weston/clients/eventdemo.c
Kristian Høgsberg 9de79a92a6 window.c: Drop global handler argument
We can just register a global handler directly on the wl_display now.
2011-08-29 17:12:36 -04:00

397 lines
11 KiB
C

/*
* Copyright © 2011 Tim Wiederhake
*
* 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.
*/
/**
* \file eventdemo.c
* \brief Demonstrate the use of Wayland's toytoolkit.
*
* Heavily commented demo program that can report all events that are
* dispatched to the window. For other functionality, eg. opengl/egl,
* drag and drop, etc. have a look at the other demos.
* \author Tim Wiederhake
*/
#include <stdio.h>
#include <stdlib.h>
#include <cairo.h>
#include <glib.h>
#include "window.h"
/** window title */
static char *title = "EventDemo";
/** window width */
static int width = 500;
/** window height */
static int height = 400;
/** set if window has no borders */
static int noborder = 0;
/** if non-zero, maximum window width */
static int width_max = 0;
/** if non-zero, maximum window height */
static int height_max = 0;
/** set to log redrawing */
static int log_redraw = 0;
/** set to log resizing */
static int log_resize = 0;
/** set to log keyboard focus */
static int log_focus = 0;
/** set to log key events */
static int log_key = 0;
/** set to log button events */
static int log_button = 0;
/** set to log motion events */
static int log_motion = 0;
/**
* \struct eventdemo
* \brief Holds all data the program needs per window
*
* In this demo the struct holds the position of a
* red rectangle that is drawn in the window's area.
*/
struct eventdemo {
struct window *window;
struct display *display;
unsigned int x, y, w, h;
};
/**
* \brief Redraws the window
*
* Draws a red rectangle as demonstration of per-window data.
*/
static void
eventdemo_draw(struct eventdemo *e) {
if (log_redraw)
printf("redraw\n");
cairo_surface_t *surface;
cairo_t *cr;
struct rectangle rect;
window_draw(e->window);
window_get_child_allocation(e->window, &rect);
surface = window_get_surface(e->window);
cr = cairo_create(surface);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_rectangle(cr, rect.x, rect.y, rect.width, rect.height);
cairo_set_source_rgba(cr, 0, 0, 0, 0.8);
cairo_fill(cr);
cairo_rectangle(cr, e->x, e->y, e->w, e->h);
cairo_set_source_rgba(cr, 1.0, 0, 0, 1);
cairo_fill(cr);
cairo_destroy(cr);
cairo_surface_destroy(surface);
window_flush(e->window);
}
/**
* \brief CALLBACK function, Wayland requests the window to redraw.
* \param window window to be redrawn
* \param data user data associated to the window
*/
static void
redraw_handler(struct window *window, void *data)
{
struct eventdemo *e = data;
eventdemo_draw(e);
}
/**
* \brief CALLBACK function, Wayland requests the window to resize.
* \param window window to be resized
* \param width desired width
* \param height desired height
* \param data user data associated to the window
*/
static void
resize_handler(struct window *window,
int32_t width, int32_t height, void *data)
{
struct eventdemo *e = data;
if (log_resize)
printf("resize width: %d, height: %d\n", width, height);
/* if a maximum width is set, constrain to it */
if (width_max && width_max < width)
width = width_max;
/* if a maximum height is set, constrain to it */
if (height_max && height_max < height)
height = height_max;
/* set the new window dimensions */
window_set_child_size(e->window, width, height);
/* inform Wayland that the window needs to be redrawn */
window_schedule_redraw(e->window);
}
/**
* \brief CALLBACK function, Wayland informs about keyboard focus change
* \param window window
* \param device device that caused the focus change
* \param data user data associated to the window
*/
static void
keyboard_focus_handler(struct window *window,
struct input *device, void *data)
{
int32_t x, y;
struct eventdemo *e = data;
if(log_focus) {
if(device) {
input_get_position(device, &x, &y);
printf("focus x: %d, y: %d\n", x, y);
} else {
printf("focus lost\n");
}
}
window_schedule_redraw(e->window);
}
/**
* \brief CALLBACK function, Wayland informs about key event
* \param window window
* \param key keycode
* \param unicode associated character
* \param state pressed or released
* \param modifiers modifiers: ctrl, alt, meta etc.
