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TPanel class

In unit ExtCtrls

Implements a general purpose container which can hold other components.

Declaration

pascal
TPanel = class(TCustomPanel)

Inheritance

  1. TPanel
  2. TCustomPanel
  3. TCustomControl
  4. TWinControl
  5. TControl
  6. TLCLComponent
  7. TComponent
  8. TPersistent
  9. TObject

Descends from it: TCalculatorPanel

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

Properties

AlignpublishedSpecifies the placement of the control inside its Parent.
AlignmentpublishedAlignment - whether text is left or right justified, or centered.
AnchorspublishedThe set of anchor definitions for this control.
AutoSizepublishedAllows automatic adjustment of the size for the control, according to its content.
BorderSpacingpublishedDetermines the inner and outer border spacing for this control.
BevelColorpublishedColor used to draw bevels for the panel.
BevelInnerpublishedDetermines the appearance of the Inner Bevel for the panel (whether raised, lowered, etc.).
BevelOuterpublishedDetermines the appearance of the Outer Bevel for the panel (whether raised, lowered, etc.).
BevelWidthpublishedWidth for a bevel on the panel in pixels.
BidiModepublishedIndicates whether text controls use in bi-directional reading.
BorderWidthpublishedWidth of the Border around the control; default is zero.
BorderStylepublishedIndicates the border style displayed around the control.
CaptionpublishedThe text displayed for the control.
ChildSizingpublishedProvides a grid (table) layout for the children of this control.
ClientHeightpublishedThe height for the client area on the control.
ClientWidthpublishedThe width of the client area for the control.
ColorpublishedContains the background color for the panel.
ConstraintspublishedContains the minimum and maximum Width and Height for the control.
DockSitepublishedAllows controls to be drag-and-dock-ed into this control.
DoubleBufferedpublishedWhen enabled, it reduces flicker when the control is painted.
DragCursorpublishedThe cursor shape shown during a drag operation.
DragKindpublishedIndicates the action performed for a drag operation: drag-and-drop or drag-and-dock.
DragModepublishedDetermines how a drag operation is started for the control.
EnabledpublishedDetermines whether the control responds to mouse or keyboard input.
FontpublishedThe font to be used for text display in this control.
FullRepaintpublishedFullRepaint - if True, the panel needs to be fully repainted after each change.
ParentBackgroundpublishedIndicates if the background from the parent control is used to draw the background for the control.
ParentBidiModepublishedIndicates whether the BiDiMode settings in the Parent control are used.
ParentColorpublishedIndicates if the control is drawn using the color in the parent control.
ParentDoubleBufferedpublishedValue for the DoubleBuffered property in a Parent control.
ParentFontpublishedIndicates if the Font from the Parent control is used in the control.
ParentShowHintpublishedIf True, the value of ShowHint for the control will be the same as the one from the Parent. Default is True.
PopupMenupublishedA context-sensitive menu that pops up when the right mouse button is clicked over this control.
ShowAccelCharpublishedControls the display of accelerator or hot keys in the Caption for the panel.
ShowHintpublishedEnables Hint display for the control.
TabOrderpublishedIndicates the navigation order for the control when the user presses the Tab or Shift+Tab key.
TabStoppublishedEnables or disables navigation using the Tab key.
UseDockManagerpublishedDetermines whether a DockManager is used for this DockSite.
VerticalAlignmentpublishedVertical alignment for the caption text displayed on the panel.
VisiblepublishedAllows the control, and all of its children, to be displayed or hidden.
WordwrappublishedIndicates if the Caption can be word wrapped when painted.

