Make Clock class with draggable hand

clock.lua

@@ -1,35 +1,127 @@
 local MAX_SECONDS = 60 * 60 * 12
 
+local Time = {}
+Time.__index = Time
+
+function Time:new(hour, minute)
+  local t = {
+    hour = (hour or 12),
+    minute = (minute or 0)
+  }
+  return setmetatable(t, self)
+end
+
+function Time:getHour()
+  return self.hour
+end
+
+function Time:getMinute()
+  return self.minute
+end
+
+function Time:fmt()
+  return string.format("%2d:%02d", self.hour, self.minute)
+end
+
+
 local Hand = {}
 Hand.__index = Hand
 
-function Hand:new(length, color, sec_per_turn, ticks_per_turn)
+function Hand:new(length, color)
   local h = {
     length = (length or 10),
     color = (color or {1,1,1}),
-    sec_per_turn = (sec_per_turn or 1),
-    ticks_per_turn = ticks_per_turn
+    turns = 0
   }
   return setmetatable(h, self)
 end
 
-local function handTransform(sec_elapsed)
-  local turns = sec_elapsed / self.sec_per_turn
-  if self.ticks_per_turn then
-    turns = math.floor(turns * self.ticks_per_turn) / self.ticks_per_turn
-  end
-  return love.math.newTransform(0, 0, 2 * math.pi * turns)
+function Hand:setTurns(turns)
+  self.turns = turns
 end
 
-function Hand:draw(sec_elapsed)
-  local turns = sec_elapsed / self.sec_per_turn
-  if self.ticks_per_turn then
-    turns = math.floor(turns * self.ticks_per_turn) / self.ticks_per_turn
+function Hand:getTurns()
+  return self.turns
 end
+
+function Hand:draw()
+--  local turns = sec_elapsed / self.sec_per_turn
+--  if self.ticks_per_turn then
+--    turns = math.floor(turns * self.ticks_per_turn) / self.ticks_per_turn
+--  end
   love.graphics.push("all")
-  love.graphics.applyTransform(handTransform(sec_elapsed))
   love.graphics.setColor(unpack(self.color))
+  love.graphics.rotate(2 * math.pi * (self.turns + 0.25))
   love.graphics.rectangle("fill", -10, 10, 20, -self.length)
   love.graphics.pop()
 end
 
+
+local Clock = {}
+Clock.__index = Clock
+
+function Clock:new(time, diameter, transform)
+  local c = {
+    time = (time or Time:new()),
+    minuteHand = Hand:new(240, {1,0,0}, 60*60),
+    dragging = false,
+    transform = transform or love.math.newTransform(),
+    radius = diameter and diameter/2 or 300
+  }
+  return setmetatable(c, self)
+end
+
+function Clock:setTime(time)
+  self.time = time
+end
+
+function Clock:getTime()
+  return self.time
+end
+
+function Clock:draw()
+  -- debug
+  love.graphics.print(self.minuteHand:getTurns(), 10, 50)
+  -- end debug
+  
+  love.graphics.push("all")
+  love.graphics.applyTransform(self.transform)
+  love.graphics.setColor(0.5, 0.5, 0.5)
+  love.graphics.circle("fill", 0, 0, self.radius)
+  self.minuteHand:draw()
+  love.graphics.pop()
+end
+
+local function clockContainsPoint(clock, x, y)
+  local localX, localY = clock.transform:inverseTransformPoint(x, y)
+  local dist = math.sqrt(localX^2 + localY^2)
+  return dist <= clock.radius
+end
+
+local function clockPointAt(clock, x, y)
+  local localX, localY = clock.transform:inverseTransformPoint(x, y)
+  local turns = math.atan2(localY, localX) / 2 / math.pi
+  clock.minuteHand:setTurns(turns)
+end
+
+function Clock:movemouse(x, y)
+  if self.dragging then
+    local localX, localY = self.transform:inverseTransformPoint(x, y)
+    clockPointAt(self, x, y)
+    -- TODO update clock hands
+  end
+end
+
+function Clock:pressmouse(x, y, button)
+  if not self.dragging and button == 1 and clockContainsPoint(self, x,y) then
+    self.dragging = true
+    clockPointAt(self, x, y)
+    -- TODO update clock hands
+  end
+end
+
+function Clock:releasemouse(button)
+  if button == 1 then self.dragging = false end
+end
+
+return Clock

main.lua

@@ -1,77 +1,86 @@
-local MAX_SECONDS = 60 * 60 * 12
+--local MAX_SECONDS = 60 * 60 * 12
 
