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