Interface nsITreeViewType

Methods used by the drag feedback code to determine if a drag is allowable at the current location. To get the behavior where drops are only allowed on items, such as the mailNews folder pane, always return false when the orientation is not DROP_ON.

Called on the view when a cell in a non-selectable cycling column (e.g., unread/flag/etc.) is clicked.

Called on the view when a header is clicked.

Called when the user drops something on this view. The |orientation| param specifies before/on/after the given |row|.

A whitespace delimited list of properties for a given cell. Each property, x, that the view gives back will cause the pseudoclasses ::-moz-tree-cell(x), ::-moz-tree-row(x), ::-moz-tree-twisty(x), ::-moz-tree-image(x), ::-moz-tree-cell-text(x). to be matched on the cell.

The text for a given cell. If a column consists only of an image, then the empty string is returned.

The value for a given cell. This method is only called for columns of type other than |text|.

Called to get properties to paint a column background. For shading the sort column, etc.

The image path for a given cell. For defining an icon for a cell. If the empty string is returned, the :moz-tree-image pseudoelement will be used.

The level is an integer value that represents the level of indentation. It is multiplied by the width specified in the :moz-tree-indentation pseudoelement to compute the exact indendation.

Methods used by the tree to draw thread lines in the tree. getParentIndex is used to obtain the index of a parent row. If there is no parent row, getParentIndex returns -1.

A whitespace delimited list of properties. For each property X the view gives back will cause the pseudoclasses ::-moz-tree-cell(x), ::-moz-tree-row(x), ::-moz-tree-twisty(x), ::-moz-tree-image(x), ::-moz-tree-cell-text(x). to be matched on the pseudoelement ::moz-tree-row.

hasNextSibling is used to determine if the row at rowIndex has a nextSibling that occurs after the index specified by afterIndex. Code that is forced to march down the view looking at levels can optimize the march by starting at afterIndex+1.

Methods that can be used to test whether or not a twisty should be drawn, and if so, whether an open or closed twisty should be used.

isEditable is called to ask the view if the cell contents are editable. A value of true will result in the tree popping up a text field when the user tries to inline edit the cell.

isSeparator is used to determine if the row at index is a separator. A value of true will result in the tree drawing a horizontal separator. The tree uses the ::moz-tree-separator pseudoclass to draw the separator.

Specifies if there is currently a sort on any column. Used mostly by dragdrop to affect drop feedback.

Should be called from a XUL onselect handler whenever the selection changes.

setCellText is called when the contents of the cell have been edited by the user.

setCellValue is called when the value of the cell has been set by the user. This method is only called for columns of type other than |text|.

Called during initialization to link the view to the front end box object.

Called on the view when an item is opened or closed.