Re: [wxlua-users] How to disable logging window with error message in wxlua?

[Paul K <pau...@ya...>]

Hi John,

> This does not show the error dialog for me in Linux.

it seems like you need to have a frame open to see the effect (your
code works regardless of whether LogNull is there). Try the code
below.

The solution is indeed to use "local log = wx.wxLogNull()", but it
needs to be used *before* wxFile constructor, because this is where it
is failing (not in the Write method as I thought initially). Thanks
for getting me on the right track.

require "wx"

function FileWrite(file,content)
  -- local log = wx.wxLogNull() --<-- LogNull code should be here
  local file = wx.wxFile(file, wx.wxFile.write)
  if not file:IsOpened() then return nil, wx.wxSysErrorMsg() end

  local log = wx.wxLogNull()
  file:Write(content, #content)
  file:Close()
  log:delete() -- this doesn't seem to be needed
  return true
end

function main()
    -- create the wxFrame window
    local frame = wx.wxFrame( wx.NULL,            -- no parent for
toplevel windows
                        wx.wxID_ANY,          -- don't need a wxWindow ID
                        "wxLua Minimal Demo", -- caption on the frame
                        wx.wxDefaultPosition, -- let system place the frame
                        wx.wxSize(450, 450),  -- set the size of the frame
                        wx.wxDEFAULT_FRAME_STYLE ) -- use default frame styles

    -- show the frame window
    frame:Show(true)

    if not FileWrite("/my-read-only-file", "something") then
      wx.wxMessageBox("Unable to save file.", "Error", wx.wxOK + wx.wxCENTRE)
    end
end

main()

wx.wxGetApp():MainLoop()

Paul.

On Thu, Aug 16, 2012 at 8:21 PM, John Labenski <jla...@gm...> wrote:
> On Thu, Aug 16, 2012 at 10:56 PM, Paul K <pau...@ya...> wrote:
>> Hi all,
>>
>> I'm working with an application that saves data in files and some of
>> the operations may trigger file errors. I'm handling those errors
>> myself and don't want to see the standard error message shown by
>> wxwidgets. How do I disable it? Here is the code that I have:
>>
>>   local file = wx.wxFile(filename, wx.wxFile.write)
>>   file:Write("something", #"something")
>>
>> If the file is write protected, I get "can't open file '...' (error 5:
>> access is denied)". I know, I can check for that condition, but this
>> is not what the question is about. I'd like to disable that message.
>>
>> 1. use wxLogNull. I read C++ examples, but not sure how this should be
>> used in wxlua (according to examples, you just need to "instantiate"
>> this logNull object):
>
> This does not show the error dialog for me in Linux.
>
> local log = wx.wxLogNull()
> local file = wx.wxFile("/aaa", wx.wxFile.write)
> print(file:IsOpened())
> if (file:IsOpened())
>      -- This asserts as it should if the file is not opened
>      file:Write("something", #"something")
> end()
> log:delete()
>
> Regards,
>     John
>
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