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The PickerTree control is a hierarchical drop-down list quite similar to a Windows
combo-box, but capable of showing a tree instead of a list. It also allows
to select more than one tree item, restrict which nodes are selectable,
and use different formats to display information.
You can freely download from these pages:
You can purchase the standard edition of this component from these pages or either
from our component
partners.
Warning
Due to a confirmed bug by Microsoft, documented by articles Q177996 and Q237286
at their knowledge base, the NodeCheck event of PickerTree version
1.1 may not be received when working into
the Visual Basic IDE. The event is correctly received when the
control is used by a program compiled to EXE.
Despite Microsoft's bug, the new version 1.5 of PickerTree works
around it. If you are a registered user of PickerTree 1.1,
please contact us
to obtain a free upgrade to 1.5.
More information
The control looks like this when closed:
The tree comes up by clicking the arrow button at the right of the text
box:
The MultiValue property allows to set whether the control will accept
multiple selection. In the following example, the property has been set to
True:
It may be
convenient for the PickerTree control to show the full names (or
"paths") of the selected nodes, that is, their names preceded by
the full names of their parent nodes. The UsePath property allows you to
control this behavior. You can also change the separator text used to
compose full names by using the TextSeparator property. The following
picture shows a PickerTree control with UsePath set to True and
TextSeparator set to ":".
Sometimes,
the semantics of the nodes may require that only leaf nodes (that is,
those with no child nodes) are selectable. The OnlyLeaves property lets
you change this behavior of the PickerTree control. The following picture
shows a PickerTree control with OnlyLeaves set to True. Notice that
checkboxes of non-leaf nodes are disabled, so only leaf nodes can be
selected.
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