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Event handler signalled to get the ordinal position for the image displayed on a tree node.
Source position: comctrls.pp line 3662
protected property TCustomTreeView.OnGetImageIndex : TTVExpandedEvent |
OnGetImageIndex is a TTVExpandedEvent property with the event handler signalled to get the index for an image displayed on a tree node. The index is an ordinal position in the Images assigned for the control. OnGetImageIndex allows a value assigned to the ImageIndex property in the tree node to be overridden, or set to a default value.
OnGetImageIndex is signalled (when assigned) from the DoPaintNode method. It occurs when the Icon for a node is drawn using the Images for the tree view control. It is not a signalled if Images has not been assigned (contains Nil).
Arguments to the event handler include:
The handler routine should select and assign a value to the ImageIndex property in Node; there is no way to provide the value as a separate argument or return value.
Use OnGetSelectedIndex to get the image index for the a selected node on the tree view control.
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Image list which holds icons for the tree nodes in Items. |
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Renders the specified tree node to the canvas for the control. |
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Implements the Paint method for the control. |
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Event handler signalled to get the ordinal position for the image displayed for a selected node on the tree view control. |
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Ordinal position for the image displayed for the node, or -1 when no image is assigned. |
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TTVExpandedEvent - generic event handling method for a Tree Node that has been expanded. |
| Version 3.2 | Generated 2024-02-25 | Home |