The TreeCombo class implements the TreeCombo development environment component that is used to display tree-like hierarchical structures as comboboxes.
Property name | Brief description | |
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AnimationType | The AnimationType property determines the type of animation that is used when the component list is expanded. |
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AutoUpdateInfo | The AutoUpdateInfo property determines whether the information about selection in the component editor is updated automatically. |
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CancelOnEscape | The CancelOnEscape property determines whether the set selection is canceled, and the list is closed on pressing the ESC key. |
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CloseOnClick | The CloseOnClick property determines whether the list is automatically closed when one of the elements is selected with a mouse click. |
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CloseOnEnter | The CloseOnEnter property determines whether the list is closed, and the selection is saved on pressing the ENTER key. |
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CustomMultiselectText | The CustomMultiselectText property determines whether a custom template is used to form component text on multiple selection. |
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CustomMultiselectTextTemplate | The CustomMultiselectTextTemplate property determines the template, according to which component text will be formed on multiple selection. |
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Dropped | The Dropped property returns whether the drop-down list is visible. |
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DroppedListHeight | The DroppedListHeight property determines height of the drop-down list of the component. |
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DroppedListWidth | The DroppedListWidth property determines width of the drop-down list of the component. |
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DroppedPopupMenu | The DroppedPopupMenu property determines the context menu that is opened in the area of the drop-down list of the component. |
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FilterStyle | The FilterStyle property determines a mode of building the filtered elements tree. |
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FindEditVisible | The FindEditVisible property determines whether the search field is displayed when the drop-down list of component is expanded. |
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ShowEditImage | The ShowEditImage property determines whether the element icon is displayed in the component editor. |
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ShowSystemHints | The ShowSystemHints property determines whether a system tooltip is displayed for various component elements. |
Property name | Brief description | |
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AdjustWidthOnlyVisible | The AdjustWidthOnlyVisible property determines the method of auto adjusting column width. |
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AutoCheckParent | The AutoCheckParent property determines whether the parent nodes of the component automatically receive an indefinite state, if not all of the child elements are selected. |
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BorderStyle | The BorderStyle property determines a style of the frame that outlines the component. |
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Checkboxes | The Checkboxes property determines whether component elements have checkboxes. |
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ColumnClick | The ColumnClick property determines whether column headers can be displayed as buttons. |
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Columns | The Columns property returns the component columns collection. |
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DropTargetNode | The DropTargetNode property determines the node of the component, over which user is dragging another node at the moment. |
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EnableFindDialog | The EnableFindDialog property determines whether pressing CTRL+F or F3 hot keys opens a standard dialog box of elements search. |
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FindMode | The FindMode property determines the mode of selection of found elements. |
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FocusedNode | The FocusedNode property determines the node that is focused at the moment. |
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GridLines | The GridLines property determines whether the grid is displayed. |
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HeaderMenu | The HeaderMenu property determines the context menu that opens on clicking the additional mouse button on the component column header. |
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HideSelection | The HideSelection property determines whether the selection is displayed in the component when the focus is passed to another component. |
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HighlightTrack | The HighlightTrack property determines whether to highlight element on mouse over. |
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HotTrack | The HotTrack property determines whether the element, over which the mouse cursor hovers, is underlined. |
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HotTrackAutoExpand | The HotTrackAutoExpand property determines whether the state of the child elements tree is changed on clicking on the selected element. |
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Images | The Images property determines a list of images displayed next to the elements of component tree. |
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InnerRoot | The InnerRoot property returns parameters of the inner root node of the tree. |
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Locked | The Locked property determines whether it is possible to change selection and edit element text in the component. |
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Nodes | The Nodes property returns the collection of component elements. |
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ReadOnly | The ReadOnly property determines whether text of elements of the TreeList component can be edited. |
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RowSelect | The RowSelect property determines whether it is necessary to highlight the whole string of the selected element. |
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Selected | The Selected property returns the last selected element of the tree. |
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Selection | The Selection property returns the selection of the elements tree. |
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SelectionMode | The SelectionMode property determines the mode of selection of component elements. |
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ShowButtons | The ShowButtons property determines whether the buttons of expanding and collapsing of the nodes child tree are displayed. |
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ShowColumnHeaders | The ShowColumnHeaders property determines whether column headers are displayed. |
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ShowHeaderButton | The ShowHeaderButton property determines whether to show the button that opens column headers menu. |
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ShowHints | The ShowHints property determines whether tooltips are displayed when the mouse hovers over elements. |
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ShowLines | The ShowLines property determines whether the line that connects the node with its children is displayed. |
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SortColumn | The SortColumn property determines index of the column, by which sorting is executed. |
