Volume 6A: Motif Programming Manual

The XmN-defaultActionCallback is invoked for the default action.

The default selection is activated when the user double clicks on a List item. The time interval between two

consecutive button clicks determines whether the clicks are interpreted as individual clicks or as a double click. You

can set or get the time interval using the XmN-doubleClickInterval resource. The value is stored as

milliseconds, so a value of 500 is half a second. If the resource is not set, the value of the multiClickTime

resource is used instead. This resource is a fundamental X resource that is understood by all X applications; it is not an

Xt or Motif toolkit resource. You should let the user specify the double−click interval in a resource file; the value

should be set using the more global multiClickTime resource.

13.5.2 Browse and Single Selection Callbacks

The browse and single selection modes only allow the selection of a single item. The browsing mode is regarded as a

simpler interface for the user. Interactively, browse selection allows the user to drag the selection over many items;

the selection is not made till the mouse button is released. In the single selection mode, the selection is made as soon

as the mouse button is pressed. For browse selection, the callback list associated with the

XmNbrowseSelectionCallback is used, while the XmNsingleSelectionCallback is used for the single

selection mode.

Keyboard traversal in the List is also different between the two modes. If the user uses the keyboard to ...