views/month-view: Add and update accessible elements

Part-of: <https://gitlab.gnome.org/GNOME/gnome-calendar/-/merge_requests/564>

src/gui/views/gcal-month-cell.blp

@@ -13,6 +13,13 @@ template $GcalMonthCell: Adw.BreakpointBin {
     }
   }
 
+  accessibility {
+    labelled-by: day_label;
+    has-popup: true;
+    selected: false;
+  }
+
+  accessible-role: grid_cell;
   width-request: 50;
   height-request: 50;
   hexpand: true;

src/gui/views/gcal-month-cell.c

@@ -624,6 +624,9 @@ gcal_month_cell_set_selected (GcalMonthCell *self,
     return;
 
   self->selected = selected;
+  gtk_accessible_update_state (GTK_ACCESSIBLE (self),
+                               GTK_ACCESSIBLE_STATE_SELECTED, selected,
+                               -1);
 
   /* Update style context state */
   flags = gtk_widget_get_state_flags (GTK_WIDGET (self));

src/gui/views/gcal-month-view-row.c

@@ -1111,6 +1111,9 @@ gcal_month_view_row_init (GcalMonthViewRow *self)
       gcal_month_cell_set_overflow (GCAL_MONTH_CELL (self->day_cells[i]), 0);
       gtk_widget_set_parent (self->day_cells[i], GTK_WIDGET (self));
       g_signal_connect (self->day_cells[i], "show-overflow", G_CALLBACK (on_month_cell_show_overflow_cb), self);
+      gtk_accessible_update_relation (GTK_ACCESSIBLE (self->day_cells[i]),
+                                      GTK_ACCESSIBLE_RELATION_COL_INDEX, i + 1,
+                                      -1);
     }
 }
 

src/gui/views/gcal-month-view.blp

@@ -2,6 +2,7 @@ using Gtk 4.0;
 
 template $GcalMonthView: Widget {
   overflow: hidden;
+  accessible-role: grid;
 
   styles [
     "month-view",

src/gui/views/gcal-month-view.c

@@ -1694,6 +1694,11 @@ gcal_month_view_init (GcalMonthView *self)
   gtk_widget_init_template (GTK_WIDGET (self));
   update_weekday_labels (self);
 
+  gtk_accessible_update_relation (GTK_ACCESSIBLE (self),
+                                  GTK_ACCESSIBLE_RELATION_COL_COUNT, 7,
+                                  GTK_ACCESSIBLE_RELATION_ROW_COUNT, N_ROWS_PER_PAGE,
+                                  -1);
+
   self->week_rows = g_ptr_array_new_full (N_TOTAL_ROWS, (GDestroyNotify) gtk_widget_unparent);
   for (gint i = 0; i < N_TOTAL_ROWS; i++)
     {