fix minimum start difference for same row computation (jquense#886)

src/DayColumn.js

@@ -165,7 +165,9 @@ class DayColumn extends React.Component {
       rtl: isRtl,
       selected,
       startAccessor,
+      step,
       titleAccessor,
+      timeslots,
       tooltipAccessor,
     } = this.props
 
@@ -174,6 +176,7 @@ class DayColumn extends React.Component {
       startAccessor,
       endAccessor,
       slotMetrics: this.slotMetrics,
+      minimumStartDifference: Math.ceil((step * timeslots) / 2),
     })
 
     return styledEvents.map(({ event, style }, idx) => {

src/utils/DayEventLayout.js

@@ -90,12 +90,12 @@ class Event {
 /**
  * Return true if event a and b is considered to be on the same row.
  */
-function onSameRow(a, b) {
+function onSameRow(a, b, minimumStartDifference) {
   return (
     // Occupies the same start slot.
-    Math.abs(b.start - a.start) <= 30 ||
+    Math.abs(b.start - a.start) < minimumStartDifference ||
     // A's start slot overlaps with b's end slot.
-    (a.start > b.start && a.start < b.end)
+    (b.start > a.start && b.start < a.end)
   )
 }
 
@@ -129,7 +129,7 @@ function sortByRender(events) {
   return sorted
 }
 
-function getStyledEvents({ events, ...props }) {
+function getStyledEvents({ events, minimumStartDifference, ...props }) {
   // Create proxy events and order them so that we don't have
   // to fiddle with z-indexes.
   const proxies = events.map(event => new Event(event, props))
@@ -144,7 +144,9 @@ function getStyledEvents({ events, ...props }) {
 
     // Check if this event can go into a container event.
     const container = containerEvents.find(
-      c => c.end > event.start || Math.abs(event.start - c.start) < 30
+      c =>
+        c.end > event.start ||
+        Math.abs(event.start - c.start) < minimumStartDifference
     )
 
     // Couldn't find a container — that means this event is a container.
@@ -161,7 +163,7 @@ function getStyledEvents({ events, ...props }) {
     // Start looking from behind.
     let row = null
     for (let j = container.rows.length - 1; !row && j >= 0; j--) {
-      if (onSameRow(container.rows[j], event)) {
+      if (onSameRow(container.rows[j], event, minimumStartDifference)) {
         row = container.rows[j]
       }
     }