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- Interrupting <TreeView>.ListItem
<TreeView>.ListItem (Function) Lists the "children" of a node and the "child" elements of these "children" in a TreeView control. A WLanguage procedure is called whenever a "child" element is found. Example of TreeView control:
// List the "children" of the "Desserts" node in the "TREE_TVRecipe" TreeView
// The "ExpandAll" procedure is called
// for each "child" element found in the "Desserts" node
Res = TREE_TVRecipe.ListItem("Recipes" + TAB+ "Desserts", "ExpandAll")
Sintaxis
<Result> = <TreeView control>.Threadlist(<Node path> , <WLanguage procedure> [, <Custom parameter> [, <Duplicate identifier>]])
<Result>: Integer Number of listed elements. <TreeView control>: Control name Name of the TreeView control to be used. <Node path>: Character string Full path of node from which the elements will be listed. This parameter:- has the following format:
"<Root name>" + TAB + ["<Name of 1st node>" + TAB + ...
["<Name of 2nd node>" + TAB + [...]]]"<Leaf name>" - corresponds to the NULL constant to list from the root of TreeView control.
<WLanguage procedure>: Procedure name Name of WLanguage procedure that will be called whenever a "child" element is found.
For more details on this procedure, see Parameters of the procedure used by <TreeView>.ListItem. <Custom parameter>: Optional integer Parameter passed to <WLanguage procedure>. <Duplicate identifier>: Optional boolean Indicates the management mode of duplicates in the elements:- False (default): no management is performed.
- True: path element names are constructed to contain their identifiers.
Observaciones Interrupting <TreeView>.ListItem <TreeView>.ListItem cannot be interrupted as long as all "child" elements have not been browsed. To force the interruption of the browse performed by <TreeView>.ListItem, use the following line of code in <WLanguage procedure>: In this case, <TreeView>.ListItem returns the number of elements browsed until the call to "RESULT False".
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