Events

OnChangeBoundspublishedEvent handler signalled when the Bounds for the control have been changed.
OnClickpublishedNotification handler for mouse clicks.
OnContextPopuppublishedInvoked when a context-sensitive pop-up menu is requested.
OnDockDroppublishedEvent handler signalled for the drop of a control to be docked.
OnDockOverpublishedEvent handler signalled when a control is moved over a docksite; determines whether the drop event is accepted or rejected.
OnDblClickpublishedEvent handler signalled when a mouse double click occurs in the control.
OnDragDroppublishedEvent handler signalled when an object is dropped onto the control.
OnDragOverpublishedEvent handler signalled when a control is dragged over the control instance.
OnEndDockpublishedEvent handler signalled for the end of a drag-dock operation.
OnEndDragpublishedEvent handler signalled for the end of a drag-drop operation.
OnEnterpublishedEvent handler signalled when the control receives focus.
OnExitpublishedEvent handler signalled when the control loses focus.
OnGetSiteInfopublishedProvides information about the DockSite for the control.
OnGetDockCaptionpublishedThis handler can provide a special DockCaption, different than the Caption default.
OnMouseDownpublishedEvent handler signalled when a mouse down event is handled for the control.
OnMouseEnterpublishedEvent handler signalled when the mouse pointer has entered the control.
OnMouseLeavepublishedEvent handler signalled when the mouse pointer has left the control.
OnMouseMovepublishedEvent handler signalled when the mouse pointer is moved in the control.
OnMouseUppublishedEvent handler signalled when a mouse up event is handled for the control.
OnMouseWheelpublishedEvent handler for mouse wheel turned.
OnMouseWheelDownpublishedEvent handler signalled for a downward movement of the mouse wheel.
OnMouseWheelUppublishedEvent handler signalled for an upward movement of the mouse wheel.
OnMouseWheelHorzpublishedEvent handler signalled for a horizontal movement of the mouse wheel.
OnMouseWheelLeftpublishedEvent handler signalled for a leftward movement of the mouse wheel.
OnMouseWheelRightpublishedEvent handler signalled for a rightward movement of the mouse wheel.
OnPaintpublishedEvent handler signalled to paint the control.
OnResizepublishedNotification handler for a resize of the control.
OnStartDockpublishedEvent handler for the start of a docking operation.
OnStartDragpublishedEvent handler signalled for the start of a dragging operation.
OnUnDockpublishedEvent handler signalled before a control is undocked from its DockSite.

Inherited

From TCustomPanel (11)

AdjustClientRect CMParentColorChanged Create GetControlClassDefaultSize GetDefaultDockCaption Loaded Paint RealSetText SetParentBackground UpdateParentColorChange WSRegisterClass

From TCustomControl (7)

Canvas Destroy DestroyWnd FontChanged PaintWindow SetColor WMPaint

From TWinControl (219)

AddControl AlignControls AllAutoSized AutoAdjustLayout AutoSizeDelayed AutoSizeDelayedHandle AutoSizeDelayedReport AutoSizePhases BeginUpdateBounds BoundsLockCount BroadCast Brush BrushCreated CachedClientHeight CachedClientWidth CalculatePreferredSize CanFocus CanSetFocus CanTab ChangeScale ChildClassAllowed ChildHandlesCreated ChildKey ClientRectNeedsInterfaceUpdate CMBiDiModeChanged CMBorderChanged CMDoubleBufferedChanged CMEnabledChanged CMEnter CMExit CMParentDoubleBufferedChanged CMShowHintChanged CMShowingChanged CMVisibleChanged CNChar CNKeyDown CNKeyUp CNSysKeyDown CNSysKeyUp ContainsControl ControlAtPos ControlCount ControlKeyDown ControlKeyUp Controls ControlsAligned CreateBrush CreateDockManager CreateHandle CreateParams CreateParented CreateParentedControl CreateSubClass CreateWnd CustomAlignInsertBefore CustomAlignPosition DefaultHandler DefWndProc DesignerDeleting DestroyHandle DialogChar DisableAlign DoAddDockClient DoAdjustClientRectChange DoAlignChildControls DoAllAutoSize DoAutoSize DoChildSizingChange DockClientCount DockClients DockDrop DockManager DockOver DoConstraintsChange DoDockClientMsg DoDockOver DoDragMsg DoEnter DoExit DoFlipChildren DoFloatMsg DoGetDockCaption DoKeyDownBeforeInterface DoKeyPress DoKeyUpBeforeInterface DoRemainingKeyDown DoRemainingKeyUp DoRemoveDockClient DoSendBoundsToInterface DoSendShowHideToInterface DoSetBounds DoUnDock DoUndockClientMsg DoUTF8KeyPress EnableAlign EndUpdateBounds EraseBackground FinalizeWnd FindChildControl FindNextControl FixDesignFontsPPIWithChildren FixupTabList FlipChildren Focused FormEndUpdated GetAdjustedLogicalClientRect GetBorderStyle GetChildren GetChildrenRect GetClientOrigin GetClientRect GetControlIndex GetControlOrigin GetDeviceContext GetDockCaption GetEnumeratorControls GetEnumeratorControlsReverse GetMouseCapture GetParentHandle GetPreferredSizeClientFrame GetSiteInfo GetTabOrderList GetTextLen GetTopParentHandle Handle HandleAllocated HandleNeeded InitializeWnd InsertControl IntfGetDropFilesTarget IntfUTF8KeyPress Invalidate InvalidateBoundsRealized InvalidateClientRectCache InvalidatePreferredChildSizes IsClientHeightStored IsClientWidthStored IsControlMouseMsg IsFlipped IsResizing IsSpecialSubControl KeyDown KeyDownAfterInterface KeyDownBeforeInterface KeyPress KeyUp KeyUpAfterInterface KeyUpBeforeInterface LockRealizeBounds MainWndProc NotifyControls OnAlignInsertBefore OnAlignPosition OnKeyDown OnKeyPress OnKeyUp OnUTF8KeyPress PaintControls PaintHandler PaintTo ParentFormHandleInitialized ParentHandlesAllocated ParentWindow PerformTab RealGetText ReAlign RealizeBounds RealizeBoundsRecursive ReloadDockedControl RemoveControl RemoveFocus Repaint ScaleBy ScaleControls ScrollBy ScrollBy_WS SelectFirst SelectNext SendDialogChar SendMoveSizeMessages SetBorderStyle SetBounds SetChildZPosition SetControlIndex SetDockManager SetFocus SetShape SetTempCursor ShowControl Showing UnlockRealizeBounds Update UpdateControlState UpdateDockCaption UpdateShowing UTF8KeyPress VisibleDockClientCount WindowHandle WMChar WMContextMenu WMDestroy WMEnter WMEraseBkgnd WMExit WMKeyDown WMKeyUp WMKillFocus WMMove WMNotify WMSetFocus WMShowWindow WMSize WMSysChar WMSysKeyDown WMSysKeyUp WMWindowPosChanged WndProc WriteLayoutDebugReport WSSetText

