[Overview][Constants][Types][Classes][Procedures and functions][Index] Reference for unit 'DbCtrls' (#lcl)

TDBLookupComboBox

[Properties (by Name)] [Methods (by Name)] [Events (by Name)]

TDBLookupComboBox - a dataware ComboBox for examining a lookup table from a database

Declaration

Source position: dbctrls.pp line 780

type TDBLookupComboBox = class(TCustomDBComboBox) end;

protected

  procedure CloseUp; override;

  procedure InitializeWnd; override;

  procedure DestroyWnd; override;

  procedure KeyDown(); override;

  procedure Loaded; override;

  procedure UpdateData(); override;

  

UpdateData - copies the local data from the corresponding entry from the lookup field

  procedure DataChange(); override;

  procedure Select; override;

public

  constructor Create(); override;

  

Create - constructor fro TDBLookupComboBox: calls inherited Create then makes lookup list, forms links

  property KeyValue: variant; [rw]

published

  property Align: TAlign;

  

Specifies the placement of the control inside its Parent.

  property Anchors: TAnchors;

  

The set of anchor definitions for this control.

  property ArrowKeysTraverseList: Boolean;

  

Allows the operator to use also the keyboard Arrow keys to move through the list.

  property AutoComplete: Boolean;

  property AutoDropDown: Boolean;

  

Makes the drop-down list appear as soon as the user starts entering text.

  property AutoSize: Boolean;

  

Allows to automatically adjust the size of the control, according to its content.

  property BiDiMode: TBiDiMode;

  property BorderSpacing: TControlBorderSpacing;

  

Determines the inner and outer border spacing for this control.

  property Color: TColor;

  

The background color of the control.

  property DataField: string;

  

The name (as a string) of the Feild whose data are to be linked to the ComboBox

  property DataSource: TDataSource;

  

The identity of the DataSource to which the ComboBox is attached

  property DragCursor: TCursor;

  

The cursor shape shown while the control is dragged.

  property DragMode: TDragMode;

  

Allows the user to drag the control.

  property DropDownCount: Integer;

  

The height of the drop-down list, measured in number of items.

  property Enabled: Boolean;

  

Determines whether the control reacts on mouse or keyboard input.

  property Font: TFont;

  

The font to be used for text display in this control.

  property KeyField: string; [rw]

  

KeyField the name of the field containing the key data

  property ListField: string; [rw]

  

ListField - the name of the field containing the list data

  property ListFieldIndex: Integer; [rw]

  

ListFieldIndex - the index value of the field containing the list

  property ListSource: TDataSource; [rw]

  

ListSource the data source that contains the list

  property LookupCache: Boolean; [rw]

  property NullValueKey: TShortCut; [rw]

  property OnChange: TNotifyEvent;

  

Event handler for user changed text in the edit box.

  property OnChangeBounds: TNotifyEvent;

  

Event handler for a change of the Bounds of the control.

  property OnClick: TNotifyEvent;

  

Notification handler for mouse clicks.

  property OnCloseUp: TNotifyEvent;

  

Handler invoked when the drop-down list closes.

  property OnDblClick: TNotifyEvent;

  

Event Handler for double mouse clicks.

  property OnDragDrop: TDragDropEvent;

  

This handler determines the action on an drop onto this control, in a drag-drop operation.

  property OnDragOver: TDragOverEvent;

  

Event handler for a control being dragged over this control.

  property OnDrawItem: TDrawItemEvent;

  

Handler for special painting of an item (in owner-draw mode).

  property OnDropDown: TNotifyEvent;

  

Handler invoked when the list has dropped down.

  property OnEditingDone: TNotifyEvent;

  

Event handler when editing is done.

  property OnEndDrag: TEndDragEvent;

  

Notification handler for the end of a dragging operation.

  property OnEnter: TNotifyEvent;

  

Handler for control receiving the focus.

  property OnExit: TNotifyEvent;

  

Handler for control loosing the focus. This is a good place for checking the finished user input.

  property OnKeyDown: TKeyEvent;

  

Handler for keyboard key pressed.

  property OnKeyPress: TKeyPressEvent;

  

Handler for a character entered by the user.

  property OnKeyUp: TKeyEvent;

  

Handler for keyboard key released.

  property OnMouseDown: TMouseEvent;

  

Event handler for mouse button going down.

  property OnMouseEnter: TNotifyEvent;

  property OnMouseLeave: TNotifyEvent;

  property OnMouseMove: TMouseMoveEvent;

  

Event handler for mouse movement within the control.

  property OnMouseUp: TMouseEvent;

  

Event handler for mouse button going up.

  property OnMouseWheel: TMouseWheelEvent;

  property OnMouseWheelDown: TMouseWheelUpDownEvent;

  property OnMouseWheelUp: TMouseWheelUpDownEvent;

  property OnSelect: TNotifyEvent;

  

Handler invoked when an item is selected.

  property OnStartDrag: TStartDragEvent;

  

Event handler for the start of a dragging operation.

  property OnUTF8KeyPress: TUTF8KeyPressEvent;

  

Handler for a character entered by the user.

  property ParentBiDiMode: Boolean;

  property ParentColor: Boolean;

  

If true, the Color of the control will be the same as the one from the Parent. Default is true.

  property ParentFont: Boolean;

  

If true, the Font of the control will be the same as the one from the Parent. Default is true.

  property ParentShowHint: Boolean;

  

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;

  

A context-sensitive menu that pops up when the right mouse button is clicked over this control

  property ReadOnly: Boolean;

  

Disallows entry of free text.

  property ScrollListDataset: Boolean; [rw]

  property ShowHint: Boolean;

  

Enables the Hint display.

  property Sorted: Boolean;

  

Determines whether the list entries are sorted.

  property Style: TComboBoxStyle;

  

Appearance and behaviour of the ComboBox (static/drop-down, owner-draw...).

  property TabOrder: TTabOrder;

  

Determines the sequence of controls, reachable when the user presses the Tab key.

  property TabStop: Boolean;

  

Allows the user to navigate to this control, by pressing the Tab key.

  property Visible: Boolean;

  

Allows to show or hide the control, and all of its children.

Inheritance

TDBLookupComboBox

  

TDBLookupComboBox - a dataware ComboBox for examining a lookup table from a database

|

TCustomDBComboBox

  

TCustomDBComboBox - a Data-aware Combo Box for displaying information from a Database

|

TCustomComboBox

  

The base class for ComboBox components.

|

TWinControl

  

The base class for controls which can contain other (child) controls.

|

TControl

  

The base class for visible controls.

|

TLCLComponent

  

The base class for LCL components associated with widgets.

|

TComponent

?

TObject

See also

HowToUseDataAwareControls

  

HowToUseDataAwareControls - Hints for accessing databases

The latest version of this document can be found at lazarus-ccr.sourceforge.net.