clients/confine: Use pointer confinement to confine drawed line
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>
diff --git a/clients/confine.c b/clients/confine.c
index 17503b3..95e0bdc 100644
--- a/clients/confine.c
+++ b/clients/confine.c
@@ -25,6 +25,7 @@
#include "config.h"
+#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
@@ -60,6 +61,8 @@
struct input *cursor_timeout_input;
int cursor_timeout_fd;
struct task cursor_timeout_task;
+
+ bool pointer_confined;
};
static void
@@ -193,6 +196,34 @@
}
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)
{
const long cursor_timeout = 500;
@@ -256,6 +287,14 @@
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 @@
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);