/* * Copyright © 2010 Kristian Høgsberg * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of the copyright holders not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. The copyright holders make no representations * about the suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include #include "wayland-client.h" #include "wayland-glib.h" #include "window.h" static const char socket_name[] = "\0wayland"; struct dnd { struct window *window; struct display *display; uint32_t key; struct item *items[16]; }; struct item { cairo_surface_t *surface; int x, y; }; static const int item_width = 64; static const int item_height = 64; static const int item_padding = 16; static struct item * item_create(struct display *display, int x, int y) { const int petal_count = 3 + random() % 5; const double r1 = 20 + random() % 10; const double r2 = 5 + random() % 12; const double u = (10 + random() % 90) / 100.0; const double v = (random() % 90) / 100.0; cairo_t *cr; int i; double t, dt = 2 * M_PI / (petal_count * 2); double x1, y1, x2, y2, x3, y3; struct rectangle rect; struct item *item; item = malloc(sizeof *item); if (item == NULL) return NULL; rect.width = item_width; rect.height = item_height; item->surface = display_create_surface(display, &rect); item->x = x; item->y = y; cr = cairo_create(item->surface); cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); cairo_set_source_rgba(cr, 0, 0, 0, 0); cairo_paint(cr); cairo_set_operator(cr, CAIRO_OPERATOR_OVER); cairo_translate(cr, item_width / 2, item_height / 2); t = random(); cairo_move_to(cr, cos(t) * r1, sin(t) * r1); for (i = 0; i < petal_count; i++, t += dt * 2) { x1 = cos(t) * r1; y1 = sin(t) * r1; x2 = cos(t + dt) * r2; y2 = sin(t + dt) * r2; x3 = cos(t + 2 * dt) * r1; y3 = sin(t + 2 * dt) * r1; cairo_curve_to(cr, x1 - y1 * u, y1 + x1 * u, x2 + y2 * v, y2 - x2 * v, x2, y2); cairo_curve_to(cr, x2 - y2 * v, y2 + x2 * v, x3 + y3 * u, y3 - x3 * u, x3, y3); } cairo_close_path(cr); cairo_set_source_rgba(cr, 0.5 + (random() % 50) / 49.0, 0.5 + (random() % 50) / 49.0, 0.5 + (random() % 50) / 49.0, 0.5 + (random() % 100) / 99.0); cairo_fill_preserve(cr); cairo_set_line_width(cr, 1); cairo_set_source_rgba(cr, 0.5 + (random() % 50) / 49.0, 0.5 + (random() % 50) / 49.0, 0.5 + (random() % 50) / 49.0, 0.5 + (random() % 100) / 99.0); cairo_stroke(cr); cairo_destroy(cr); return item; } static void dnd_draw(struct dnd *dnd) { struct rectangle rectangle; cairo_t *cr; cairo_surface_t *wsurface, *surface; int i; window_draw(dnd->window); window_get_child_rectangle(dnd->window, &rectangle); wsurface = window_get_surface(dnd->window); surface = cairo_surface_create_similar(wsurface, CAIRO_CONTENT_COLOR_ALPHA, rectangle.width, rectangle.height); cr = cairo_create(surface); cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); cairo_set_source_rgba(cr, 0, 0, 0, 0.8); cairo_paint(cr); cairo_set_operator(cr, CAIRO_OPERATOR_OVER); for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) { if (!dnd->items[i]) continue; cairo_set_source_surface(cr, dnd->items[i]->surface, dnd->items[i]->x, dnd->items[i]->y); cairo_paint(cr); } cairo_destroy(cr); window_copy_surface(dnd->window, &rectangle, surface); window_commit(dnd->window, dnd->key); cairo_surface_destroy(surface); } static void redraw_handler(struct window *window, void *data) { struct dnd *dnd = data; dnd_draw(dnd); } static void keyboard_focus_handler(struct window *window, struct input *device, void *data) { struct dnd *dnd = data; window_schedule_redraw(dnd->window); } static struct item * dnd_get_item(struct dnd *dnd, int32_t x, int32_t y) { struct item *item; int