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don't force invalidate map widget unless moved

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* make the app-state a single-level table so we can easily
copy it and check for changes
* call invalidate_rect only if we've moved or changed orientation
This commit is contained in:
Daniel Barlow 2025-06-14 12:10:49 +01:00
parent 2406a15db9
commit ccca847e3c
1 changed files with 21 additions and 12 deletions
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33
pkgs/maps/main.fnl
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@ -86,7 +86,8 @@ label.readout {
:lon 0
:zoom 17
:course 0 ; direction of travel
:orientation {:target 0 :actual 0} ; map rotation angle from north
:orientation-target 0 ; map rotation angle from north
:orientation-actual 0 ; map rotation angle from north
:tiles {}
}
)
@ -259,7 +260,7 @@ label.readout {
(draw-onto-map-surface bounds app-state.zoom)))))
(g:translate (+ (/ viewport-width 2)) (+ (/ viewport-height 2)))
(g:rotate (* (/ (- 360 app-state.orientation.actual) 180) math.pi))
(g:rotate (* (/ (- 360 app-state.orientation-actual) 180) math.pi))
(g:translate (- (/ viewport-width 2)) (- (/ viewport-height 2)))
(g:set_source_surface map-surface (- offset-x) (- offset-y))
@ -302,7 +303,8 @@ label.readout {
(fn update-app-state [new-vals]
(let [old-bounds
(let [old-state (merge {} app-state)
old-bounds
(map-bounds app-state.lat app-state.lon app-state.zoom)]
(merge app-state new-vals)
(let [bounds
@ -311,22 +313,29 @@ label.readout {
(fetch-tiles bounds app-state.tiles app-state.zoom)
(set map-surface nil)))
(when (> (math.abs (- app-state.orientation.target app-state.course)) 20)
(set app-state.orientation.target app-state.course)
(when (> (math.abs (- app-state.orientation-target app-state.course)) 20)
(set app-state.orientation-target app-state.course)
; (-> state-widgets.rose (: :get_window) (: :invalidate_rect nil))
(set map-surface nil))
(when (not (= app-state.orientation.target app-state.orientation.actual))
(set app-state.orientation.actual
(+ app-state.orientation.actual
(* 0.05 (- app-state.orientation.target app-state.orientation.actual))))
(when (not (= app-state.orientation-target app-state.orientation-actual))
(set app-state.orientation-actual
(+ app-state.orientation-actual
(* 0.05 (- app-state.orientation-target app-state.orientation-actual))))
)
(each [name widget (pairs state-widgets)]
(case name
:speed (widget:set_label
(string.format "%.1f km/h" (* app-state.speed 3.6)))
:osm (: (widget:get_window) :invalidate_rect nil)
:osm
(when (not (and ; false
(= old-state.lat app-state.lat)
(= old-state.lon app-state.lon)
(= old-state.orientation-actual
app-state.orientation-actual)
))
(: (widget:get_window) :invalidate_rect nil))
:arrow (: (widget:get_window) :invalidate_rect nil)
:rose (: (widget:get_window) :invalidate_rect nil)
:time (widget:set_label
@ -357,7 +366,7 @@ label.readout {
(fn [self g]
(g:set_source_rgb 0.4 0.0 0.1)
(g:translate (// height 2) (// height 2))
(g:rotate (* (/ (- app-state.course app-state.orientation.actual)
(g:rotate (* (/ (- app-state.course app-state.orientation-actual)
180) math.pi))
(g:translate (// height -2) (// height -2))
(g:set_line_width 4)
@ -389,7 +398,7 @@ label.readout {
(g:stroke)
(g:translate (// height 2) (// height 2))
(g:rotate (- (deg->rad app-state.orientation.actual)))
(g:rotate (- (deg->rad app-state.orientation-actual)))
(g:translate (// height -2) (// height -2))
(g:set_line_width 2)