uxn/projects/examples/devices/mouse.usm

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( dev/mouse )
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%RTN { JMP2r }
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%ABS2 { DUP2 #000f SFT2 EQU #04 JCN #ffff MUL2 }
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%LTS2 { #8000 ADD2 SWP2 #8000 ADD2 GTH2 }
%GTS2 { #8000 ADD2 SWP2 #8000 ADD2 LTH2 }
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( devices )
|00 @System [ &vector $2 &pad $6 &r $2 &g $2 &b $2 ]
|20 @Screen [ &vector $2 &width $2 &height $2 &pad $2 &x $2 &y $2 &addr $2 &color $1 ]
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|90 @Mouse [ &vector $2 &x $2 &y $2 &state $1 &chord $1 ]
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|0000
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@color $1
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@line [ &x0 $2 &y0 $2 &x $2 &y $2 &sx $2 &sy $2 &dx $2 &dy $2 &e1 $2 &e2 $2 ]
@pointer [ &x $2 &y $2 &lastx $2 &lasty $2 &state $1 ]
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( program )
|0100 ( -> )
( theme )
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#f030 .System/r DEO2
#f04f .System/g DEO2
#f050 .System/b DEO2
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( vectors )
;on-mouse .Mouse/vector DEO2
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BRK
@on-mouse ( -> )
;draw-cursor JSR2
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( on down )
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.Mouse/state DEI #00 NEQ .pointer/state LDZ #00 EQU #0101 EQU2 ,on-mouse-down JCN
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( on drag )
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.Mouse/state DEI #00 NEQ ,on-mouse-drag JCN
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.Mouse/state DEI .pointer/state STZ
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BRK
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@on-mouse-down ( -> )
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( record start position )
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.Mouse/x DEI2 DUP2 .pointer/x STZ2 .pointer/lastx STZ2
.Mouse/y DEI2 DUP2 .pointer/y STZ2 .pointer/lasty STZ2
.Mouse/state DEI .pointer/state STZ
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BRK
@on-mouse-drag ( -> )
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( draw line )
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.pointer/lastx LDZ2
.pointer/lasty LDZ2
.pointer/x LDZ2
.pointer/y LDZ2
#01 [ .Mouse/state DEI #10 EQU #02 MUL ADD ]
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;draw-line JSR2
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( record last position )
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.Mouse/x DEI2 .pointer/lastx STZ2
.Mouse/y DEI2 .pointer/lasty STZ2
.Mouse/state DEI .pointer/state STZ
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BRK
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@draw-cursor ( -- )
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;pointer_icn .Screen/addr DEO2
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( clear last cursor )
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.pointer/x LDZ2 .Screen/x DEO2
.pointer/y LDZ2 .Screen/y DEO2
#30 .Screen/color DEO
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( record pointer positions )
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.Mouse/x DEI2 .pointer/x STZ2
.Mouse/y DEI2 .pointer/y STZ2
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( draw new cursor )
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.pointer/x LDZ2 .Screen/x DEO2
.pointer/y LDZ2 .Screen/y DEO2
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#33 .Mouse/state DEI #00 NEQ #02 MUL SUB .Screen/color DEO
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RTN
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@draw-line ( x1 y1 x2 y2 color -- )
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( load ) .color STZ .line/y0 STZ2 .line/x0 STZ2 .line/y STZ2 .line/x STZ2
.line/x0 LDZ2 .line/x LDZ2 SUB2 ABS2 .line/dx STZ2
.line/y0 LDZ2 .line/y LDZ2 SUB2 ABS2 #0000 SWP2 SUB2 .line/dy STZ2
#ffff #00 .line/x LDZ2 .line/x0 LDZ2 LTS2 #0002 MUL2 ADD2 .line/sx STZ2
#ffff #00 .line/y LDZ2 .line/y0 LDZ2 LTS2 #0002 MUL2 ADD2 .line/sy STZ2
.line/dx LDZ2 .line/dy LDZ2 ADD2 .line/e1 STZ2
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&loop
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.line/x LDZ2 .Screen/x DEO2
.line/y LDZ2 .Screen/y DEO2
.color LDZ .Screen/color DEO
[ .line/x LDZ2 .line/x0 LDZ2 EQU2 ]
[ .line/y LDZ2 .line/y0 LDZ2 EQU2 ] #0101 EQU2 ,&end JCN
.line/e1 LDZ2 #0002 MUL2 .line/e2 STZ2
.line/e2 LDZ2 .line/dy LDZ2 LTS2 ,&skipy JCN
.line/e1 LDZ2 .line/dy LDZ2 ADD2 .line/e1 STZ2
.line/x LDZ2 .line/sx LDZ2 ADD2 .line/x STZ2
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&skipy
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.line/e2 LDZ2 .line/dx LDZ2 GTS2 ,&skipx JCN
.line/e1 LDZ2 .line/dx LDZ2 ADD2 .line/e1 STZ2
.line/y LDZ2 .line/sy LDZ2 ADD2 .line/y STZ2
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&skipx
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;&loop JMP2
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&end
RTN
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@pointer_icn [ 80c0 e0f0 f8e0 1000 ]