From b8cc24e1a894d6ec2b74e39700f057743cb1870b Mon Sep 17 00:00:00 2001 From: =?utf8?q?Kristian=20H=C3=B8gsberg?= Date: Wed, 18 Aug 2010 20:31:06 -0400 Subject: [PATCH] Actually add dnd client --- clients/dnd.c | 360 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 360 insertions(+) create mode 100644 clients/dnd.c diff --git a/clients/dnd.c b/clients/dnd.c new file mode 100644 index 0000000..5772e8e --- /dev/null +++ b/clients/dnd.c @@ -0,0 +1,360 @@ +/* + * 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; +} -- 2.7.4