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Event handler signalled to get the class reference used to create new tree nodes.
Source position: comctrls.pp line 3651
protected property TCustomTreeView.OnCreateNodeClass : TTVCreateNodeClassEvent |
OnCreateNodeClass is signalled (when assigned) when the CreateNode method is executed for the tree view control.
OnCreateNodeClass occurs after the OnCustomCreateItem event handler has been signalled to get a TTreeNode for the purpose. If its return value is Nil, DoCreateNodeClass is called to signal OnCreateNodeClass. It is not signalled if a return value was assigned in the OnCustomCreateItem handler routine.
Sender contains the tree view control for the event handler.
NodeClass is used to return the class reference needed to create a new node for the control.
A new instance of the class type is created and added to the node collection in Items.
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CreateNode - creates a new node in a TreeView and returns its content. |
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Signals the OnCreateNodeClass event handler (when assigned). |
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The container with the TTreeNode instances for the control. |
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OnCustomCreateItem - event handler for custom item creation. |
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Adds or inserts a tree node as a sibling to a specified relative node. |
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Adds a node with the specified text and data at the same level as the sibling node. |
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Adds a child node with specified text and data to the parent node and returns the new node. |
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Adds a node with the specified text and data as the first node at the same level as the sibling node. |
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Adds a node with the specified text and data as the first child node in the parent node. |
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Creates or updates a tree node with the specified text and a pointer to data. |
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Implements a tree node displayed in a TTreeView control. |
| Version 3.2 | Generated 2024-02-25 | Home |