js_ReaScriptAPI extension

[Dafarkias]

Originally Posted by juliansader

This is actually already possible, using the existing API. For example, to get item position, get the track y position as in this code above, and then get the item position inside the track using GetMediaItemInfo_Value with I_LASTY, I_LASTH, F_FREEMODE_Y and F_FREEMODE_H.

That is very cool, wow, thank you.

I assume in order to get the edit-cursor's 'x' position one would simply get the x/y position of the arrange view window, and then use arrange view start/end time positions to calculate the edit-cursor's 'x' position?

Sorry to bother you with such a simplistic question, I've just wanted to add features to several scripts that use screen coordinate capabilities, and I think that being able to screen-coordinate the edit-cursor and item positions would really help me in this.

[ADD., 7/1/19]

This seems to work okay:

function get_EC_x(EC_time_pos)
  
  local x, y = reaper.JS_Window_ClientToScreen(  reaper.JS_Window_Find( "trackview", 1 ), 0, 0 )
  local retval, w, h = reaper.JS_Window_GetClientSize( reaper.JS_Window_Find( "trackview", 1 ) )
  local AV_a, AV_z = reaper.GetSet_ArrangeView2( 0, 0, 0, 0 )
  local AV_w = AV_z - AV_a 
  local AV_w_EC_pos = EC_time_pos - AV_a         
  
  return (math.floor(w/(AV_w/AV_w_EC_pos)) + x)

end

[Meo-Ada Mespotine]

Originally Posted by juliansader

This is actually already possible, using the existing API. For example, to get item position, get the track y position as in this code above, and then get the item position inside the track using GetMediaItemInfo_Value with I_LASTY, I_LASTH, F_FREEMODE_Y and F_FREEMODE_H.

Oooh...that's nice! Will add that to my Ultraschall-API!

@Dafarkias
Could this help you as well?
https://mespotin.uber.space/Ultrasch...tItemFromPoint

[juliansader]

Originally Posted by Dafarkias

I assume in order to get the edit-cursor's 'x' position one would simply get the x/y position of the arrange view window, and then use arrange view start/end time positions to calculate the edit-cursor's 'x' position?

Yep, the code that you posted above should work. Just look out for divide-by-zero errors, and Window_FindChildByID(mainHWND, 1000) is more cross-platform reliable than Window_Find("trackview").

For interest's sake, here is some code that we used in another thread to do the same calculations as you do above:

trackview = reaper.JS_Window_FindChildByID(reaper.GetMainHwnd(), 1000)
rectOK, leftmostArrangeY = reaper.JS_Window_GetRect(trackview)
infoOK, scrollPos, pageSize, min, max, trackPos = reaper.JS_Window_GetScrollInfo(trackview, "HORZ")
cursorTimeFromStart = reaper.GetCursorPositionEx(0) -- Always counted from start of project, ignores "Project start time"
zoom = reaper.GetHZoomLevel() -- returns pixels/second
cursorPixelsFromStart = cursorTimeFromStart*zoom
cursorY = leftmostArrangeY + (cursorPixelsFromStart - scrollPos)

[Dafarkias]

Originally Posted by mespotine

Could this help you as well?
https://mespotin.uber.space/Ultrasch...tItemFromPoint

Always been a fan of your API... I think that's kinda the opposite of what I'm looking for in this regard though.

I'd like a function that gets a specific item's x/y coordinates, whereas it seems the function you referenced gets the item of a specific x/y coordinate.

Originally Posted by juliansader

Yep, the code that you posted above should work. Just look out for divide-by-zero errors, and Window_FindChildByID(mainHWND, 1000) is more cross-platform reliable than Window_Find("trackview").

Thanks for the information. I'm interested about what you say regarding divide-by-zero errors... Even when I input EC_time_pos and AV_a both as the value '0' and effectively divide AV_w by '0' I receive no error. Is that commonplace?

[Meo-Ada Mespotine]

How can I access dropdown/context-menüs programmatically?

I would love to access the following menupoint:

[deeb]

Anyone? i am trying to use this:
reaper.JS_Window_SetOpacity(w, "ALPHA", 0.5 )
but nothing happens! does this work on OSX (10.9.5) or am i doing something wrong?

docs says:

boolean reaper.JS_Window_SetOpacity(identifier windowHWND, string mode, number value)

mode: either "ALPHA" or "COLOR". 
value: If ALPHA, the specified value may range from zero to one, and will apply to the entire window. 
If COLOR, value specifies a 0xRRGGBB color, and all pixels in this color will be made transparent. (All mouse clicks over transparent pixels will pass through, too).

[Edgemeal]

Originally Posted by mespotine

How can I access dropdown/context-menüs programmatically?

