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

# TPanel

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

Implements a general purpose container which can hold other components.

## Declaration

Source position: extctrls.pp line 1174

`type TPanel = class(TCustomPanel)`
`published`
`property Align: TAlign;` |  | Specifies the placement of the control inside its Parent.
`property Alignment: TAlignment;` |  | Alignment - whether text is left or right justified, or centered.
`property Anchors: TAnchors;` |  | The set of anchor definitions for this control.
`property AutoSize: Boolean;` |  | Allows automatic adjustment of the size for the control, according to its content.
`property BorderSpacing: TControlBorderSpacing;` |  | Determines the inner and outer border spacing for this control.
`property BevelColor: TColor;` |  | Color used to draw bevels for the panel.
`property BevelInner: TPanelBevel;` |  | Determines the appearance of the Inner Bevel for the panel (whether raised, lowered, etc.).
`property BevelOuter: TPanelBevel;` |  | Determines the appearance of the Outer Bevel for the panel (whether raised, lowered, etc.).
`property BevelWidth: TBevelWidth;` |  | Width for a bevel on the panel in pixels.
`property BidiMode: TBiDiMode;` |  | Indicates whether text controls use in bi-directional reading.
`property BorderWidth: TBorderWidth;` |  | Width of the Border around the control; default is zero.
`property BorderStyle: TBorderStyle;` |  | Indicates the border style displayed around the control.
`property Caption: TCaption;` |  | The text displayed for the control.
`property ChildSizing: TControlChildSizing;` |  | Provides a grid (table) layout for the children of this control.
`property ClientHeight: Integer;` |  | The height for the client area on the control.
`property ClientWidth: Integer;` |  | The width of the client area for the control.
`property Color: TColor;` |  | Contains the background color for the panel.
`property Constraints: TSizeConstraints;` |  | Contains the minimum and maximum Width and Height for the control.
`property DockSite: Boolean;` |  | Allows controls to be drag-and-dock-ed into this control.
`property DoubleBuffered: Boolean;` |  | When enabled, it reduces flicker when the control is painted.
`property DragCursor: TCursor;` |  | The cursor shape shown during a drag operation.
`property DragKind: TDragKind;` |  | Indicates the action performed for a drag operation: drag-and-drop or drag-and-dock.
`property DragMode: TDragMode;` |  | Determines how a drag operation is started for the control.
`property Enabled: Boolean;` |  | Determines whether the control responds to mouse or keyboard input.
`property Font: TFont;` |  | The font to be used for text display in this control.
`property FullRepaint: Boolean;` |  | FullRepaint - if True, the panel needs to be fully repainted after each change.
`property ParentBackground: Boolean;` |  | Indicates if the background from the parent control is used to draw the background for the control.
`property ParentBidiMode: Boolean;` |  | Indicates whether the BiDiMode settings in the Parent control are used.
`property ParentColor: Boolean;` |  | Indicates if the control is drawn using the color in the parent control.
`property ParentDoubleBuffered: Boolean;` |  | Value for the DoubleBuffered property in a Parent control.
`property ParentFont: Boolean;` |  | Indicates if the Font from the Parent control is used in the control.
`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 ShowAccelChar: Boolean;`
`property ShowHint: Boolean;` |  | Enables Hint display for the control.
`property TabOrder: TTabOrder;` |  | Indicates the navigation order for the control when the user presses the Tab or Shift+Tab key.
`property TabStop: Boolean;` |  | Enables or disables navigation using the Tab key.
`property UseDockManager: Boolean;` |  | Determines whether a DockManager is used for this DockSite.
`property VerticalAlignment: TVerticalAlignment;` |  | Vertical alignment for the caption text displayed on the panel.
`property Visible: Boolean;` |  | Allows the control, and all of its children, to be displayed or hidden.
`property Wordwrap: Boolean;` |  | Indicates if the Caption can be word wrapped when painted.
