2 * Copyright © 2010 Kristian Høgsberg
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
33 #include <gdk-pixbuf/gdk-pixbuf.h>
35 #include "wayland-client.h"
36 #include "wayland-glib.h"
41 struct window *window;
42 struct display *display;
44 struct item *items[16];
48 cairo_surface_t *translucent;
49 cairo_surface_t *opaque;
50 int hotspot_x, hotspot_y;
55 int x_offset, y_offset;
56 const char *mime_type;
62 struct wl_array types;
63 const char *drag_type;
69 cairo_surface_t *surface;
74 struct dnd_flower_message {
75 int seed, x_offset, y_offset;
79 static const int item_width = 64;
80 static const int item_height = 64;
81 static const int item_padding = 16;
84 item_create(struct display *display, int x, int y, int seed)
89 item = malloc(sizeof *item);
94 gettimeofday(&tv, NULL);
95 item->seed = seed ? seed : tv.tv_usec;
98 const int petal_count = 3 + random() % 5;
99 const double r1 = 20 + random() % 10;
100 const double r2 = 5 + random() % 12;
101 const double u = (10 + random() % 90) / 100.0;
102 const double v = (random() % 90) / 100.0;
106 double t, dt = 2 * M_PI / (petal_count * 2);
107 double x1, y1, x2, y2, x3, y3;
108 struct rectangle rect;
111 rect.width = item_width;
112 rect.height = item_height;
113 item->surface = display_create_surface(display, &rect);
118 cr = cairo_create(item->surface);
119 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
120 cairo_set_source_rgba(cr, 0, 0, 0, 0);
123 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
124 cairo_translate(cr, item_width / 2, item_height / 2);
126 cairo_move_to(cr, cos(t) * r1, sin(t) * r1);
127 for (i = 0; i < petal_count; i++, t += dt * 2) {
130 x2 = cos(t + dt) * r2;
131 y2 = sin(t + dt) * r2;
132 x3 = cos(t + 2 * dt) * r1;
133 y3 = sin(t + 2 * dt) * r1;
136 x1 - y1 * u, y1 + x1 * u,
137 x2 + y2 * v, y2 - x2 * v,
141 x2 - y2 * v, y2 + x2 * v,
142 x3 + y3 * u, y3 - x3 * u,
146 cairo_close_path(cr);
148 cairo_set_source_rgba(cr,
149 0.5 + (random() % 50) / 49.0,
150 0.5 + (random() % 50) / 49.0,
151 0.5 + (random() % 50) / 49.0,
152 0.5 + (random() % 100) / 99.0);
154 cairo_fill_preserve(cr);
156 cairo_set_line_width(cr, 1);
157 cairo_set_source_rgba(cr,
158 0.5 + (random() % 50) / 49.0,
159 0.5 + (random() % 50) / 49.0,
160 0.5 + (random() % 50) / 49.0,
161 0.5 + (random() % 100) / 99.0);
170 dnd_draw(struct dnd *dnd)
172 struct rectangle allocation;
174 cairo_surface_t *surface;
177 window_draw(dnd->window);
179 surface = window_get_surface(dnd->window);
180 cr = cairo_create(surface);
181 window_get_child_allocation(dnd->window, &allocation);
182 cairo_rectangle(cr, allocation.x, allocation.y,
183 allocation.width, allocation.height);
185 cairo_push_group(cr);
187 cairo_translate(cr, allocation.x, allocation.y);
188 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
189 cairo_set_source_rgba(cr, 0, 0, 0, 0.8);
192 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
193 for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) {
196 cairo_set_source_surface(cr, dnd->items[i]->surface,
197 dnd->items[i]->x, dnd->items[i]->y);
201 cairo_pop_group_to_source(cr);
204 cairo_surface_destroy(surface);
205 window_flush(dnd->window);
209 redraw_handler(struct window *window, void *data)
211 struct dnd *dnd = data;
217 keyboard_focus_handler(struct window *window,
218 struct input *device, void *data)
220 struct dnd *dnd = data;
222 window_schedule_redraw(dnd->window);
226 dnd_offer_destroy(struct dnd_offer *dnd_offer)