From TControl (318)

AccessibleDescription AccessibleName AccessibleRole AccessibleValue Action ActionChange ActionLink ActiveDefaultControlChanged AddHandler AddHandlerOnBeforeDestruction AddHandlerOnChangeBounds AddHandlerOnEnabledChanged AddHandlerOnEnabledChanging AddHandlerOnKeyDown AddHandlerOnMouseWheel AddHandlerOnResize AddHandlerOnVisibleChanged AddHandlerOnVisibleChanging AdjustSize AnchorAsAlign AnchorClient AnchoredControlCount AnchoredControls AnchorHorizontalCenterTo AnchorParallel AnchorSame AnchorSide AnchorSideBottom AnchorSideChanged AnchorSideLeft AnchorSideRight AnchorSideTop AnchorToCompanion AnchorToNeighbour AnchorVerticalCenterTo AssignTo AutoSizing AutoSizingAll AutoSizingLockCount BaseBounds BaseParentClientSize BeforeDestruction BeforeDragStart BeginAutoDrag BeginAutoSizing BeginDrag BoundsChanged BoundsRect BoundsRectForNewParent BringToFront CalculateDockSizes CanAutoSize CaptureChanged CaptureMouseButtons ChangeBounds Changed CheckChildClassAllowed CheckNewParent CheckOnChangeBounds Click ClientOrigin ClientRect ClientToParent ClientToScreen CMChanged CMCursorChanged CMHintShow CMHitTest CMMouseEnter CMMouseLeave CMParentBiDiModeChanged CMParentFontChanged CMParentShowHintChanged CMSysFontChanged CMTextChanged CNPreferredSizeChanged ColorIsStored ConstrainedResize ControlFontClass ControlOrigin ControlState ControlStyle ControlToScreen CreateAccessibleObject CreateControlBorderSpacing CreateFloatingDockSite Cursor DblClick DefineProperties DesktopFont DisableAutoSizing DoAutoAdjustLayout DoBorderSpacingChange DoCallKeyEventHandler DoCallMouseWheelEventHandler DoCallNotifyHandler Dock Docked DockOrientation DockTrackNoTarget DoContextPopup DoDock DoEndDock DoEndDrag DoFixDesignFontPPI DoMouseDown DoMouseUp DoMouseWheel DoMouseWheelDown DoMouseWheelHorz DoMouseWheelLeft DoMouseWheelRight DoMouseWheelUp DoOnChangeBounds DoOnParentHandleDestruction DoOnResize DoOnShowHint DoScaleFontPPI DoStartDock DoStartDrag DragCanceled DragDrop Dragging DragOver EditingDone EnableAutoSizing EnabledChanged EnabledChanging EndAutoSizing EndDrag ExecuteCancelAction ExecuteDefaultAction FindSubComponent FixDesignFontsPPI Floating FloatingDockSiteClass ForeignAnchorSideChanged FormIsUpdating GetAccessibleObject GetAction GetActionLinkClass GetAnchorsDependingOnParent GetCachedText GetCanvasScaleFactor GetChildAccessibleObjectAtPos GetClientScrollOffset GetColorResolvingParent GetCursor GetDefaultColor GetDefaultHeight GetDefaultWidth GetDockEdge GetDragImages GetEnabled GetFloating GetFloatingDockSiteClass GetLogicalClientRect GetMousePosFromMessage GetPalette GetParentBackground GetParentComponent GetPopupMenu GetPreferredSize GetRGBColorResolvingParent GetScrolledClientRect GetSelectedChildAccessibleObject GetSidePosition GetTextBuf GetTopParent HandleObjectShouldBeVisible HasHelp HasParent Height HeightIsAnchored HelpContext HelpKeyword HelpType Hide Hint HostDockSite InitiateAction InvalidateControl InvalidatePreferredSize IsAParentAligning IsBorderSpacingInnerBorderStored IsCaptionStored IsControl IsControlVisible IsEnabled IsParentColor IsParentFont IsParentOf IsProcessingPaintMsg IsRightToLeft IsVisible Left LMCaptureChanged LoadedAll LRDockWidth ManualDock ManualFloat MouseCapture MouseDown MouseEnter MouseInClient MouseLeave MouseMove MouseUp Notification OnConstrainedResize OnEditingDone OnQuadClick OnShowHint OnTripleClick Parent ParentDestroyingHandle ParentFontChanged ParentToClient Perform PositionDockRect QuadClick ReadBounds ReadState Refresh RemoveAllHandlersOfObject RemoveHandler RemoveHandlerOnBeforeDestruction RemoveHandlerOnChangeBounds RemoveHandlerOnEnabledChanged RemoveHandlerOnEnabledChanging RemoveHandlerOnKeyDown RemoveHandlerOnMouseWheel RemoveHandlerOnResize RemoveHandlerOnVisibleChanged RemoveHandlerOnVisibleChanging ReplaceDockedControl RequestAlign Resize Scale96ToFont Scale96ToForm Scale96ToScreen ScaleConstraints ScaleDesignToForm ScaleFontsPPI ScaleFontTo96 ScaleFontToScreen ScaleFormTo96 ScaleFormToDesign ScaleScreenTo96 ScaleScreenToFont ScreenToClient ScreenToControl SendToBack SessionProperties SetAction SetAlign SetAnchors SetAutoSize SetBiDiMode SetBoundsKeepBase SetCursor SetDragMode SetEnabled SetHint SetInitialBounds SetName SetParent SetParentBiDiMode SetParentComponent SetTextBuf SetVisible SetZOrder ShouldAutoAdjust Show ShowHelp TBDockHeight Text TextChanged Top TripleClick UndockHeight UndockWidth UpdateAnchorRules UpdateBaseBounds UpdateMouseCursor UpdateRolesForForm UseRightToLeftAlignment UseRightToLeftReading UseRightToLeftScrollBar VisibleChanged VisibleChanging Width WidthIsAnchored WindowProc WMCancelMode WMLButtonDBLCLK WMLButtonDown WMLButtonQuadCLK WMLButtonTripleCLK WMLButtonUp WMMButtonDBLCLK WMMButtonDown WMMButtonQuadCLK WMMButtonTripleCLK WMMButtonUp WMMouseHWheel WMMouseMove WMMouseWheel WMRButtonDBLCLK WMRButtonDown WMRButtonQuadCLK WMRButtonTripleCLK WMRButtonUp WMXButtonDBLCLK WMXButtonDown WMXButtonQuadCLK WMXButtonTripleCLK WMXButtonUp

