[Overview][Constants][Types][Classes][Procedures and functions][Index] |
[Properties (by Name)] [Methods (by Name)] [Events (by Name)]
TDBGroupBox - a data-aware version of TGroupBox, allowing a number of data-aware objects to be grouped together on a form.
Source position: dbctrls.pp line 1080
type TDBGroupBox = class(TCustomGroupBox) |
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protected |
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procedure DataChange(); |
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Updates the value for the control when the linked dataset is changed. |
procedure Notification(); override; |
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Handles a notification when a component is added to or removed from the control. |
public |
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constructor Create(); override; |
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Constructor for the class instance. |
destructor Destroy; override; |
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Destructor for the class instance. |
function ExecuteAction(); override; |
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Provides support for TBasicAction in the control. |
function UpdateAction(); override; |
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Updates the specified action to reflect the current state in the linked dataset. |
property Field: TField; [r] |
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The Field to which the datalink is attached. |
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 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. |
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Text displayed as the caption for the control. |
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property ClientHeight: Integer; |
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The height of the client area of the control. |
property ClientWidth: Integer; |
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The width of the client area of the control. |
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The background color of the control. |
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property Constraints: TSizeConstraints; |
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The minimum and maximum Width and Height for the control. |
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The shape of the mouse pointer, when the mouse is over this control. |
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property DataField: string; [rw] |
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Contains the name of the field with the value for the control. |
property DataSource: TDataSource; [rw] |
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Provides access to the dataset with content for the control. |
property DoubleBuffered: Boolean; |
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Allows to reduce flicker in the painting of the control. |
property DragCursor: TCursor; |
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The cursor shape shown while the control is dragged. |
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The operation when the control is dragged - Drag or Dock. |
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Allows the user to drag the control. |
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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 OnClick: TNotifyEvent; |
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Notification handler for mouse clicks. |
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 OnEndDrag: TEndDragEvent; |
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Notification handler for the end of a dragging operation. |
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. |
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Event handler signalled when a key is down while the control has focus. |
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property OnKeyPress: TKeyPressEvent; |
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Event handler signalled when a key is being pressed while the control has focus. |
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Event handler signalled when a key is up (not pressed) while the control has focus. |
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property OnMouseDown: TMouseEvent; |
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Event handler for mouse button going down. |
property OnMouseEnter: TNotifyEvent; |
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Event handler for mouse entering the area of the control. |
property OnMouseLeave: TNotifyEvent; |
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Event handler for mouse leaving the area of the control. |
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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Event handler for mouse wheel turned. |
property OnMouseWheelDown: TMouseWheelUpDownEvent; |
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Event handler for downward movement of mouse wheel. |
property OnMouseWheelUp: TMouseWheelUpDownEvent; |
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Event handler for upward movement of the mouse wheel. |
property OnResize: TNotifyEvent; |
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Notification handler for a resize of the control. |
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 in the Parent control. Default is true. |
property ParentColor: Boolean; |
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Use the Color from the Parent control, when enabled. |
property ParentDoubleBuffered: Boolean; |
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Value from the DoubleBuffered property in a Parent control. |
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 ShowHint: Boolean; |
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Enables the Hint display. |
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Determines the sequence of control navigation 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. |
property Visible: Boolean; |
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Indicates if the control is visible on its parent. |
end; |
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TDBGroupBox - a data-aware version of TGroupBox, allowing a number of data-aware objects to be grouped together on a form. |
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The base class for TGroupBox, TRadioGroup and TCheckGroup. |
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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 which have an associated widget. |
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TComponent |
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TObject |
TDBGroupBox is a TCustomGroupBox descendant which implements a data-aware container for visual controls. A typical use case would involve using a database table where records contain one field which defines the group box caption, while other fields provide the values for additional data-aware controls.
Like other data-aware controls, TDBGroupBox contains both a DataSource and a DataField property which provides access to the linked dataset and the field with the caption for the control.
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The base class for TGroupBox, TRadioGroup and TCheckGroup. |
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HowToUseDataAwareControls - Hints for accessing databases. |
lazarus-ccr.sourceforge.net |