Developing Apama Applications > Building Dashboards > Reusing Dashboard Components > Working with multiple display panels > Using tree controls in panel displays > Specifying tree control properties > Descriptions of unique tree control property behavior
Descriptions of unique tree control property behavior
The following describes properties that behave uniquely with the tree control.
*valueColumnName - This property specifies the name of the column whose value should be assigned to the $value variable when a node in the tree is clicked. If not specified, the label string of the selected node is assigned to $value. Note that $value is the only substitution that can be used in the Display Name field of a drill-down command.
*mouseOverFlag - If this property is checked, a tooltip appears when the cursor is positioned over a leaf node. The tooltip shows the node path (the node label preceded by the labels of all of its ancestors), the node status (if the nodeStatusColumnName property is specified), and its value (if the valueColumnName property is specified).
*execOnLeafOnlyFlag - If this property is checked, the tree actionCommand property executes only when a leaf node is clicked (a click on a non-leaf node expands only the node). If unchecked, the tree actionCommand property executes on all nodes, not just the leaf.
*rootNodeLabel - This property specifies the tree root node (of which there is only one). By default, this property is blank and the root node is not visible.
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