uxn/projects/examples/dev.mouse.usm

( dev/mouse )

%RTN { JMP2r }
%8+ { #0008 ADD2 }
%++ { #0001 ADD2 }
%-- { #0001 SUB2 }
%ABS2 { DUP2 #000f SFT2 EQU #04 JNZ #ffff MUL2 }

(
%%^ { .% PEK } %%= { .% POK }
%%? { .% DEI } %%! { .% DEO }
)

%%^ { .% PEK2 } %%= { .% POK2 }
%%? { .% DEI2 } %%! { .% DEO2 }

( devices )

|00 @System     [ &vector $2 &pad     $6 &r      $2 &g     $2 &b      $2 ]
|10 @Console    [ &pad    $8 &char    $1 &byte   $1 &short $2 &string $2 ]
|20 @Screen     [ &vector $2 &width   $2 &height $2 &pad   $2 &x      $2 &y     $2 &addr $2 &color $1 ]
|40 @Controller [ &vector $2 &button  $1 &key    $1 ]
|60 @Mouse      [ &vector $2 &x       $2 &y      $2 &state $1 &chord $1 ]

|0000

@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 ]
@color $1

( program )

|0100 ( -> )

	( theme ) 
	#f0f0 System/r! 
	#f00f System/g! 
	#f000 System/b!

	( vectors ) 
	;on-mouse Mouse/vector!

BRK

@on-mouse ( -> )

	;draw-cursor JSR2

	( on down )
	.Mouse/state DEI #00 NEQ .pointer/state PEK #00 EQU #0101 EQU2 ,on-mouse-down JNZ

	( on drag )
	.Mouse/state DEI #00 NEQ ,on-mouse-drag JNZ

	.Mouse/state DEI .pointer/state POK

BRK 

@on-mouse-down ( -> )

	( record start position )
	Mouse/x? DUP2 pointer/x= pointer/lastx= 
	Mouse/y? DUP2 pointer/y= pointer/lasty=

	.Mouse/state DEI .pointer/state POK

BRK

@on-mouse-drag ( -> )
	
	( draw line )
	pointer/lastx^ 
	pointer/lasty^ 
	pointer/x^ 
	pointer/y^ 
	#01 ( add mouse state ) [ .Mouse/state DEI #10 EQU #02 MUL ADD ] 
	;draw-line JSR2

	( record last position )
	Mouse/x? pointer/lastx= 
	Mouse/y? pointer/lasty=

	.Mouse/state DEI .pointer/state POK

BRK

@draw-cursor ( -- )
	
	( clear last cursor )
	;clear Screen/addr! 
	pointer/x^ Screen/x! 
	pointer/y^ Screen/y! 
	#30 .Screen/color DEO

	( record pointer positions )
	Mouse/x? pointer/x= 
	Mouse/y? pointer/y=

	( draw new cursor )
	;cursor Screen/addr! 
	pointer/x^ Screen/x! 
	pointer/y^ Screen/y! 

	( colorize on state )
	.Mouse/state DEI #00 NEQ
	#31 ADD .Screen/color DEO

RTN

@draw-line ( x1 y1 x2 y2 color -- )
	
	( load ) .color POK line/y0= line/x0= line/y= line/x=
	line/x0^ line/x^ SUB2 ABS2 line/dx=
	line/y0^ line/y^ SUB2 ABS2 #0000 SWP2 SUB2 line/dy=
	#ffff #00 line/x^ line/x0^ LTS2 #0002 MUL2 ADD2 line/sx= 
	#ffff #00 line/y^ line/y0^ LTS2 #0002 MUL2 ADD2 line/sy= 
	line/dx^ line/dy^ ADD2 line/e1=
	&loop
		( draw ) 
		line/x^ Screen/x! 
		line/y^ Screen/y! 
		.color PEK 
		.Screen/color DEO
		line/x^ line/x0^ EQU2 line/y^ line/y0^ EQU2 #0101 EQU2 ,&end JNZ
		line/e1^ #0002 MUL2 line/e2=
		line/e2^ line/dy^ LTS2 ,&skipy JNZ
			line/e1^ line/dy^ ADD2 line/e1=
			line/x^ line/sx^ ADD2 line/x=
		&skipy
		line/e2^ line/dx^ GTS2 ,&skipx JNZ
			line/e1^ line/dx^ ADD2 line/e1=
			line/y^ line/sy^ ADD2 line/y=
		&skipx
		,&loop JMP
	&end

RTN

@clear [ 0000 0000 0000 0000 ]
@cursor [ 80c0 e0f0 f8e0 1000 ]