I hope I'm wrong but doesn't seem possible, as soon as a context menu is shown all lua scripts are paused until the menu is closed, I'm guessing we need a defer option that runs on it own thread?

EDIT, not a context menu, maybe a regular menu?

[Meo-Ada Mespotine]

Ok. Maybe I can add that stuff somehow into my API. Thanks

[Meo-Ada Mespotine]

I don't know. But I think, it's a context menu. But I'm not deep enough in such things to know, what kind of menus exist.

[Edgemeal]

Originally Posted by mespotine

I don't know. But I think, it's a context menu. But I'm not deep enough in such things to know, what kind of menus exist.

Your right, it is a menu, it has a classname #32768, and to my surprise a defer-loop script didn't stop when it was shown, so maybe there is hope, you need to figure out where to send it a click message thouguh, not sdure how you do that without help of the GetMenuItemRect Win32 API.

Testing, how to get handle of a Menu (Windows classname #32768) and click top menu item.

function msg(str)
  reaper.ShowConsoleMsg(tostring(str) .. '\n')
end

function Post_LMouseDownUp(hwnd, x, y)
  reaper.JS_WindowMessage_Post(hwnd, "WM_LBUTTONDOWN", 1, 0, x, y)
  reaper.JS_WindowMessage_Post(hwnd, "WM_LBUTTONUP", 0, 0, x, y)
end

function FindMenu() 
 local arr = reaper.new_array({}, 255)
 local ret = reaper.JS_Window_ArrayAllTop(arr)
 if ret < 1 then return end
 local childs = arr.table()
  for j = 1, #childs do
    local hwnd = reaper.JS_Window_HandleFromAddress(childs[j])
    if reaper.JS_Window_GetClassName(hwnd) == "#32768" then
     return hwnd
    end 
  end
end

local function main() 
    menuWindow = FindMenu() 
    if menuWindow ~= nil then -- Menu window found.
      --< Add code to click inside window @ specific point to select a menu item :) >--
      retval, left, top, right, bottom = reaper.JS_Window_GetRect(menuWindow) 
      -- Post_LMouseDownUp(menuWindow, left+4, top+4) -- <<<< Clicks top menu item ???
      msg(menuWindow)
      return -- exit
    end
   reaper.defer(main)
end

reaper.defer(main)

[lexaproductions]

Hi JulianSader.
I'm trying to use reascript to change Project Tabs' order. See in this LICECap:

There's no way for me to change the order of Song 14, Song 15, Song 16, etc...

Mespotine told me there might be a way using your extension's childID?
I'm not too experienced yet in all of this but maybe you could enlight me if it is feasible to reorder tabs with reascript using your stuff?

[Meo-Ada Mespotine]

To add to lexaproductions, I think Click+Mousedragging-stuff could work for that, but I don't know, if such windows-messages exist in swell to do that...

And I don't know, if there's a way to find out, where which tab is...

[Meo-Ada Mespotine]

Maybe useful for finding the right localized-texts:

I made a LangPack-file, which shows to the left of the text the section, in which you can find it.
This is probably useful, when wanting to get the right hwnd-text, as some texts in the LangPacks are duplicated.

It looks like this:


You can get it here: https://raw.githubusercontent.com/Ul...ReaperLangPack

Just use it, as any other language-pack-file.

[juliansader]

Originally Posted by lexaproductions

Mespotine told me there might be a way using your extension's childID?
I'm not too experienced yet in all of this but maybe you could enlight me if it is feasible to reorder tabs with reascript using your stuff?

Unfortunately, I am not aware of any way to do this. (Someone else might know, though -- we can even ask the devs directly.)

[nikolalkc]

First of all I want to thank Julian for creating this amazing extension.


Second, is there a way to use JS_GDI_Line function to draw lines around selected items, like in a picture below?



Can I detect position of item edges at all?

[nofish]

Originally Posted by nikolalkc

Can I detect position of item edges at all?

Sure.
https://www.extremraym.com/cloud/rea...ItemInfo_Value

[nikolalkc]

Originally Posted by nofish

Sure.
https://www.extremraym.com/cloud/rea...ItemInfo_Value

I was actually thinking of position of items in terms of x and y coordinates in REAPER window.

[juliansader]

Originally Posted by nikolalkc

I was actually thinking of position of items in terms of x and y coordinates in REAPER window.

Sure, it's easy to do: check out post #604 and the next few posts on this page above.

[nikolalkc]

Originally Posted by juliansader

Sure, it's easy to do: check out post #604 and the next few posts on this page above.

Thanks Julian, but how do I change the color of the lines?
I'm completely new to GDI, i still don't understand the concept completely.

[juliansader]

Originally Posted by nikolalkc

Thanks Julian, but how do I change the color of the lines?
I'm completely new to GDI, i still don't understand the concept completely.