i; for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) { item = dnd->items[i]; if (item && item->x <= x && x < item->x + item_width && item->y <= y && y < item->y + item_height) return item; } return NULL; } static void dnd_button_handler(struct window *window, struct input *input, uint32_t time, int button, int state, void *data) { struct dnd *dnd = data; int32_t x, y, hotspot_x, hotspot_y, pointer_width, pointer_height; struct rectangle rectangle; struct item *item; struct wl_buffer *buffer; cairo_surface_t *surface, *pointer; cairo_t *cr; input_get_position(input, &x, &y); window_get_child_rectangle(dnd->window, &rectangle); x -= rectangle.x; y -= rectangle.y; item = dnd_get_item(dnd, x, y); if (item && state == 1) { fprintf(stderr, "start drag, item %p\n", item); pointer = display_get_pointer_surface(dnd->display, POINTER_DRAGGING, &pointer_width, &pointer_height, &hotspot_x, &hotspot_y); rectangle.width = item_width + 2 * pointer_width; rectangle.height = item_height + 2 * pointer_height; surface = display_create_surface(dnd->display, &rectangle); cr = cairo_create(surface); cairo_translate(cr, pointer_width, pointer_height); cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); cairo_set_source_rgba(cr, 0, 0, 0, 0); cairo_paint(cr); cairo_set_operator(cr, CAIRO_OPERATOR_OVER); cairo_set_source_surface(cr, item->surface, 0, 0); cairo_paint(cr); cairo_set_source_surface(cr, pointer, x - item->x - hotspot_x, y - item->y - hotspot_y); cairo_surface_destroy(pointer); cairo_paint(cr); cairo_destroy(cr); buffer = display_get_buffer_for_surface(dnd->display, surface); window_start_drag(window, input, time, buffer, pointer_width + x - item->x, pointer_height + y - item->y); /* FIXME: We leak the surface because we can't free it * until the server has referenced it. */ } } static int dnd_motion_handler(struct window *window, struct input *input, uint32_t time, int32_t x, int32_t y, int32_t sx, int32_t sy, void *data) { struct dnd *dnd = data; struct item *item; struct rectangle rectangle; window_get_child_rectangle(dnd->window, &rectangle); item = dnd_get_item(dnd, sx - rectangle.x, sy - rectangle.y); if (item) return POINTER_HAND1; else return POINTER_LEFT_PTR; } static struct dnd * dnd_create(struct display *display) { struct dnd *dnd; gchar *title; int i, x, y; struct rectangle rectangle; dnd = malloc(sizeof *dnd); if (dnd == NULL) return dnd; memset(dnd, 0, sizeof *dnd); title = g_strdup_printf("Wayland Drag and Drop Demo"); dnd->window = window_create(display, title, 100, 100, 500, 400); dnd->display = display; dnd->key = 100; for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) { x = (i % 4) * (item_width + item_padding) + item_padding; y = (i / 4) * (item_height + item_padding) + item_padding; if ((i ^ (i >> 2)) & 1) dnd->items[i] = item_create(display, x, y); else dnd->items[i] = NULL; } window_set_user_data(dnd->window, dnd); window_set_redraw_handler(dnd->window, redraw_handler); window_set_keyboard_focus_handler(dnd->window, keyboard_focus_handler); window_set_button_handler(dnd->window, dnd_button_handler); window_set_motion_handler(dnd->window, dnd_motion_handler); rectangle.width = 4 * (item_width + item_padding) + item_padding; rectangle.height = 4 * (item_height + item_padding) + item_padding; window_set_child_size(dnd->window, &rectangle); dnd_draw(dnd); return dnd; } static const GOptionEntry option_entries[] = { { NULL } }; int main(int argc, char *argv[]) { struct display *d; struct dnd *dnd; struct timeval tv; gettimeofday(&tv, NULL); srandom(tv.tv_usec); d = display_create(&argc, &argv, option_entries); dnd = dnd_create (d); display_run(d); return 0; }