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weston/clients/eventdemo.c

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14 KiB

/*
* Copyright © 2011 Tim Wiederhake
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE 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 "config.h"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <cairo.h>
#include "shared/helpers.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 axis events */
static int log_axis = 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;
bool print_pointer_frame;
};
/**
* \brief CALLBACK function, Wayland requests the window to redraw.
* \param widget widget 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 widget widget 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, enum wl_keyboard_key_state state,
void *data)
{
uint32_t modifiers = input_get_modifiers(input);
if (!log_key)
return;
printf("key key: %u, unicode: %u, state: %s, modifiers: 0x%x\n",
key, unicode,
(state == WL_KEYBOARD_KEY_STATE_PRESSED) ? "pressed" :
"released",
modifiers);
}
/**
* \brief CALLBACK function, Wayland informs about button event
* \param widget widget
* \param input input device that caused the button event
* \param time time the event happened
* \param button button
* \param state pressed or released
* \param data user data associated to the window
*/
static void
button_handler(struct widget *widget, struct input *input, uint32_t time,
uint32_t button, enum wl_pointer_button_state state, void *data)
{
struct eventdemo *e = data;
int32_t x, y;
if (!log_button)
return;
e->print_pointer_frame = true;
input_get_position(input, &x, &y);
printf("button time: %u, button: %u, state: %s, x: %d, y: %d\n",
time, button,
(state == WL_POINTER_BUTTON_STATE_PRESSED) ? "pressed" :
"released",
x, y);
}
/**
* \brief CALLBACK function, Wayland informs about axis event
* \param widget widget
* \param input input device that caused the axis event
* \param time time the event happened
* \param axis vertical or horizontal
* \param value amount of scrolling
* \param data user data associated to the widget
*/
static void
axis_handler(struct widget *widget, struct input *input, uint32_t time,
uint32_t axis, wl_fixed_t value, void *data)
{
struct eventdemo *e = data;
if (!log_axis)
return;
e->print_pointer_frame = true;
printf("axis time: %u, axis: %s, value: %f\n",
time,
axis == WL_POINTER_AXIS_VERTICAL_SCROLL ? "vertical" :
"horizontal",
wl_fixed_to_double(value));
}
static void
pointer_frame_handler(struct widget *widget, struct input *input, void *data)
{
struct eventdemo *e = data;
if (!e->print_pointer_frame)
return;
printf("pointer frame\n");
e->print_pointer_frame = false;
}
static void
axis_source_handler(struct widget *widget, struct input *input,
uint32_t source, void *data)
{
const char *axis_source;
struct eventdemo *e = data;
if (!log_axis)
return;
e->print_pointer_frame = true;
switch (source) {
case WL_POINTER_AXIS_SOURCE_WHEEL:
axis_source = "wheel";
break;
case WL_POINTER_AXIS_SOURCE_FINGER:
axis_source = "finger";
break;
case WL_POINTER_AXIS_SOURCE_CONTINUOUS:
axis_source = "continuous";
break;
default:
axis_source = "<invalid source value>";
break;
}
printf("axis source: %s\n", axis_source);
}
static void
axis_stop_handler(struct widget *widget, struct input *input,
uint32_t time, uint32_t axis,
void *data)
{
struct eventdemo *e = data;
if (!log_axis)
return;
e->print_pointer_frame = true;
printf("axis stop time: %u, axis: %s\n",
time,
axis == WL_POINTER_AXIS_VERTICAL_SCROLL ? "vertical" :
"horizontal");
}
static void
axis_discrete_handler(struct widget *widget, struct input *input,
uint32_t axis, int32_t discrete, void *data)
{
struct eventdemo *e = data;
if (!log_axis)
return;
e->print_pointer_frame = true;
printf("axis discrete axis: %u value: %d\n", axis, discrete);
}
/**
* \brief CALLBACK function, Waylands informs about pointer motion
* \param widget widget
* \param input input device that caused the motion event
* \param time time the event happened
* \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,
float x, float y, void *data)
{
struct eventdemo *e = data;
if (log_motion) {
printf("motion time: %u, x: %f, y: %f\n", time, x, y);
e->print_pointer_frame = true;
}
if (x > e->x && x < e->x + e->w)
if (y > e->y && y < e->y + e->h)
return CURSOR_HAND1;
return CURSOR_LEFT_PTR;
}
/**
* \brief Create and initialise a new eventdemo window.
* The returned eventdemo instance should be destroyed using \c eventdemo_destroy().
* \param d associated display
*/
static struct eventdemo *
eventdemo_create(struct display *d)
{
struct eventdemo *e;
e = zalloc(sizeof (struct eventdemo));
if (e == NULL)
return NULL;
e->window = window_create(d);
if (noborder) {
/* Demonstrate how to create a borderless window.
* Move windows with META + left mouse button.
*/
e->widget = window_add_widget(e->window, e);
} else {
e->widget = window_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);
/* Set the callback pointer frame handler for the window */
widget_set_pointer_frame_handler(e->widget, pointer_frame_handler);
/* Set the callback axis handler for the window */
widget_set_axis_handlers(e->widget,
axis_handler,
axis_source_handler,
axis_stop_handler,
axis_discrete_handler);
/* Initial drawing of the window */
window_schedule_resize(e->window, width, height);
return e;
}
/**
* \brief Destroy eventdemo instance previously created by \c eventdemo_create().
* \param eventdemo eventdemo instance to destroy
*/
static void eventdemo_destroy(struct eventdemo * eventdemo)
{
widget_destroy(eventdemo->widget);
window_destroy(eventdemo->window);
free(eventdemo);
}
/**
* \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-axis", 0, &log_axis },
{ 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;
if (parse_options(eventdemo_options,
ARRAY_LENGTH(eventdemo_options), &argc, argv) > 1) {
unsigned k;
printf("Usage: %s [OPTIONS]\n\n", argv[0]);
for (k = 0; k < ARRAY_LENGTH(eventdemo_options); k++) {
const struct weston_option* p = &eventdemo_options[k];
if (p->name) {
printf(" --%s", p->name);
if (p->type != WESTON_OPTION_BOOLEAN)
printf("=VALUE");
putchar('\n');
}
if (p->short_name) {
printf(" -%c", p->short_name);
if (p->type != WESTON_OPTION_BOOLEAN)
printf("VALUE");
putchar('\n');
}
}
return 1;
}
if (!log_redraw && !log_resize && !log_focus && !log_key &&
!log_button && !log_axis && !log_motion)
log_redraw = log_resize = log_focus = log_key =
log_button = log_axis = log_motion = 1;
/* Connect to the display and have the arguments parsed */
d = display_create(&argc, argv);
if (d == NULL) {
fprintf(stderr, "failed to create display: %s\n",
strerror(errno));
return -1;
}
/* Create new eventdemo window */
e = eventdemo_create(d);
if (e == NULL) {
fprintf(stderr, "failed to create eventdemo: %s\n",
strerror(errno));
return -1;
}
display_run(d);
/* Release resources */
eventdemo_destroy(e);
display_destroy(d);
return 0;
}