Release Play lanes in time selection v1.00

Tracks/edgemeal_Play lanes in time selection.lua

@@ -0,0 +1,182 @@
+-- @description Play lanes in time selection
+-- @author Edgemeal
+-- @version 1.00
+-- @link Forum Thread https://forum.cockos.com/showthread.php?t=295370
+-- @screenshot Example https://stash.reaper.fm/49429/Play%20Lanes%20v1.00.gif
+-- @donation Donate via PayPal https://www.paypal.me/Edgemeal
+-- @about
+--   Play fixed track lanes in time selection, Auto advances to next lane...
+--
+--   Requires: REAPER v7 and ReaImGui v0.9.3.1
+--   * Fixed Lane Track must have two or more lanes.
+--   * Comp lane names must start with "C" (REAPER default: C1, C2, C3, etc...).
+--   * In 'comp lane' mode, if user deletes all comps, play stops/script exits.
+--   * In 'skip comp' mode, if user deletes all non-comps, play stops/script exits.
+
+package.path = reaper.ImGui_GetBuiltinPath() .. '/?.lua'
+local ImGui = require 'imgui' '0.9.3.1'
+
+local r = reaper
+local repeatOn = r.GetToggleCommandState(1068) == 1 -- save users repeat mode setting
+local title = 'Play lanes in time selection'
+local ctx = ImGui.CreateContext(title, ImGui.ConfigFlags_NoSavedSettings)
+local start_butn_colr = 0x00FF0080 -- green
+
+local track, ui_vis, ui_open, x, y
+local play_all, skip_comps, only_comps = true, false, false
+local pp, prev_pp, lane_cnt, comp_ndx, lane = 0,0,0,0,-1
+local comps = {}
+
+function SetAction(action, state)
+  if r.GetToggleCommandState(action) == 1 ~= state then
+    r.Main_OnCommand(action, 0)
+  end
+end
+
+function ToolbarButton(enable)
+  local _, _, section_id, command_id = r.get_action_context()
+  r.SetToggleCommandState(section_id, command_id, enable)
+  r.RefreshToolbar2(section_id, command_id)
+end
+
+function GetComps()
+  local t = {}
+  for i = 0, lane_cnt-1 do
+    local retval, str = r.GetSetMediaTrackInfo_String(track, "P_LANENAME:" .. i, "", false)
+    if retval and str:sub(1,1) == "C" then t[#t+1] = i end
+  end
+  return t
+end
+
+function NextNonComp(curlane)
+  for i = curlane, lane_cnt-1 do
+    local retval, str = r.GetSetMediaTrackInfo_String(track, "P_LANENAME:" .. i, "", false)
+    if retval and str:sub(1,1) ~= "C" then return i end
+  end
+  return -1
+end
+
+function PlayLanes()
+  track = r.GetSelectedTrack(0,0)
+  if track == nil then return end
+  if (r.GetPlayState() & 1 == 1) then
+    pp = r.GetPlayPosition2()
+    if pp < prev_pp then
+      lane_cnt = r.GetMediaTrackInfo_Value(track, "I_NUMFIXEDLANES")
+      if lane_cnt < 2 then return end
+      lane=lane+1 if lane > lane_cnt-1 then lane = 0 end
+      if only_comps then comps = GetComps() if #comps == 0 then return end end
+      if only_comps and #comps > 0 then
+        comp_ndx=comp_ndx+1 if comp_ndx > #comps then comp_ndx = 1 end
+        lane = comps[comp_ndx]
+      elseif skip_comps and #comps > 0 then
+        local n = NextNonComp(lane)
+        if n == -1 and (lane_cnt-#comps < 1) then return end
+        while n == -1 do lane=lane+1 if lane > lane_cnt-1 then lane = 0 end
+          n = NextNonComp(lane)
+        end
+        lane = n
+      end
+      r.SetMediaTrackInfo_Value(track, "C_LANEPLAYS:" .. lane, 1)
+    end
+    r.defer(PlayLanes)
+    prev_pp = pp
+  end
+end
+
+function Int_Lane()
+  for i = 0, lane_cnt-1 do
+   local n = r.GetMediaTrackInfo_Value(track, "C_LANEPLAYS:" .. i, 1)
+   if n~=0 then return i-1 end
+  end
+  return -1
+end
+
+function Int_Comp(curlane)
+  local val = 0
+  for i = 1, #comps do
+    if comps[i] >= curlane then
+      val=i-1 if val < 0 then val = 0 end
+      break
+    end
+  end
+  return val
+end
+
+function ImGui_Loop()
+  ImGui.SetNextWindowPos(ctx, x, y, ImGui.Cond_FirstUseEver, 0.5, 0.5) -- center window @ mouse pos.
