PreviewColumn
PreviewColumn::PreviewColumn(const char *title, float width,
PreviewColumn::DrawField(BField* field, BRect rect, BView* parent)
PreviewColumn::AcceptsField(const BField* field) const
class PreviewColumn : public BTitledColumn
PreviewColumn(const char *title, float width,
fListView->AddColumn(new PreviewColumn("Data", 150, 50, 300), 3);