Description

Implementation building block to get the DisplayMetric as defined through a ZoomWindow.

The latter is used as mediator to receive the various view manipulation signals from widgets, window decoration, zoom slider, navigator and zoom gestures, thereby ensuring consistent behaviour and capturing a history of zoom states. A current display metric can be derived directly from ZoomWindow settings, and is used by Clip Widgets and similar ElementBox entities attached to the canvas, to provide a time calibrated display and to control the visible extension of elements with distinct duration.

usage: ZoomMetric should be mixed-into an implementation class and on top of some interface which derives from stage::model::DisplayMetric; a ZoomWindow instance is directly embedded and should be wired and controlled by the implementation class accordingly.

See also: ZoomWindow; DisplayMetric; stage::timeline::TimelineLayout usage example; ClipWidget::establishHorizontalExtension()

Definition in file zoom-metric.hpp.

#include "lib/time/timevalue.hpp"
#include "lib/meta/trait.hpp"
#include "stage/model/canvas-hook.hpp"
#include "stage/model/zoom-window.hpp"

Classes
class	ZoomMetric< I >
	Mix-In to implement the DisplayMetric interface on top of a ZoomWindow component, directly embedded here and thus also accessible downstream. More...

Namespaces
	stage
	Lumiera GTK UI implementation root.

	stage::model
	The Lumiera GTK-GUI uses a thin proxy layer data model on top of the actual "high-level-model", which lives in the Steam-Layer below.

Description

Classes

Namespaces