X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.history%2Fsrc%2Forg%2Fsimantics%2Fhistory%2Fimpl%2FCollectorImpl.java;h=e956b37117fcc365cbb85cf0e2b339752d814bcc;hp=87062a9dabecae759aa0f5dffd442a496af156e5;hb=b885083762a43ec97162a5f77df4fd5f85e28979;hpb=fee871302ad4c53ca2c2307bd13366d99116d930

diff --git a/bundles/org.simantics.history/src/org/simantics/history/impl/CollectorImpl.java b/bundles/org.simantics.history/src/org/simantics/history/impl/CollectorImpl.java
index 87062a9da..e956b3711 100644
--- a/bundles/org.simantics.history/src/org/simantics/history/impl/CollectorImpl.java
+++ b/bundles/org.simantics.history/src/org/simantics/history/impl/CollectorImpl.java
@@ -815,11 +815,20 @@ public class CollectorImpl implements Collector {
 
 			/// Extend existing band
 			// Extend endTime value
-			if (!i.hasEndTime) {
-				i.current.setTime( time.getBinding(), time.getValue() );
-			} else {
-				i.current.setEndTime( time.getBinding(), time.getValue() );
+
+			// This ensures that a value band's end time isn't the same
+			// as the next band's start time which makes it possible to
+			// know what are the timestamps between which the item value
+			// changed from a to b. This allows us to more correctly render
+			// steps and sloped lines accoring to the actual data.
+			if (!i.itemState.ooDeadband || isMinMaxFormat) {
+				if (!i.hasEndTime) {
+					i.current.setTime( time.getBinding(), time.getValue() );
+				} else {
+					i.current.setEndTime( time.getBinding(), time.getValue() );
+				}
 			}
+
 			if (i.itemState.ooDeadband || isMinMaxFormat) {
 				if (isValidValue) {
 					// Set last value