initial commit

src/ui/ChoiceBox.lua

@@ -0,0 +1,50 @@
+-- YES/NO choice box (top-left of the text box area, like the original).
+
+local Font = require("src.render.Font")
+
+local ChoiceBox = {}
+ChoiceBox.__index = ChoiceBox
+
+local CURSOR = 0xED
+
+function ChoiceBox.new(game, onChoose, opts)
+  local self = setmetatable({}, ChoiceBox)
+  self.game = game
+  self.onChoose = onChoose
+  -- some of the original's prompts start on NO (e.g. release)
+  self.index = (opts and opts.defaultNo) and 2 or 1
+  -- BIT_NO_MENU_BUTTON_SOUND: PC-session prompts stay silent
+  self.noSound = (opts and opts.noSound) or false
+  return self
+end
+
+function ChoiceBox:update(dt)
+  local input = self.game.input
+  if input:wasPressed("up") or input:wasPressed("down") then
+    self.index = self.index == 1 and 2 or 1
+  elseif input:wasPressed("a") then
+    -- HandleMenuInput_ (home/window.asm): SFX_PRESS_AB on A and B alike
+    if not self.noSound then
+      require("src.core.Sound").play(self.game.data, "Press_AB")
+    end
+    self.game.stack:pop()
+    self.onChoose(self.index == 1)
+  elseif input:wasPressed("b") then
+    if not self.noSound then
+      require("src.core.Sound").play(self.game.data, "Press_AB")
+    end
+    self.game.stack:pop()
+    self.onChoose(false)
+  end
+end
+
+function ChoiceBox:draw()
+  Font.drawBox(0, 7, 6, 5)
+  love.graphics.setColor(0, 0, 0, 1)
+  Font.draw("YES", 16, 8 * 8)
+  Font.draw("NO", 16, 10 * 8)
+  Font.drawCode(CURSOR, 8, (self.index == 1 and 8 or 10) * 8)
+  love.graphics.setColor(1, 1, 1, 1)
+end
+
+return ChoiceBox