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Providing data to the grid

mleibman edited this page · 4 revisions

Overview

The data is passed to the grid via the constructor and can also be accessed using the setData(data) and getData() methods. Data itself can be either an array-like object with a length property and an indexer (data[index]) or a custom data provider implementing the following interface:

  • getLength() - returns the number of data items in the set
  • getItem(index) - returns the item at a given index
  • getItemMetadata(index) - returns the metadata for the item at a given index (optional)

Item Metadata

getItemMetadata provides a powerful way of specifying additional information about a data item that let the grid customize the appearance and handling of a particular data item. The method should return null if the item requires no special handling, or an object in the following general format:

{
  // properties describing metadata related to the item (i.e. grid row) itself
  "<property>": value,
  "<property>": value,

  // properties describing metadata related to individual columns
  "columns":  {
    "<column index>":  {
      // metadata indexed by column index
      "<property>": value,
      "<property>": value
    },

    "<column id>":  {
      // metadata indexed by column id
      "<property>": value,
      "<property>": value
    }
  }
}

Row-level properties

  • cssClasses (string) - One or more (space-separated) CSS classes to be added to the entire row.
  • focusable (boolean) - Whether or not any cells in the row can be set as "active".
  • selectable (boolean) - Whether or not a row or any cells in it can be selected.

Column-level properties

  • focusable (boolean) - Whether or not a cell can be set as "active".
  • selectable (boolean) - Whether or not a cell can be selected.
  • formatter (Function) - A custom cell formatter.
  • editor (Function) - A custom cell editor.
  • colspan (number|string) - Number of columns this cell will span. Can also contain "*" to indicate that the cell should span the rest of the row.

Order of checks

When looking up a property, the grid checks in the following order:

  1. Row-level item metadata.
  2. Column-level item metadata by column id.
  3. Column-level item metadata by column index.
  4. Column definition.
  5. Grid options.
  6. Grid defaults.

Examples

See colspan example.

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