input remapping + mouse control

inc/system/system.input.lua

@@ -3,12 +3,9 @@ local INPUT_KEY_UP = 0
 local INPUT_KEY_DOWN = 1
 local INPUT_KEY_LEFT = 2
 local INPUT_KEY_RIGHT = 3
-local INPUT_KEY_A = 4
-local INPUT_KEY_B = 5
 local INPUT_KEY_Y = 7
 local INPUT_KEY_SPACE = 48
 local INPUT_KEY_BACKSPACE = 51
-local INPUT_KEY_ENTER = 50
 
 --- Checks if Up is pressed.
 --- @within Input
@@ -22,22 +19,9 @@ function Input.left() return btnp(INPUT_KEY_LEFT) end
 --- Checks if Right is pressed.
 --- @within Input
 function Input.right() return btnp(INPUT_KEY_RIGHT) end
---- Checks if Space is pressed.
---- @within Input
-function Input.space() return keyp(INPUT_KEY_SPACE) end
-
 --- Checks if Select is pressed.
 --- @within Input
-function Input.select() return btnp(INPUT_KEY_A) or keyp(INPUT_KEY_SPACE) end
---- Checks if Menu Confirm is pressed.
+function Input.select() return btnp(INPUT_KEY_Y) or keyp(INPUT_KEY_SPACE) or Mouse.clicked() end
+--- Checks if Back is pressed.
 --- @within Input
-function Input.menu_confirm() return btnp(INPUT_KEY_A) or keyp(INPUT_KEY_ENTER) end
---- Checks if Player Interact is pressed.
---- @within Input
-function Input.player_interact() return btnp(INPUT_KEY_B) or keyp(INPUT_KEY_ENTER) end
---- Checks if Menu Back is pressed.
---- @within Input
-function Input.menu_back() return btnp(INPUT_KEY_Y) or keyp(INPUT_KEY_BACKSPACE) end
---- Checks if Toggle Popup is pressed.
---- @within Input
-function Input.toggle_popup() return keyp(INPUT_KEY_ENTER) end
+function Input.back() return keyp(INPUT_KEY_BACKSPACE) end

inc/system/system.main.lua

@@ -17,6 +17,7 @@ end
 --- @within Main
 function TIC()
   init_game()
+  Mouse.update()
 
   local now = time()
   if Context.last_frame_time == 0 then

inc/system/system.mouse.lua

@@ -0,0 +1,43 @@
+--- @section Mouse
+local _mx, _my = 0, 0
+local _mleft, _mleft_prev = false, false
+local _consumed = false
+
+--- Updates mouse state. Call once per frame.
+--- @within Mouse
+function Mouse.update()
+  _mleft_prev = _mleft
+  _consumed = false
+  local mt = {mouse()}
+  _mx, _my, _mleft = mt[1], mt[2], mt[3]
+end
+
+--- Returns current mouse X position.
+--- @within Mouse
+function Mouse.x() return _mx end
+
+--- Returns current mouse Y position.
+--- @within Mouse
+function Mouse.y() return _my end
+
+--- Returns true if the mouse button was just pressed this frame (and not yet consumed).
+--- @within Mouse
+function Mouse.clicked() return _mleft and not _mleft_prev and not _consumed end
+
+--- Returns true if the mouse button is held down.
+--- @within Mouse
+function Mouse.held() return _mleft end
+
+--- Marks the current click as consumed so Mouse.clicked() won't fire again this frame.
+--- @within Mouse
+function Mouse.consume() _consumed = true end
+
+--- Returns true if the mouse is within the given rectangle.
+--- @within Mouse
+--- @param x number Left edge.
+--- @param y number Top edge.
+--- @param w number Width.
+--- @param h number Height.
+function Mouse.in_rect(x, y, w, h)
+  return _mx >= x and _mx < x + w and _my >= y and _my < y + h
+end

inc/system/system.ui.lua

@@ -38,8 +38,12 @@ end
 --- @within UI
 --- @param items table A table of menu items.<br/>
 --- @param selected_item number The current index of the selected item.<br/>
+--- @param[opt] x number Menu x position (required for mouse support).<br/>
+--- @param[opt] y number Menu y position (required for mouse support).<br/>
+--- @param[opt] centered boolean Whether the menu is centered horizontally.<br/>
 --- @return number selected_item The updated index of the selected item.
-function UI.update_menu(items, selected_item)
+--- @return boolean mouse_confirmed True if the user clicked on a menu item.
+function UI.update_menu(items, selected_item, x, y, centered)
   if Input.up() then
     Audio.sfx_beep()
     selected_item = selected_item - 1
@@ -53,7 +57,29 @@ function UI.update_menu(items, selected_item)
       selected_item = 1
     end
   end
-  return selected_item
+
+  if x ~= nil and y ~= nil and Mouse.clicked() then
+    local mx = Mouse.x()
+    local my = Mouse.y()
+    local menu_x = x
+    if centered then
+      local max_w = 0
+      for _, item in ipairs(items) do
+        local w = print(item.label, 0, -10, 0, false, 1, false)
+        if w > max_w then max_w = w end
+      end
+      menu_x = (Config.screen.width - max_w) / 2
+    end
+    for i, _ in ipairs(items) do
+      local item_y = y + (i - 1) * 10
+      if my >= item_y and my < item_y + 10 and mx >= menu_x - 8 then
+        Mouse.consume()
+        return i, true
+      end
+    end
+  end
+
+  return selected_item, false
 end
 
 --- Draws a bordered textbox with scrolling text.