From TLCLComponent (6)

DecLCLRefCount GetWSComponentClass IncLCLRefCount LCLRefCount NewInstance WidgetSetClass

From TComponent (64)

_AddRef _Release CanObserve ChangeName ComObject ComponentCount ComponentIndex Components ComponentState ComponentStyle DesignInfo DestroyComponents Destroying ExecuteAction FindComponent FreeNotification FreeOnRelease GetChildOwner GetChildParent GetDeltaStreams GetEnumerator GetIDsOfNames GetNamePath GetObservers GetOwner GetTypeInfo GetTypeInfoCount iicrGetComponent InsertComponent Invoke IsImplementorOf Loading Name ObserverAdded Observers OnGetDeltaStreams Owner PaletteCreated QueryInterface ReadDeltaState ReadDeltaStream ReferenceInterface RemoveComponent RemoveFreeNotification RemoveFreeNotifications SafeCallException SetAncestor SetChildOrder SetDesigning SetDesignInstance SetInline SetSubComponent Tag ToString TToStringNameMode UpdateAction Updated UpdateRegistry Updating ValidateContainer ValidateInsert ValidateRename VCLComObject WriteState

From TPersistent (4)

Assign FPOAttachObserver FPODetachObserver FPONotifyObservers

From TObject (35)

AfterConstruction CheckDisposed ClassInfo ClassName ClassNameIs ClassParent ClassType CleanupInstance DefaultHandlerStr Dispatch DispatchStr Disposed DisposeOf Equals FieldAddress Free FreeInstance GetDisposed GetHashCode GetInterface GetInterfaceByStr GetInterfaceEntry GetInterfaceEntryByStr GetInterfaceTable GetInterfaceWeak GetLastCastErrorInfo InheritsFrom InitInstance InstanceSize MethodAddress MethodName QualifiedClassName StringMessageTable SystemHasExtendedRTTI UnitName

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.