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clients/confine: Use pointer confinement to confine drawed line

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Use pointer confinement to make the line drawing not go outside the
drawing area. It is toggled with the letf pointer button.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Jonas Ådahl 2014-11-26 17:47:29 +08:00
parent 61831f42c6
commit fdeb2bb928
1 changed files with 43 additions and 0 deletions
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43
clients/confine.c
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@ -25,6 +25,7 @@
#include "config.h"
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
@ -60,6 +61,8 @@ struct confine {
struct input *cursor_timeout_input;
int cursor_timeout_fd;
struct task cursor_timeout_task;
bool pointer_confined;
};
static void
@ -192,6 +195,34 @@ key_handler(struct window *window, struct input *input, uint32_t time,
}
}
static void
toggle_pointer_confine(struct confine *confine, struct input *input)
{
if (confine->pointer_confined) {
window_unconfine_pointer(confine->window);
} else {
window_confine_pointer_to_widget(confine->window,
confine->widget,
input);
}
confine->pointer_confined = !confine->pointer_confined;
}
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 confine *confine = data;
bool is_pressed = state == WL_POINTER_BUTTON_STATE_PRESSED;
if (is_pressed && button == BTN_LEFT)
toggle_pointer_confine(confine, input);
widget_schedule_redraw(widget);
}
static void
cursor_timeout_reset(struct confine *confine)
{
@ -256,6 +287,14 @@ cursor_timeout_func(struct task *task, uint32_t events)
CURSOR_LEFT_PTR);
}
static void
pointer_unconfined(struct window *window, struct input *input, void *data)
{
struct confine *confine = data;
confine->pointer_confined = false;
}
static struct confine *
confine_create(struct display *display)
{
@ -272,8 +311,12 @@ confine_create(struct display *display)
window_set_user_data(confine->window, confine);
window_set_keyboard_focus_handler(confine->window,
keyboard_focus_handler);
window_set_pointer_confined_handler(confine->window,
NULL,
pointer_unconfined);
widget_set_redraw_handler(confine->widget, redraw_handler);
widget_set_button_handler(confine->widget, button_handler);
widget_set_motion_handler(confine->widget, motion_handler);
widget_set_resize_handler(confine->widget, resize_handler);
widget_set_leave_handler(confine->widget, leave_handler);