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(boot.rom) Scrolling support

This commit is contained in:
neauoire 2021-11-27 11:38:12 -08:00
parent 71e8177657
commit 6ff202a23c
1 changed files with 44 additions and 3 deletions
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47
projects/software/boot.tal
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@ -99,8 +99,8 @@ BRK
#41 .Mouse/state DEI #01 = + .Screen/sprite DEO
( select choice )
.Mouse/y DEI2
10// NIP #01 - ;select-file JSR2
.Mouse/y DEI2 .browser/y LDZ2 --
10// NIP ;select-file JSR2
.Mouse/state DEI #00 = ,&no-click JCN
.browser/sel LDZ ;run-file JSR2
@ -180,6 +180,8 @@ RTN
POP RTN
&has-changed
DUP ;scroll-browser JSR2
.browser/x LDZ2 #0018 -- .browser/y LDZ2 [ .browser/sel LDZ TOS 10** ++ ]
#0010 #0010
;hand-icn #00 ;draw-icn JSR2
@ -201,6 +203,29 @@ RTN
RTN
( Scroll the browser to accomodate off-screen line items )
@scroll-browser ( id -- )
( Check whether the selection moved up or down )
.browser/last LDZ OVR SWP SUB #80 AND ,&negative JCN
&positive ( The selection moved down )
( Calculate the id currently at the bottom of the screen )
.Screen/height DEI2 .browser/y LDZ2 #0010 ++ -- 10// NIP
GTH ,&scroll-up JCN [ RTN ]
&scroll-up
.browser/y LDZ2k #0010 -- ROT STZ2
RTN
&negative ( The selection moved up )
( Calculate the id currently at the top of the screen )
( TODO make a macro constant for y initial pos )
#0010 .browser/y LDZ2 -- 10// NIP
LTH ,&scroll-down JCN [ RTN ]
&scroll-down
.browser/y LDZ2k #0010 ++ ROT STZ2 ( Decrement y by 0x10 )
RTN
@run-file ( id -- )
SEL-ENTRY LDA2
@ -236,11 +261,13 @@ RTN
.browser/y LDZ2 .Screen/y DEO2
SEL-ENTRY ;dir/entries
&outer ( selected-entry* this-entry* )
.Screen/y DEI2 #0010 LTH2 ,&inc JCN ( Don't draw anything in the first row )
EQU2k #0c * #01 + STH
LDA2k ORAk #00 = ,&end JCN
,&clear JSR
STHr ,&draw-one JSR
.browser/x LDZ2 .Screen/x DEO2
.Screen/y DEI2 #0010 ++ .Screen/y DEO2
&inc .Screen/y DEI2 #0010 ++ .Screen/y DEO2
INC2 INC2 ,&outer JMP
&end
POP2 POP2 POP2 POPr
@ -261,6 +288,20 @@ RTN
POP2 POPr
RTN
&clear ( -- )
.Screen/x DEI2k ( Stash the current x pos )
#ff00
&clear-loop
#00 .Screen/sprite DEO
.Screen/y DEI2k #0008 ++ ROT DEO2
#00 .Screen/sprite DEO
.Screen/y DEI2k #0008 -- ROT DEO2
.Screen/x DEI2k #0008 ++ ROT DEO2
INC NEQk ,&clear-loop JCN
POP2
ROT DEO2
RTN
@draw-time ( -- )
.DateTime/day DEI