The color of the line is determined by the "pen" that is active in the window's "device context (dc)". Use JS_GDI_CreatePen to create a pen and then JS_GDI_SelectObject to activate it.

The online documentation for the corresponding C++ functions is probably the best place to learn how to use the API functions. For example, Window messages and Drawing with GDI.

Cockos's own LICE and swell C++ functions are not so extensively documented, and you will unfortunately have to browse through the "ReaScript, JSFX, REAPER Plug-in Extensions, Developer" subforum as well as the "WDL users" subforum. We are all figuring out together how REAPER works "under the hood" as we go along.

As alternative to GDI, use can use the JS_Composite functions, together with LICE. For the compositing functions, the best (and only) source of information is this and other discussion threads.

You can also get a better idea of what's going on under the hood by checking the source code on github.

[Meo-Ada Mespotine]

Cockos's own LICE and swell C++ functions are not so extensively documented, and you will unfortunately have to browse through the "ReaScript, JSFX, REAPER Plug-in Extensions, Developer" subforum as well as the "WDL users" subforum. We are all figuring out together how REAPER works "under the hood" as we go along.

If you guys find some threads with information about that, please drop a link into my Reaper-Internals-thread so I can use that as a base, when I document WDL, LICE and Swell at some point.
https://forum.cockos.com/showthread.php?t=207635

[_Stevie_]

Is there a way to clear a text / search field without the SetTitle method?

reaper.JS_Window_SetTitle(searchbox, "") does not work here, because the text is stored as caption and not as title.

[Meo-Ada Mespotine]

You can try, if the hwnd, whose title you can't change, has a childhwnd.
If yes, this probably holds the text as title...

[_Stevie_]

Nope, unfortunately not. I solved it by using a double mouse click and a press of the delete key. Not very elegant, but works.

[nappies]

Friends! Is there any way to get drag and drop Fx message from FX Browser to specific window (gfx window) with JS_API?)

[juliansader]

Originally Posted by _Stevie_

Is there a way to clear a text / search field without the SetTitle method?

reaper.JS_Window_SetTitle(searchbox, "") does not work here, because the text is stored as caption and not as title.

Which searchbox are you trying to edit? I tested a few, such as the ones in FX browser and Media Explorer, and SetTitle seems to work fine.

However, I read in Microsoft's documentation:

Changes the text of the specified window's title bar (if it has one). If the specified window is a control, the text of the control is changed. However, SetWindowText cannot change the text of a control in another application.
...
To set the text of a control in another process, send the WM_SETTEXT message directly instead of calling SetWindowText.

WM_SETTEXT is unfortunately not implemented in swell for macOS and Linux. On Windows, you can use WM_SETTEXT's code, 0x000C. I quickly tested this approach, and it also seems to work for the above-mentioned searchboxes. Sending a string via WindowMessage_Send is a bit complicated, though, since you need to convert the Lua string into a 0-terminated string in memory first:

m = reaper.JS_Mem_Alloc(10)
reaper.JS_Mem_FromString(m, 0, "testing\0", 8)
reaper.JS_WindowMessage_Send(searchbox, "0x000C", 0, 0, reaper.JS_Window_AddressFromHandle(m), 0)
reaper.JS_Mem_Free(m)

[_Stevie_]

Hey Julian!

I'm trying to change the search box from foobar2000:
https://i.imgur.com/WM3ctNS.gif

Ahh, I did not try WM_SETTEXT as hex code. Let me check if that works...

[_Stevie_]

Wohoo, that worked, thanks Julian!
But it worked without the Mem_Free function:

reaper.JS_WindowMessage_Send(searchbox, "0x000C", 0, 0, 0, 0)

Is there a downside not using it?

[juliansader]

I don't know? I don't see anything in the WM_SETTEXT documentation about null pointers, so I'm only guessing: Perhaps some programs may interpret a null pointer as "don't change the text", rather than "clear the text"?

[_Stevie_]

Okay that could be. In any case: it works! Thanks man

[reapero]

Wait..so you can actually jump into other windows and inject text or mouse clicks OUTSIDE Reaper by using some of the commands on the extension? :O

Would you guys have any code example?

[Xenakios]

Originally Posted by reapero

Wait..so you can actually jump into other windows and inject text or mouse clicks OUTSIDE Reaper

That's a standard feature of the Windows messaging system. You just need to get the correct target window handle (HWND) to send the message to. I don't think it's going to work on OS-X and Linux.

[reapero]

Yeah, windows only would be enough.

I´ve searched in the API for something like GetAllHwnd, to get all the handles from all the different opened applications (hoping to be able to filter afterwards and target the one i need) but i couldnt see nothing like this.

Any hint? Thx!

