CanvasHook< WID > Class Template Reference

#include "stage/model/canvas-hook.hpp"

Description

template<class WID>
class stage::model::CanvasHook< WID >

Interface to represent _"some presentation layout entity",_ with the ability to place widgets (managed elsewhere) onto it, as well as to relocate those widgets to another position.

Remarks

the canonical example is a canvas widget, (e.g. Gtk::Layout), allowing to attach child widgets at specific positions, together with custom drawing.

Warning

please ensure the CanvasHook outlives any attached CanvasHooked.

See also

ViewHook embodies the same scheme for widgets just "added" into the presentation without the notion of explicit coordinates.

Definition at line 118 of file canvas-hook.hpp.

Public Member Functions
virtual	~CanvasHook ()
	this is an interface
virtual CanvasHook< WID > &	getAnchorHook () noexcept
	Anchor point to build chains of related View Hooks.
virtual DisplayMetric &	getMetric () const =0
	access the component to handle layout metric
virtual void	hook (WID &widget, int xPos, int yPos)=0
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...
virtual void	move (WID &widget, int xPos, int yPos)=0
virtual void	remove (WID &widget)=0

Classes
struct	Pos

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Class Documentation

stage::model::CanvasHook::Pos

struct stage::model::CanvasHook::Pos

Class Members
CanvasHook *	view
int	x
int	y

Collaboration diagram for CanvasHook< WID >::Pos:

Member Function Documentation

hookedAt()

Pos hookedAt ( Time  start, int  downshift = 0  )

inline

build the "construction hook" for a CanvasHooked element, which is to be attached to some timeline canvas view.

Parameters

start	anchor point / nominal start point of the element
downshift	(optional) vertical shift down from the baseline

Returns

opaque registration argument for the CanvasHooked ctor

Definition at line 155 of file canvas-hook.hpp.

Inheritance diagram for CanvasHook< WID >:

Collaboration diagram for CanvasHook< WID >:

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

• canvas-hook.hpp