nsIAccessibleTreeCache 编辑

Obsolete since Gecko 1.9.2 (Firefox 3.6 / Thunderbird 3.1 / Fennec 1.0)
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

A private interface to operate with tree accessible.

accessible/public/nsIAccessibleTreeCache.idlNot scriptable Please add a summary to this article.   Last changed in Gecko 1.9.1 (Firefox 3.5 / Thunderbird 3.0 / SeaMonkey 2.0)

Inherits from: nsISupports

Method overview

nsIAccessible getCachedTreeitemAccessible(in long aRow, in nsITreeColumn aColumn);

void invalidateCache(in long aRow, in long aCount);

void treeViewChanged();

void treeViewInvalidated(in long aStartRow, in long aEndRow, in long aStartCol, in long aEndCol);

Methods

getCachedTreeitemAccessible()

Returns the tree item from the cache for the cell in the specified row and column; the nsIAccessible is created if it doesn't already exist in the cache.

nsIAccessible getCachedTreeitemAccessible(
  in long aRow,
  in nsITreeColumn aColumn
);

Parameters

aRow

The row index.

aColumn

The column object. If is is null then the primary column is used. It makes sense for ATK only.

Return value

The nsIAccessible corresponding to the specified tree cell.

invalidateCache()

Invalidates the number of cached treeitem accessibles.

void invalidateCache(
  in long aRow,
  in long aCount
);

Parameters

aRow

Row index the invalidation starts from.

aCount

The number of treeitem accessibles to invalidate, the number sign specifies whether rows have been inserted (plus) or removed (minus)

treeViewChanged()

Invalidates children created for the previous tree view.

void treeViewChanged();

Parameters

None.

treeViewInvalidated()

Fires name change events for invalidated area of tree.

void treeViewInvalidated(
  in long aStartRow,
  in long aEndRow,
  in long aStartCol,
  in long aEndCol
);

Parameters

aStartRow

Row index invalidation starts from.

aEndRow

Row index invalidation ends, -1 means the last row index.

aStartCol

Column index invalidation starts from.

aEndCol

Column index invalidation ends, -1 means the last column index.