How to get and set coordinates of a floating fx?

[amagalma]

Hello!

How can I get the coordinates of a floating fx window? And how can I set them? (so that I place the floating fx somewhere else on screen - preferably centered on the screen)

Thanks!

[cfillion]

GetTrackStateChunk, some string parsing and manipulation then SetTrackStateChunk.

Quick and dirty example:

local PATTERN = 'FLOAT' .. (' (%d+)'):rep(4)

local t = reaper.GetTrack(0, 0)
local ok, chunk = reaper.GetTrackStateChunk(t, '')
if not ok then return end

local x, y, w, h = chunk:match(PATTERN)
reaper.ShowConsoleMsg(string.format("was: position = %dx%d, size = %dx%d\n", x, y, w, h))

chunk = chunk:gsub(PATTERN, 'FLOAT 10, 10, 300, 300')
reaper.SetTrackStateChunk(t, chunk)

[amagalma]

Thank you so much cfillion!!

It works perfect!

[amagalma]

And another question..

Is there any way to know if an FX belonging to a track is floating (focused or not), by other means than getting the track's chunk?

Edit.. Found it!

[amagalma]

Here is my code:

function NoUndoPoint() end
local reaper = reaper

function Main()
    local track = reaper.GetSelectedTrack(0, 0)
    local fxcount = reaper.TrackFX_GetCount(track)
    if fxcount == 0 then
        reaper.Main_OnCommand(40291,0) -- add FX
        reaper.TrackFX_Show(track, 0, 0) -- Hide FX Chain
    else
        local t = {}
        local nextfx = 0
        for i = 0, fxcount-1 do -- Find the first open FX, if any
            local open = reaper.TrackFX_GetOpen(track, i)
            if open then t[#t+1] = i end
        end
        if #t ~= 0 then nextfx = t[1]+1 end
        if nextfx == fxcount then nextfx = 0 end
        reaper.TrackFX_Show(track, nextfx, 3) -- Show "next" FX
        for i,v in ipairs(t) do -- Close other open FX
            if tonumber(v) ~= tonumber(nextfx) then reaper.TrackFX_Show(track, v, 2) end
        end
        reaper.TrackFX_Show(track, 0, 0) -- Hide FX Chain
        local PATTERN = "FLOAT" .. (" (%d+)"):rep(4)
        local ok, chunk = reaper.GetTrackStateChunk(track, "")
        if not ok then return end
        local plx, ply, plw, plh = chunk:match(PATTERN) -- Get FX window position & size
        local _, _, scrw, scrh = reaper.my_getViewport(0, 0, plw, plh, 0, 0, plw, plh, 1) -- Get screen size
        local x, y = math.floor((scrw - plw)/2), math.floor((scrh - plh)/2) -- Centered FX on screen coordinates
        if tonumber(plx) ~= x and tonumber(ply) ~= y then -- Center FX if not centered
            local chunk = chunk:gsub(PATTERN, "FLOAT "..x..", "..y..", "..plw..", "..plh)
            reaper.SetTrackStateChunk(track, chunk)
        end
    end
    reaper.UpdateArrange()
end

reaper.PreventUIRefresh(1)
Main()
reaper.PreventUIRefresh(-1)
reaper.defer(NoUndoPoint)

Why an undo point is created? What should I do to avoid it?

I went into the trouble of making this action in order to avoid the undo point created with the SWS action "Float next FX (and close others) for selected tracks", and no luck..

[me2beats]

Originally Posted by amagalma

Why an undo point is created? What should I do to avoid it?

Hi, I did not really go into it, but it's probably because of

 reaper.Main_OnCommand(40291,0) -- add FX

[nofish]

Yes, as me2beats said, creating undo point seems unavoidable currently when using native actions.

http://forum.cockos.com/showthread.php?t=192670

[amagalma]

I want an undo point to be added if I add an FX.. There is no problem with that part. The problem is when cycling between existing FX.
The action that creates the problem is reaper.TrackFX_Show(track, v, 2)

Just try the code and see

[me2beats]

Originally Posted by amagalma

I want an undo point to be added if I add an FX.. There is no problem with that part. The problem is when cycling between existing FX.
The action that creates the problem is reaper.TrackFX_Show(track, v, 2)

Just try the code and see

try this:

local r = reaper
local tr = r.GetSelectedTrack(0,0)
r.Undo_BeginBlock()
r.TrackFX_Show(tr, 0, 2) -- hide 1st fx
r.Undo_EndBlock('script name', 1)

Undo point is not created here, so I think the problem isn't in TrackFX_Show()

[amagalma]

It is created as it should.. 'script name'

If I do this:

function Main()
    reaper.Undo_BeginBlock()
    local track = reaper.GetSelectedTrack(0, 0)
    local fxcount = reaper.TrackFX_GetCount(track)
    if fxcount == 0 then
        reaper.Main_OnCommand(40291,0) -- add FX
        reaper.TrackFX_Show(track, 0, 0) -- Hide FX Chain
    else
        local t = {}
        local nextfx = 0
        for i = 0, fxcount-1 do -- Find the first open FX, if any
            local open = reaper.TrackFX_GetOpen(track, i)
            if open then t[#t+1] = i end
        end
        if #t ~= 0 then nextfx = t[1]+1 end
        if nextfx == fxcount then nextfx = 0 end
        reaper.TrackFX_Show(track, nextfx, 3) -- Show "next" FX
        for i,v in ipairs(t) do -- Close other open FX
            if tonumber(v) ~= tonumber(nextfx) then reaper.TrackFX_Show(track, v, 2) end
        end
        reaper.TrackFX_Show(track, 0, 0) -- Hide FX Chain
        local PATTERN = "FLOAT" .. (" (%d+)"):rep(4)
        local ok, chunk = reaper.GetTrackStateChunk(track, "")
        if not ok then return end
        local plx, ply, plw, plh = chunk:match(PATTERN) -- Get FX window position & size
        local _, _, scrw, scrh = reaper.my_getViewport(0, 0, plw, plh, 0, 0, plw, plh, 1) -- Get screen size
        local x, y = math.floor((scrw - plw)/2), math.floor((scrh - plh)/2) -- Centered FX on screen coordinates
        if tonumber(plx) ~= x and tonumber(ply) ~= y then -- Center FX if not centered
            local chunk = chunk:gsub(PATTERN, "FLOAT "..x..", "..y..", "..plw..", "..plh)
            reaper.SetTrackStateChunk(track, chunk)
        end
    end
    reaper.UpdateArrange()
    reaper.Undo_EndBlock("next fx", 1)
end

reaper.PreventUIRefresh(1)
Main()
reaper.PreventUIRefresh(-1)

then an undo point is created as expected.. But I do not want to do that.. I want no undo point at all when cycling between FX

[me2beats]

Originally Posted by amagalma

It is created as it should.. 'script name'

http://imgur.com/a/vkmak

[amagalma]

Thanks for getting into the trouble!

You have only one FX loaded in the chain.. Try with more and see

[me2beats]

Originally Posted by amagalma

Thanks for getting into the trouble!

You have only one FX loaded in the chain.. Try with more and see

reaper.TrackFX_Show(track, 0, 2)

if you cooment it the script will not create undo points.

there are several API functions with same issue (they clutter Undo history)
for example CSurf_OnPlayRateChange() and TrackFX_SetParam().

As far as I know, there is no alternative - it's impossible to close FX even via track chunk

[amagalma]

Yes...

I tried to do it with track chunk, but it was not possible. Setting SHOW 0 and FLOAT to FLOATPOS in the chunk, didn't do anything..