TTreeNode

type TTreeNode = class(TPersistent)

protected

  function GetOwner; override;

public

  constructor Create();

calls inherited then itntialises indexes and sets subtree count to 1

  function AlphaSort;

AlphaSort - if True, sorted alphabetically

  procedure Assign(); override;

Assign - if Source is of correct type, copies details directly, otherwise calls inherited Assign which probably raises an exception

  procedure Collapse();

Collapse - method for collapsing tree view to show only the main stems. Apply recursively if Recurse is True

  function CustomSort();

CustomSort - if True, the customised sort method specified in SortProc is to be used

  function DefaultTreeViewSort();

DefaultTreeViewSort - returns result of string comparison between names of Node1 and Node2

  procedure Delete;

Delete the curent TreeNode

  procedure DeleteChildren;

DeleteChildren - remove the descendent Nodes in the tree structure

  destructor Destroy; override;

- destructor for : unbinds all references, frees data and calls inherited Destroy

  function DisplayExpandSignLeft;

DisplayExpandSignLeft - returns the position of the left edge of the expand sign

  function DisplayExpandSignRect;

DisplayExpandSignRect - returns the coordinates of the rectangle within which the expand sign are displayed

  function DisplayExpandSignRight;

DisplayExpandSignRight - returns the position of the right edge of the expand sign (ie takes into account the width of the icon etc)

  function DisplayIconLeft;

DisplayIconLeft - returns the position of the actual icon for the expand sign (usually 1 pixel greater than DisplayExpandSignLeft)

  function DisplayRect();

DisplayRect - returns the coordinates of the rectangle containing the current entry; if TextOnly is True, returns the coordinates for the text

  function DisplayStateIconLeft;

DisplayStateIconLeft - returns the position of the State Icon

  function DisplayTextLeft;

DisplayTextLeft - returns the position of the left edge of the text

  function DisplayTextRight;

DisplayTextRight - returns the position of the right edge of the text

  function EditText;

EditText (currently set False - to be implemented)

  procedure EndEdit();

EndEdit (to be implemented)

  procedure Expand();

Expand - method for expanding the current node. If Recurse is True, also expand all descendent nodes

  procedure ExpandParents;

ExpandParents - apply expansion to the parents of the current node

  function Bottom;

Bottom - returns the position of the displayed tree structure (whether or not it is expanded)

  function BottomExpanded;

BottomExpanded - returns the position of the bottom of the fully expanded tree structure

  function GetParentNodeOfAbsoluteLevel();

GetParentNodeOfAbsoluteLevel - returns the parent of all nodes at this absolute level

  function GetFirstChild;

GetFirstChild - returns the first child node of this parent

  function GetHandle;

GetHandle - returns the operating system Handle for the current node

  function GetLastSibling;

GetLastSibling - returns the last node at the same level as the current node

  function GetLastChild;

GetLastChild - returns the last child node of this parent

  function GetLastSubChild;

GetLastSubChild - returns the last sub-child node of this parent

  function GetNext;

GetNext - returns the next node in the list

  function GetNextChild();

GetNextChild - returns the next child node of the parent specified by AValue

  function GetNextExpanded;

GetNextExpanded - returns the next expanded node

  function GetNextMultiSelected;

GetNextMultiSelected - returns the next node in a multiselection

  function GetNextSibling;

GetNextSibling - returns the next node in the same level as the current node

  function GetNextVisible;

GetNextVisible - returns the next visible (ie not hidden) node

  function GetPrev;

GetPrev - returns the previous node in the list

  function GetPrevChild();

GetPrevChild - returns the previous child node of the parent specified by AValue

  function GetPrevExpanded;

GetPrevExpanded - returns the previous expanded node

  function GetPrevMultiSelected;

GetPrevMultiSelected - returns the previous node in a multi-selection

  function GetPrevSibling;

GetPrevSibling - returns the previous node in the same level as the current node

  function GetPrevVisible;

GetPrevVisible - returns the previous visible (not hidden) node

  function HasAsParent();

HasAsParent - returns True if the node specified by AValue has a parent

  function IndexOf();

IndexOf - returns the index of the node specified by AValue

  function IndexOfText();

IndexOfText - returns the index of the node containing the specified Text string

  function FindNode();

FindNode - returns the node containing the specified text string

  function GetTextPath;

GetTextPath - returns a string containing the path to the current node

  procedure MakeVisible;

MakeVisible - method for rendering a node visible

  procedure MoveTo(); virtual;

MoveTo - method for relocating a node to the specified Destination using the specified mode of attachment

  procedure MultiSelectGroup;

MultiSelectGroup - method for multi-selecting a group of nodes

  procedure Update;

Update the contents and appearance of the curent node

  procedure ConsistencyCheck;

ConsistencyCheck - makes sure all references to and from the node are consistent

  procedure WriteDebugReport();

WriteDebugReport - for debugging. If Recurse is True, report for all descendants as well

  property AbsoluteIndex: Integer; [r]

AbsoluteIndex - the absolute index of the current node, ie without taking into account the level of ancestry

  property Count: Integer; [r]

Count - the number of nodes

  property Cut: Boolean; [rw]

Cut - whether the node has been Cut

  property Data: Pointer; [rw]

Data - pointer to th eNode's data

  property Deleting: Boolean; [r]

Deleting - if True, the node is being deleted

  property Focused: Boolean; [rw]

Focused - if True, the node has received focus

  property DropTarget: Boolean; [rw]

DropTarget - if True, the current node is a target for a drop process

  property Expanded: Boolean; [rw]

Expanded - if True, the node has been expanded

  property Handle: THandle; [r]

Handle - the operating system handle for this node

  property HasChildren: Boolean; [rw]

HasChildren - if true, this node has descendent nodes

  property Height: Integer; [rw]

The Height of the current node

  property ImageIndex: TImageIndex; [rw]

ImageIndex - the index of the image associated with the current node. Default -1 if no image

  property Index: Integer; [rw]

The Index value of the current node

  property IsVisible: Boolean; [r]

IsVisible - if True, the current node is visible (not hidden)

  property IsFullHeightVisible: Boolean; [r]

IsFullHeightVisible - if True, the full height of the TreeNode is visible within the display window

  property Items: TTreeNode; default; [rw]

Items - the index of the current node within the list of items

  property Level: Integer; [r]

The Level of descendance of indentation of the current node

  property MultiSelected: Boolean; [rw]

MultiSelected - if True, several nodes have been selected simultaneously (eg using the Shift or Ctrl key while selecting)

  property OverlayIndex: Integer; [rw]

OverlayIndex - the index of the overlay

  property Owner: TTreeNodes; [r]

The Owner control of the current TreeNode

  property Parent: TTreeNode; [r]

The Parent of the current node

  property Selected: Boolean; [rw]

Selected - if True, the current node has been selected

  property SelectedIndex: Integer; [rw]

SelectedIndex - the index of the current node if selected: default - if not selected

  property SubTreeCount: Integer; [r]

SubTreeCount - the number of sub-trees

  property StateIndex: Integer; [rw]

StateIndex the index of the state (within an enumerated type)

  property Text: String; [rw]

The Text string of the current node

  property TreeNodes: TTreeNodes; [r]

the collection of TreeNodes to which this node belongs

  property TreeView: TCustomTreeView; [r]

The TreeView to which this node belongs

  property Top: Integer; [r]

The position of the Top of the current node

end;

TTreeNode

TTreeNode is a single item that holds data in TTreeView

TPersistent

TObject

#lcl.stdctrls.HowToUseStdCtrls

How to use StdCtrls, ComCtrls or ExtCtrls