How to make mixer window scroll to show selected track?

[SeanBlake]

Hi,

I wrote a simple reascript that selects a track based on it's name. The idea is to have pre-assigned buttons on my controller to jump to certain tracks in order to more easily navigate the project: drum, bass, instrument, verse, hook and bridge.

I threw in RPR_Main_OnCommand(40913, 0) after selecting the track, which scrolls the track window vertically to show the currently selected track. Unfortunately, I can't find an equivalent for the mixer window.

My current workaround is to click on the track after it has been selected. Is there a way to build this into the reascript?

Here's my current script if anyone's interested:

trackCount = RPR_CountTracks(0)

for i in range(trackCount):
	trackId = RPR_GetTrack(0, i)
	trackName = str(RPR_GetSetMediaTrackInfo_String(trackId, "P_NAME", "", 0)[3])
	
	if "bass" in trackName:
		RPR_SetTrackSelected(trackId, 1)
		
	else:
		RPR_SetTrackSelected(trackId, 0) #if it isn't the track we want, de-select it
		
RPR_Main_OnCommand(40913, 0) #scroll track window vertically to show selected track

Thanks

[nofish]

Hi,

can't help with scripting, but I thought maybe it's just a matter of activating this:



This menue comes up when clicking here:



At last the mixer tracks do scroll into view here when selected from the track window with this option activated.

[foxAsteria]

wow your first post is a script?? took me 5 years to grow the balls to try scripting. of course it wasn't nearly as scary as i though, but still...

[FnA]

This works for me. I made max left/right versions for another user and he said there was a problem that didn't occur on my computer/monitors setup. IDK. It's eel.

//mixer scroll first selected

ct = CountTracks(0);
i = 0;
while(i < ct)(
  trk = GetTrack(0, i);
  IsTrackSelected(trk) ? (
    IsTrackVisible(trk, 1) ? (
      SetMixerScroll(trk);
      i = ct;
    );
  );
  i += 1;
);

Undo_OnStateChange("mixer scroll first selected");

[SeanBlake]

nofish: Thanks! That was the first thing I checked but it was already enabled.

PooFox: Yup! Scripting is a big part of what drew me to Reaper in the first place.

FnA: That script is awesome. It works like a charm.

Now I have a new problem. I can't call reascript commands from inside my script. I can call any other command in Reaper including my C++ extension's command but anything Reascript is a no-go.

As a workaround, I made a macro that executes my script, then FnA's. Good enough for my purposes.

Solved! Thanks

[FnA]

I think that might be just python and eel mixtures. Maybe.

[daxliniere]

Originally Posted by FnA

I think that might be just python and eel mixtures. Maybe.

Yes, the two can't interbreed.

[FnA]

:/



lol

[Vampire TNA]

Hi guys!
Any idea why both scripts don't work for me?

For SeanBlake's script i get:
Find Sends.lua:4: function arguments expected near '='

For FnA's script i get:
mixer scroll first selected.lua:4: ')' expected (to close '(' at line 3) near '='

Thanks in advance for any replies

[FnA]

SeanBlake's script is in the Python language. First you would need Python installed. You would save as:
ScriptName.py

Mine is in Eel. Does not require any install. Reaper is ready to use it. You would save it as:
ScriptName.eel

I would write it like this nowadays:

//mixer scroll first selected.eel

cst = CountSelectedTracks(0);
i = 0;
while(i < cst)(
  trk = GetSelectedTrack(0, i);
  IsTrackVisible(trk, 1) ? (
    SetMixerScroll(trk);
    i = cst;
  );
  i += 1;
);

function noundo() (abs(0));
defer("noundo()");

[Vampire TNA]

Thanks for the reply FnA!
I managed to run those at last...

[Triode]

Originally Posted by FnA

I would write it like this nowadays:

Is it also possible to make the selected track scroll to the center of the mixer view (rather than the left or right edge) ?

[FnA]

As far as I know, there is
GetMixerScroll, which can tell you the leftmost track,
and
SetMixerScroll, which takes a track as an argument and tries to put that in the leftmost position.

Those are the only two dedicated functions as far as I know. There has been some recent development of new window handling functions by juliansader that may have some ability in the way you mention, but I personally don’t have them mastered to the extent to know that for sure.

[Triode]

Ok thank you.
I guess I was hoping there was a way of adding a number to the code to modify "left" to "middle" (trying to sound like i vaguely know how to code). Normally there's another unselected track near the selected one that gets put just out of view if it's on the left.