228 dnd_offer->refcount--;
229 if (dnd_offer->refcount == 0) {
230 wl_array_release(&dnd_offer->types);
236 dnd_add_item(struct dnd *dnd, struct item *item)
240 for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) {
241 if (dnd->items[i] == 0) {
242 dnd->items[i] = item;
250 dnd_get_item(struct dnd *dnd, int32_t x, int32_t y)
253 struct rectangle allocation;
256 window_get_child_allocation(dnd->window, &allocation);
261 for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) {
262 item = dnd->items[i];
264 item->x <= x && x < item->x + item_width &&
265 item->y <= y && y < item->y + item_height)
273 drag_target(void *data,
274 struct wl_drag *drag, const char *mime_type)
276 struct dnd_drag *dnd_drag = data;
277 struct dnd *dnd = dnd_drag->dnd;
278 struct wl_input_device *device;
279 cairo_surface_t *surface;
280 struct wl_buffer *buffer;
282 fprintf(stderr, "target %s\n", mime_type);
283 device = input_get_input_device(dnd_drag->input);
284 dnd_drag->mime_type = mime_type;
286 surface = dnd_drag->opaque;
288 surface = dnd_drag->translucent;
290 buffer = display_get_buffer_for_surface(dnd->display, surface);
291 wl_input_device_attach(device, dnd_drag->time, buffer,
292 dnd_drag->hotspot_x, dnd_drag->hotspot_y);
296 drag_finish(void *data, struct wl_drag *drag, int fd)
298 struct dnd_drag *dnd_drag = data;
300 if (!dnd_drag->mime_type) {
301 dnd_add_item(dnd_drag->dnd, dnd_drag->item);
302 window_schedule_redraw(dnd_drag->dnd->window);
306 struct dnd_flower_message dnd_flower_message;
309 dnd_flower_message.seed = dnd_drag->item->seed;
311 dnd_flower_message.x_offset = dnd_drag->x_offset;
312 dnd_flower_message.y_offset = dnd_drag->y_offset;
314 fprintf(stderr, "got 'finish', fd %d, sending dnd_flower_message\n", fd);
316 write(fd, &dnd_flower_message, sizeof dnd_flower_message);
319 /* The 'finish' event marks the end of the session on the drag
320 * source side and we need to clean up the drag object created
321 * and the local state. */
322 wl_drag_destroy(drag);
324 /* Destroy the item that has been dragged out */
325 cairo_surface_destroy(dnd_drag->item->surface);
326 free(dnd_drag->item);
328 cairo_surface_destroy(dnd_drag->translucent);
329 cairo_surface_destroy(dnd_drag->opaque);
334 drag_reject(void *data, struct wl_drag *drag)
336 struct dnd_drag *dnd_drag = data;
338 dnd_add_item(dnd_drag->dnd, dnd_drag->item);
339 window_schedule_redraw(dnd_drag->dnd->window);
342 static const struct wl_drag_listener drag_listener = {
349 drag_offer_offer(void *data,
350 struct wl_drag_offer *offer, const char *type)
352 struct dnd_offer *dnd_offer = data;
355 p = wl_array_add(&dnd_offer->types, sizeof *p);
361 drag_offer_pointer_focus(void *data,
362 struct wl_drag_offer *offer,
363 uint32_t time, struct wl_surface *surface,
364 int32_t x, int32_t y,
365 int32_t surface_x, int32_t surface_y)
367 struct dnd_offer *dnd_offer = data;
368 struct window *window;
371 /* The last event in a dnd session is pointer_focus with a
372 * NULL surface, whether or not we get the drop event. We
373 * need to clean up the dnd_offer proxy and whatever state we
376 fprintf(stderr, "pointer focus NULL, session over\n");
377 wl_drag_offer_destroy(offer);
378 dnd_offer_destroy(dnd_offer);
382 fprintf(stderr, "drag pointer focus %p\n", surface);
383 fprintf(stderr, "offered types:\n");
384 end = dnd_offer->types.data + dnd_offer->types.size;
385 for (p = dnd_offer->types.data; p < end; p++)
386 fprintf(stderr, "\%s\n", *p);
