I just noticed that when a file import plug-in has multiple file types declared, that when a file gets dropped onto Rhino the index in de ReadFile method is incorrect. When the file gets opened from the File>Open or File>Import menu, the problem does not appear.
When I drag a file with extension .dat onto Rhino when the file import plug-in (see below for code) is loaded, I get the following:
Observed output
Received index 0
TXT file
Expected output
Received index 1
DAT File
private int txtIndex, datIndex, wordIndex;
protected override Rhino.PlugIns.FileTypeList AddFileTypes(Rhino.FileIO.FileReadOptions options)
{
var result = new Rhino.PlugIns.FileTypeList();
txtIndex = result.AddFileType("Text file (*.txt)", "txt");
datIndex = result.AddFileType("Data File (*.dat, *.plt)", "dat", "plt");
wordIndex = result.AddFileType("Word Document (*.docx)", "docx");
RhinoApp.WriteLine("TXT index {0}", txtIndex);
RhinoApp.WriteLine("DAT index {0}", datIndex);
RhinoApp.WriteLine("WORD index {0}", wordIndex);
return result;
}
protected override bool ReadFile(string filename, int index, RhinoDoc doc, Rhino.FileIO.FileReadOptions options)
{
bool read_success = false;
RhinoApp.WriteLine("Received index {0}", index);
if (index == txtIndex)
RhinoApp.WriteLine("TXT file");
else if (index == datIndex)
RhinoApp.WriteLine("DAT file");
else if (index == wordIndex)
RhinoApp.WriteLine("WORD file");
return read_success;
}
