TViewport

Moves Control by Offset and limits its visible rectangle.

Inheritance

Level	Ancestor	Description
1	TObject	Ultimate ancestor in a class hierarchy
2	TBaseObject	A base class for objects that can be used instead of `TObject`.
3	TControl	Visual user interface element that can react to user input.
4	TPanel	Base class for a `TControl` that contains other controls.
5	TControlEmbellishment	Base class for controls that embellish an other `Control`.
6	TViewport

Source

UserInterface.Control.ViewPort.pas (43)

Description

TViewport handles mouse and keyboard events to allow the user to move the viewport over its allowable range.

Fields

Scope	Visibility	Type	Name
Instance	protected	TInteger32Point	FOffset
Instance	protected	TMouseScrollAction	MouseScrollAction
Instance	protected	TInteger32Point	MouseScrollStart
Instance	protected	TAutomaticScroller	AutomaticScroller

Methods

Scope	Visibility	Result	Name
Instance	protected		ChildRethinksScrollBars(Child: TControl)
Instance	protected		ControlChanged()
Instance	protected		SizeChanged()
Instance	protected		StartMouseScrolling(Position: TInteger32Point)
Instance	protected		MouseScroll(Position: TInteger32Point)
Instance	protected		EndMouseScrolling(Position: TInteger32Point)
Instance	protected	TBoolean	GoLeft(KeyModifiers: TKeyModifiers)
Instance	protected	TBoolean	GoRight(KeyModifiers: TKeyModifiers)
Instance	protected	TBoolean	GoUp(KeyModifiers: TKeyModifiers)
Instance	protected	TBoolean	GoDown(KeyModifiers: TKeyModifiers)
Instance	protected	TBoolean	GoPageLeft(KeyModifiers: TKeyModifiers)
Instance	protected	TBoolean	GoPageRight(KeyModifiers: TKeyModifiers)
Instance	protected	TBoolean	GoPageUp(KeyModifiers: TKeyModifiers)
Instance	protected	TBoolean	GoPageDown(KeyModifiers: TKeyModifiers)
Instance	protected	TBoolean	GoVerticalHome(KeyModifiers: TKeyModifiers)
Instance	protected	TBoolean	GoVerticalEnd(KeyModifiers: TKeyModifiers)
Instance	protected	TBoolean	GoHorizontalHome(KeyModifiers: TKeyModifiers)
Instance	protected	TBoolean	GoHorizontalEnd(KeyModifiers: TKeyModifiers)
Instance	public		Create()
Instance	public		Destroy()
Instance	public		PaintChildren(Canvas: TCanvas)
Instance	public	TBoolean	MouseWheel(Event: TMouseWheelEvent)
Instance	public	TBoolean	MouseRightDown(Event: TMouseButtonEvent)
Instance	public	TBoolean	MouseRightUp(Event: TMouseButtonEvent)
Instance	public	TBoolean	MouseMove(Event: TMouseMoveEvent)
Instance	public	TInteger32Point	ConvertPositionToChildPosition(Position: TInteger32Point; Child: TControl)
Instance	public	TInteger32Point	ConvertPositionFromChildPosition(Position: TInteger32Point; Child: TControl)
Instance	public	TInteger32Rectangle	GetVisibleRectangleForControl(Control: TControl)
Instance	public		MakeRectangleVisibleForControl(Control: TControl; Rectangle: TInteger32Rectangle)
Instance	public		SetOffset(Offset: TInteger32Point)
Instance	public		ValidateOffset()
Instance	public	TInteger32Point	MaximumOffset()
Instance	public	TBoolean	Move(Dimension: T2dDimension; Offset: TInteger32)
Instance	public	TBoolean	MoveUnit(Dimension: T2dDimension; Sign: TSign)
Instance	public	TBoolean	MovePage(Dimension: T2dDimension; Sign: TSign)
Instance	public		MoveRectangleVisible(Rectangle: TInteger32Rectangle)