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[Properties (by Name)] [Methods (by Name)] [Events (by Name)]
A combination of an edit box and a (drop-down) list allowing one of several options to be chosen.
Source position: stdctrls.pp line 413
type TComboBox = class(TCustomComboBox) end; |
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published |
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Specifies the placement of the control inside its Parent. |
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The set of anchor definitions for this control. |
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property ArrowKeysTraverseList: Boolean; |
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Allows the operator to use also the keyboard Arrow keys to move through the list. |
property AutoComplete: Boolean; |
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Allows to select items from partial input, of the begin of the item text. |
property AutoCompleteText: TComboBoxAutoCompleteText; |
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Options for the behavior of the Auto-Complete feature. |
property AutoDropDown: Boolean; |
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Makes the drop-down list appear as soon as the user starts entering text. |
property AutoSelect: Boolean; |
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Selects the entire content of the edit box when the control receives the focus. |
property AutoSize: Boolean; |
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Allows to automatically adjust the size of the control, according to its content. |
property BidiMode: TBiDiMode; |
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Customization (of text controls) in bidirectional reading environments. |
property BorderSpacing: TControlBorderSpacing; |
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Determines the inner and outer border spacing for this control. |
property BorderStyle: TBorderStyle; |
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property CharCase: TEditCharCase; |
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Indicates how text is converted during input (upper, lower, or as entered). |
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The background color of the control. |
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property Constraints: TSizeConstraints; |
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The minimal and maximal Width and Height of this control. |
property DragCursor: TCursor; |
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The cursor shape shown while the control is dragged. |
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Allows the user to drag the control. |
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property DropDownCount: Integer; |
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The height of the drop-down list, measured in number of items. |
property Enabled: Boolean; |
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Determines whether the control reacts on mouse or keyboard input. |
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The font to be used for text display in this control. |
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property ItemHeight: Integer; |
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The default height of a list item. |
property ItemIndex: Integer; |
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The index of the currently selected item, -1 if none is selected. |
property Items: TStrings; |
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The list of all items in the control. |
property ItemWidth: Integer; |
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The minimum width of the items in the drop-down list. |
property MaxLength: Integer; |
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The maximum length of user input. |
property OnChange: TNotifyEvent; |
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Event handler for user changed text in the edit box. |
property OnChangeBounds: TNotifyEvent; |
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Event handler for a change of the Bounds of the control. |
property OnClick: TNotifyEvent; |
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Notification handler for mouse clicks. |
property OnCloseUp: TNotifyEvent; |
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Handler invoked when the drop-down list closes. |
property OnContextPopup: TContextPopupEvent; |
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Invoked when a context-sensitive pop-up menu is requested. |
property OnDblClick: TNotifyEvent; |
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Event Handler for double mouse clicks. |
property OnDragDrop: TDragDropEvent; |
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This handler determines the action on an drop onto this control, in a drag-drop operation. |
property OnDragOver: TDragOverEvent; |
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Event handler for a control being dragged over this control. |
property OnDrawItem: TDrawItemEvent; |
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Handler for special painting of an item (in owner-draw mode). |
property OnEndDrag: TEndDragEvent; |
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Notification handler for the end of a dragging operation. |
property OnDropDown: TNotifyEvent; |
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Handler invoked when the list has dropped down. |
property OnEditingDone: TNotifyEvent; |
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Event handler when editing is done. |
property OnEnter: TNotifyEvent; |
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Handler for control receiving the focus. |
property OnExit: TNotifyEvent; |
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Handler for control loosing the focus. This is a good place for checking the finished user input. |
property OnGetItems: TNotifyEvent; |
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Handler for keyboard key pressed. |
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property OnKeyPress: TKeyPressEvent; |
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Handler for a character entered by the user. |
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Handler for keyboard key released. |
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property OnMeasureItem: TMeasureItemEvent; |
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Handler invoked when the height of an item is required. |
property OnMouseDown: TMouseEvent; |
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Event handler for mouse button going down. |
property OnMouseEnter: TNotifyEvent; |
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property OnMouseLeave: TNotifyEvent; |
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property OnMouseMove: TMouseMoveEvent; |
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Event handler for mouse movement within the control. |
property OnMouseUp: TMouseEvent; |
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Event handler for mouse button going up. |
property OnMouseWheel: TMouseWheelEvent; |
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property OnMouseWheelDown: TMouseWheelUpDownEvent; |
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property OnMouseWheelUp: TMouseWheelUpDownEvent; |
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property OnSelect: TNotifyEvent; |
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Handler invoked when an item is selected. |
property OnStartDrag: TStartDragEvent; |
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Event handler for the start of a dragging operation. |
property OnUTF8KeyPress: TUTF8KeyPressEvent; |
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Handler for a character entered by the user. |
property ParentBidiMode: Boolean; |
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Allows to use the BiDiMode settings of Parent. Default is true. |
property ParentColor: Boolean; |
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If true, the Color of the control will be the same as the one from the Parent. Default is true. |
property ParentFont: Boolean; |
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If true, the Font of the control will be the same as the one from the Parent. Default is true. |
property ParentShowHint: Boolean; |
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If true, the value of ShowHint for the control will be the same as the one from the Parent. Default is true. |
property PopupMenu: TPopupMenu; |
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A context-sensitive menu that pops up when the right mouse button is clicked over this control |
property ReadOnly: Boolean; |
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Disallows entry of free text. |
property ShowHint: Boolean; |
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Enables the Hint display. |
property Sorted: Boolean; |
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Determines whether the list entries are sorted. |
property Style: TComboBoxStyle; |
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Appearance and behaviour of the ComboBox (static/drop-down, owner-draw...). |
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Determines the sequence of controls, reachable when the user presses the Tab key. |
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property TabStop: Boolean; |
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Allows the user to navigate to this control, by pressing the Tab key. |
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The string appearing in the edit box. |
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property Visible: Boolean; |
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Allows to show or hide the control, and all of its children. |
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A combination of an edit box and a (drop-down) list allowing one of several options to be chosen. |
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The base class for ComboBox components. |
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The base class for controls which can contain other (child) controls. |
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The base class for visible controls. |
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The base class for LCL components associated with widgets. |
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TComponent |
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TObject |
The Text property reflects the text entered into the edit box, or selected from the list.
The selectable values are kept in the Items list. Clicking on the ellipsis (...), next to Items in the Object Inspector, opens an editor which allows the designer to populate the Items list.
At run-time, the entry selected from the list replaces the text in the edit box, and ItemIndex holds the (zero-based) index number of the selected item.
If no value is selected from the drop-down list, the default text (if any) remains, or any information typed directly into Text will be returned, and ItemIndex takes the value of -1
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How to use StdCtrls, ComCtrls or ExtCtrls |
lazarus-ccr.sourceforge.net |