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<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE erlref SYSTEM "erlref.dtd">
<erlref>
<header>
<copyright>
<year>2002</year><year>2016</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
</legalnotice>
<title>et_viewer</title>
<prepared>Håkan Mattsson</prepared>
<responsible>Håkan Mattsson</responsible>
<docno></docno>
<approved>Håkan Mattsson</approved>
<checked></checked>
<date></date>
<rev>%VSN%</rev>
<file>et_viewer.xml</file>
</header>
<module>et_viewer</module>
<modulesummary>Displays a sequence chart for trace events (messages/actions)</modulesummary>
<description>
<p></p>
</description>
<funcs>
<func>
<name>file(FileName) -> {ok, ViewerPid} | {error, Reason}</name>
<fsummary>Start a new event viewer and a corresponding collector and load them with trace events from a trace file.</fsummary>
<type>
<v>FileName() = string()</v>
<v>ViewerPid = pid()</v>
<v>Reason = term()</v>
</type>
<desc>
<p>Start a new event viewer and a corresponding collector
and load them with trace events from a trace file.</p>
</desc>
</func>
<func>
<name>start() -> ok</name>
<fsummary>Simplified start of a sequence chart viewer with global tracing activated.</fsummary>
<desc>
<p>Simplified start of a sequence chart viewer with
global tracing activated.</p>
<p>Convenient to be used from the command line
(erl -s et_viewer).</p>
</desc>
</func>
<func>
<name>start(Options) -> ok</name>
<fsummary>Start of a sequence chart viewer without linking to the parent process.</fsummary>
<desc>
<p>Start of a sequence chart viewer without linking
to the parent process.</p>
</desc>
</func>
<func>
<name>start_link(Options) -> {ok, ViewerPid} | {error, Reason}</name>
<fsummary>Start a sequence chart viewer for trace events (messages/actions)</fsummary>
<type>
<v>Options = [option() | collector_option()]</v>
<v>option() = {parent_pid, extended_pid()} | {title, term()} | {detail_level, detail_level()} | {is_suspended, boolean()} | {scale, integer()} | {width, integer()} | {height, integer()} | {collector_pid, extended_pid()} | {event_order, event_order()} | {active_filter, atom()} | {max_actors, extended_integer()} | {trace_pattern, et_collector_trace_pattern()} | {trace_port, et_collector_trace_port()} | {trace_global, et_collector_trace_global()} | {trace_client, et_collector_trace_client()} | {dict_insert, {filter, filter_name()}, event_filter_fun()} | {dict_insert, et_collector_dict_key(), et_collector_dict_val()} | {dict_delete, {filter, filter_name()}} | {dict_delete, et_collector_dict_key()} | {actors, actors()} | {first_event, first_key()} | {hide_unknown, boolean()} | {hide_actions, boolean()} | {display_mode, display_mode()}</v>
<v>extended_pid() = pid() | undefined</v>
<v>detail_level() = min | max | integer(X) when X >=0, X =< 100</v>
<v>event_order() = trace_ts | event_ts</v>
<v>extended_integer() = integer() | infinity</v>
<v>display_mode() = all | {search_actors, direction(), first_key(), actors()}</v>
<v>direction() = forward | reverse</v>
<v>first_key() = event_key()</v>
<v>actors() = [term()]</v>
<v></v>
<v>filter_name() = atom()</v>
<v>filter_fun() = fun(Event) -> false | true | {true, NewEvent}</v>
<v>Event = NewEvent = record(event)</v>
<v>ViewerPid = pid()</v>
<v>Reason = term()</v>
</type>
<desc>
<p>Start a sequence chart viewer for trace events
(messages/actions)</p>
<p>A filter_fun() takes an event record as sole argument
and returns false | true | {true, NewEvent}.</p>
<p>If the <c>collector_pid</c> is <c>undefined</c> a new
<c>et_collector</c> will be started with the following
parameter settings: <c>parent_pid</c>, <c>event_order</c>,
<c>trace_global</c>, <c>trace_pattern</c>, <c>trace_port</c>, <c>trace_max_queue</c>,
<c>trace_client</c>, <c>dict_insert</c> and <c>dict_delete</c>.
The new <c>et_viewer</c> will register itself as an <c>et_collector</c>
subscriber.
</p>
<p>Default values:</p>
<list type="bulleted">
<item>parent_pid - self().</item>
<item>title - "et_viewer".</item>
<item>detail_level - max.</item>
<item>is_suspended - false.</item>
<item>scale - 2.</item>
<item>width - 800.</item>
<item>height - 600.</item>
<item>collector_pid - undefined.</item>
<item>event_order - trace_ts.</item>
<item>active_filter - collector.</item>
<item>max_actors - 5.</item>
<item>actors - ["UNKNOWN"].</item>
<item>first_event - first.</item>
<item>hide_unknown - false.</item>
<item>hide_actions - false.</item>
<item>display_mode - all.</item>
</list>
</desc>
</func>
<func>
<name>get_collector_pid(ViewerPid) -> CollectorPid</name>
<fsummary>Returns the identifier of the collector process</fsummary>
<type>
<v>ViewerPid = pid()</v>
<v>CollectorPid = pid()</v>
</type>
<desc>
<p>Returns the identifier of the collector process.</p>
</desc>
</func>
<func>
<name>stop(ViewerPid) -> ok</name>
<fsummary>Stops a viewer</fsummary>
<type>
<v>ViewerPid = pid()</v>
</type>
<desc>
<p>Stops a viewer process.</p>
</desc>
</func>
</funcs>
</erlref>
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