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Actually add dnd client

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Kristian Høgsberg 15 years ago
parent 9a686243b6
commit b8cc24e1a8
1 changed files with 360 additions and 0 deletions
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      clients/dnd.c

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clients/dnd.c
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/*
* 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 <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <math.h>
#include <sys/time.h>
#include <cairo.h>
#include <glib.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#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;
}
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