+  ui_vis, ui_open = ImGui.Begin(ctx, title, true, ImGui.WindowFlags_TopMost | ImGui.WindowFlags_NoResize | ImGui.WindowFlags_NoMove | ImGui.WindowFlags_NoCollapse )
+  if ui_vis then
+    -- play_all_lanes
+    if ImGui.RadioButton(ctx,"Play all lanes", play_all) then
+      play_all = true
+      skip_comps = false
+      only_comps = false
+    end
+    -- skip_comp_lanes
+    if ImGui.RadioButton(ctx,"Skip comp lanes", skip_comps) then
+      skip_comps = true
+      play_all = false
+      only_comps = false
+    end
+    -- play_only_comp_lanes
+    if ImGui.RadioButton(ctx,"Play only comps", only_comps) then
+      only_comps = true
+      play_all  = false
+      skip_comps = false
+    end
+    -- start button
+    ImGui.NewLine(ctx)
+    ImGui.PushStyleColor(ctx, ImGui.Col_Button, start_butn_colr)
+    start_butn_colr = 0x404040FF -- gray
+
+    track = r.GetSelectedTrack(0,0)
+    if track then
+      lane_cnt = r.GetMediaTrackInfo_Value(track, "I_NUMFIXEDLANES")
+      comps = GetComps()
+    end
+
+    local s_time, e_time = r.GetSet_LoopTimeRange(false, false, 0, 0, false)
+    if s_time == e_time then
+      ImGui.Button(ctx, "No Time Selection", 220, 24)
+    elseif track == nil then
+      ImGui.Button(ctx, "No track selected", 220, 24)
+    elseif track and r.GetMediaTrackInfo_Value(track, 'I_FREEMODE') ~= 2 then
+      ImGui.Button(ctx, "Not a fixed lane track", 220, 24)
+    elseif track and lane_cnt < 2 then
+      ImGui.Button(ctx, "Only one lane", 220, 24)
+    elseif track and only_comps and #comps == 0 then
+      ImGui.Button(ctx, "No comp lanes", 220, 24)
+    else
+      start_butn_colr = 0x00FF0080 -- green
+      if ImGui.Button(ctx, "Start", 220, 24) then
+        lane = Int_Lane()          -- selected lane
+        comp_ndx = Int_Comp(lane+1)-- selected/next comp
+        ui_open = false            -- close UI
+        r.Main_OnCommand(1016, 0)  -- Transport: Stop
+        ToolbarButton(1)           -- highlight toolbar button
+        r.Main_OnCommand(40630, 0) -- Go to start of time selection
+        SetAction(1068,true)       -- Enable Repeat
+        r.Main_OnCommand(40044, 0) -- Transport: Play (/stop)
+        _, prev_pp = r.GetSet_LoopTimeRange(false, false, 0, 0, false)
+        r.defer(PlayLanes)
+      end
+    end
+
+    ImGui.PopStyleColor(ctx, 1)
+    ImGui.End(ctx)  -- ui done --
+  end
+  if ui_open then r.defer(ImGui_Loop) end
+end
+
+-- exit
+function Exit()
+  r.Main_OnCommand(1016, 0) -- Transport: Stop
+  SetAction(1068,repeatOn)  -- restore user repeat mode setting
+  ToolbarButton(0)          -- unhighlight toolbar button
+end
+r.atexit(Exit)
+
+-- get mouse pos (app will be centered @ mouse)
+x, y = r.GetMousePosition()
+r.defer(ImGui_Loop)