WatchList | SuperCollider 3.13.0 Help

Description

A WatchList tracks dynamic collections of items and keeps them in a list in historical order. Examples of such collections include:

* keys in an Environment, e.g. a ProxySpace;

* parameter names (controlKeys) of processes like Ndef, Tdef, Pdef

The main argument for historical order is that this is more location-stable that e.g. alphabetic order. When adding processes and parameters by live coding, the locations of parameters on physical controllers remain the same (as long as there is space for more), creating less distraction than changing orders based on alphabet (or order of \control.kr calls when rewriting an Ndef).

NOTE: ToDo : selection of subsets by offset and size

First code examples:// a dict to watch a = (); b = WatchList.envir(a); g = ParamGui(a, 8); g.orderedNames = b.list; h = ParamGui(a, 8).moveTo(100, 800); a.put(\x, 1); b.list; a.put(\y, 1); b.list; a.put(\a, 123); // changes order b.list; // WatchList keeps old items in list a.put(\x, nil); b.list; // ParamGui does not show empty keys yet, but should a.put(\x, [1, 2, 3]); // old order comes back a.put(\bc, [3, 2, 1]);

Class Methods

basic creation

.new

basic creation of a new WatchList.

Arguments:

object	the object to watch
getFunc	the function fr getting a list of items from object
keepGone	not used yet: flag whether to keep or remove old names.
skip	flag whether to add a skipjack for watching
halo	flag whether to add watchlist to object halo

convenience creation

create watchlists for some typical objects with proper getFuncs. arguments are the same as above minus getFunc: object, keepGone, skip, halo

.envir

for environments, gets keys

.proxy

for nodeproxies, Ndef, Tdef, Pdef

.spaceAr

for proxyspaces, gets ar proxies

.spaceKr

for proxyspaces, gets ar proxies

Instance Methods

.list

the list of items in order

.object

get and set the object to watch

.getFunc

the func by which to ask the object for its items

.keepGone

(unused) flag whether to keep old names in list or not.

.update

update the list

.skip

skipjack to update list automagically

.clear

clear the list

Examples

// example for using WatchLists for a proxyspace and its proxies

p = ProxySpace.push(s);

d = WatchList.spaceAr(p);
e = WatchList.spaceKr(p);
f = WatchList.proxy();

// add these one by one
~a.ar;
~z.ar;
~b.ar;
d.list;

~k.kr;
~j.kr;
~i.kr;

// alphabetic
p.arProxyNames
p.krProxyNames

// historic
d.list
e.list

f.object = ~a;
~a = { SinOscFB.ar(\freq.kr(300) + [0, \detune.kr]) * \amp.kr(0.2, 0.1) };
f.list;

// this has alphabetic order - could be adapted for WatchLists
ProxyMixer(p);

// use WatchLists for controller - works without gui too.
// needs modality quark
//

m = MKtl(\nk2, "*trol2"); m.gui;

m.elementsDict.do(_.action_(MFunc()));

(
// sliders set volume
m.elAt(\sl).do { |el, i|
    el.action.add(\arVol, { |el|
        var arkey = d.list[i];
        if (arkey.notNil) {
            p[arkey].softVol_(el.value.squared, lastVal: el.prevValue.squared)
        }
    })
};
// S button stops
m.elAt(\bt, \S).do { |el, i|
    el.action.add(\arPlay, { |el|
        var proxy, arkey = d.list[i];
        if (arkey.notNil) {
            p[arkey].stop;
            "% stops.\n".postf(arkey.cs);
        };
    });
};
// M button plays
m.elAt(\bt, \M).do { |el, i|
    el.action.add(\arPlay, { |el|
        var arkey = d.list[i];
        if (arkey.notNil) {
            p[arkey].play;
            "% plays.\n".postf(arkey.cs);
        };
    });
};

// R button chooses proxy for edit
m.elAt(\bt, \R).do { |el, i|
    el.action.add(\arEdit, { |el|
        var arkey = d.list[i];
        if (arkey.notNil) {
            f.object_(p[arkey]);
            "% knobs edit %\n.".postf(m, arkey.cs);
        };
    });
};

// knobs edit parameters of selected proxy
m.elAt(\kn).do { |el, i|
    el.action.add(\setParam, { |el|
        var ctlkey = f.list[i];
        if (ctlkey.notNil) {
            f.object.softSet(ctlkey, el.value,
                mapped: false, lastVal: el.prevValue);
        };
    });
};
)

// now add processes:
// they will be added to the bottom of the list
// add parameters on "front" proxies - params are added to the end
// note: this order is lost when switching front proxy
// would require making a separate watchlist for each proxy

helpfile source: HelpSource/Classes/WatchList.schelp
link::adclib/Classes/WatchList::

WatchListExtension