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Sorted | The Sorted property determines whether it is possible to sort by the column specified in the SortColumn property. |
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SortType | The SortType property determines a type of sorting for the component. |
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StateImages | The StateImages property determines a list of images that are used to indicate the condition of component tree elements. |
Property name | Brief description | |
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Align | The Align property determines component alignment within its parent component. |
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AllowDrag | The AllowDrag property determines whether an object can be dragged from a component. |
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AllowDrop | The AllowDrop property determines whether a component can accept a dragged object. |
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Anchors | The Anchors property returns settings determining % of the resize for the current component when the parent component is resized. |
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Brush | The Brush property determines the brush that is used to fill the component area. |
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ClientHeight | The ClientHeight property determines the height of the client component area. |
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ClientWidth | The ClientWidth property determines the width of the client component area. |
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Color | The Color property determines a component background color. |
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Cursor | The Cursor property determines how the cursor looks like when is it hovered over a component during form execution. |
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Enabled | The Enabled property determines whether a component is available for the user. |
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Focused | The Focused property returns True if the focus is set to the component. |
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Font | The Font property determines parameters of the font that is used to display text in a component. |
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Height | The Height property determines component height in pixels. |
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HelpContext | The HelpContext property determines a unique index for a section of a context help for this component. |
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Hint | The Hint property determines a tooltip text displayed on hovering over a component. |
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HintTimeout | The HintTimeout property determines for how long a tooltip is displayed. |
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Left | The Left property determines a coordinate of the component left edge in pixels. |
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Parent | The Parent property determines a parent component. |
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ParentColor | The ParentColor property determines whether a component inherits the color of the parent component. |
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ParentFont | The ParentFont property determines whether a component uses the font of the parent component. |
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ParentShowHint | The ParentShowHint property determines when a tooltip is displayed. |
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PopupMenu | The PopupMenu property determines the context menu that opens when the component is clicked with the right mouse button. |
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Scrolls | The Scrolls property returns parameters of component's scrollbars. |
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ShowHint | The ShowHint property determines whether a tooltip is displayed when a component is hovered. |
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TabOrder | The TabOrder property determines a component position in a tab order. |
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TabStop | The TabStop property determines whether the component must be focused when the Tab button is pressed. |
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Text | The Text property determines a row identifying a component for the user. |
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Top | The Top property determines a coordinate of the component top edge in pixels. |
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Visible | The Visible property determines whether the component is displayed when a form is executed. |
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Width | The Width property determines horizontal size of a component in pixels. |
Property name | Brief description | |
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ComponentCount | The ComponentCount property returns the number of child components located on the parent component. |
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Components | The Components property returns the child component, which index is passed by the input parameter. |
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Data | The Data property is used to store any custom data. |
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Name | The Name property determines a component name. |
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Tag | The compiler does not use the Tag property. The user can change the value of the Tag property and use it as he wishes. |
Method name | Brief description | |
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AdjustDroppedListWidth | The AdjustDroppedListWidth property adjusts width of the component's drop-down list. |
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DropDown | The DropDown property expands the combobox. |
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RollUp | The RollUp method collapses the drop-down list. |
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UpdateInfo | The UpdateInfo method updates information about elements selection that is displayed in the component editor. |
Method name | Brief description | |
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AdjustWidth | The AdjustWidth method automatically adjusts width of the column taking into account its contents. |
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GetItemAt | The GetItemAt method checks if there is an element in the specified point of client component area. |
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HitTest | The HitTest method checks if there is an element in the specified point of client component area and returns check result. |
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Sort | The Sort method sorts elements of the specified column in the specified direction. |
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SortDefault | The SortDefault method executes ascending sorting of component elements. |
Method name | Brief description | |
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ClientToScreen | The ClientToScreen method converts point coordinates specified relative to the component's coordinate system into screen coordinates. |
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DoDragDrop | The DoDragDrop method enables the user to start dragging operation. |
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GetImage | The GetImage method returns a graphic presentation of a component together with all child components. |
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ScreenToClient | The ScreenToClient method converts point's screen coordinates into coordinates specified relative to the component's coordinate system. |
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SetFocus | The SetFocus method sets focus to this component. |