388 window = wl_surface_get_user_data(surface);
389 dnd_offer->dnd = window_get_user_data(window);
391 if (!dnd_get_item(dnd_offer->dnd, surface_x, surface_y)) {
392 wl_drag_offer_accept(offer, time, "application/x-wayland-dnd-flower");
393 dnd_offer->drag_type = "application/x-wayland-dnd-flower";
394 dnd_offer->x = surface_x;
395 dnd_offer->y = surface_y;
397 wl_drag_offer_accept(offer, time, NULL);
398 dnd_offer->drag_type = NULL;
403 drag_offer_motion(void *data,
404 struct wl_drag_offer *offer, uint32_t time,
405 int32_t x, int32_t y, int32_t surface_x, int32_t surface_y)
407 struct dnd_offer *dnd_offer = data;
409 if (!dnd_get_item(dnd_offer->dnd, surface_x, surface_y)) {
410 fprintf(stderr, "drag offer motion %d, %d, accepting\n",
411 surface_x, surface_y);
412 wl_drag_offer_accept(offer, time, "application/x-wayland-dnd-flower");
413 dnd_offer->drag_type = "application/x-wayland-dnd-flower";
414 dnd_offer->x = surface_x;
415 dnd_offer->y = surface_y;
417 fprintf(stderr, "drag offer motion %d, %d, declining\n",
418 surface_x, surface_y);
419 wl_drag_offer_accept(offer, time, NULL);
420 dnd_offer->drag_type = NULL;
425 drop_io_func(GIOChannel *source, GIOCondition condition, gpointer data)
427 struct dnd_offer *dnd_offer = data;
428 struct dnd *dnd = dnd_offer->dnd;
429 struct dnd_flower_message dnd_flower_message;
434 fd = g_io_channel_unix_get_fd(source);
435 len = read(fd, &dnd_flower_message, sizeof dnd_flower_message);
436 fprintf(stderr, "read %d bytes\n", len);
439 g_source_remove(dnd_offer->tag);
441 g_io_channel_unref(source);
443 item = item_create(dnd->display,
444 dnd_offer->x - dnd_flower_message.x_offset - 26,
445 dnd_offer->y - dnd_flower_message.y_offset - 66,
446 dnd_flower_message.seed);
448 dnd_add_item(dnd, item);
449 window_schedule_redraw(dnd->window);
451 dnd_offer_destroy(dnd_offer);
457 drag_offer_drop(void *data, struct wl_drag_offer *offer)
459 struct dnd_offer *dnd_offer = data;
463 if (!dnd_offer->drag_type) {
464 fprintf(stderr, "got 'drop', but no target\n");
465 wl_drag_offer_reject(offer);
469 fprintf(stderr, "got 'drop', sending write end of pipe\n");
471 dnd_offer->refcount++;
473 wl_drag_offer_receive(offer, p[1]);
476 channel = g_io_channel_unix_new(p[0]);
477 dnd_offer->tag = g_io_add_watch(channel, G_IO_IN,
478 drop_io_func, dnd_offer);
481 static const struct wl_drag_offer_listener drag_offer_listener = {
483 drag_offer_pointer_focus,
489 global_handler(struct display *display,
490 const char *interface, uint32_t id, uint32_t version)
492 struct wl_drag_offer *offer;
493 struct dnd_offer *dnd_offer;
495 if (strcmp(interface, "drag_offer") != 0)
498 offer = wl_drag_offer_create(display_get_display(display), id);
500 dnd_offer = malloc(sizeof *dnd_offer);
501 if (dnd_offer == NULL)
504 dnd_offer->refcount = 1;
506 wl_drag_offer_add_listener(offer, &drag_offer_listener, dnd_offer);
507 wl_array_init(&dnd_offer->types);
510 static cairo_surface_t *
511 create_drag_cursor(struct dnd_drag *dnd_drag,
512 struct item *item, int32_t x, int32_t y, double opacity)
514 struct dnd *dnd = dnd_drag->dnd;
515 cairo_surface_t *surface, *pointer;
516 int32_t pointer_width, pointer_height, hotspot_x, hotspot_y;
517 struct rectangle rectangle;
518 cairo_pattern_t *pattern;
521 pointer = display_get_pointer_surface(dnd->display,
528 rectangle.width = item_width + 2 * pointer_width;
529 rectangle.height = item_height + 2 * pointer_height;
530 surface = display_create_surface(dnd->display, &rectangle);
