2 * Copyright © 2010 Intel Corporation
3 * Copyright © 2012 Collabora, Ltd.
4 * Copyright © 2012 Jonas Ådahl
6 * Permission to use, copy, modify, distribute, and sell this software and its
7 * documentation for any purpose is hereby granted without fee, provided that
8 * the above copyright notice appear in all copies and that both that copyright
9 * notice and this permission notice appear in supporting documentation, and
10 * that the name of the copyright holders not be used in advertising or
11 * publicity pertaining to distribution of the software without specific,
12 * written prior permission. The copyright holders make no representations
13 * about the suitability of this software for any purpose. It is provided "as
14 * is" without express or implied warranty.
16 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
17 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
18 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
19 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
20 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
21 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
35 #include <linux/input.h>
36 #include <wayland-client.h>
41 struct display *display;
42 struct window *window;
43 struct widget *widget;
45 cairo_surface_t *buffer;
60 draw_line(struct clickdot *clickdot, cairo_t *cr,
61 struct rectangle *allocation)
64 cairo_surface_t *tmp_buffer = NULL;
66 if (clickdot->reset) {
67 tmp_buffer = clickdot->buffer;
68 clickdot->buffer = NULL;
69 clickdot->line.x = -1;
70 clickdot->line.y = -1;
71 clickdot->line.old_x = -1;
72 clickdot->line.old_y = -1;
76 if (clickdot->buffer == NULL) {
78 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
81 bcr = cairo_create(clickdot->buffer);
82 cairo_set_source_rgba(bcr, 0, 0, 0, 0);
85 allocation->width, allocation->height);
89 bcr = cairo_create(clickdot->buffer);
92 cairo_set_source_surface(bcr, tmp_buffer, 0, 0);
93 cairo_rectangle(bcr, 0, 0,
94 allocation->width, allocation->height);
98 cairo_surface_destroy(tmp_buffer);
101 if (clickdot->line.x != -1 && clickdot->line.y != -1) {
102 if (clickdot->line.old_x != -1 &&
103 clickdot->line.old_y != -1) {
104 cairo_set_line_width(bcr, 2.0);
105 cairo_set_source_rgb(bcr, 1, 1, 1);
107 -allocation->x, -allocation->y);
110 clickdot->line.old_x,
111 clickdot->line.old_y);
119 clickdot->line.old_x = clickdot->line.x;
120 clickdot->line.old_y = clickdot->line.y;
124 cairo_set_source_surface(cr, clickdot->buffer,
125 allocation->x, allocation->y);
126 cairo_set_operator(cr, CAIRO_OPERATOR_ADD);
128 allocation->x, allocation->y,
129 allocation->width, allocation->height);
135 redraw_handler(struct widget *widget, void *data)
137 static const double r = 10.0;
138 struct clickdot *clickdot = data;
139 cairo_surface_t *surface;
141 struct rectangle allocation;
143 widget_get_allocation(clickdot->widget, &allocation);
145 surface = window_get_surface(clickdot->window);
147 cr = cairo_create(surface);
148 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
154 cairo_set_source_rgba(cr, 0, 0, 0, 0.8);
157 draw_line(clickdot, cr, &allocation);
159 cairo_translate(cr, clickdot->dot.x + 0.5, clickdot->dot.y + 0.5);
160 cairo_set_line_width(cr, 1.0);
161 cairo_set_source_rgb(cr, 0.1, 0.9, 0.9);
162 cairo_move_to(cr, 0.0, -r);
163 cairo_line_to(cr, 0.0, r);
164 cairo_move_to(cr, -r, 0.0);
165 cairo_line_to(cr, r, 0.0);
166 cairo_arc(cr, 0.0, 0.0, r, 0.0, 2.0 * M_PI);
171 cairo_surface_destroy(surface);
175 keyboard_focus_handler(struct window *window,
176 struct input *device, void *data)
178 struct clickdot *clickdot = data;
180 window_schedule_redraw(clickdot->window);
184 key_handler(struct window *window, struct input *input, uint32_t time,
185 uint32_t key, uint32_t sym,
186 enum wl_keyboard_key_state state, void *data)
188 struct clickdot *clickdot = data;
190 if (state == WL_KEYBOARD_KEY_STATE_RELEASED)
195 display_exit(clickdot->display);
201 button_handler(struct widget *widget,
202 struct input *input, uint32_t time,
204 enum wl_pointer_button_state state, void *data)
206 struct clickdot *clickdot = data;
208 if (state == WL_POINTER_BUTTON_STATE_PRESSED && button == BTN_LEFT)
209 input_get_position(input, &clickdot->dot.x, &clickdot->dot.y);
211 widget_schedule_redraw(widget);
215 motion_handler(struct widget *widget,
216 struct input *input, uint32_t time,
217 float x, float y, void *data)
219 struct clickdot *clickdot = data;
220 clickdot->line.x = x;
221 clickdot->line.y = y;
223 window_schedule_redraw(clickdot->window);
225 return CURSOR_LEFT_PTR;
229 resize_handler(struct widget *widget,
230 int32_t width, int32_t height,
233 struct clickdot *clickdot = data;
239 leave_handler(struct widget *widget,
240 struct input *input, void *data)
242 struct clickdot *clickdot = data;
247 static struct clickdot *
248 clickdot_create(struct display *display)
250 struct clickdot *clickdot;
252 clickdot = xzalloc(sizeof *clickdot);
253 clickdot->window = window_create(display);
254 clickdot->widget = window_frame_create(clickdot->window, clickdot);
255 window_set_title(clickdot->window, "Wayland ClickDot");
256 clickdot->display = display;
257 clickdot->buffer = NULL;
259 window_set_key_handler(clickdot->window, key_handler);
260 window_set_user_data(clickdot->window, clickdot);
261 window_set_keyboard_focus_handler(clickdot->window,
262 keyboard_focus_handler);
264 widget_set_redraw_handler(clickdot->widget, redraw_handler);
265 widget_set_button_handler(clickdot->widget, button_handler);
266 widget_set_motion_handler(clickdot->widget, motion_handler);
267 widget_set_resize_handler(clickdot->widget, resize_handler);
268 widget_set_leave_handler(clickdot->widget, leave_handler);
270 widget_schedule_resize(clickdot->widget, 500, 400);
271 clickdot->dot.x = 250;
272 clickdot->dot.y = 200;
273 clickdot->line.x = -1;
274 clickdot->line.y = -1;
275 clickdot->line.old_x = -1;
276 clickdot->line.old_y = -1;
283 clickdot_destroy(struct clickdot *clickdot)
285 if (clickdot->buffer)
286 cairo_surface_destroy(clickdot->buffer);
287 widget_destroy(clickdot->widget);
288 window_destroy(clickdot->window);
293 main(int argc, char *argv[])
295 struct display *display;
296 struct clickdot *clickdot;
298 display = display_create(&argc, argv);
299 if (display == NULL) {
300 fprintf(stderr, "failed to create display: %m\n");
304 clickdot = clickdot_create(display);
306 display_run(display);
308 clickdot_destroy(clickdot);
309 display_destroy(display);