[Meo-Ada Mespotine]

Originally Posted by FnA

There has been some recent development of new window handling functions by juliansader that may have some ability in the way you mention, but I personally don’t have them mastered to the extent to know that for sure.

Yes, there are, I toyed around with them successfully, and if I remember, it's the functions JS_Window_GetScrollInfo and JS_Window_SetScrollPos.

See in this thread for the extension: https://forum.cockos.com/showthread.php?t=212174

[todoublez]

Originally Posted by Triode

Is it also possible to make the selected track scroll to the center of the mixer view (rather than the left or right edge) ?

Mine is still showing selected track at right.
Is it possible to make it center now ?

[daxliniere]

Yes, it would be wonderful to have a set of scripts for:

Scroll mixer to first selected track, left aligned
Scroll mixer to first selected track, centre aligned
Scroll mixer to first selected track, right aligned

The centre aligned version (and maybe right aligned?) would require the user to write the 'width' of their mixer into the script. For example, with my default layout on my secondary monitor, I have 24 tracks visible. The script would then be able to calculate that the track minus 12 (half of total tracks visible) should be the left-most track displayed in the mixer.

[Joe90]

Originally Posted by daxliniere

Yes, it would be wonderful to have a set of scripts for:

Scroll mixer to first selected track, left aligned
Scroll mixer to first selected track, centre aligned
Scroll mixer to first selected track, right aligned

The centre aligned version (and maybe right aligned?) would require the user to write the 'width' of their mixer into the script. For example, with my default layout on my secondary monitor, I have 24 tracks visible. The script would then be able to calculate that the track minus 12 (half of total tracks visible) should be the left-most track displayed in the mixer.

+1 on this. Would be nice. Although it would still be nice to have it as a preferences option too, so that whenever the mixer auto-scrolls to a selected track it always places it in the centre. Perhaps a constantly running script could 'intercept' this function and correct the track position in the mixer whenever it auto-scrolls - I don't know.

[daxliniere]

Originally Posted by daxliniere

Yes, it would be wonderful to have a set of scripts for:

Scroll mixer to first selected track, left aligned
Scroll mixer to first selected track, centre aligned
Scroll mixer to first selected track, right aligned

The centre aligned version (and maybe right aligned?) would require the user to write the 'width' of their mixer into the script. For example, with my default layout on my secondary monitor, I have 24 tracks visible. The script would then be able to calculate that the track minus 12 (half of total tracks visible) should be the left-most track displayed in the mixer.

Bump?

[Triode]

Hey Dax, I switch the window set to get to the mixer (on the same monitor)

I have this switching via a cycle action that includes "SWS save current track selection" and then four "go to next track" commands followed by"restore saved track selection" in the same macro. This puts selected tracks in the last third to the right on the mixer if there are enough tracks to fill the screen. It's a kludge but it works

I did this as I was finding that if I have a number of tracks selected only the first selected track was visible on the switch to mixer with the usual "scroll to view when tracks activated" set to on.

[daxliniere]

Hey Triode! Thanks for the suggestion. As you mentioned, it's a kludge, but I guess it'll do the trick until we manage to get this to work. (I still don't understand what's so hard about it. I mean, hell, we've got scripts that directly edit WAV files and others that generate complex GUIs, but scroll to selected track?? It's kinda funny. )

[Triode]

Yeah I managed to write a script the other day using JulianSader's API that scrolls the arrange to selected track when you fit tracks vertically (only if they don't all fit in)

With the mixer there is no native command that scrolls by a track's width so even if it's possible to measure the mixer window in pixels with the API that's still only halfway there and the actual scroll would need doing by the script too. Who knows - maybe it's possible!

[todoublez]

Originally Posted by Edgemeal

You can get window/client sizes with Julian's extension, GetRect , GetClientRect.

Was just playing around, really have no use for anything like this, but maybe it'll give ya some ideas, or what not to do!

-- Center selected track in Mixer
-- Requires: REAPER v6.x, js_ReaScriptAPI and Multiple rows disabled in Mixer.

