weston/clients/eventdemo.c

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/*
* 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 widget *widget;
struct display *display;
int x, y, w, h;
};
/**
* \brief CALLBACK function, Wayland requests the window to redraw.
* \param window window to be redrawn
* \param data user data associated to the window
*
* Draws a red rectangle as demonstration of per-window data.
*/
static void
redraw_handler(struct widget *widget, void *data)
{
struct eventdemo *e = data;
cairo_surface_t *surface;
cairo_t *cr;
struct rectangle rect;
if (log_redraw)
printf("redraw\n");
widget_get_allocation(e->widget, &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);
}
/**
* \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 widget *widget,
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 */
widget_set_size(e->widget, width, height);
}
/**
* \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
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button_handler(struct widget *widget, 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 widget *widget, struct input *input, uint32_t time,
int32_t x, int32_t y, void *data)
{
struct eventdemo *e = data;
if (log_motion) {
printf("motion time: %d, x: %d, y: %d\n", time, x, y);
}
if (x > e->x && x < e->x + e->w)
if (y > e->y && y < 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;
e->window = window_create(d);
e->widget = frame_create(e->window, e);
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 */
widget_set_redraw_handler(e->widget, redraw_handler);
/* Set the callback resize handler for the window */
widget_set_resize_handler(e->widget, 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 */
widget_set_button_handler(e->widget, button_handler);
/* Set the callback motion handler for the window */
widget_set_motion_handler(e->widget, motion_handler);
/* Demonstrate how to create a borderless window.
Move windows with META + left mouse button.
*/
if (noborder) {
}
/* Initial drawing of the window */
window_schedule_resize(e->window, width, height);
return e;
}
/**
* \brief command line options for eventdemo
*/
static const struct weston_option eventdemo_options[] = {
{ WESTON_OPTION_STRING, "title", 0, &title },
{ WESTON_OPTION_INTEGER, "width", 'w', &width },
{ WESTON_OPTION_INTEGER, "height", 'h', &height },
{ WESTON_OPTION_INTEGER, "max-width", 0, &width_max },
{ WESTON_OPTION_INTEGER, "max-height", 0, &height_max },
{ WESTON_OPTION_BOOLEAN, "no-border", 'b', &noborder },
{ WESTON_OPTION_BOOLEAN, "log-redraw", '0', &log_redraw },
{ WESTON_OPTION_BOOLEAN, "log-resize", '0', &log_resize },
{ WESTON_OPTION_BOOLEAN, "log-focus", '0', &log_focus },
{ WESTON_OPTION_BOOLEAN, "log-key", '0', &log_key },
{ WESTON_OPTION_BOOLEAN, "log-button", '0', &log_button },
{ WESTON_OPTION_BOOLEAN, "log-motion", '0', &log_motion },
};
/**
* \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;
argc = parse_options(eventdemo_options,
ARRAY_LENGTH(eventdemo_options), argc, argv);
/* Connect to the display and have the arguments parsed */
d = display_create(argc, argv);
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;
}