factor/library/ui/layouts.factor

169 lines
4.7 KiB
Factor

! Copyright (C) 2005, 2006 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
USING: errors generic hashtables kernel math
namespaces queues sequences ;
IN: gadgets
DEFER: relayout-1
: invalidate ( gadget -- )
\ relayout-1 swap set-gadget-state ;
: forget-pref-dim ( gadget -- ) f swap set-gadget-pref-dim ;
: invalid ( -- queue ) \ invalid get-global ;
: add-invalid ( gadget -- )
#! When unit testing gadgets without the UI running, the
#! invalid queue is not initialized and we simply ignore
#! invalidation requests.
invalid [ enque ] [ drop ] if* ;
DEFER: relayout
: invalidate* ( gadget -- )
\ relayout over set-gadget-state
dup forget-pref-dim
dup gadget-root?
[ add-invalid ] [ gadget-parent [ relayout ] when* ] if ;
: relayout ( gadget -- )
#! Relayout and redraw a gadget and its parent before the
#! next iteration of the event loop. Should be used when the
#! gadget's size has potentially changed. See relayout-1.
dup gadget-state \ relayout eq?
[ drop ] [ invalidate* ] if ;
: relayout-1 ( gadget -- )
#! Relayout and redraw a gadget before the next iteration of
#! the event loop. Should be used if the gadget should be
#! repainted, or if its internal layout changed, but its
#! preferred size did not change.
dup gadget-state
[ drop ] [ dup invalidate add-invalid ] if ;
: show-gadget t swap set-gadget-visible? ;
: hide-gadget f swap set-gadget-visible? ;
: (set-rect-dim) ( dim gadget quot -- )
>r 2dup rect-dim =
[ [ 2drop ] [ set-rect-dim ] if ] 2keep
[ drop ] r> if ; inline
: set-layout-dim ( dim gadget -- )
#! Can only be used inside layout*.
[ invalidate ] (set-rect-dim) ;
: set-gadget-dim ( dim gadget -- )
[ invalidate* ] (set-rect-dim) ;
GENERIC: pref-dim* ( gadget -- dim )
: ?set-gadget-pref-dim ( dim gadget -- )
dup gadget-state [ 2drop ] [ set-gadget-pref-dim ] if ;
: pref-dim ( gadget -- dim )
#! Do not cache the pref-dim if it is potentially invalid.
dup gadget-pref-dim [ ] [
[ pref-dim* dup ] keep ?set-gadget-pref-dim
] ?if ;
M: gadget pref-dim* rect-dim ;
GENERIC: layout* ( gadget -- )
M: gadget layout* drop ;
: prefer ( gadget -- ) dup pref-dim swap set-layout-dim ;
DEFER: layout
: layout-children ( gadget -- ) [ layout ] each-child ;
: layout ( gadget -- )
#! Position the children of the gadget inside the gadget.
#! Note that nothing is done if the gadget does not need to
#! be laid out.
dup gadget-state [
f over set-gadget-state
dup layout* dup layout-children
] when drop ;
TUPLE: pack align fill gap ;
: pref-dims ( gadget -- list ) [ pref-dim ] map ;
: orient ( gadget seq1 seq2 -- seq )
>r >r gadget-orientation r> r> [ pick set-axis ] 2map nip ;
: packed-dim-2 ( gadget sizes -- list )
[ over rect-dim over v- rot pack-fill v*n v+ ] map-with ;
: packed-dims ( gadget sizes -- seq )
2dup packed-dim-2 swap orient ;
: gap-locs ( gap sizes -- seq )
{ 0 0 } [ v+ over v+ ] accumulate 2nip ;
: aligned-locs ( gadget sizes -- seq )
[ >r dup pack-align swap rect-dim r> v- n*v ] map-with ;
: packed-locs ( gadget sizes -- seq )
over pack-gap over gap-locs >r dupd aligned-locs r> orient ;
: round-dims ( seq -- newseq )
{ 0 0 } swap
[ swap v- dup [ ceiling ] map [ swap v- ] keep ] map nip ;
: pack-layout ( gadget sizes -- )
round-dims over gadget-children
>r dupd packed-dims r> 2dup [ set-layout-dim ] 2each
>r packed-locs r> [ set-rect-loc ] 2each ;
C: pack ( vector -- pack )
#! gap: between each child.
#! fill: 0 leaves default width, 1 fills to pack width.
#! align: 0 left, 1/2 center, 1 right.
dup delegate>gadget
[ set-gadget-orientation ] keep
0 over set-pack-align
0 over set-pack-fill
{ 0 0 } over set-pack-gap ;
: delegate>pack ( vector tuple -- ) >r <pack> r> set-delegate ;
: <pile> ( -- pack ) { 0 1 } <pack> ;
: <shelf> ( -- pack ) { 1 0 } <pack> ;
: dim-sum ( seq -- dim ) { 0 0 } [ v+ ] reduce ;
: gap-dims ( gap sizes -- seeq )
[ dim-sum ] keep length 1 [-] rot n*v v+ ;
: pack-pref-dim ( gadget sizes -- dim )
over pack-gap over gap-dims >r max-dim r>
rot gadget-orientation set-axis ;
M: pack pref-dim*
dup gadget-children pref-dims pack-pref-dim ;
M: pack layout*
dup gadget-children pref-dims pack-layout ;
: fast-children-on ( dim axis gadgets -- i )
swapd [ rect-loc v- over v. ] binsearch nip ;
M: pack children-on
dup gadget-orientation swap gadget-children [
3dup
>r >r dup rect-loc swap rect-dim v+ origin get v-
r> r> fast-children-on 1+
>r
>r >r rect-loc origin get v-
r> r> fast-children-on
0 max
r>
] keep <slice> ;