The middle header shows every hour despite I have configured each 4 hour to be displayed.
Here is the preset:
tickWidth: 60,
tickHeight: 30,
displayDateFormat: 'HH:mm',
shiftIncrement: 1,
shiftUnit: 'week',
defaultSpan: 12,
timeResolution: {
unit: 'minute',
increment: 30
},
headerConfig: {
middle : {
unit: 'hour',
increment: 4,
dateFormat: 'HH:mm'
},
top: {
unit: 'day',
dateFormat: 'ddd DD/MM'
}
},
columnLinesFor: 'middle'
});