* \param data user data associated to the window
*/
static void
key_handler(struct window *window, struct input *input, uint32_t time,
uint32_t key, uint32_t unicode, uint32_t state, void *data)
{
uint32_t modifiers = input_get_modifiers(input);
if(!log_key)
return;
printf("key key: %d, unicode: %d, state: %d, modifiers: %d\n",
key, unicode, state, modifiers);
}
/**
* \brief CALLBACK function, Wayland informs about button event
* \param window window
* \param input input device that caused the button event
* \param time time the event happend
* \param button button
* \param state pressed or released
* \param data user data associated to the window
*/
static void
button_handler(struct window *window, struct input *input, uint32_t time,
int button, int state, void *data)
{
int32_t x, y;
if (!log_button)
return;
input_get_position(input, &x, &y);
printf("button time: %d, button: %d, state: %d, x: %d, y: %d\n",
time, button, state, x, y);
}
/**
* \brief CALLBACK function, Waylands informs about pointer motion
* \param window window
* \param input input device that caused the motion event
* \param time time the event happend
* \param x absolute x position
* \param y absolute y position
* \param sx x position relative to the window
* \param sy y position relative to the window
* \param data user data associated to the window
*
* Demonstrates the use of different cursors
*/
static int
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 eventdemo *e = data;
if (log_motion) {
printf("motion time: %d, x: %d, y: %d, sx: %d, sy: %d\n",
time, x, y, sx, sy);
}
if(sx > e->x && sx < e->x + e->w)
if(sy > e->y && sy < e->y + e->h)
return POINTER_HAND1;
return POINTER_LEFT_PTR;
}
/**
* \brief Create and initialise a new eventdemo window.
* \param d associated display
*/
static struct eventdemo *
eventdemo_create(struct display *d)
{
struct eventdemo *e;
e = malloc(sizeof (struct eventdemo));
if(e == NULL)
return NULL;
/* Creates a new window with the given title, width and height.
* To set the size of the window for a given usable areas width
* and height in a window decoration agnostic way use:
* window_set_child_size(struct window *window,
* int32_t width, int32_t height);
*/
e->window = window_create(d, width, height);
window_set_title(e->window, title);
e->display = d;
/* The eventdemo window draws a red rectangle as a demonstration
* of per-window data. The dimensions of that rectangle are set
* here.
*/
e->x = width * 1.0 / 4.0;
e->w = width * 2.0 / 4.0;
e->y = height * 1.0 / 4.0;
e->h = height * 2.0 / 4.0;
/* Connect the user data to the window */
window_set_user_data(e->window, e);
/* Set the callback redraw handler for the window */
window_set_redraw_handler(e->window, redraw_handler);
/* Set the callback resize handler for the window */
window_set_resize_handler(e->window, resize_handler);
/* Set the callback focus handler for the window */
window_set_keyboard_focus_handler(e->window,
keyboard_focus_handler);
/* Set the callback key handler for the window */
window_set_key_handler(e->window, key_handler);
/* Set the callback button handler for the window */
window_set_button_handler(e->window, button_handler);
/* Set the callback motion handler for the window */
window_set_motion_handler(e->window, motion_handler);
/* Demonstrate how to create a borderless window.
Move windows with META + left mouse button.
*/
if(noborder) {
window_set_decoration(e->window, 0);
}
/* Initial drawing of the window */
eventdemo_draw(e);
return e;
}
/**
* \brief command line options for eventdemo
*
* see
* http://developer.gimp.org/api/2.0/glib/glib-Commandline-option-parser.html
*/
static const GOptionEntry option_entries[] = {
{"title", 0, 0, G_OPTION_ARG_STRING,
&title, "Set the window title to TITLE", "TITLE"},
{"width", 'w', 0, G_OPTION_ARG_INT,
&width, "Set the window's width to W", "W"},
{"height", 'h', 0, G_OPTION_ARG_INT,
&height, "Set the window's height to H", "H"},
{"maxwidth", 0, 0, G_OPTION_ARG_INT,
&width_max, "Set the window's maximum width to W", "W"},
{"maxheight", 0, 0, G_OPTION_ARG_INT,
&height_max, "Set the window's maximum height to H", "H"},
{"noborder", 'b', 0, G_OPTION_ARG_NONE,
&noborder, "Don't draw window borders", 0},
{"log-redraw", 0, 0, G_OPTION_ARG_NONE,
&log_redraw, "Log redraw events to stdout", 0},
{"log-resize", 0, 0, G_OPTION_ARG_NONE,
&log_resize, "Log resize events to stdout", 0},
{"log-focus", 0, 0, G_OPTION_ARG_NONE,
&log_focus, "Log keyboard focus events to stdout", 0},
{"log-key", 0, 0, G_OPTION_ARG_NONE,
&log_key, "Log key events to stdout", 0},
{"log-button", 0, 0, G_OPTION_ARG_NONE,
&log_button, "Log button events to stdout", 0},
{"log-motion", 0, 0, G_OPTION_ARG_NONE,
&log_motion, "Log motion events to stdout", 0},
{NULL}
};
/**
* \brief Connects to the display, creates the window and hands over
* to the main loop.
*/
int
main(int argc, char *argv[])
{
struct display *d;
struct eventdemo *e;
/* Connect to the display and have the arguments parsed */
d = display_create(&argc, &argv, option_entries);
if (d == NULL) {
fprintf(stderr, "failed to create display: %m\n");
return -1;
}
/* Create new eventdemo window */
e = eventdemo_create(d);
if (e == NULL) {
fprintf(stderr, "failed to create eventdemo: %m\n");
return -1;
}
display_run(d);
return 0;
}