TScrollingWinControl

type TScrollingWinControl = class(TCustomControl)

protected

  class procedure WSRegisterClass; override;

  procedure AlignControls(); override;

Aligns the controls which have the class instance as their Parent.

  function AutoScrollEnabled; virtual;

Indicates if automatic scrolling is enabled for the control.

  procedure CalculateAutoRanges; virtual;

Sets or resets the ranges used for scroll bars on the control.

  procedure CreateWnd; override;

Creates the window handle for the control.

  function GetClientScrollOffset; override;

The origin for the physical client area.

  function GetLogicalClientRect; override;

Returns the logical size of the client area on the control.

  procedure DoOnResize; override;

Performs actions needed when the control has been resized.

  procedure GetPreferredSizeClientFrame(); override;

Calculates the size of the client area for the control excluding visible scroll bars.

  procedure WMSize(); message;

Performs actions needed to handle WMSize messages.

  procedure WMHScroll(); message;

Delegates scroll messages to the handler for the horizontal scroll bar.

  procedure WMVScroll(); message;

Delegates scroll messages to the handler for the vertical scroll bar.

  procedure ComputeScrollbars; virtual;

Updates Page, AutoRange, IsScrollBarVisible, and returns True when changed.

  procedure SetAutoScroll(); virtual;

Sets the value for the AutoScroll property.

  procedure Loaded; override;

Performs actions when the component has been loaded from the LCL streaming mechanism.

  procedure Resizing(); virtual;

Performs actions needed when the control processes the WMSize message.

  property AutoScroll: Boolean; [rw]

Indicates whether scroll bars are automatically displayed or hidden when needed.

  procedure SetAutoSize(); override;

Sets the value for the AutoSize property.

public

  constructor Create(); override;

Constructor for the class instance.

  destructor Destroy; override;

Destructor for the class instance.

  function ScreenToClient(); override;

Converts the specified screen coordinates to client-relative coordinates.

  function ClientToScreen(); override;

Converts the specified client coordinates to absolute screen coordinates.

  procedure UpdateScrollbars;

Initializes or updates the scroll bars for the control.

  class function GetControlClassDefaultSize; override;

Returns the default size for this class of controls (when added to a form).

  procedure ScrollBy(); override;

Tells the widget to scroll the client area by the specified relative values.

  procedure ScrollInView();

Aligns the specified control to its parent and scrolls it into view.

published

  property HorzScrollBar: TControlScrollBar; [rw]

The horizontal scroll bar for the control.

  property VertScrollBar: TControlScrollBar; [rw]

The vertical scroll bar for the control.

end;

TScrollingWinControl

Implements a windowed control with scroll bars.

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

TObject

TControlScrollBar

Scroll bar type used in TScrollingWinControl.

TScrollBox

Implements a windowed control with scroll bars.

TCustomDesignControl

Provides a designer surface for scaling and layout of its child controls.

TCustomFrame

The base type for TFrame.

TCustomForm

The base type for TForm classes.

TFrame

Frames can be designed like Forms and used like custom controls, without much coding or installation in the IDE.

TForm

Implements a form used in an LCL application.