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/*
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* Copyright © 2010 Intel Corporation
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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 <cairo.h>
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#include <math.h>
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#include "wayland-util.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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#include <X11/keysym.h>
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struct resizor {
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struct display *display;
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struct window *window;
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int32_t width;
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struct {
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double current;
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double target;
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double previous;
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} height;
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};
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static void
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frame_callback(void *data, uint32_t time)
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{
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struct resizor *resizor = data;
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double force, height;
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height = resizor->height.current;
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force = (resizor->height.target - height) / 10.0 +
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(resizor->height.previous - height);
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resizor->height.current =
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height + (height - resizor->height.previous) + force;
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resizor->height.previous = height;
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if (resizor->height.current >= 400) {
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resizor->height.current = 400;
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resizor->height.previous = 400;
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}
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if (resizor->height.current <= 200) {
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resizor->height.current = 200;
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resizor->height.previous = 200;
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}
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window_set_child_size(resizor->window, resizor->width, height + 0.5);
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window_schedule_redraw(resizor->window);
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}
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static void
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resizor_draw(struct resizor *resizor)
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{
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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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window_draw(resizor->window);
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window_get_child_allocation(resizor->window, &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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window_flush(resizor->window);
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if (fabs(resizor->height.previous - resizor->height.target) > 0.1) {
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wl_display_frame_callback(display_get_display(resizor->display),
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frame_callback, resizor);
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}
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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 resizor *resizor = data;
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resizor_draw(resizor);
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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, uint32_t key, uint32_t sym,
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uint32_t state, uint32_t modifiers, void *data)
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{
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struct resizor *resizor = data;
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if (state == 0)
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return;
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switch (sym) {
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case XK_Down:
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resizor->height.target = 400;
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frame_callback(resizor, 0);
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break;
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case XK_Up:
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resizor->height.target = 200;
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frame_callback(resizor, 0);
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break;
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}
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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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int32_t height;
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resizor = malloc(sizeof *resizor);
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if (resizor == NULL)
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return resizor;
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memset(resizor, 0, sizeof *resizor);
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resizor->window = window_create(display, "Wayland Resizor", 500, 400);
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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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window_set_redraw_handler(resizor->window, redraw_handler);
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window_set_keyboard_focus_handler(resizor->window,
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keyboard_focus_handler);
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resizor->width = 300;
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resizor->height.current = 400;
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resizor->height.previous = resizor->height.current;
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resizor->height.target = resizor->height.current;
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height = resizor->height.current + 0.5;
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window_set_child_size(resizor->window, resizor->width, height);
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resizor_draw(resizor);
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return 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 *d;
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d = display_create(&argc, &argv, NULL);
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if (d == 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_create (d);
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display_run(d);
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return 0;
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}
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