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XmIsTraversable(3) Library Functions Manual XmIsTraversable(3) NAME XmIsTraversable -- A function that identifies whether a widget can be tra- versed SYNOPSIS #include <Xm/Xm.h> Boolean XmIsTraversable( Widget widget); DESCRIPTION XmIsTraversable determines whether the specified widget is eligible to re- ceive focus through keyboard traversal. In general, a widget is eligible to receive focus when all of the following conditions are true: * The widget and its ancestors are not being destroyed, are sensitive, and have a value of True for XmNtraversalOn. * The widget and its ancestors are realized, managed, and (except for gadgets) mapped. If an application unmaps a widget that has its XmN- mappedWhenManaged resource set to True, the return value is unde- fined. * Some part of the widget's rectangular area is unobscured by the wid- get's ancestors, or some part of the widget's rectangular area is in- side the work window (but possibly outside the clip window) of a ScrolledWindow whose XmNscrollingPolicy is XmAUTOMATIC and whose XmN- traverseObscuredCallback is not NULL. Some widgets may not be eligible to receive focus even if they meet all these conditions. For example, most managers cannot receive focus through keyboard traversal. Some widgets may be eligible to receive focus under particular conditions. For example, a DrawingArea is eligible to receive focus if it meets the conditions above and has no child whose XmNtraversa- lOn resource is True. Note that when all widgets in a shell hierarchy have been made untraversa- ble, they are considered to have lost focus. When a widget in this hierar- chy is made traversable again, it regains focus. XmIsTraversable may return unexpected results when widget or its ancestors are overlapped by their siblings. widget Specifies the ID of the widget RETURN Returns True if the widget is eligible to receive focus through keyboard traversal; otherwise, returns False. RELATED XmGetVisibility(3) and XmProcessTraversal(3). XmIsTraversable(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN | RELATED
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