Method SaveToWeightsFile

Explore/MapViewHelper.cpp:459–529

}

void MSTMapHelper::SaveToWeightsFile(Project* project)
{
    // create MST first if needed
    if (this->Create(project) == false) {
        return;
    }
    
    // Get ID variable for spatial weights file
    SelectWeightsIdDialog selid_dlg(NULL, project);
    if (selid_dlg.ShowModal() != wxID_OK) {
        return;
    }
    TableInterface* table_int = project->GetTableInt();
    wxString id = selid_dlg.GetIDVariable();
    if (id.IsEmpty()) return;

    int col = table_int->FindColId(id);
    if (col < 0) return;

    std::vector<wxString> ids;
    table_int->GetColData(col, 0, ids);

    // prompt user to select output file
    wxString filter = "GWT|*.gwt";
    wxFileDialog dialog(NULL, _("Save Spanning Tree to a Weights File"),
                        wxEmptyString, wxEmptyString, filter,
                        wxFD_SAVE | wxFD_OVERWRITE_PROMPT);
    if (dialog.ShowModal() != wxID_OK) {
        return;
    }

    // create Spatial weights file
    wxFileName fname = wxFileName(dialog.GetPath());
    wxString new_main_dir = fname.GetPathWithSep();
    wxString new_main_name = fname.GetName();
    wxString new_txt = new_main_dir + new_main_name+".gwt";
    wxTextFile file(new_txt);
    file.Create(new_txt);
    file.Open(new_txt);
    file.Clear();

    wxString header;
    header << "0 " << project->GetNumRecords() << " ";
    header << "\"" << project->GetProjectTitle() << "\" ";
    header <<  id;
    file.AddLine(header);

    for (int i=0; i<mst_edges.size(); i++) {
        int f_idx = mst_edges[i].first;
        int t_idx = mst_edges[i].second;

        if (f_idx == t_idx) {
            continue;
        }

        double cost = t_idx > f_idx ? dist_matrix[f_idx][t_idx - f_idx-1] :
        dist_matrix[t_idx][f_idx - t_idx-1];
        wxString line1;