156 lines
5.2 KiB
Plaintext
156 lines
5.2 KiB
Plaintext
<!-- $XConsortium: Display.sgm /main/7 1996/09/08 20:13:45 rws $ -->
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<!-- (c) Copyright 1995 Digital Equipment Corporation. -->
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<!-- (c) Copyright 1995 Hewlett-Packard Company. -->
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<!-- (c) Copyright 1995 International Business Machines Corp. -->
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<!-- (c) Copyright 1995 Sun Microsystems, Inc. -->
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<!-- (c) Copyright 1995 Novell, Inc. -->
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<!-- (c) Copyright 1995 FUJITSU LIMITED. -->
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<!-- (c) Copyright 1995 Hitachi. -->
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<![ %CDE.C.CDE; [<RefEntry Id="CDEMX.XCDI.MAN283.rsml.1">]]>
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<![ %CDE.C.XO; [<RefEntry Id="XCDI.MAN283.rsml.1">]]>
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<RefMeta>
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<RefEntryTitle>Display</RefEntryTitle>
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<ManVolNum>special file</ManVolNum>
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</RefMeta>
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<RefNameDiv>
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<RefName><Symbol Role="Message">Display</Symbol></RefName>
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<RefPurpose>display a document
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</RefPurpose>
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</RefNameDiv>
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<!-- $XConsortium: Display.sgm /main/7 1996/09/08 20:13:45 rws $-->
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<!-- CDE Common Source Format, Version 1.0.0-->
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<!-- (c) Copyright 1993, 1994, 1995 Hewlett-Packard Company-->
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<!-- (c) Copyright 1993, 1994, 1995 International Business Machines Corp.-->
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<!-- (c) Copyright 1993, 1994, 1995 Sun Microsystems, Inc.-->
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<!-- (c) Copyright 1993, 1994, 1995 Novell, Inc.-->
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<RefSynopsisDiv>
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<Synopsis>[<Symbol Role="Variable">file</Symbol>] Display(in <Emphasis>mediaType contents</Emphasis>
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[in title <Emphasis>docName</Emphasis>]);
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</Synopsis>
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</RefSynopsisDiv>
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<RefSect1>
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<Title>DESCRIPTION</Title>
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<Para>The
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<Symbol Role="Message">Display</Symbol> request causes the handler to display (present or manifest)
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a document to the user.
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For example, an audio manipulation utility would be said to
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``display'' audio documents when it plays them.
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</Para>
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<Para>The handler must decide issues such as:
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</Para>
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<ItemizedList>
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<ListItem>
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<Para>When the display operation can be deemed completed
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</Para>
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</ListItem>
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<ListItem>
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<Para>What user gesture signals the completion of the display
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</Para>
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</ListItem>
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<ListItem>
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<Para>What the handling tool should do with itself after replying
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</Para>
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</ListItem>
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</ItemizedList>
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<Para>The
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<Emphasis>contents</Emphasis> argument
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is the contents of the document.
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If this argument is unset
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(in other words, has a value of
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<Literal>(char *)0</Literal>), then the contents of the document are in
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the file named in the message's
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<Symbol Role="Variable">file</Symbol> attribute.
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The data type
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(<Emphasis>mediaType</Emphasis>) of the
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<Emphasis>contents</Emphasis> argument should be
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<Literal>string</Literal>, unless nulls are valid in the given media type,
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in which case the data type must be
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<Literal>bytes</Literal>.</Para>
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<Para>The
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<Emphasis>docName</Emphasis> argument contains the name of the document.
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If the
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<Emphasis>docName</Emphasis> argument is absent and the
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<Symbol Role="Variable">file</Symbol> attribute is set,
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the file name is considered to be the title of the document.
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This string would be suitable for display in a window title bar, for example.
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</Para>
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</RefSect1>
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<RefSect1>
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<Title>APPLICATION USAGE</Title>
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<Para>The
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&cdeman.ttmedia.ptype.declare; function can be used to register for,
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and help process, this message.
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</Para>
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<Para>This message can be sent with the
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&cdeman.ttmedia.load; function.
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</Para>
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<Para>When the document to be displayed
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is read-only or unlikely to be modified
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the
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<Symbol Role="Message">Display</Symbol> message is frequently used instead of the
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<Symbol Role="Message">Edit</Symbol> message.
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</Para>
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</RefSect1>
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<RefSect1>
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<Title>EXAMPLES</Title>
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<Para>To display a PostScript document, the application can send a
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<Symbol Role="Message">Display</Symbol> request with a first argument whose vtype is
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<Literal>PostScript</Literal>, and whose value is a vector of bytes such as:
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</Para>
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<InformalExample Remap="indent">
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<ProgramListing>%!\n/inch {72 mul} def...
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</ProgramListing>
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</InformalExample>
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<Para>The
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<Literal>\n</Literal> in the example represents the newline character.
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The notation is the same as in the &str-Z3;.
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</Para>
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<Para>To display a PostScript document contained in a file,
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the application can send a
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<Symbol Role="Message">Display</Symbol> request with the
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<Symbol Role="Variable">file</Symbol> attribute set to that file
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and with an unset first argument whose vtype is
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<Literal>PostScript</Literal>.</Para>
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</RefSect1>
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<RefSect1>
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<Title>ERRORS</Title>
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<Para>The ToolTalk service may return one of the following errors
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in processing the
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<Symbol Role="Message">Display</Symbol> request:
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</Para>
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<VariableList>
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<VarListEntry>
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<Term>TT_DESKTOP_ENOENT</Term>
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<ListItem>
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<Para>The file that was alleged to contain the document does not exist.
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</Para>
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</ListItem>
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</VarListEntry>
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<VarListEntry>
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<Term>TT_DESKTOP_ENODATA</Term>
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<ListItem>
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<Para>The in-mode
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<Emphasis>contents</Emphasis> argument had no value and the
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<Symbol Role="Variable">file</Symbol> attribute
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of the message was not set.
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</Para>
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</ListItem>
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</VarListEntry>
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<VarListEntry>
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<Term>TT_MEDIA_ERR_FORMAT</Term>
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<ListItem>
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<Para>The document is not a valid instance of the media type.
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</Para>
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</ListItem>
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</VarListEntry>
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</VariableList>
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</RefSect1>
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<RefSect1>
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<Title>SEE ALSO</Title>
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<Para>&cdeman.ttmedia.ptype.declare;, &cdeman.ttmedia.load;; <Emphasis>Intro</Emphasis>, <Symbol Role="Message">Deposit</Symbol>, <Symbol Role="Message">Edit</Symbol>, <Symbol Role="Message">Status</Symbol> requests.
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</Para>
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</RefSect1>
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</RefEntry>
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<!--fickle 1.12 mancsf-to-docbook 1.2 08/07/95 23:18:47-->
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