TTMSFNCBloxNavigatorController Class

Encapsulates the rendering and interaction logic that backs a navigator: it scales the diagram into the overview, draws blocks and lines, tracks the visible-area highlight, and translates pointer drags into scroll and zoom operations on the linked control.

API unit family: TMSFNCBloxNavigator Inherits from: TObject

Syntax

TTMSFNCBloxNavigatorController = class(TObject)

Remarks

An instance is created and owned by each TTMSFNCBloxNavigator; the navigator exposes the relevant settings as published properties and forwards pointer events to the controller.

Properties

Name	Description
BackgroundColor	The color used to fill the area behind the scaled-down diagram in the overview.
BlockShape	Selects whether blocks are drawn with their original shape or as plain rectangles in the overview.
BloxControl	The diagram control the navigator previews and controls.
Color	The color used to fill the navigator surface around the scaled-down diagram region.
EnableZoom	Allows zooming by dragging the highlight border.
HighlightColor	The color of the rectangle that highlights the currently visible region of the diagram.
HighlightRect	The rectangle, in navigator coordinates, that marks the currently visible region of the diagram.
HighlightWidth	The pen width, in pixels, used to draw the visible-area highlight rectangle.
Offset	The horizontal and vertical scale factors that map diagram coordinates onto the overview.
PaintArea	The rectangle within the navigator into which the scaled-down diagram is fitted.
PaintLines	Determines whether connecting lines between blocks are drawn in the overview.
State	The current interaction state, indicating whether a move or zoom drag is in progress.

Methods

Name	Description
EndMoving	Ends an in-progress move (scroll) interaction and returns the controller to its idle state.
EndZoom	Ends an in-progress zoom interaction and returns the controller to its idle state.
MoveTo	Scrolls the linked control so that its visible region follows the given overview point while a move is active.
PaintTo	Renders the scaled-down diagram, its connecting lines, and the visible-area highlight onto the given surface.
PointInHighlightRect	Determines whether a point lies inside, on the border of, or outside the visible-area highlight rectangle.
StartMoving	Begins a move (scroll) interaction anchored at the given overview point.
StartZoom	Begins a zoom interaction anchored at the corner of the highlight opposite the given point.
ZoomTo	Updates the linked control's zoom level from the rectangle dragged out since the zoom interaction started.