[wxMSW][wx3.0.2] Unable to get file name on watch directory notification Topic is solved

[Rudra]

HI,


In my wx application, using wxFileSystemWatcher, I am watching a directory for file being added to it. I get notification when a file is added but I can't get it name/path. The event.GetPath().GetFullPath() gives the watching directory path. My code is as follows,

Code: Select all

bool CUFrame::CreateFSWatcher()
{
    if(m_watcher)
        return false;

    m_watcher = new wxFileSystemWatcher();
    m_watcher->SetOwner(this);

    this->Connect(wxEVT_FSWATCHER, wxFileSystemWatcherEventHandler(CUFrame::OnFileSystemEvent));

    return true;
}

bool CUFrame::AddFSEntry(const wxString& dirPath)
 {
     if(m_watcher == NULL)
         return false;

     if(wxDirExists(dirPath) == false)
         return false;

     return m_watcher->Add(dirPath, wxFSW_EVENT_CREATE);
 }
 
void CUFrame::OnFileSystemEvent(wxFileSystemWatcherEvent& event)
{
 std::string path = event.GetPath().GetFullPath().ToStdString();
}

Please suggest.

Thanks,
R.

[PB]

I would have thought you may get an error or warning but as you do not connect events with those flags (IMO you certainly should) I have no clue.

Did you check the string provided by event.ToString() to see if there's anything useful?

[T-Rex]

You probably need to add the directory for watching via AddTree() call.

[Rudra]

Did you check the string provided by event.ToString() to see if there's anything useful?

Yes, it gives : FSW_EVT type=1 (CREATE) path='C:\Users\Rudresh Pandey\Documents\Rudresh\Send' which is the watching directory path.

[Rudra]

You probably need to add the directory for watching via AddTree() call.

I tried AddTree() with wxFSW_EVENT_ALL event and see same issue.

event.ToString() is as follows,
FSW_EVT type=1 (CREATE) path='C:\Users\Rudresh Pandey\Documents\Rudresh\Send'
FSW_EVT type=8 (MODIFY) path='C:\Users\Rudresh Pandey\Documents\Rudresh\Send'
FSW_EVT type=8 (MODIFY) path='C:\Users\Rudresh Pandey\Documents\Rudresh\Send'

[PB]

Just a wild guess: Is the folder in question a regular folder and not just a shortcut to an actual filesystem directory or something like that? I do not know if it is actually possible to do that though.

Can you reproduce the behaviour on a regular (c:\fstest\test") folder and test that folder of yours with the fswatcher sample?

[T-Rex]

Code: Select all

m_watcher = new wxFileSystemWatcher();
m_watcher->SetOwner(this);
m_watcher->AddTree(wxFileName(wxT("D:\\Projects\\wxTest")), wxFSW_EVENT_CREATE, wxT("*.*"));

Connect(wxEVT_FSWATCHER, wxFileSystemWatcherEventHandler(wxTestApp::OnFS));

void wxTestApp::OnFS(wxFileSystemWatcherEvent & e)
{
	wxMessageBox(e.GetPath().GetFullPath());
}

Works for me.
https://www.screencast.com/t/sbT7KJegmkL3

[Rudra]

Code: Select all

m_watcher->AddTree(wxFileName(wxT("D:\\Projects\\wxTest")), wxFSW_EVENT_CREATE, wxT("*.*"));

Yes, the above code works for me as well. On comparing with my code, I found that the issue is in how I was adding the path.

Code: Select all

bool CUFrame::AddFSEntry(const wxString& dirPath)
 {
     if(m_watcher == NULL)
         return false;

     if(wxDirExists(dirPath) == false)
         return false;

     return m_watcher->Add(dirPath, wxFSW_EVENT_CREATE);
 }

The Add() expects wxFileName but wxString was getting passed. Passing it as wxFileName fixes the issue for both AddTree and Add().

Thanks for the help.

R.