How to Convert X to Time and Time to X in the Chart?

Often you might want to convert an X location in the GanttChart to a DateTime value (based on the current time scale headers settings) and vice versa. This is easily done using the following methods in GanttChart:

// xPos is a x value in GanttChart co-ordinates

DateTime dt = this.ganttControl.GanttChart.ConvertXToTime(xPos);

// xPos is a x value in GanttChart co-ordinates

double xValue = this.ganttControl.GanttChart.ConvertTimeToX(aDateTime);

To expand all / collapse all tasks, in the GanttControl, use the GanttControl.ExpandAll and GanttControl.CollapseAll methods.