add bpm slider

graph.lua

@@ -37,7 +37,7 @@ function self.update(dt)
   local mx, my = love.mouse.getPosition()
 
   if not (love.mouse.isDown(1) and mx > x and mx < x + w and my > y and my < y + h) then
-    timer = (timer + dt) % 2
+    timer = (timer + dt * (slider.kvalue('bpm')/120)) % 2
   else
     timer = mix(timer, (mx - x) / w, dt * 14)
   end

slider.lua

@@ -29,6 +29,9 @@ local function insertSlider(tab, f)
   f.oldvalue = (self.kget(f.name) or {oldvalue = f.value}).oldvalue
   f.spintimer = (self.kget(f.name) or {spintimer = 0}).spintimer
   f.spin = (self.kget(f.name) or {spin = 0}).spin
+  if f.snap then
+    f.value = math.floor(f.value / f.snap) * f.snap
+  end
   return table.insert(tab, f)
 end
 function self.createSliders()
@@ -47,6 +50,19 @@ function self.createSliders()
       displayname = 'Mix'
     })
   end
+  if mode == 1 or mode == 2 then -- bpm slider
+    insertSlider(s, {
+      x = outerpadding,
+      y = love.graphics.getHeight() - outerpadding - fontHeight * 3 - padding,
+      width = dropdownWidth,
+      min = 80,
+      max = 220,
+      default = 120,
+      name = 'bpm',
+      displayname = 'BPM',
+      snap = 1,
+    })
+  end
 
   local ease1 = ease.eases[dropdown.kselected('ease1')]
   local ease2 = ease.eases[dropdown.kselected('ease2')]