Redmine

Improved bar length calculation accuracy for exporting to PDF (and png).
(modified patch code)

--- a/lib/redmine/helpers/gantt.rb
+++ b/lib/redmine/helpers/gantt.rb
@@ -632,7 +632,7 @@
           end
           if end_date < self.date_to
             coords[:end] = end_date - self.date_from
-            coords[:bar_end] = end_date - self.date_from + 1
+            coords[:bar_end] = calc_bar_end(coords[:bar_start], end_date, zoom)
           else
             coords[:bar_end] = self.date_to - self.date_from + 1
           end
@@ -640,16 +640,16 @@
             progress_date = calc_progress_date(start_date, end_date, progress)
             if progress_date > self.date_from && progress_date > start_date
               if progress_date < self.date_to
-                coords[:bar_progress_end] = progress_date - self.date_from
+                coords[:bar_progress_end] = calc_bar_end(coords[:bar_start], progress_date, zoom)
               else
                 coords[:bar_progress_end] = self.date_to - self.date_from + 1
               end
             end
             if progress_date <= User.current.today
-              late_date = [User.current.today, end_date].min + 1
+              late_date = [User.current.today, end_date].min
               if late_date > self.date_from && late_date > start_date
                 if late_date < self.date_to
-                  coords[:bar_late_end] = late_date - self.date_from
+                  coords[:bar_late_end] = calc_bar_end(coords[:bar_start], late_date, zoom)
                 else
                   coords[:bar_late_end] = self.date_to - self.date_from + 1
                 end
@@ -665,7 +665,16 @@
       end

       def calc_progress_date(start_date, end_date, progress)
-        start_date + (end_date - start_date + 1) * (progress / 100.0)
+        start_date + (end_date - start_date) * (progress / 100.0)
+      end
+
+      def calc_bar_end(start_date, end_date, zoom)
+        end_of_bar = end_date - self.date_from + 1
+        start_zoom = (start_date * zoom).floor
+        if (end_of_bar * zoom).floor <= start_zoom
+          end_of_bar = (start_zoom + 1) / zoom
+        end
+        end_of_bar
       end

       # Singleton class method is public

Mischa The Evil wrote:

taca tadocolo wrote:

Related to #23645 (Gantt bars for single-day tasks may be rendered wrongly in PDF)

So the issue reported in this issue is solved by the changes for #23645? Can you confirm that is the case (also the png version of the gantt)?

Yes, I confirmed this issue has been resolved in Redmine 4.1.1.