag_y + size/2);
350 cairo_matrix_init_scale (&m, zoom, zoom);
351 cairo_matrix_translate (&m, -(self->px / sf + x0), -(self->py /sf + y0));
352 _events_draw (events, cr, &m);
359 -zoom*fmod (self->px/sf + x0, 1.),
360 -zoom*fmod (self->py/sf + y0, 1.));
361 for (i = -size/2/zoom - 1; i <= size/2/zoom + 1; i++) {
362 cairo_move_to (cr, zoom*i, -size/2);
363 cairo_line_to (cr, zoom*i, size/2 + zoom);
364 cairo_move_to (cr, -size/2, zoom*i);
365 cairo_line_to (cr, size/2 + zoom, zoom*i);
367 cairo_set_source_rgba (cr, .7, .7, .7, .5);
368 cairo_set_line_width (cr, 1.);
370 } cairo_restore (cr);
371 } cairo_restore (cr);
375 event_view_draw_labels (EventView *self, cairo_t *cr)
379 events = self->current_events;
386 event_view_expose (GtkWidget *w, GdkEventExpose *ev)
388 EventView *self = (EventView *) w;
391 cr = gdk_cairo_create (w->window);
392 gdk_cairo_region (cr, ev->region);
395 event_view_draw (self, cr);
396 event_view_draw_labels (self, cr);
403 traps_clear (traps_t *traps)
405 traps->num_traps = 0;
409 traps_add (traps_t *traps, int top, int bot, const edge_t *e1, const edge_t *e2)
413 if (traps->num_traps == traps->size) {
415 traps = g_realloc (traps,
416 sizeof (traps_t) + traps->size*sizeof (trapezoid_t));
419 t = &traps->traps[traps->num_traps++];
421 if (bot > e1->bottom)
423 if (bot > e2->bottom)
434 traps_remove (traps_t *traps, int top, const edge_t *e1, const edge_t *e2)
438 for (n = 0; n < traps->num_traps; n++) {
439 trapezoid_t *t = &traps->traps[n];
440 if (t->top == top && t->left == e1 && t->right == e2)
443 if (n < traps->num_traps) {
444 g_memmove (&traps->traps[n],
446 (traps->num_traps-n+1) * sizeof (trapezoid_t));
452 event_next (EventView *self)
457 events = self->current_events;
458 if (++events->current_event == events->num_events) {
460 } else if (events->current_event >= events->num_events) {
461 traps_clear (events->prototraps);
462 traps_clear (events->traps);
463 events->current_event = 0;
465 self->current_events = events->next;
466 if (self->current_events == NULL)
467 self->current_events = self->events_list;
468 events = self->current_events;
471 e = &events->events[events->current_event];
474 events->prototraps = traps_add (events->prototraps,
476 edges_lookup (events->edges, e->e1),
477 edges_lookup (events->edges, e->e2));
480 traps_remove (events->prototraps,
482 edges_lookup (events->edges, e->e1),
483 edges_lookup (events->edges, e->e2));
484 events->traps = traps_add (events->traps,
486 edges_lookup (events->edges, e->e1),
487 edges_lookup (events->edges, e->e2));
493 event_view_button_press (GtkWidget *w, GdkEventButton *ev)
495 EventView *self = (EventView *) w;
497 if (ev->x < self->mag_x ||
498 ev->y < self->mag_y ||
499 ev->x > self->mag_x + self->mag_size ||
500 ev->y > self->mag_y + self->mag_size)
502 if (ev->type == GDK_BUTTON_PRESS) {
504 gtk_widget_queue_draw (w);
509 self->in_mag_drag = TRUE;
510 self->mag_drag_x = ev->x;
511 self->mag_drag_y = ev->y;
518 event_view_button_release (GtkWidget *w, GdkEventButton *ev)
520 EventView *self = (EventView *) w;
522 self->in_mag_drag = FALSE;
528 event_view_motion (GtkWidget *w, GdkEventMotion *ev)
530 EventView *self = (EventView *) w;
532 if (self->in_mag_drag) {
533 self->mag_x += ev->x - self->mag_drag_x;
534 self->mag_y += ev->y - self->mag_drag_y;
536 gtk_widget_queue_draw (&self->widget);
538 self->mag_drag_x = ev->x;
539 self->mag_drag_y = ev->y;
540 } else if (ev->x < self->mag_x ||
541 ev->y < self->mag_y ||
542 ev->x > self->mag_x + self->mag_size ||
543 ev->y > self->mag_y + self->mag_size)
548 gtk_widget_queue_draw (&self->widget);
555 event_view_realize (GtkWidget *widget)
557 GdkWindowAttr attributes;
559 GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
561 attributes.window_type = GDK_WINDOW_CHILD;
562 attributes.x = widget->allocation.x;
563 attributes.y = widget->allocation.y;
564 attributes.width = widget->allocation.width;
565 attributes.height = widget->allocation.height;
566 attributes.wclass = GDK_INPUT_OUTPUT;
567 attributes.visual = gtk_widget_get_visual (widget);
568 attributes.colormap = gtk_widget_get_colormap (widget);
569 attributes.event_mask = gtk_widget_get_events (widget) |
570 GDK_BUTTON_PRESS_MASK |
571 GDK_BUTTON_RELEASE_MASK |
573 GDK_KEY_RELEASE_MASK |
574 GDK_POINTER_MOTION_MASK |
575 GDK_BUTTON_MOTION_MASK |
578 widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
580 GDK_WA_X | GDK_WA_Y |
581 GDK_WA_VISUAL | GDK_WA_COLORMAP);
582 gdk_window_set_user_data (widget->window, widget);
584 widget->style = gtk_style_attach (widget->style, widget->window);
585 gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
