Restructure in DISL

["Robbie Schaefer" <robbie@c-lab.de>]

Hi all,

for our application (music player control in DISL) we needed
the restructure element for obtaining the playlist dynamically
and providing an interface for it. I attached the DISL code
and following is the fragment of the DTD, how we used restructure,
which is a bit different from standard UIML as we allowed adressing
templates by name and we did not implement cascade:

<!ELEMENT restructure EMPTY>
<!-- where-start,where-stop,template-start,template-stop
KEYWORDS: TOP,BOTTOM -->
<!ATTLIST restructure
 how (union | replace | delete) "union"
 where (before | here | after | child) "after"
 where-start NMTOKEN #IMPLIED
 where-stop NMTOKEN #IMPLIED
 where-template (before | here | after | child) "after"
 template-start NMTOKEN #IMPLIED
 template-stop NMTOKEN #IMPLIED
 template NMTOKEN #IMPLIED
>

BR,
Robbie.
--
   _/ Dipl. Inf. Robbie Schaefer _/ Phone: +49 5251 60-6107  _/
  _/ Visual Interactive Systems _/ Fax: +49 5251 60-6065    _/
 _/ C-LAB Fuerstenallee 11     _/                          _/
_/ D-33102 Paderborn          _/ URL: http://www.c-lab.de _/

----- Original Message ----- 
From: "James Helms" <jhelms@harmonia.com>
To: "OASIS UIML TC" <uiml@lists.oasis-open.org>; "Marc Abrams"
<mabrams@harmonia.com>; "Jean Vanderdonckt" <vanderdonckt@isys.ucl.ac.be>
Cc: <limbourg@acm.org>; <kris.luyten@uhasselt.be>
Sent: Monday, September 26, 2005 5:23 PM
Subject: [uiml] Examples of restructure.


Hello all,

Here are some simple examples of the <restructure> tag that we will be
discussing at the next meeting.

Thanks!

James Helms

Director of Research and Development
Harmonia, Inc.
P.O. Box 11282
Blacksburg, VA 24062

