TimelineZoomScale Class Reference

Description

Definition at line 42 of file timeline-zoom-scale.hpp.

Public Member Functions
	TimelineZoomScale ()
void	set_value (double val)
sigc::signal< void, double >	signal_zoom ()
void	wireTimelineState (shared_ptr< TimelineState > currentState)

Private Member Functions
TimelineViewWindow &	getViewWindow ()
	access current timeline state
void	on_timeline_state_changed (shared_ptr< TimelineState > newState)
	Update the slider position when the timeline state is changed.
void	on_zoom ()
	Event handler for when the adjustment value is changed.
void	on_zoom_in_clicked ()
	Event handler for when the zoomIn Button is clicked.
void	on_zoom_out_clicked ()
	Event handler for when the zoomIn Button is clicked.

Private Attributes
Glib::RefPtr< Gtk::Adjustment >	adjustment
const double	button_step_size
Gtk::HScale	slider
shared_ptr< TimelineState >	timelineState
MiniButton	zoomIn
MiniButton	zoomOut
sigc::signal< void, double >	zoomSignal

Constructor & Destructor Documentation

TimelineZoomScale()

TimelineZoomScale

(

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Todo:

The initial adjustment value needs to match what the TimelineViewWindow's actual timeScale Value is.

TimelineViewWindow::get_time_scale() is currently a public method, but will soon be private. Maybe TimelineViewWindow can have a zoom_adjustment that gets passed to this widget's Constructor?

Todo:

actually there is a more involved problem. The TimelineWidget maintains a TimelineState, which in turn owns the TimelineViewWindow. Now, the problem is: when we switch to another Sequence (View), then this TimelineState gets switched too, causing also a entirely different TimelineViewWindow to become effective. Thus

• how can we managed to be notified from that switch?
• problem is: TimelineZoomScale widget is owned by the TimelinePannel. Likewise, TimelineWidget is owned by the TimelinePannel. But the state handling/switching logic is embedded within TimelineWidget
• and finally: how can we translate the actual scale (in time units), as maintained within TimelineViewWindow, back into the adjustment used here (which uses a relative scale 0...1.0 ) S

Definition at line 60 of file timeline-zoom-scale.cpp.

References TimelineZoomScale::on_timeline_state_changed(), TimelineZoomScale::on_zoom(), TimelineZoomScale::on_zoom_in_clicked(), and TimelineZoomScale::on_zoom_out_clicked().

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Inheritance diagram for TimelineZoomScale:

Collaboration diagram for TimelineZoomScale:

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

• timeline-zoom-scale.hpp
• timeline-zoom-scale.cpp