-local Hand = {}
-Hand.__index = Hand
+--local Hand = {}
+--Hand.__index = Hand
 
-function Hand:new(length, color, sec_per_turn, ticks_per_turn)
-  local h = {
-    length = (length or 10),
-    color = (color or {1,1,1}),
-    sec_per_turn = (sec_per_turn or 1),
-    ticks_per_turn = ticks_per_turn
-  }
-  return setmetatable(h, self)
+--function Hand:new(length, color, sec_per_turn, ticks_per_turn)
+--  local h = {
+--    length = (length or 10),
+--    color = (color or {1,1,1}),
+--    sec_per_turn = (sec_per_turn or 1),
+--    ticks_per_turn = ticks_per_turn
+--  }
+--  return setmetatable(h, self)
+--end
+
+--function Hand:draw(sec_elapsed)
+--  local turns = sec_elapsed / self.sec_per_turn
+--  if self.ticks_per_turn then
+--    turns = math.floor(turns * self.ticks_per_turn) / self.ticks_per_turn
+--  end
+--  love.graphics.push("all")
+--  love.graphics.setColor(unpack(self.color))
+--  love.graphics.rotate(2 * math.pi * turns)
+--  love.graphics.rectangle("fill", -10, 10, 20, -self.length)
+--  love.graphics.pop()
+--end
+
+--local clock = {rawseconds = 0, speedup = 120}
+
+--function clock:advance(dt)
+--  self.rawseconds = self.rawseconds + dt * self.speedup
+--  if self.rawseconds >= MAX_SECONDS then
+--    self.rawseconds = self.rawseconds - MAX_SECONDS
+--  end
+--end
+
+--function clock:getHour()
+--  local h = math.floor(self.rawseconds / 60 / 60 % 12)
+--  if h == 0 then
+--    h = 12
+--  end
+--  return h
+--end
+
+--function clock:getMinute()
+--  return math.floor(self.rawseconds / 60 % 60)
+--end
+
+--function clock:getSecond()
+--  return math.floor(self.rawseconds % 60)
+--end
+
+--function clock:fmt()
+--  return string.format("%2d:%02d:%02d", self:getHour(), self:getMinute(), self:getSecond())
+--end
+
+--local secondhand = Hand:new(300, {0.5,0.5,0}, 60, 60)
+--local minutehand = Hand:new(240, {1,0,0}, 60*60)
+--local hourhand = Hand:new(180, {0,0.5,0.5}, 60*60*12)
+
+-- New stuff:
+local Clock = require"clock"
+local clockTransform = love.math.newTransform(love.graphics.getWidth()/2, love.graphics.getHeight()/2)
+local clock = Clock:new(nil, 400, clockTransform)
+
+function love.mousemoved(x, y, dx, dy, istouch)
+  clock:movemouse(x, y)
 end
 
-function Hand:draw(sec_elapsed)
-  local turns = sec_elapsed / self.sec_per_turn
-  if self.ticks_per_turn then
-    turns = math.floor(turns * self.ticks_per_turn) / self.ticks_per_turn
-  end
-  love.graphics.push("all")
-  love.graphics.setColor(unpack(self.color))
-  love.graphics.rotate(2 * math.pi * turns)
-  love.graphics.rectangle("fill", -10, 10, 20, -self.length)
-  love.graphics.pop()
+-- todo mousepressed & mousereleased
+function love.mousepressed(x, y, button, istouch, presses)
+  clock:pressmouse(x, y, button)
 end
 
-local clock = {rawseconds = 0, speedup = 120}
-
-function clock:advance(dt)
-  self.rawseconds = self.rawseconds + dt * self.speedup
-  if self.rawseconds >= MAX_SECONDS then
-    self.rawseconds = self.rawseconds - MAX_SECONDS
+function love.mousereleased(x, y, button, istouch, presses)
+  clock:releasemouse(button)
 end
-end
-
-function clock:getHour()
-  local h = math.floor(self.rawseconds / 60 / 60 % 12)
-  if h == 0 then
-    h = 12
-  end
-  return h
-end
-
-function clock:getMinute()
-  return math.floor(self.rawseconds / 60 % 60)
-end
-
-function clock:getSecond()
-  return math.floor(self.rawseconds % 60)
-end
-
-function clock:fmt()
-  return string.format("%2d:%02d:%02d", self:getHour(), self:getMinute(), self:getSecond())
-end
-
-local secondhand = Hand:new(300, {0.5,0.5,0}, 60, 60)
-local minutehand = Hand:new(240, {1,0,0}, 60*60)
-local hourhand = Hand:new(180, {0,0.5,0.5}, 60*60*12)
 
 function love.load()
   love.graphics.setBackgroundColor(0,0,0)
 end
 
-function love.update(dt)
-  clock:advance(dt)
-end
-
 function love.draw()
-  love.graphics.print(clock:fmt())
-  love.graphics.print(math.floor(clock.rawseconds), 10, 50)
-  
-  love.graphics.translate(love.graphics.getWidth()/2, love.graphics.getHeight()/2)
-  secondhand:draw(clock.rawseconds)
-  minutehand:draw(clock.rawseconds)
-  hourhand:draw(clock.rawseconds)
+  love.graphics.print(clock:getTime():fmt())
+  clock:draw()
 end