Description

Special CanvasHook decorator to apply a (dynamic) offset when attaching or moving Widgets on the shared canvas.

Note: the ctor uses getAnchorHook, thus effectively, for a chain of RelativeCanvasHook instances, the #refHook_ holds the top level anchor.

Remarks: avoiding this 2-step indirect dispatch is possibly, bug likely not of any significance, given the overhead of drawing.

Todo:: investigate real-live performance ////////////////////////////////////////////////////////////////TICKET #1254 : investigate impact of indirection

Definition at line 147 of file track-presenter.hpp.

Public Member Functions
	RelativeCanvasHook (model::CanvasHook< WID > &baseHook)

Public Member Functions inherited from CanvasHook< WID >
virtual	~CanvasHook ()
	this is an interface

Pos	hookedAt (int x, int y)

Pos	hookedAt (Time start, int downshift=0)
	build the "construction hook" for a CanvasHooked element, which is to be attached to some timeline canvas view. More...

Protected Member Functions
model::DisplayMetric &	getMetric () const override
	delegating layout metric to the root canvas

virtual int	hookAdjX (int xPos)=0

virtual int	hookAdjY (int yPos)=0

Private Member Functions
model::CanvasHook< WID > &	getAnchorHook () noexcept override
	allow to build a derived relative hook with different offset

void	hook (WID &widget, int xPos=0, int yPos=0) override

void	move (WID &widget, int xPos, int yPos) override

void	remove (WID &widget) override

Inheritance diagram for RelativeCanvasHook< WID >:

Collaboration diagram for RelativeCanvasHook< WID >:

The documentation for this class was generated from the following file:

Public Member Functions