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2752 :: How to open new console window and File, FileInfo, FileHandle

• mmierzwa (orginal) [2017-01-24T18:11:35+01:00] view original

  Hi

  I am trying to open new console window and be able to write to it. My attempts failed. How to do that? (currently using MinGW)

  During my attempts I tried to create process using startProcess I noticed that I can get then FileHandle for process. However I do not know how obtain File to which I could write (like stdout), I also have seen FileInfo. So having File, FileHandle, FileInfo - could someone give some hints about them? I could also fetch input Stream.

  Also tried

  proc shellExecuteW(HWND: Handle;
                    lpOperation, lpFile, lpParameters, lpDirectory: WideCString;
                    nShowCmd: int32): Handle {..}
  Run

  Here I do not know how to change string to WideCString.

  Third. Is it difficult (it is not, but for me it is) to switch to vcc compiler? Are there any easy manual for that?

  Thanks in advance for any help. So many questions in one but this is because long time I was unable to register to forum and it was raising.

  Regards Michal /The really bad programmer/

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• Libman (orginal) [2017-01-24T19:21:20+01:00] view original

  Here's an incomplete idea that may or may not be helpful...

  There might be some fancy Windows API tricks for interacting with other console windows, but then your code would be more difficult to port. I would first consider the simplest solution: startProcess the start and cmd with the needed switches, command, and the rest of the args. That will spawn a new console window, but I don't think you can access its I/O streams the same way.

  It is common for an exe to fork a copy of itself with special args, and even communicate via a portable IPC library (nanomsg?) if needed. Then the only Windows-dependent thing is how the visible console window is launched, for which there are one-line equivalents on other GUI platforms (ex. xterm / gnome-terminal, open -a Terminal on Mac, etc).

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• AironGregatti (orginal) [2017-01-24T19:41:25+01:00] view original

  If I understand what you need, to convert a "string" to "WideCString", you can do the following:

  # Convert a "string" to "WideCString".
  proc toWideCString(str: string): WideCString =
    var
      i   : int = 0
      ret : WideCString
    
    new(ret)
    
    while i < str.len():
      ret[i] = Utf16Char(str[i])
      i = i + 1
    
    return ret
  
  
  # Example:
  
  var str : WideCString
  
  str = toWideCString("Nim language")
  
  echo str
  
  Run

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• Araq (orginal) [2017-01-24T20:13:47+01:00] view original

  http
  http
  

  or maybe

  import winlean
  
  var o = newWideCString("open")
  var u = newWideCString(url)
  discard shellExecuteW(0'i32, o, u, nil, nil, SW_SHOWNORMAL)
  
  Run

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• mmierzwa (orginal) [2017-01-25T09:17:11+01:00] view original

  When I am in forum view I see there are 4 answers in this thread and I see also AironGregatti. However when I enter I see only 3 posts without that from Airon. Why is this so? Moderation?

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• Araq (orginal) [2017-01-25T09:53:56+01:00] view original

  Why is this so? Moderation?

  Yes.

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• mashingan (orginal) [2017-01-25T10:55:16+01:00] view original

  @mmierzwa, for third question you can override compiler to vcc with option --cc:vcc when compiling. Or you can put it in cfg file beside your nim file, put it cc = vcc. For detailed config, check the default config file in $NIM/config/nim.cfg

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