Description

drawing routines to paint the nested system of insets and rulers in the track content display

Remarks: the actual sequence of elements to draw is established by TrackBody::establishTrackSpace (TrackProfile&) "evaluating" the nested widget structure; this results in a sequence of drawing "verbs", which we call the TrackProfile. This class here implements a ProfileInterpreter, which is a double-dispatch mechanism to invoke a set of (virtual) drawing primitives, the actual drawing code is in the two following subclasses, separate for the background and for drawing overlays.

Note: the invariant is: after processing a verb from the profile, all drawing including the current "water level" line_ is complete.

Definition at line 162 of file body-canvas-widget.cpp.

Public Member Functions
	AbstractTrackRenderer (CairoC currentDrawContext, DisplayManager &layout)

Public Member Functions inherited from ProfileInterpreter
virtual	~ProfileInterpreter ()
	this is an interface

virtual void	close (uint n)=0
	indicate the end of `n` nested structures, typically by ascending back `n` levels

virtual void	coda (uint pad)=0
	closing part of the timeline below track display, with `pad` additional padding

virtual void	content (uint h)=0
	represent a content area with the given vertical extension

virtual void	gap (uint h)=0
	represent a gap to structure the display

virtual void	open ()=0
	indicate entering a nested structure, typically as 3D inset

virtual void	prelude ()=0
	start the track presentation at top of the timeline

virtual void	ruler (uint h)=0
	represent an overview/ruler track with the given height

Protected Member Functions
void	fillBackground (StyleC style, int height)

Protected Attributes
CairoC	cox_

int	line_ = 0
	the current painting "water level". More...

StyleC	style_

StyleC	styleR_

PixSpan	visible_

Additional Inherited Members
Static Public Attributes inherited from ProfileInterpreter
static const size_t	MAX_ARG_SIZE = sizeof(size_t)

Member Data Documentation

int line_ = 0

protected

the current painting "water level".

To be updated while drawing top-down

Definition at line 173 of file body-canvas-widget.cpp.

Inheritance diagram for AbstractTrackRenderer:

Collaboration diagram for AbstractTrackRenderer:

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