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/*
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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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}; |
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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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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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struct wl_buffer *buffer; |
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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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buffer = display_get_buffer_for_surface(dnd->display, |
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surface); |
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window_start_drag(window, input, time, |
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buffer, |
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pointer_width + x - item->x, |
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pointer_height + y - item->y); |
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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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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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