blob: 4f22763b77c6cb8fe78e02bfbe855c3ae835ea57 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
;;;; region.lisp
(in-package :wheelwork)
(defclass/std region ()
((left bottom top right :with :std 0)))
(defmethod width ((region region))
(- (region-right region) (region-left region)))
(defmethod (setf width) (newval (region region))
(with-slots (left right) region
(setf right (+ left newval))))
(defmethod height ((region region))
(- (region-top region) (region-bottom region)))
(defmethod (setf height) (newval (region region))
(with-slots (top bottom) region
(setf top (+ bottom newval))))
(defmethod x ((r region))
(region-left r))
(defmethod (setf x) (newval (region region))
(let ((width (width region))) ;;get before change
(with-slots (left right)
(setf left newval
right (+ newval width)))))
(defmethod y ((r region))
(region-bottom r))
(defmethod (setf y) (newval (region region))
(let ((height (height region))) ;;get before change
(with-slots (top bottom) region
(setf bottom newval
top (+ newval height)))))
|
