Delphi Ttreeview Learning (III.)--Ttreenode

Attributes to understand:

Absoluteindex	Property Absoluteindex:integer; Use Absoluteindex to determine absolute position the a node in a tree nodes object. The "the" in "a Tree" nodes object has an index of 0 and subsequent nodes are numbered. If a node has any children, it absoluteindex is one less than the index of the.
Count	Property Count:integer; Use Count to determine how many the child nodes belong to a tree node. Count includes only immediate children, and not their descendants. Count can is useful when iterating through the children of a tree node.
Cut-and	Property Cut:boolean; Use cut to alter the appearance of the "tree node" when it is selected as part of a cut and paste operation.
Data	Property data:pointer; Use the ' data ' to associate data with a tree node. Data allows applications to quickly access information about the entity represented by the node.
deleting	Property Deleting:boolean; Deleting returns True if the Node object is in the process of being deleted. Use deleting to prevent infinite recursion in event handlers.
DropTarget	Property Droptarget:boolean; Use DropTarget to indicate so the node is a drag and drop target. When DropTarget is true, the node was drawn in a style used to indicate a drag and drop target. Note:setting DropTarget to True does cause the node to automatically accept dragged the objects when they are. The application must still implement the drop behavior.
Expanded	Property Expanded:boolean; When a tree node is expanded, the minus button was shown if the Showbuttons property of the "tree" is true with child nod Es are displayed. Set Expanded to True to display the children of node. Set Expanded to False to collapse the node and hiding all of its descendants.
Focused	Property Focused:boolean; Tree view nodes are not windowed controls and so can ' t receive input focus. However, they can be edited by the ' user ' when the ' tree view ' control has focus. When focused is true, the node was surrounded by a standard focus rectangle and the user can edit the label. Use focused to determine if a particular node into a tree view can currently is edited by the user.
Handle	Property handle:hwnd; Use Handle to obtain the Handle of the "tree view" that owns the node. This handle can is passed as a parameter to Windows API function calls which require a handle to the "tree view."
HasChildren	Property Haschildren:boolean; HasChildren is true if the node has subnodes, or false if the node has no subnodes. If Showbuttons of the tree view is true, and HasChildren is true, a plus (+) button would appear to the left of the node wh En it is collapsed, and a minus (-) button would appear the node is expanded. Note:if a node has no children, setting HasChildren to True would show a (+) plus button, but would not add any child nodes And the node cannot be expanded.
ImageIndex	Property imageindex:timageindex; Use the "ImageIndex property" with the Images property of the ' tree view ' to specify ' image for the ' node in the ' normal stat E.
Index	Property index:longint; Use Index to determine the position of the node relative to its sibling nodes. The ' the ' parent node has an Index value of 0, and subsequent children are indexed sequentially.
IsVisible	Property Isvisible:boolean; A node is visible if it is in level 0 or if all it parents are expanded. IsVisible indicates whether the "node is" the current tree view image. It does not indicate whether or not the ' node is scrolled into view ' the ' tree view ' is larger than the size of the Tree view Control.
Item	Property Item[index:integer]: Ttreenode; Use Item to access a child node based on its Index. The ' the ' of the ' 0 ' of the ' has ', the ' second ' of index of 1, and.
ItemId	Property itemid:htreeitem; Use the reference the nodes when making Windows API calls or calling the GetNode T owns the item.
Level	Property Level:integer; The value of level are 0 for nodes at the top level. The value of level are 1 for their children, and.
Overlayindex	Property Overlayindex:integer; An overlay mask is a image drawn transparently over another image into the tree view. For example, to indicate so a node is no longer available, use a overlay image that puts a X over the current node ' I Mage.
Owner	Property owner:ttreenodes; Use the owner to determine the owner of the tree node. Don't confuse Owner with the TreeView property. Owner is the list of nodes used by the "tree view" to manage its nodes. The TreeView property is the "tree view" uses that list.
Parent	Property parent:ttreenode; A Parent node is one level higher than the node and contains the node as a subnode.
Selected	Property Selected:boolean; Set Selected to True to select the node. The appearance of a selected node depends on whether it has "focus and" whether the system colors are for select Ion. When a node becomes selected, the tree view's onchanging and onchanged events are triggered.
SelectedIndex	Property Selectedindex:integer; Use the SelectedIndex property to specify a image to display when the "tree node is selected."
Stateindex	Property Stateindex:integer; Use Stateindex to display a additional image for the node, reflects state information. If Stateindex Is-1 then no state image is drawn.
Text	Property text:string; Use Text to specify the string this is displayed into the tree view. The value of can assigned directly at Run-time or can is set within the TreeView Items Editor while modifying the The Items property of the Ttreeview component. If The tree view allows users to edit its nodes, read Text to determine the value given the node by the user.
Treeview	Property treeview:tcustomtreeview; Use TreeView to determine the "tree view associated" With the "tree node."