Method DrawHighlight

Explore/MapLayer.cpp:197–264

}

void BackgroundMapLayer::DrawHighlight(wxMemoryDC& dc, MapCanvas* map_canvas)
{
    // draw any connected layers
    std::map<AssociateLayerInt*, Association>::iterator it;
    for (it=associated_layers.begin(); it!=associated_layers.end();it++) {
        AssociateLayerInt* associated_layer = it->first;
        Association& al = it->second;
        wxString primary_key = al.first;
        wxString associated_key = al.second;
        
        std::vector<wxString> pid(shapes.size());  // e.g. 1 2 3 4 5
        if (primary_key.IsEmpty() == false) {
            GetKeyColumnData(primary_key, pid);
        } else {
            for (int i=0; i<shapes.size(); i++) {
                pid[i] << i;
            }
        }
        std::vector<wxString> fid; // e.g. 2 2 1 1 3 5 4 4
        associated_layer->GetKeyColumnData(associated_key, fid);
        associated_layer->ResetHighlight();

        std::map<wxString, std::vector<wxInt64> > aid_idx;
        for (int i=0; i<fid.size(); i++) {
            aid_idx[fid[i]].push_back(i);
        }
        
        for (int i=0; i<highlight_flags.size(); i++) {
            if (!highlight_flags[i]) {
                continue;
            }
            wxString aid = pid[i];
            if (aid_idx.find(aid) == aid_idx.end()) {
                continue;
            }
            std::vector<wxInt64>& ids = aid_idx[aid];
            for (int j=0; j<ids.size(); j++) {
                associated_layer->SetHighlight( ids[j] );
            }
        }
        associated_layer->DrawHighlight(dc, map_canvas);
        // draw lines to associated layer
        wxPen pen(this->GetAssociatePenColour());
        dc.SetPen(pen);
        for (int i=0; i<highlight_flags.size(); i++) {
            if (!highlight_flags[i]) {
                continue;
            }
            wxString aid = pid[i];
            if (aid_idx.find(aid) == aid_idx.end()) {
                continue;
            }
            std::vector<wxInt64>& ids = aid_idx[aid];
            for (int j=0; j<ids.size(); j++) {
                if (associated_lines[associated_layer] && !associated_layer->IsHide()) {
                    dc.DrawLine(shapes[i]->center, associated_layer->GetShape(ids[j])->center);
                }
            }