function Main()
  local sel_track = reaper.GetSelectedTrack(0,0)
  if sel_track ~= nil then
    local track_number = reaper.CSurf_TrackToID(sel_track, true)
    local mixer = reaper.JS_Window_Find("Mixer", true)
    if mixer then
      local retval, list = reaper.JS_Window_ListAllChild(mixer)
      for adr in list:gmatch("[^,]+") do -- get child with no title (not 'master').
        local hwnd = reaper.JS_Window_HandleFromAddress(adr)
        if reaper.JS_Window_GetTitle(hwnd) == '' then container = hwnd break end
      end
      if container then
        local track_width = reaper.GetMediaTrackInfo_Value(sel_track, 'I_MCPW')
        local _,left,_,right,_ = reaper.JS_Window_GetClientRect(container)
        local mixer_width = (right-left)
        local _, pos = reaper.JS_Window_GetScrollInfo(container, "SB_HORZ")
        local hVal = (track_width * (track_number-1)) - (mixer_width / 2)
        if pos < hVal then newpos = pos + (hVal - pos) else newpos = pos - (pos - hVal) end
        if newpos < 0 then newpos = 0 end
        reaper.JS_Window_SetScrollPos(container, "SB_HORZ", math.floor(newpos))
      end
    end
  end
end

Main()
reaper.defer(function () end)

Just tried the code on my Mac,
it didnt work :/
but it makes selected track from right to left.

[Triode]

Thanks very much for this, Edge
I tried it and I’m also on Mac (High Sierra) and it worked for me.
Toduublez, you need the JS API installed via reapack. Have you got that?

[Joe90]

Working for me too, Edgemeal to the rescue once again... thanks!

Anyway know of a convenient way to make this centering function intercept the normal mixer scroll to selected track, so that this script forces the mixer to ALWAYS center on the selected track automatically?

[Triode]

Originally Posted by Joe90

Working for me too, Edgemeal to the rescue once again... thanks!

Anyway know of a convenient way to make this centering function intercept the normal mixer scroll to selected track, so that this script forces the mixer to ALWAYS center on the selected track automatically?

How do you normally switch to the mixer view? Have you tried putting it in a macro along with that?
Or a toggle macro via the cycle editor?
(I think it already overrides the normal mixer scroll)

[Joe90]

Originally Posted by Triode

How do you normally switch to the mixer view? Have you tried putting it in a macro along with that?
Or a toggle macro via the cycle editor?
(I think it already overrides the normal mixer scroll)

I have the mixer permanently open in a second monitor, so I guess I would need a script that is running constantly, and intercepts mixer scrolling whenever I select a track.

[Triode]

Originally Posted by Joe90

I have the mixer permanently open in a second monitor, so I guess I would need a script that is running constantly, and intercepts mixer scrolling whenever I select a track.

I see.
Another option would be add it to whatever you have the mouse modifier set to for "track" single click. Then when you click a blank space on a track in the arrange window you could trigger it that way.

[Joe90]

Originally Posted by Triode

I see.
Another option would be add it to whatever you have the mouse modifier set to for "track" single click. Then when you click a blank space on a track in the arrange window you could trigger it that way.

That would work... smart idea. I guess I could also attach it to my up/down arrows, which I use to select next/previous track. It would be still be nice if there were a way to intercept the normal mixer scrolling to selected track though, and just make it center the track instead.

The problem is, if it's sometimes appearing centered and sometimes not (like when I just select the TCP) then it's probably only going to add to the confusion, and the whole point of this centering function (For me at least) was to make sure the selected track always falls in the same place on the mixer, so your eye is not always searching at opposite ends checking where it is.

Having said all that, my most common method of track selection is by either selecting an item (I have lokasenna's 'track selection follows item selection' running all the time) or by ctrl-clicking on the empty track space. Both of these actions I can attach the script to, so your suggestion is still very helpful. Thanks.

[todoublez]

Originally Posted by Triode

Thanks very much for this, Edge
I tried it and I’m also on Mac (High Sierra) and it worked for me.
Toduublez, you need the JS API installed via reapack. Have you got that?

Yes, my Js API version is v0.998
Assigned the script to a hot key: cmd opt ctrl + x
I select a track from TCP 1st
Then I call out the MCP
It’s at right edge of the MCP which is normal by default.
And then I activate the script via hot key I assigned.
It didn’t make the selected track scroll to center,
But it scroll the track to the left edge of the MCP.

