gesture handling

modules/InputEvent.lua

@@ -1,18 +1,21 @@
 ---@class InputEvent
----@field type "click"|"press"|"release"|"rightclick"|"middleclick"|"drag"
+---@field type "click"|"press"|"release"|"rightclick"|"middleclick"|"drag"|"touchpress"|"touchmove"|"touchrelease"|"touchcancel"
 ---@field button number -- Mouse button: 1 (left), 2 (right), 3 (middle)
----@field x number -- Mouse X position
----@field y number -- Mouse Y position
----@field dx number? -- Delta X from drag start (only for drag events)
----@field dy number? -- Delta Y from drag start (only for drag events)
+---@field x number -- Mouse/Touch X position
+---@field y number -- Mouse/Touch Y position
+---@field dx number? -- Delta X from drag/touch start (only for drag/touch events)
+---@field dy number? -- Delta Y from drag/touch start (only for drag/touch events)
 ---@field modifiers {shift:boolean, ctrl:boolean, alt:boolean, super:boolean}
 ---@field clickCount number -- Number of clicks (for double/triple click detection)
 ---@field timestamp number -- Time when event occurred
+---@field touchId string? -- Touch identifier (for multi-touch)
+---@field pressure number? -- Touch pressure (0-1, defaults to 1.0)
+---@field phase string? -- Touch phase: "began", "moved", "ended", "cancelled"
 local InputEvent = {}
 InputEvent.__index = InputEvent
 
 ---@class InputEventProps
----@field type "click"|"press"|"release"|"rightclick"|"middleclick"|"drag"
+---@field type "click"|"press"|"release"|"rightclick"|"middleclick"|"drag"|"touchpress"|"touchmove"|"touchrelease"|"touchcancel"
 ---@field button number
 ---@field x number
 ---@field y number
@@ -21,6 +24,9 @@ InputEvent.__index = InputEvent
 ---@field modifiers {shift:boolean, ctrl:boolean, alt:boolean, super:boolean}
 ---@field clickCount number?
 ---@field timestamp number?
+---@field touchId string?
+---@field pressure number?
+---@field phase string?
 
 --- Create a new input event
 ---@param props InputEventProps
@@ -36,7 +42,47 @@ function InputEvent.new(props)
   self.modifiers = props.modifiers
   self.clickCount = props.clickCount or 1
   self.timestamp = props.timestamp or love.timer.getTime()
+  
+  -- Touch-specific properties
+  self.touchId = props.touchId
+  self.pressure = props.pressure or 1.0
+  self.phase = props.phase
+  
   return self
 end
 
+--- Create an InputEvent from LÖVE touch data
+---@param id userdata Touch ID from LÖVE
+---@param x number Touch X position
+---@param y number Touch Y position
+---@param phase string Touch phase: "began", "moved", "ended", "cancelled"
+---@param pressure number? Touch pressure (0-1, defaults to 1.0)
+---@return InputEvent
+function InputEvent.fromTouch(id, x, y, phase, pressure)
+  local touchIdStr = tostring(id)
+  local eventType = "touchpress"
+  if phase == "moved" then
+    eventType = "touchmove"
+  elseif phase == "ended" then
+    eventType = "touchrelease"
+  elseif phase == "cancelled" then
+    eventType = "touchcancel"
+  end
+  
+  return InputEvent.new({
+    type = eventType,
+    button = 1, -- Treat touch as left button
+    x = x,
+    y = y,
+    dx = 0,
+    dy = 0,
+    modifiers = {shift = false, ctrl = false, alt = false, super = false},
+    clickCount = 1,
+    timestamp = love.timer.getTime(),
+    touchId = touchIdStr,
+    pressure = pressure or 1.0,
+    phase = phase,
+  })
+end
+
 return InputEvent