window: Replace widget focus handler with a enter/leave handler pair
diff --git a/clients/window.h b/clients/window.h
index 483ed20..df453ef 100644
--- a/clients/window.h
+++ b/clients/window.h
@@ -194,10 +194,14 @@
 				      struct input *input,
 				      int32_t x, int32_t y, void *data);
 
-typedef void (*widget_focus_handler_t)(struct widget *widget, void *data);
-
 typedef void (*window_close_handler_t)(struct window *window, void *data);
 
+typedef void (*widget_enter_handler_t)(struct widget *widget,
+				       struct input *input, uint32_t time,
+				       int32_t x, int32_t y, void *data);
+typedef void (*widget_leave_handler_t)(struct widget *widget,
+				       struct input *input, void *data);
+
 struct window *
 window_create(struct display *display, int32_t width, int32_t height);
 struct window *
@@ -362,8 +366,11 @@
 widget_get_user_data(struct widget *widget);
 
 void
-widget_set_focus_handler(struct widget *widget,
-			 widget_focus_handler_t handler);
+widget_set_enter_handler(struct widget *widget,
+			 widget_enter_handler_t handler);
+void
+widget_set_leave_handler(struct widget *widget,
+			 widget_leave_handler_t handler);
 
 void
 widget_schedule_redraw(struct widget *widget);