mirror of
https://gitlab.freedesktop.org/wayland/weston
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![Derek Foreman](/assets/img/avatar_default.png)
The frame callback added on button click re-adds itself when done, so adding a new one every click resulted in an ever increasing number of callbacks. Signed-off-by: Derek Foreman <derekf@osg.samsung.com> Acked-by: Daniel Stone <daniels@collabora.com>
455 lines
11 KiB
C
455 lines
11 KiB
C
/*
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* Copyright © 2010 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "config.h"
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#include <stdbool.h>
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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 <cairo.h>
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#include <math.h>
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#include <assert.h>
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#include <linux/input.h>
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#include <wayland-client.h>
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#include "window.h"
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#include "shared/xalloc.h"
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struct spring {
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double current;
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double target;
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double previous;
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};
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struct resizor {
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struct display *display;
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struct window *window;
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struct widget *widget;
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struct window *menu;
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struct spring width;
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struct spring height;
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struct wl_callback *frame_callback;
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bool pointer_locked;
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bool locked_frame_callback_registered;
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struct input *locked_input;
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float pointer_x;
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float pointer_y;
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};
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static void
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spring_update(struct spring *spring)
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{
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double current, force;
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current = spring->current;
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force = (spring->target - current) / 20.0 +
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(spring->previous - current);
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spring->current = current + (current - spring->previous) + force;
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spring->previous = current;
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}
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static int
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spring_done(struct spring *spring)
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{
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return fabs(spring->previous - spring->target) < 0.1;
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}
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static const struct wl_callback_listener listener;
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static void
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frame_callback(void *data, struct wl_callback *callback, uint32_t time)
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{
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struct resizor *resizor = data;
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assert(!callback || callback == resizor->frame_callback);
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if (resizor->frame_callback) {
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wl_callback_destroy(resizor->frame_callback);
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resizor->frame_callback = NULL;
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}
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if (window_is_maximized(resizor->window))
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return;
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spring_update(&resizor->width);
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spring_update(&resizor->height);
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widget_schedule_resize(resizor->widget,
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resizor->width.current + 0.5,
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resizor->height.current + 0.5);
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if (!spring_done(&resizor->width) || !spring_done(&resizor->height)) {
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resizor->frame_callback =
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wl_surface_frame(
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window_get_wl_surface(resizor->window));
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wl_callback_add_listener(resizor->frame_callback, &listener,
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resizor);
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}
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}
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static const struct wl_callback_listener listener = {
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frame_callback
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};
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static void
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redraw_handler(struct widget *widget, void *data)
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{
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struct resizor *resizor = data;
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cairo_surface_t *surface;
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cairo_t *cr;
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struct rectangle allocation;
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widget_get_allocation(resizor->widget, &allocation);
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surface = window_get_surface(resizor->window);
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cr = cairo_create(surface);
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cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
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cairo_rectangle(cr,
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allocation.x,
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allocation.y,
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allocation.width,
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allocation.height);
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cairo_set_source_rgba(cr, 0, 0, 0, 0.8);
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cairo_fill(cr);
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cairo_destroy(cr);
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cairo_surface_destroy(surface);
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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 resizor *resizor = data;
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window_schedule_redraw(resizor->window);
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}
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static void
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key_handler(struct window *window, struct input *input, uint32_t time,
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uint32_t key, uint32_t sym, enum wl_keyboard_key_state state,
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void *data)
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{
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struct resizor *resizor = data;
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struct rectangle allocation;
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if (state == WL_KEYBOARD_KEY_STATE_RELEASED)
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return;
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window_get_allocation(resizor->window, &allocation);
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resizor->width.current = allocation.width;
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if (spring_done(&resizor->width))
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resizor->width.target = allocation.width;
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resizor->height.current = allocation.height;
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if (spring_done(&resizor->height))
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resizor->height.target = allocation.height;
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switch (sym) {
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case XKB_KEY_Up:
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if (allocation.height < 400)
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break;
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resizor->height.target = allocation.height - 200;
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break;
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case XKB_KEY_Down:
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if (allocation.height > 1000)
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break;
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resizor->height.target = allocation.height + 200;
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break;
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case XKB_KEY_Left:
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if (allocation.width < 400)
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break;
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resizor->width.target = allocation.width - 200;
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break;
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case XKB_KEY_Right:
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if (allocation.width > 1000)
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break;
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resizor->width.target = allocation.width + 200;
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break;
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case XKB_KEY_Escape:
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display_exit(resizor->display);
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break;
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}
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if (!resizor->frame_callback)
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frame_callback(resizor, NULL, 0);
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}
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static void
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menu_func(void *data, struct input *input, int index)
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{
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fprintf(stderr, "picked entry %d\n", index);
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}
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static void
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show_menu(struct resizor *resizor, struct input *input, uint32_t time)
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{
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int32_t x, y;
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static const char *entries[] = {
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"Roy", "Pris", "Leon", "Zhora"
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};
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input_get_position(input, &x, &y);
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window_show_menu(resizor->display, input, time, resizor->window,
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x - 10, y - 10, menu_func, entries, 4);
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}
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static void
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locked_pointer_handle_motion(struct window *window,
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struct input *input,
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uint32_t time,
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float dx,
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float dy,
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void *data)
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{
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struct resizor *resizor = data;
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resizor->width.current += dx;
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resizor->width.previous = resizor->width.current;
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resizor->width.target = resizor->width.current;
