Implement charge meter.

src/kani.lua

@@ -4,6 +4,7 @@ import "CoreLibs/graphics"
 import "CoreLibs/sprites"
 import "CoreLibs/timer"
 import "bullet"
+import "ui"
 
 local gfx <const> = playdate.graphics
 
@@ -20,7 +21,7 @@ local MAX_CHARGE <const> = 100
 
 class("Kani").extends(gfx.sprite)
 
-function Kani:init()
+function Kani:init(ui)
    local img = gfx.image.new("images/kani.png")
    Kani.super.init(self, img)
    print(self)
@@ -33,6 +34,9 @@ function Kani:init()
    self.weaponPower = 0
    self.firingMode = false
 
+   -- the UI gets passed in to Kani so that we can update pieces of it easily.
+   self.ui = ui
+
    -- input handlers
    self.inputHandlers = {
       upButtonDown =    function() self.vector.y = -1 end,
@@ -54,7 +58,7 @@ end
 function Kani:chargeReserve(change)
    if change < 0 then return end
    self.reserveCharge = math.min(self.reserveCharge + change / 15, 100)
-   print("Reserve charge at " .. self.reserveCharge)
+   self.ui.chargeMeter:setValue(self.reserveCharge)
 end
 
 function Kani:chargeShot()
@@ -66,6 +70,7 @@ function Kani:chargeShot()
       self.reserveCharge -= requiredPower
       self.weaponPower += 1
       print("Shot charged to size " .. self.weaponPower)
+      self.ui.chargeMeter:setValue(self.reserveCharge)
    end
 end