And then the script seemed start working in background,
Whenever I select a track in MCP , it scrolls to the left automatically.
Is it normal ? I think I missed something here :/

[spk77]

This seems to work too:

(Note: better window detection and error handling code should be added)

function scroll_to_track(track_id, relative_x_pos)
  relative_x_pos = relative_x_pos or 0 -- 0=left, 0.5=center, 1=right etc.
  if not reaper.IsTrackVisible(track_id, true) then
    return
  end
  local mcp_x = reaper.GetMediaTrackInfo_Value(track_id, "I_MCPX")
  local mcp_w = reaper.GetMediaTrackInfo_Value(track_id, "I_MCPW")
  local mixer_id, is_docked = reaper.BR_Win32_GetMixerHwnd()
  local mcp_id = reaper.JS_Window_FindChild(mixer_id, "", true)
  local ok, pos, page, min, max, trackPos = reaper.JS_Window_GetScrollInfo(mcp_id, "h")
  if ok then
    ok = reaper.JS_Window_SetScrollPos(mcp_id, "h", mcp_x + pos - math.floor(relative_x_pos*(page-mcp_w) + 0.5))
  end
end


local tr = reaper.GetSelectedTrack(0, 0)
if tr then
  scroll_to_track(tr, 1) -- 0=left, 0.5=center, 1=right etc.
end

[Edgemeal]

Originally Posted by spk77

This seems to work too:

Awesome! Only tried center but seems to work perfect!
I delete my crappy code!

[Triode]

Don't forget often there are a number of tracks selected and to get them all in the centre I added a small change to Edgemeaal's code shown below.
Edge, your first script got a perfectly centred result for me. The second version is off centre by one extra track on the right here.

Thanks again everyone for looking in to this

-- Center selected track in Mixer
-- Requires: REAPER v6.x, js_ReaScriptAPI, Multiple rows disabled in Mixer.

function Main()

local NumberOfTracks = reaper.CountSelectedTracks(0) / 2 -- gets added later

  local sel_track = reaper.GetSelectedTrack(0,0)
  if sel_track == nil then return end
  if not reaper.IsTrackVisible(sel_track, true) then return end
  local mixer = reaper.JS_Window_Find("Mixer", true)
  if not mixer then return end
  local retval, list = reaper.JS_Window_ListAllChild(mixer)
  for adr in list:gmatch("[^,]+") do -- get child with horiz scrollbar.
    local hwnd = reaper.JS_Window_HandleFromAddress(adr)
    local retval = reaper.JS_Window_GetScrollInfo(hwnd, "SB_HORZ") 
    if retval then container = hwnd break end
  end
  if container then
    local _,left,_,right,_ = reaper.JS_Window_GetClientRect(container)
    local mixer_width = (right-left) 
    local track_width = reaper.GetMediaTrackInfo_Value(sel_track, 'I_MCPW')
    local track_number = reaper.CSurf_TrackToID(sel_track, true)
    local _, pos = reaper.JS_Window_GetScrollInfo(container, "SB_HORZ")
    local hVal = (track_width * (track_number+NumberOfTracks-1)) - (mixer_width / 2 - (track_width / 2))
    if pos < hVal then newpos = pos + (hVal - pos) else newpos = pos - (pos - hVal) end
    if newpos < 0 then newpos = 0 end
    reaper.JS_Window_SetScrollPos(container, "SB_HORZ", math.floor(newpos))
  end
end

Main()
reaper.defer(function () end)

[Edgemeal]

Originally Posted by Triode

Edge, your first script got a perfectly centred result for me. The second version is off centre by one extra track on the right here.

I think spk77 has it covered , bowing out, have fun!

[todoublez]

Originally Posted by spk77

Hi SPK77,
this code wrks perfect for me
to me ,0.6 is center in my case, maybe it's becuz I don't show Master track in MCP.
thank u very much !!!

I just noticed that the position parameter 0,0.5,1 if u want to make it center (0.5)
it might need to be adjust to 0.6 or 0.7 to make it center.
it depends on what theme u use.
I'm using Albert-C's protoolsX on my mac, it needs to be configure to 0.6 to make it perfect center which is at the bottom of the code here.

local tr = reaper.GetSelectedTrack(0, 0)
if tr then
  scroll_to_track(tr, 0.6) -- 0=left, 0.5=center, 1=right etc.
end

[Miscreant]

Hey everyone--I'm new to scripts. Can anyone tell me where I import this script into Reaper? I'm not sure how to do that yet.

[Sound asleep]

Originally Posted by FnA

SeanBlake's script is in the Python language. First you would need Python installed. You would save as:
ScriptName.py

Mine is in Eel. Does not require any install. Reaper is ready to use it. You would save it as:
ScriptName.eel

I would write it like this nowadays:

//mixer scroll first selected.eel

cst = CountSelectedTracks(0);
i = 0;
while(i < cst)(
  trk = GetSelectedTrack(0, i);
  IsTrackVisible(trk, 1) ? (
    SetMixerScroll(trk);
    i = cst;
  );
  i += 1;
);

function noundo() (abs(0));
defer("noundo()");

Thank you, this was useful to me for my inspector setup.