When working with a Range Selection, a Fill Handle allows you to run operations on cells as you adjust the size of the range.
Enabling the Fill Handle
To enable the Fill Handle, simply set
true in the
enableRangeHandle, the Fill Handle will take precedence.
Example: Range Selection with Fill Handle
The example below demonstrates the basic features of the fill handle:
- When a range of numbers is selected and that range is extended, the Grid will detect the linear progression of the selected items and fill the extra cells with calculated values.
- When a range of strings or a mix of strings and numbers are selected and that range is extended, the range items will be copied in order until all new cells have been properly filled.
When a range of numbers is selected and the range is increased while pressing the
Option / Altkey, the behaviour will be the same as when a range of strings or mixed values is selected.
- When a single cell is selected and the range is increased, the value of that cell will be copied to the cells added to the range.
When a single cell containing a number value is selected and the range is increased while pressing the
Option / Altkey, that value will be incremented (or decremented if dragging to the left or up) by the value of one until all new cells have been filled.
- When reducing the size of the range, cells that are no longer part of the range will be cleared (set to
Example: Reducing the Range Size
If the behaviour for decreasing selection needs to be prevented, the flag
suppressClearOnFillReduction should be set to
Custom User Function
Often there is a need to use a custom method to fill values instead of simply copying values or increasing number
values using linear progression. In these scenarios, the
fillOperation callback should be used.
The interface for
fillOperation is as follows:
fillOperationcallback is provided, the fill handle will always run it. If the current values are not relevant to the
fillOperationfunction that was provided,
falseshould be returned to allow the grid to process the values as it normally would.
Example: Using Custom User Functions
The example below will use the custom
fillOperation for the Day of the week column, but it will
use the default operation for any other column.