532 cr = cairo_create(surface);
533 cairo_translate(cr, pointer_width, pointer_height);
535 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
536 cairo_set_source_rgba(cr, 0, 0, 0, 0);
539 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
540 cairo_set_source_surface(cr, item->surface, 0, 0);
541 pattern = cairo_pattern_create_rgba(0, 0, 0, opacity);
542 cairo_mask(cr, pattern);
543 cairo_pattern_destroy(pattern);
545 cairo_set_source_surface(cr, pointer,
546 x - item->x - hotspot_x,
547 y - item->y - hotspot_y);
548 cairo_surface_destroy(pointer);
550 /* FIXME: more cairo-gl brokeness */
551 display_flush_cairo_device(dnd->display);
554 dnd_drag->hotspot_x = pointer_width + x - item->x;
555 dnd_drag->hotspot_y = pointer_height + y - item->y;
561 dnd_button_handler(struct window *window,
562 struct input *input, uint32_t time,
563 int button, int state, void *data)
565 struct dnd *dnd = data;
568 struct rectangle allocation;
569 struct dnd_drag *dnd_drag;
570 struct wl_drag *drag;
573 window_get_child_allocation(dnd->window, &allocation);
574 input_get_position(input, &x, &y);
575 item = dnd_get_item(dnd, x, y);
579 if (item && state == 1) {
580 fprintf(stderr, "start drag, item %p\n", item);
582 dnd_drag = malloc(sizeof *dnd_drag);
584 dnd_drag->input = input;
585 dnd_drag->time = time;
586 dnd_drag->item = item;
587 dnd_drag->x_offset = x - item->x;
588 dnd_drag->y_offset = y - item->y;
590 for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) {
591 if (item == dnd->items[i]){
598 create_drag_cursor(dnd_drag, item, x, y, 1);
599 dnd_drag->translucent =
600 create_drag_cursor(dnd_drag, item, x, y, 0.2);
602 drag = window_create_drag(window);
603 wl_drag_offer(drag, "application/x-wayland-dnd-flower");
604 window_activate_drag(drag, window, input, time);
605 wl_drag_add_listener(drag, &drag_listener, dnd_drag);
606 window_schedule_redraw(dnd->window);
611 dnd_motion_handler(struct window *window,
612 struct input *input, uint32_t time,
613 int32_t x, int32_t y,
614 int32_t sx, int32_t sy, void *data)
616 struct dnd *dnd = data;
619 item = dnd_get_item(dnd, sx, sy);
622 return POINTER_HAND1;
624 return POINTER_LEFT_PTR;
628 dnd_create(struct display *display)
633 int32_t width, height;
635 dnd = malloc(sizeof *dnd);
638 memset(dnd, 0, sizeof *dnd);
640 title = g_strdup_printf("Wayland Drag and Drop Demo");
642 dnd->window = window_create(display, title, 500, 400);
643 dnd->display = display;
646 for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) {
647 x = (i % 4) * (item_width + item_padding) + item_padding;
648 y = (i / 4) * (item_height + item_padding) + item_padding;
649 if ((i ^ (i >> 2)) & 1)
650 dnd->items[i] = item_create(display, x, y, 0);
652 dnd->items[i] = NULL;
655 window_set_user_data(dnd->window, dnd);
656 window_set_redraw_handler(dnd->window, redraw_handler);
657 window_set_keyboard_focus_handler(dnd->window,
658 keyboard_focus_handler);
659 window_set_button_handler(dnd->window,
662 window_set_motion_handler(dnd->window,
665 width = 4 * (item_width + item_padding) + item_padding;
666 height = 4 * (item_height + item_padding) + item_padding;
667 window_set_child_size(dnd->window, width, height);
674 static const GOptionEntry option_entries[] = {
679 main(int argc, char *argv[])
684 d = display_create(&argc, &argv, option_entries);
686 fprintf(stderr, "failed to create display: %m\n");
690 display_set_global_handler(d, global_handler);
692 dnd = dnd_create (d);