Office: (540) 951-5900 x 3
Cell: (540) 558-9722


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE uidl SYSTEM "disl.dtd">
<disl>
	<interface id="SongControl" state="start">
		<structure>
			<widget id="TitleScreen" generic-widget="variablefield"/>
			<widget id="ActSong" generic-widget="variablefield"/>
			<widget id="SetSong" generic-widget="variablebox"/>
			<widget id="Back" generic-widget="command"/>
			<widget id="Reload" generic-widget="command"/>
		</structure>
		<style>
			<part generic-widget="TitleScreen">
				<property id="type">string</property>
				<property id="value">Device Playlist</property>
				<property id="title">Title</property>
				<property id="description">Play List</property>
				<property id="help">Shows device playlist</property>
				<property id="visible">yes</property>
			</part>
			<part generic-widget="ActSong">
				<property id="type">string</property>
				<property id="value">Song 1</property>
				<property id="title">Now Playing</property>
				<property id="description">none</property>
				<property id="help">none</property>
				<property id="visible">yes</property>
			</part>
			<part generic-widget="SetSong">
				<property id="type">integer</property>
				<property id="value">1</property>
				<property id="title">Enter Song Number:</property>
				<property id="description">none</property>
				<property id="help">none</property>
				<property id="visible">yes</property>
				<property id="activated">yes</property>
				<property id="modified">no</property>
			</part>
			<part generic-widget="Reload">
				<property id="title">Reload List</property>
				<property id="description">Sync with device</property>
				<property id="help">Sync with device</property>
				<property id="selected">no</property>
				<property id="visible">yes</property>
				<property id="activated">yes</property>
			</part>
			<part generic-widget="Back">
				<property id="title">Back</property>
				<property id="description">Back to upper interface</property>
				<property id="help">none</property>
				<property id="selected">no</property>
				<property id="visible">yes</property>
				<property id="activated">yes</property>
			</part>
		</style>
		<behavior>
			<variable id="finalsong" constant="yes" type="string">Song </variable>
			<variable id="SongChanged" internal="no" type="boolean">false</variable>
			<variable id="actSong" internal="no" type="integer">1</variable>
			<!-- Rules based on commands -->
			<rule id="Reload">
				<condition>
					<equal>
						<property generic-widget="Reload" id="selected">yes</property>
					</equal>
				</condition>
			</rule>
			<rule id="Back">
				<condition>
					<equal>
						<property generic-widget="Back" id="selected">yes</property>
					</equal>
				</condition>
			</rule>
			<rule id="NewSongSet">
				<condition>
					<equal>
						<property generic-widget="SetSong" id="modified">yes</property>
					</equal>
				</condition>
			</rule>
			<!-- Rules based on internal variables-->
			<rule id="SongChanged">
				<condition>
					<equal>
						<variable id="SongChanged">true</variable>
					</equal>
				</condition>
			</rule>
			<!-- Interface transitions based on rule states -->
			<transition>
				<if-true rule-id="Back"/>
				<action>
					<interface id="START"/>
				</action>
			</transition>
			<transition>
				<if-true rule-id="NewSongSet"/>
				<action>
					<if>
						<condition>
							<equal negation="yes">
								<variable id="actSong"/>
								<property id="value" generic-widget="SetSong"/>
							</equal>
						</condition>
						<action>
							<statement>
								<variable id="actSong"/>
								<property id="value" generic-widget="SetSong"/>
							</statement>
							<statement>
								<variable id="SongChanged">true</variable>
							</statement>
						</action>
					</if>
				</action>
			</transition>
			<transition>
				<if-true rule-id="SongChanged"/>
				<action>
					<call id="changetitle" synchronized="no" source="http://uidlhost.dyndns.org/Audioplayer/servlet"; timeout="8s" maxsize="0">
						<parameter id="request">
							<value-of>setplaypos</value-of>
						</parameter>
						<parameter id="argument">
							<variable id="actSong"/>
						</parameter>
					</call>
					<statement>
						<variable id="SongChanged">false</variable>
					</statement>
					<statement>
						<property id="value" generic-widget="ActSong"/>
						<variable id="finalsong"/>
					</statement>
					<statement assignment="add">
						<property id="value" generic-widget="ActSong"/>
						<variable id="actSong"/>
					</statement>
				</action>
			</transition>
			<transition>
				<if-true rule-id="Reload"/>
				<action>
					<call id="ReloadList" source="http://uidlhost.dyndns.org/Audioplayer/servlet?request=getuidlplaylist"; template="PlayList"/>
					<restructure how="delete" where="after" where-start="Reload" where-stop="BOTTOM"/>
					<restructure how="union" where="after" where-start="Reload" template-start="ROOT" template-stop="BOTTOM" template="PlayList"/>
				</action>
			</transition>
			<event id="checkplaying" activated="yes" repeat="yes" timer="20s">
				<action>
					<call source="http://uidlhost.dyndns.org/Audioplayer/servlet"; id="getsong" synchronized="yes" timeout="5s" maxsize="2">
						<parameter id="request">
							<value-of>getplaypos</value-of>
						</parameter>
					</call>
					<if>
						<condition>
							<equal negation="yes">
								<variable id="actSong"/>
								<call id="getsong"/>
							</equal>
						</condition>
						<action>
							<statement>
								<variable id="actSong"/>
								<call id="getsong"/>
							</statement>
							<statement>
								<property id="value" generic-widget="ActSong"/>
								<variable id="finalsong"/>
							</statement>
							<statement assignment="add">
								<property id="value" generic-widget="ActSong"/>
								<variable id="actSong"/>
							</statement>
						</action>
					</if>
				</action>
			</event>
		</behavior>
	</interface>
	<template id="PlayList"/>
</disl>