! Copyright (C) 2005, 2006 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
IN: gadgets
USING: errors freetype gadgets-frames generic hashtables kernel
math namespaces opengl sequences ;

! The world gadget is the top level gadget that all (visible)
! gadgets are contained in. There is one world per top-level
! native window.

! fonts: mapping font tuples to sprite vectors
! handle: native resource
! loc: location of native window on the screen.
!   we don't store this in the world's rect-loc, since the
!   co-ordinate system might be different, and generally the
!   UI code assumes that everything starts at { 0 0 0 }.
TUPLE: world gadget status focus focused? fonts handle loc ;

: free-fonts ( world -- )
    dup world-handle select-gl-context
    world-fonts hash-values [ free-sprites ] each ;

: font-sprites ( font world -- sprites )
    world-fonts [ drop V{ } clone ] cache ;

DEFER: request-focus

C: world ( gadget status -- world )
    {
        { [ ] set-world-status @bottom }
        { [ ] set-world-gadget @center }
    } make-frame*
    t over set-gadget-root?
    H{ } clone over set-world-fonts
    dup world-gadget request-focus
    { 0 0 0 } over set-world-loc ;

: find-world [ world? ] find-parent ;

M: world pref-dim* ( world -- dim )
    delegate pref-dim* { 1024 768 0 } vmin ;

: focused-ancestors ( world -- seq )
    world-focus parents <reversed> ;

: draw-string ( open-fonts string -- )
    >r dup world get font-sprites r> (draw-string) ;