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resizor->height.current += dy;
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resizor->height.previous = resizor->height.current;
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resizor->height.target = resizor->height.current;
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widget_schedule_resize(resizor->widget,
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resizor->width.current,
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resizor->height.current);
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}
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static void
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handle_pointer_locked(struct window *window, struct input *input, void *data)
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{
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struct resizor *resizor = data;
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resizor->pointer_locked = true;
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input_set_pointer_image(input, CURSOR_BLANK);
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}
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static void
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handle_pointer_unlocked(struct window *window, struct input *input, void *data)
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{
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struct resizor *resizor = data;
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resizor->pointer_locked = false;
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input_set_pointer_image(input, CURSOR_LEFT_PTR);
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}
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static const struct wl_callback_listener locked_pointer_frame_listener;
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static void
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locked_pointer_frame_callback(void *data,
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struct wl_callback *callback,
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uint32_t time)
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{
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struct resizor *resizor = data;
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struct wl_surface *surface;
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struct rectangle allocation;
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float x, y;
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if (resizor->pointer_locked) {
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widget_get_allocation(resizor->widget, &allocation);
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x = resizor->pointer_x + (allocation.width - allocation.x);
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y = resizor->pointer_y + (allocation.height - allocation.y);
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widget_set_locked_pointer_cursor_hint(resizor->widget, x, y);
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}
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wl_callback_destroy(callback);
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surface = window_get_wl_surface(resizor->window);
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callback = wl_surface_frame(surface);
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wl_callback_add_listener(callback,
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&locked_pointer_frame_listener,
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resizor);
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}
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static const struct wl_callback_listener locked_pointer_frame_listener = {
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locked_pointer_frame_callback
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};
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static void
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button_handler(struct widget *widget,
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struct input *input, uint32_t time,
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uint32_t button, enum wl_pointer_button_state state, void *data)
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{
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struct resizor *resizor = data;
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struct rectangle allocation;
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struct wl_surface *surface;
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struct wl_callback *callback;
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if (button == BTN_RIGHT && state == WL_POINTER_BUTTON_STATE_PRESSED) {
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show_menu(resizor, input, time);
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} else if (button == BTN_LEFT &&
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state == WL_POINTER_BUTTON_STATE_PRESSED) {
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window_get_allocation(resizor->window, &allocation);
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resizor->width.current = allocation.width;
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resizor->width.previous = allocation.width;
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resizor->width.target = allocation.width;
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resizor->height.current = allocation.height;
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resizor->height.previous = allocation.height;
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resizor->height.target = allocation.height;
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window_lock_pointer(resizor->window, input);
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window_set_pointer_locked_handler(resizor->window,
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handle_pointer_locked,
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handle_pointer_unlocked);
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resizor->locked_input = input;
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if (resizor->locked_frame_callback_registered)
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return;
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surface = window_get_wl_surface(resizor->window);
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callback = wl_surface_frame(surface);
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wl_callback_add_listener(callback,
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&locked_pointer_frame_listener,
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resizor);
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resizor->locked_frame_callback_registered = true;
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} else if (button == BTN_LEFT &&
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state == WL_POINTER_BUTTON_STATE_RELEASED) {
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input_set_pointer_image(input, CURSOR_LEFT_PTR);
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window_unlock_pointer(resizor->window);
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}
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}
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static void
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set_cursor_inv_offset(struct resizor *resizor, float x, float y)
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{
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struct rectangle allocation;
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widget_get_allocation(resizor->widget, &allocation);
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resizor->pointer_x = x - (allocation.width - allocation.x);
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resizor->pointer_y = y - (allocation.height - allocation.y);
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}
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static int
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enter_handler(struct widget *widget,
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struct input *input,
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float x, float y, void *data)
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{
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struct resizor *resizor = data;
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set_cursor_inv_offset(resizor, x , y);
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return CURSOR_LEFT_PTR;
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}
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static int
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motion_handler(struct widget *widget,
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struct input *input, uint32_t time,
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float x, float y, void *data)
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{
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struct resizor *resizor = data;
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set_cursor_inv_offset(resizor, x , y);
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return CURSOR_LEFT_PTR;
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}
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static struct resizor *
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resizor_create(struct display *display)
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{
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struct resizor *resizor;
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resizor = xzalloc(sizeof *resizor);
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resizor->window = window_create(display);
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resizor->widget = window_frame_create(resizor->window, resizor);
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window_set_title(resizor->window, "Wayland Resizor");
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resizor->display = display;
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window_set_key_handler(resizor->window, key_handler);
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window_set_user_data(resizor->window, resizor);
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widget_set_redraw_handler(resizor->widget, redraw_handler);
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window_set_keyboard_focus_handler(resizor->window,
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keyboard_focus_handler);
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widget_set_enter_handler(resizor->widget, enter_handler);
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widget_set_motion_handler(resizor->widget, motion_handler);
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window_set_locked_pointer_motion_handler(
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resizor->window, locked_pointer_handle_motion);
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widget_set_button_handler(resizor->widget, button_handler);
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resizor->height.previous = 400;
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resizor->height.current = 400;
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resizor->height.target = 400;
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resizor->width.previous = 400;
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resizor->width.current = 400;
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resizor->width.target = 400;
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widget_schedule_resize(resizor->widget, 400, 400);
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return resizor;
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}
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static void
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resizor_destroy(struct resizor *resizor)
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{
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if (resizor->frame_callback)
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wl_callback_destroy(resizor->frame_callback);
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widget_destroy(resizor->widget);
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window_destroy(resizor->window);
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free(resizor);
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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 *display;
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struct resizor *resizor;
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display = display_create(&argc, argv);
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if (display == NULL) {
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fprintf(stderr, "failed to create display: %m\n");
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return -1;
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}
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resizor = resizor_create(display);
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display_run(display);
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resizor_destroy(resizor);
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display_destroy(display);
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return 0;
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}
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