589 event_view_size_allocate (GtkWidget *w, GdkRectangle *r)
591 EventView *self = (EventView *) w;
593 GTK_WIDGET_CLASS (event_view_parent_class)->size_allocate (w, r);
595 self->mag_x = w->allocation.width - self->mag_size - 10;
596 self->mag_y = w->allocation.height - self->mag_size - 10;
600 event_view_finalize (GObject *obj)
602 G_OBJECT_CLASS (event_view_parent_class)->finalize (obj);
606 event_view_class_init (EventViewClass *klass)
608 GObjectClass *object_class = (GObjectClass *) klass;
609 GtkWidgetClass *widget_class = (GtkWidgetClass *) klass;
611 object_class->finalize = event_view_finalize;
613 widget_class->realize = event_view_realize;
614 widget_class->size_allocate = event_view_size_allocate;
615 widget_class->expose_event = event_view_expose;
616 widget_class->button_press_event = event_view_button_press;
617 widget_class->button_release_event = event_view_button_release;
618 widget_class->motion_notify_event = event_view_motion;
622 event_view_init (EventView *self)
625 self->mag_size = 200;
633 t = g_malloc (sizeof (traps_t) + 16 * sizeof (trapezoid_t));
642 _edges_add_edge (edges_t *edges, edge_t *e, box_t *extents)
644 if (e->top < extents->p1.y)
645 extents->p1.y = e->top;
646 if (e->bottom > extents->p2.y)
647 extents->p2.y = e->bottom;
649 _compute_intersection_point (&e->line, e->top, &e->p1);
650 _compute_intersection_point (&e->line, e->bottom, &e->p2);
652 if (e->p1.x < extents->p1.x)
653 extents->p1.x = e->p1.x;
654 if (e->p2.x < extents->p1.x)
655 extents->p1.x = e->p2.x;
657 if (e->p1.x > extents->p2.x)
658 extents->p2.x = e->p1.x;
659 if (e->p2.x > extents->p2.x)
660 extents->p2.x = e->p2.x;
662 if (edges->num_edges == edges->size) {
664 edges = g_realloc (edges,
665 sizeof (edges_t) + edges->size * sizeof (edge_t));
668 g_hash_table_insert (edges->ht,
669 GUINT_TO_POINTER (e->id),
670 GUINT_TO_POINTER (edges->num_edges));
671 edges->edges[edges->num_edges++] = *e;
677 _events_add_event (events_t *events,
680 gulong e1, gulong e2)
684 if (events->num_events == events->size_events) {
685 int newsize = 2 * events->size_events;
688 newevents = g_renew (event_t, events->events, newsize);
689 events->events = newevents;
690 events->size_events = newsize;
693 e = &events->events[events->num_events++];
706 t = g_malloc (sizeof (edges_t) + 16 * sizeof (edge_t));
707 t->ht = g_hash_table_new (NULL, NULL);
719 events = g_malloc (sizeof (events_t));
724 events->events = g_new (event_t, 16);
725 events->size_events = 16;
726 events->num_events = 0;
727 events->current_event = 0;
729 events->edges = edges_new ();
730 events->prototraps = traps_new ();
731 events->traps = traps_new ();
733 events->extents.p1.x = G_MAXDOUBLE;
734 events->extents.p1.y = G_MAXDOUBLE;
735 events->extents.p2.x = -G_MAXDOUBLE;
736 events->extents.p2.y = -G_MAXDOUBLE;
742 events_read (EventView *ev, const char *filename)
746 file = fopen (filename, "r");
752 events = ev->events_list = events_new ();
753 while (getline (&line, &len, file) != -1) {
754 line = g_strstrip (line);
756 events->next = events_new ();
757 events->next->prev = events;
758 events = events->next;
759 } else if (g_str_has_prefix (line, "edge:")) {
762 sscanf (line, "edge: %lu (%lf, %lf) (%lf, %lf) (%lf, %lf) %d",
772 events->edges = _edges_add_edge (events->edges,
775 } else if (g_str_has_prefix (line, "event:")) {
780 sscanf (line, "event: %d (%d, %d) %lu %lu",
784 _events_add_event (events, type, x, y, e1, e2);
785 } else if (g_str_has_prefix (line, "begin trap:")) {
789 sscanf (line, "begin trap: %lu %lu %u", &e1, &e2, &top);
791 _events_add_event (events, START_TRAP, top, 0, e1, e2);
792 } else if (g_str_has_prefix (line, "end trap:")) {
796 sscanf (line, "end trap: %lu %lu %d %d",
797 &e1, &e2, &top, &bottom);
799 _events_add_event (events, END_TRAP, top, bottom, e1, e2);
803 ev->current_events = ev->events_list;
811 timeout_advance (EventView *self)
814 gtk_widget_queue_draw (&self->widget);
819 main (int argc, char **argv)
822 GtkWidget *window, *hbox;
824 gtk_init (&argc, &argv);
826 hbox = gtk_hbox_new (TRUE, 0);
828 ev = g_object_new (event_view_get_type (), NULL);
829 gtk_box_pack_start (GTK_BOX (hbox), &ev->widget, TRUE, TRUE, 0);
830 gtk_widget_show (&ev->widget);
832 events_read (ev, argv[1]);
833 g_timeout_add (750, (GSourceFunc) timeout_advance, ev);
835 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
836 gtk_widget_set_size_request (window, 800, 800);
837 g_signal_connect (window, "delete-event",
838 G_CALLBACK (gtk_main_quit), NULL);
839 gtk_container_add (GTK_CONTAINER (window), hbox);
840 gtk_widget_show (hbox);
841 gtk_widget_show (window);