Event name | Brief description | |
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OnBeginFilter | The OnBeginFilter event occurs at the start of filtering of component elements list. |
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OnDropDown | The OnDropDown event occurs on expanding the component list. |
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OnFilter | The OnFilter event occurs after the components list is filtered. |
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OnRollUp | The OnRollUp event occurs on collapsing the component list. |
Event name | Brief description | |
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OnBeginSearch | The OnBeginSearch event occurs when elements are started to be searched in the component. |
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OnAdded | The OnAdded event occurs when a new element is added. |
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OnChecked | The OnChecked event occurs after checkbox state of the element is changed. |
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OnChecking | The OnChecking event occurs before the checkbox state of the element is changed. |
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OnCollapsed | The OnCollapsed event occurs after the child hierarchy of the tree node is collapsed. |
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OnCollapsing | The OnCollapsing event occurs before the child hierarchy of the tree node is collapsed. |
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OnColumnClick | The OnColumnClick event occurs on clicking the component column header. |
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OnCompareItems | The OnCompareItems event occurs when two elements are compared during the custom sorting of elements. |
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OnDeleting | The OnDeleting event occurs when the element is removed. |
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OnEdited | The OnEdited event occurs on exiting the edit mode of field contents of the current component record. |
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OnEditing | The OnEditing event occurs on activating the edit mode of the field contents of the current component record. |
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OnExpanded | The OnExpanded event occurs after the child hierarchy of the tree node is expanded. |
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OnExpanding | The OnExpanding event occurs before the child hierarchy of the tree node is expanded. |
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OnFocusedChanged | the OnFocusedChanged event occurs after the focus is passed to another node of the component. |
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OnFocusedChanging | The OnFocusedChanging event occurs before the focus is passed to another node of the component. |
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OnGetHint | The OnGetHint event occurs when a tooltip is displayed near the element, over which the mouse cursor has stopped. |
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OnGetNodeImage | The OnGetNodeImage event is used on determining the image near the tree element. |
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OnGetNodeStateImage | The OnGetNodeStateImage event is used on determining the state image near the tree element. |
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OnHover | The OnHover event occurs when the cursor hovers over the element and underlines it. |
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OnSearch | The OnSearch event occurs after the element search in the component is finished. |
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OnSelected | The OnSelected event occurs after selection of the node has been set. |
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OnSelecting | The OnSelecting event occurs before selection of the node is set. |
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OnSelectionChanged | The OnSelectionChanged event occurs when the selection of the node of the component is changed. |
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OnUnselected | The OnUnselected event occurs after the node has been deselected. |
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OnUnselecting | The OnUnselecting event occurs before the element is deselected. |
Event name | Brief description | |
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OnBeginDrag | The OnBeginDrag event occurs for a component, when the user starts to drag an object from the component. |
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OnClick | The OnlClick event occurs if the user clicks the component area. |
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OnControlMove | The OnControlMove event occurs when the component is moved. |
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OnControlResize | The OnControlResize event occurs when the component is resized. |
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OnDblClick | The OnDblClick event occurs if the user double-clicks the component area. |
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OnDragDrop | The OnDragDrop event occurs for the component if the user drops a dragged object over it. |
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OnDragEnter | The OnDragEnter event occurs when a dragged object enters the component area. |
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OnDragLeave | The OnDragLeave event occurs when a dragged object leaves component borders. |
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OnDragOver | The OnDragOver event occurs for the component when the user drags an object over it. |
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OnEnter | The OnEnter event occurs when the component receives focus. |
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OnExit | The OnExit event occurs when the component loses focus. |
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OnHScroll | The OnHScroll event occurs when horizontal scrollbar slider changes its position. |
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OnKeyDown | The OnKeyDown event occurs if the component is focused and a keyboard key is pressed. |
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OnKeyPress | The OnKeyPress event occurs if the component is focused when the user presses a character key. |
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OnKeyPreview | The OnKeyPreview event occurs prior to each event related to key pressing. |
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OnKeyUp | The OnKeyUp event occurs if the component is focused and the user releases any button previously pressed. |
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OnMouseDown | The OnMouseDown event occurs if the pointer is in the component area and a mouse key is pressed. |
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OnMouseEnter | The OnMouseEnter event occurs when the mouse cursor enters the component area. |
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OnMouseHover | The OnMouseHover event occurs when the mouse cursor is held in the component area. |
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OnMouseLeave | The OnMouseLeave event occurs when the mouse cursor leaves the component area. |
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OnMouseMove | The OnMouseMove event occurs when the mouse cursor moves over a component. |
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OnMouseUp | The OnMouseUp event occurs when the mouse button is released and the cursor is in the component area. |
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OnMouseWheel | The OnMouseWheel event occurs if the component is focused when the user rotates a mouse wheel. |
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OnVScroll | The OnVScroll event occurs when vertical scrollbar slider changes its position. |
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