EDIT: Btw Xenakios, found out the other day that you did Hourglass. Congrats man! Thanks a lot for that. Cant wait to test the VST plugin

[_Stevie_]

reapero asked me, if I could post some examples in regard to my foobar2000 scripts I'm using. I guess this can also be of help for others in this thread.

Basically, I use foobar2000 as a database for my written cues and Lemur to
trigger buttons with search commands that will be written into foobar's quick search.
In the past, I used AHK for that (some pretty convoluted method: Lemur sending MIDI -> Loopmidi port on Windows -> and AHK would listen on that Loopmidi port).

To make a long story short. I moved over to LBX Stripper and assigned LUA scripts to buttons. That way I can do a search from within Reaper without all the MIDI connecting.

This would be a "type text in the quick search box"- script (I used a function that Edgemeal posted in this thread "JS_Send_Char"):

function foobarDB(keyword)

    -- insert keyword in foobar
    function JS_Send_Char(hwnd, str)
        for n = 1, string.len(str) do
        char = string.sub(str,n,n)
        ret = reaper.JS_WindowMessage_Send(hwnd, "WM_CHAR", string.byte(char), 0, 0, 0) 
        if ret ~= 1 then break end
        end
    end
    
    -- find fooabr200 window
    function GetFoobarSearchfield()
        foobar2000 = reaper.JS_Window_Find("foobar2000", false) -- find foobar2000 window
        quicksearch_toolbar = reaper.JS_Window_FindChild(foobar2000, "Quick Search Toolbar", true) -- look for Quick Search Toolbar child window
        search = reaper.JS_Window_FindChild(quicksearch_toolbar, "", true) -- find child window without title
        search_field = reaper.JS_Window_FindChildByID(search, 1001)
        reaper.BR_Win32_SetWindowPos(foobar2000,"HWND_TOPMOST" , 0, 0, 0, 0, 19) -- 19 = SWP_NOMOVE Or SWP_NOSIZE Or SWP_NOACTIVATE.
        reaper.JS_Window_SetForeground(search_field) -- focus search field
        
        
        return search_field, foobar2000
    end    
    
    local hwnd, foobar2000 = GetFoobarSearchfield()
    
    JS_Send_Char(hwnd, keyword)
end

[Edgemeal]

Originally Posted by reapero

Would you guys have any code example?

If I'm using JS_Mem correctly this should replace the selected text in Windows Notepad (that has titlebar text of "Untitled - Notepad") with "Hello World!",...

EM_REPLACESEL = '0x00C2'
text = "Hello World!" 
text_len = string.len(text) + 1

hwnd = reaper.JS_Window_FindTop('Untitled - Notepad', true) -- get notepad
if hwnd then
  edit = reaper.JS_Window_FindChildByID(hwnd, 15)  -- get 'edit'
  if edit then
    m = reaper.JS_Mem_Alloc(text_len)
    reaper.JS_Mem_FromString(m, 0, text..'\0', text_len)
    reaper.JS_WindowMessage_Send(edit, EM_REPLACESEL, 0, 0, reaper.JS_Window_AddressFromHandle(m), 0)
    reaper.JS_Mem_Free(m)
  end
end

[Edgemeal]

Originally Posted by reapero

I´ve searched in the API for something like GetAllHwnd, to get all the handles from all the different opened applications (hoping to be able to filter afterwards and target the one i need) but i couldnt see nothing like this.

reaper.JS_Window_ArrayFind
reaper.JS_Window_ArrayAllTop

[reapero]

Thanks guys! You are the best!

I see that its easier than i thought though. Hwnds can be found simply by the title bar´s name, which is something i wasnt counting on.

Thx again

EDIT: Ahh shit. The window i wanna target has appended the version of the program, and i update this every couple weeks. So i probably need to use the global commands Edgemeal was refering to.

[Edgemeal]

Originally Posted by reapero

The window i wanna target has appended the version of the program, and i update this every couple weeks. So i probably need to use the global commands Edgemeal was refering to.

If the app title text is unique enough you can just enter partial title, and set the exact param to false, e.g.,

hwnd = reaper.JS_Window_FindTop('REAPER v5.', false)

[reapero]

Thanks Edgemeal!

I could get the hwnd i wanted but then, unlike in Stevie´s gif with Foobar2000, i cant dive inside to look for the search field.

I think this is related with the app being done in Qt: Spyxx only detects one window (class Qt5QWindowIcon) and nothing else inside it. In fact in the windows tab of this window´s properties Spyxx displays "First Child Window Handle(None)"

Seems like an impossible task for the win32 api then?

[Xenakios]

Originally Posted by reapero

I think this is related with the app being done in Qt

...

Seems like an impossible task for the win32 api then?

Yes, unfortunately not possible if the application is written with something like Qt or JUCE.