factor/library/ui/buttons.factor

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! Copyright (C) 2005 Slava Pestov.
! See http://factor.sf.net/license.txt for BSD license.
IN: gadgets
USING: generic kernel lists math namespaces sdl ;
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: button-down? ( n -- ? )
my-hand hand-buttons contains? ;
: mouse-over? ( gadget -- ? ) my-hand hand-gadget child? ;
: button-pressed? ( button -- ? )
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#! Return true if the mouse was clicked on the button, and
#! is currently over the button.
dup mouse-over? [
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1 button-down? [
my-hand hand-clicked child?
] [
drop f
] ifte
] [
drop f
] ifte ;
: button-update ( button -- )
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dup dup button-pressed? reverse-video set-paint-property
redraw ;
: button-clicked ( button -- )
#! If the mouse is released while still inside the button,
#! fire an action gesture.
dup mouse-over? [
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[ action ] swap handle-gesture drop
] [
drop
] ifte ;
: button-actions ( button quot -- )
dupd [ action ] set-action
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dup [ dup button-update button-clicked ] [ button-up 1 ] set-action
dup [ button-update ] [ button-down 1 ] set-action
dup [ button-update ] [ mouse-leave ] set-action
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[ button-update ] [ mouse-enter ] set-action ;
: <button> ( label quot -- button )
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>r <label> line-border dup r> button-actions ;
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: <check> ( w h -- cross )
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2dup >r >r 0 0 r> r> <line> <gadget>
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>r tuck neg >r >r >r 0 r> r> r> <line> <gadget> r>
2list <stack> ;
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TUPLE: checkbox bevel selected? delegate ;
: init-checkbox-bevel ( bevel checkbox -- )
2dup set-checkbox-bevel add-gadget ;
: update-checkbox ( checkbox -- )
#! Really, there should only be one child.
dup checkbox-bevel gadget-children [ unparent ] each
dup checkbox-selected? [
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7 7 <check>
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] [
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0 0 7 7 <rectangle> <gadget>
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] ifte swap checkbox-bevel add-gadget ;
: toggle-checkbox ( checkbox -- )
dup checkbox-selected? not over set-checkbox-selected?
update-checkbox ;
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: checkbox-update ( checkbox -- )
dup button-pressed? >r checkbox-bevel r>
reverse-video set-paint-property ;
: checkbox-actions ( checkbox -- )
dup [ toggle-checkbox ] [ action ] set-action
dup [ dup checkbox-update button-clicked ] [ button-up 1 ] set-action
dup [ checkbox-update ] [ button-down 1 ] set-action
dup [ checkbox-update ] [ mouse-leave ] set-action
[ checkbox-bevel button-update ] [ mouse-enter ] set-action ;
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C: checkbox ( label -- checkbox )
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<default-shelf> over set-checkbox-delegate
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[ f line-border swap init-checkbox-bevel ] keep
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[ >r <label> r> add-gadget ] keep
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dup checkbox-actions
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dup update-checkbox ;