nsITreeColumns 编辑

The nsITreeColumns interface represents the tree columns.

Inherits from: nsISupports

Method overview

Attributes

Methods

getColumnAt()

Get the column for a given index.

nsITreeColumn getColumnAt(
  in long index
);

Parameters

index

Index of the column

Return value

A nsITreeColumn for this index.

getColumnFor()

Get the column for a given element.

nsITreeColumn getColumnFor(
  in nsIDOMElement element
);

Parameters

element

A DOM element

Return value

A nsITreeColumn for this element.

getFirstColumn()

Get the first column.

nsITreeColumn getFirstColumn();

Parameters

None.

Return value

The first nsITreeColumn.

getKeyColumn()

Get the key column.

nsITreeColumn getKeyColumn();

Parameters

None.

Return value

The key nsITreeColumn.

getLastColumn()

Get the last column.

nsITreeColumn getLastColumn();

Parameters

None.

Return value

The last nsITreeColumn.

getNamedColumn()

Get a column for a given name.

nsITreeColumn getNamedColumn(
  in AString id
);

Parameters

id

A column id

Return value

The nsITreeColumn for this id.

getPrimaryColumn()

Get the primary column.

nsITreeColumn getPrimaryColumn();

Parameters

None.

Return value

The primary nsITreeColumn.

getSortedColumn()

nsITreeColumn getSortedColumn();

Parameters

None.

Return value

A nsITreeColumn.

invalidateColumns()

This method is called whenever a treecol is added or removed and the column cache needs to be rebuilt.

void invalidateColumns();

Parameters

None.

restoreNaturalOrder()

Restore the original order of the columns before the user moved them.

void restoreNaturalOrder();

Parameters

None.

See also

• nsITreeColumn