`property OnChangeBounds: TNotifyEvent;` |  | Event handler signalled when the Bounds for the control have been changed.
`property OnClick: TNotifyEvent;` |  | Notification handler for mouse clicks.
`property OnContextPopup: TContextPopupEvent;` |  | Invoked when a context-sensitive pop-up menu is requested.
`property OnDockDrop: TDockDropEvent;` |  | Event handler signalled for the drop of a control to be docked.
`property OnDockOver: TDockOverEvent;` |  | Event handler signalled when a control is moved over a docksite; determines whether the drop event is accepted or rejected.
`property OnDblClick: TNotifyEvent;` |  | Event handler signalled when a mouse double click occurs in the control.
`property OnDragDrop: TDragDropEvent;` |  | Event handler signalled when an object is dropped onto the control.
`property OnDragOver: TDragOverEvent;` |  | Event handler signalled when a control is dragged over the control instance.
`property OnEndDock: TEndDragEvent;` |  | Event handler signalled for the end of a drag-dock operation.
`property OnEndDrag: TEndDragEvent;` |  | Event handler signalled for the end of a drag-drop operation.
`property OnEnter: TNotifyEvent;` |  | Event handler signalled when the control receives focus.
`property OnExit: TNotifyEvent;` |  | Event handler signalled when the control loses focus.
`property OnGetSiteInfo: TGetSiteInfoEvent;` |  | Provides information about the DockSite for the control.
`property OnGetDockCaption: TGetDockCaptionEvent;` |  | This handler can provide a special DockCaption, different than the Caption default.
`property OnMouseDown: TMouseEvent;` |  | Event handler signalled when a mouse down event is handled for the control.
`property OnMouseEnter: TNotifyEvent;` |  | Event handler signalled when the mouse pointer has entered the control.
`property OnMouseLeave: TNotifyEvent;` |  | Event handler signalled when the mouse pointer has left the control.
`property OnMouseMove: TMouseMoveEvent;` |  | Event handler signalled when the mouse pointer is moved in the control.
`property OnMouseUp: TMouseEvent;` |  | Event handler signalled when a mouse up event is handled for the control.
`property OnMouseWheel: TMouseWheelEvent;` |  | Event handler for mouse wheel turned.
`property OnMouseWheelDown: TMouseWheelUpDownEvent;` |  | Event handler signalled for a downward movement of the mouse wheel.
`property OnMouseWheelUp: TMouseWheelUpDownEvent;` |  | Event handler signalled for an upward movement of the mouse wheel.
`property OnMouseWheelHorz: TMouseWheelEvent;` |  | Event handler signalled for a horizontal movement of the mouse wheel.
`property OnMouseWheelLeft: TMouseWheelUpDownEvent;` |  | Event handler signalled for a leftward movement of the mouse wheel.
`property OnMouseWheelRight: TMouseWheelUpDownEvent;` |  | Event handler signalled for a rightward movement of the mouse wheel.
`property OnPaint: TNotifyEvent;` |  | Event handler signalled to paint the control.
`property OnResize: TNotifyEvent;` |  | Notification handler for a resize of the control.
`property OnStartDock: TStartDockEvent;` |  | Event handler for the start of a docking operation.
`property OnStartDrag: TStartDragEvent;` |  | Event handler signalled for the start of a dragging operation.
`property OnUnDock: TUnDockEvent;` |  | Event handler signalled before a control is undocked from its DockSite.
`end;`

## Inheritance

`TPanel` |  | Implements a general purpose container which can hold other components.
`TCustomPanel` |  | The base class for a general container which can hold other objects. It has a customizable border and a central text.
`TCustomControl` |  | The base class for windowed controls which paint themselves.
`TWinControl` |  | Implements a windowed control which can contain other child controls.
`TControl` |  | The base class for visible controls.
`TLCLComponent` |  | The base class for LCL components which have an associated widget.
`TComponent`
?
`TObject`

## Description

TPanel is a TCustomPanel descendant which defines a rectangular area on a form into which components can be placed to group them functionally and geographically. TPanel is a general container for other components, and has a customizable border and caption.

## See also

TCustomPanel |  | The base class for a general container which can hold other objects. It has a customizable border and a central text.