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

TDBListBox

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

TDBListBox - a data-aware version of TListBox, for displaying lists of entries from a field in a database

Declaration

Source position: dbctrls.pp line 260

type TDBListBox = class(TCustomListBox)

  FDataLink: TFieldDataLink;

  

  procedure DataChange();

  

  procedure EditingChange();

  

  procedure UpdateData();

  

  procedure FocusRequest();

  

  function GetDataField;

  

  function GetDataSource;

  

  function GetField;

  

  procedure SetItems(); override;

  

  function GetReadOnly;

  

  procedure SetReadOnly();

  

  procedure SetDataField();

  

  procedure SetDataSource();

  

  procedure CMGetDataLink(); message;

protected

  procedure KeyDown(); override;

  

  procedure Loaded; override;

  

Called when the component has finished loading.

  procedure Notification(); override;

  

Called by components that are freed and which received a FreeNotification.

public

  constructor Create(); override;

  

Create a new instance of the Window Control

  destructor Destroy; override;

  

Destroy this instance of the Window Control, and return the resources used

  procedure Click; override;

  

Click - a procedure that allows the programmer to simulate a mouse click over the control, and initiates the same Action as that associated with the OnClick event

  procedure EditingDone; override;

  

EditingDone - what to do when you have finished editing

  property Field: TField; [r]

  

The Field of the DataSet for which data are to be displayed

published

  property DataField: String; [rw]

  

The name (as a string) of the Field for which data are to be displayed

  property DataSource: TDataSource; [rw]

  

The DataSource from which Field data are to be displayed - usually the results of a database query

  property Items; [w]

  

The array of strings representing the list of entries in the list box

  property ReadOnly: Boolean; [rw]

  

ReadOnly - if True, data can be seen and displayed but not writen or modified

  property Align;

  

Used to align the control in one of four directions.

  property Anchors;

  

The set of anchor definitions for this control

  property BorderSpacing;

  

Determines the border spacing for this control

  property BorderStyle;

  

BorderStyle - none, or single

  property DragCursor;

  

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

  property DragMode;

  

DragMode - whether manual or automatic

  property ExtendedSelect;

  

ExtendedSelect - boolean. Whether extended selection is allowed. Default True

  property ItemHeight;

  

ItemHeight - the height of the individual Items

  property MultiSelect;

  

MultiSelect - allows more than one Item from the list to be selected at a time, by pressing the CTRL or SHIFT key while selecting

  property OnClick;

  

Event Handler for mouse click

  property OnDblClick;

  

Event Handle for mouse double-click

  property OnDragDrop;

  

Event handler for the Drag-Drop manoeuvre

  property OnDragOver;

  

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

  property OnDrawItem;

  

OnDrawItem - event handler for drawing an Item

  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 OnKeyPress;

  

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

  property OnKeyDown;

  

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

  property OnKeyUp;

  

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

  property OnMouseMove;

  

Event handler for mouse movement within the current control

  property OnMouseDown;

  

Event handler for when a mouse button is pressed down

  property OnMouseUp;

  

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

  property OnResize;

  

Event Handler for resize of control

  property OnStartDrag;

  

Event handler for start of dragging process

  property OnUTF8KeyPress;

  property ParentShowHint;

  

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

  property ShowHint;

  

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

  property Sorted;

  

Sorted - whether the selected Items in the list have been arranged in alphabetical order

  property Style;

  

Style of List Box - normal, owner-draw fixed, or owner-draw variable

  property TabOrder;

  

The place this control occupies in the list of tabs

  property TabStop;

  

TabStop - determines if the user can tab to a control.

  property TopIndex;

  

Topindex - the highest value of Index in this list

  property Visible;

  

Visible - can the control be seen?

end;

Inheritance

TDBListBox

  

TDBListBox - a data-aware version of TListBox, for displaying lists of entries from a field in a database

|

TCustomListBox

?

TObject

See also

HowToUseDataAwareControls

  

HowToUseDataAwareControls - Hints for accessing databases