TDBLookupComboBox

type TDBLookupComboBox = class(TCustomDBComboBox)

protected

  procedure InitializeWnd; override;

  procedure UpdateData(); override;

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

  procedure UpdateText; override;

UpdateText - if the link is active, copies local text from the lookup table, otherwise calls inherited UpdateText

public

  constructor Create(); override;

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

  property KeyValue: variant; [rw]

published

  property Align;

Used to align the control to the top, bottom, left or right of its client.

  property Anchors;

The set of anchor definitions for this control

  property ArrowKeysTraverseList;

ArrowKeysTraverseList - enables the operator to use the keyboard Arrow keys to move through the list as an alternative to using the mouse

  property AutoComplete;

  property AutoDropDown;

AutoDropDown - if True, the drop-down list appears as soon as the cursor moves over the text box

  property AutoSize;

Whether auto-size is to be used

  property BorderSpacing;

Determines the border spacing for this control

  property Color;

Determine the colour for the current control

  property DataField;

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

  property DataSource;

The identity of the DataSource to which the ComboBox is attached

  property DragCursor;

DragCursor - the style of cursor to be used during the Drag process

  property DragMode;

DragMode - whether manual or automatic

  property DropDownCount;

DropDownCount - number of entries in the drop-down list

  property Enabled;

Whether the control is Enabled (read/write). If not, it usually appears 'greyed-out'

  property Font;

The font to be used for text in this control (read/write).

  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;

OnChange - event handler for any change in properties of the combo box

  property OnChangeBounds;

Event handler for a change in bounds of the control

  property OnClick;

Event Handler for mouse click

  property OnCloseUp;

OnCloseUp - event handler for when the drop-down box is closed up again

  property OnDblClick;

Event Handle for mouse double-click

  property OnDragDrop;

Event handler for the drop of a control onto this control.

  property OnDragOver;

Event handler for the case when a control is dragged over another control

  property OnDrawItem;

OnDrawItem - event handler for when an entry is written to the Items list

  property OnDropDown;

OnDropDown - event handler for when the drop-down list appears

  property OnEditingDone;

Event handler when editing is done

  property OnEndDrag;

Event handler for the end of a dragging process

  property OnEnter;

OnEnter - event handler for when the mouse enters the control, and the control receives focus

  property OnExit;

OnExit - event handler for when the mouse leaves the control and it loses focus

  property OnKeyDown;

OnKeyDown - event handler for instance when key is down while control has focus

  property OnKeyPress;

OnKeyPress - event controller for a key being pressed while the control has focus. To properly handle national chars use UTF8KeyPress instead.

  property OnKeyUp;

OnKeyUp - event handler for instance when a key is up (not pressed) while the control has focus

  property OnMouseDown;

Event handler for when a mouse button is pressed down

  property OnMouseMove;

Event handler for mouse movement within the current control

  property OnMouseUp;

Event handler for when the mouse button is released, ie "up"

  property OnSelect;

Event handler when an item or some text is selected

  property OnStartDrag;

Event handler for start of dragging operation

  property OnUTF8KeyPress;

UTF8KeyPress - event controller for a key being pressed while the control has focus.

  property ParentColor;

ParentColor - should the control have the same colour as the parent? Default is true

  property ParentFont;

ParentFont - should the control use the same font as the parent? Default is true

  property ParentShowHint;

ParentShowHint - does the control adopt the same hinting behaviour as its parent? Default is true

  property PopupMenu;

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

  property ReadOnly;

ReadOnly - if True, information in the control can only be Read, not Written or Deleted

  property ShowHint;

Flag to determine: Is hint to be displayed for this control?

  property Sorted;

Sorted - whether the entries in the drop-down list have been sorted

  property Style;

Style : may be Simple, a single-line Drop-Down or a Drop-Down list, or some version drawn by the Owner

  property TabOrder;

The place this control occupies in the list of tabs

  property TabStop;

Is the control in the sequence of controls accessed by successive presses of the Tab key?

  property Visible;

Visible - can the control be seen?

end;

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

TCustomComboBox - the base class from which TComboBox is derived

TWinControl

TControl

TLCLComponent

TLCLComponent - base class for LCL components

TComponent,IUnknown,IInterfaceComponentReference

TPersistent

TObject

HowToUseDataAwareControls

HowToUseDataAwareControls - Hints for accessing databases