Only scale available reportlab attributes (#365)

src/gourmet/plugins/import_export/pdf_plugin/pdf_exporter.py

@@ -269,14 +269,15 @@ def setup_frames(self,
                              f'not {mode}')
         return frames
 
-    def scale_stylesheet (self, perc):
-        for name,sty in list(self.styleSheet.byName.items()):
+    def scale_stylesheet(self, perc: float):
+        for name, sty in list(self.styleSheet.byName.items()):
             for attr in ['firstLineIndent',
                          'fontSize',
                          'leftIndent',
                          'rightIndent',
                          'leading']:
-                setattr(sty,attr,int(perc*getattr(sty,attr)))
+                if hasattr(sty, attr):
+                    setattr(sty, attr, int(perc * getattr(sty, attr)))
 
     def setup_column_frames (self, n):
         COLUMN_SEPARATOR = 0.5 * inch
@@ -863,13 +864,23 @@ class PdfPrefGetter:
                           _('Index Cards (4x6)'),
                           _('Index Cards (A7)')]
     layouts = {_('Plain'): ('column', 1),
+               _('2 Columns'): ('column', 2),
+               _('3 Columns'): ('column', 3),
+               _('4 Columns'): ('column', 4),
+               _('5 Columns'): ('column', 5),
                _('Index Cards (3.5x5)'): ('index_cards', (5 * inch, 3.5 * inch)),
                _('Index Cards (4x6)'): ('index_cards', (6 * inch, 4 * inch)),
                _('Index Cards (A7)'): ('index_cards', (105 * mm, 74 * mm))}
+    for n in range(2, 5):
+        layouts[ngettext('%s Column', '%s Columns', n) % n] = ('column', n)
 
     # These two dictionaries are here to be able to store the preferences in the persistent toml file.
     # This allows us to have a locale-agnostic GUI.
     _layouts_to_settings = {_('Plain'): 'plain',
+                            _('2 Columns'): '2_columns',
+                            _('3 Columns'): '3_columns',
+                            _('4 Columns'): '4_columns',
+                            _('5 Columns'): '5_columns',
                             _('Index Cards (3.5x5)'): 'index_cards_35_5',
                             _('Index Cards (4x6)'): 'index_cards_4_6',
                             _('Index Cards (A7)'): 'a7'}
@@ -884,9 +895,6 @@ class PdfPrefGetter:
     def __init__(self):
         self.size_strings = list(self.page_sizes.keys())
         self.size_strings.sort()
-        for n in range(2,5):
-            self.layouts[ngettext('%s Column','%s Columns',n)%n]=('column',n)
-
         self.page_sizes_r = {v: k for k, v in self.page_sizes.items()}
         self.layouts_r = {v: k for k, v in self.layouts.items()}
         self.page_modes_r = {v: k for k, v in self.page_modes.items()}
@@ -920,7 +928,6 @@ def __init__(self):
         default_layout = defaults.get('page_layout',
                                       PDF_PREF_DEFAULT['page_layout'])
         default_layout = self._settings_to_layout[default_layout]
-        # default_layout = self.layouts_r[default_layout]
         layout = [_('Page _Layout'),
                   (default_layout, self.layout_strings)]
 
@@ -1012,10 +1019,6 @@ def change_cb(self, option_table, *args,**kwargs):
                 if n in [i[0] for i in self.index_card_layouts_to_put_back]:
                     default_pos = self.layout_strings.index(_('Plain'))
                     cb.set_active(default_pos)
-                self.index_card_layouts_to_put_back.reverse()
-                for pos,txt in self.index_card_layouts_to_put_back:
-                    cb.remove_text(pos)
-                self.index_card_layouts_to_put_back.reverse()
             elif pagesize not in self.INDEX_CARDS and last_pagesize in self.INDEX_CARDS:
                 changed = True
                 option_table.set_option(self.OPT_PO,_('Portrait'))