Introduction
A row object is used to store the activities found on a row of the Gantt chart. These activities are not stored directly on the row but in an activity repository. The default repository is of type IntervalTreeActivityRepository. Activities can be placed on lines within the row. The row delegates this work to a LinesManager. The default manager is of type EqualLinesManager.
Type Arguments & Hierarchy
Three type arguments are needed to define a row. The first one defines the type of the parent row, the second one defines the type of the children rows, the third one defines the type of the activities shown on the row. The following is an example that defines a "building", that is part of a factory. The building has machines in it. In the building row we are showing shifts.
public class Building extends Row<Factory, Machine, Shift> {
}
A model like this would allow us to display a hierarchy in the Gant chart that might look like this:
- Factory
- Building 1
- Building 2
- Building 3
- Machine A
- Machine B
- Machine B
- Building 4
- Machine C
- Machine D
Properties
Each row has a set of properties.
| Property | Description |
|---|---|
BooleanProperty expanded |
Controls whether the row will show its children rows or not. |
DoubleProperty height |
The current height of the row. |
DoubleProperty minHeight |
The minimum height of the row. |
DoubleProperty maxHeight |
The maximum height of the row. |
ObjectProperty<Layout> layout |
The layout used by the row. The default is Gantt Layout. |
IntegerProperty lineCount |
The number of inner lines to show within the row. |
ObjectProperty<LinesManager<A>> linesManager |
The lines manager used for controlling the lines, their location, their height, the placement of the activities. |
StringProperty name |
The name of the row, e.g. "Machine 1", "Building 1". |
ReadOnlyObjectProperty<P> parent |
The parent row. This is a read-only property that is managed internally and updated when a row gets added to the list of children of another row. |
ObjectProperty<ActivityRepository> repository |
The repository used by the row to store the activities. |
BooleanProperty showing |
A flag used to signal that the row is currently shown in the UI. This information can be used for optimizing lazy loading strategies. |
ObjectProperty<Object> userObject |
An optional user object. Used to have a bridge to the business model. |
ObjectProperty<ZoneId> zoneId |
The timezone represented by the row. Each row can be in its own timezone. |