74 lines
4.9 KiB
HTML
74 lines
4.9 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta name="copyright" content="(C) Copyright IBM Corporation 2005" />
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<meta name="DC.Title" content="iSeries Navigator structure and flow of control for C++ plug-ins" />
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<meta name="abstract" content="The internal architecture of the iSeries Navigator product is intended to serve as an integration point for an extensible, broad-based operations interface for the iSeries server." />
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<meta name="description" content="The internal architecture of the iSeries Navigator product is intended to serve as an integration point for an extensible, broad-based operations interface for the iSeries server." />
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>iSeries Navigator
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structure and flow of control for C++ plug-ins</title>
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</head>
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<body id="rzakxcpluspluscntrolflow"><a name="rzakxcpluspluscntrolflow"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">iSeries Navigator
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structure and flow of control for C++ plug-ins</h1>
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<div><p>The internal architecture of the iSeries™ Navigator product is intended
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to serve as an integration point for an extensible, broad-based operations
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interface for the iSeries server.</p>
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<p>Each functional component of the interface is packaged as an ActiveX server
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DLL. iSeries Navigator
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uses Microsoft's Component Object Model (COM) technology to activate only
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the component implementations that currently are needed to service a user
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request. This avoids the problem of having to load the entire product at start
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up, thereby consuming the majority of Windows<sup>®</sup> resources, and impacting performance
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of the entire system. Multiple servers may register their request to add menu
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items and dialogs to a given object type in the Navigator hierarchy.</p>
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<p>Plug-ins work by responding to method calls from iSeries Navigator that are generated
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in response to user actions. For example, when a user right-clicks on an object
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in the Navigator hierarchy, the Navigator constructs a context menu for the
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object, and displays the menu on the screen. The Navigator obtains the menu
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items by calling each plug-in that has registered its intention to supply
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context menu items for the selected object type.</p>
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<p>The functions that are implemented by a plug-in logically are grouped into
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"interfaces." An interface is a set of logically related methods on a class
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that iSeries Navigator
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can call to perform a specific function. The Component Object Model supports
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the definition of interfaces in C++ through the declaration of an abstract
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class that defines a set of pure virtual functions. Classes that call the
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interface are known as implementation classes. Implementation classes subclass
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the abstract class definition and provide C++ code for each of the functions
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defined on the interface.</p>
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<p>A given implementation class may implement as many interfaces as the developer
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chooses. When creating a new project workspace for an ActiveX server DLL in
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the Developer Studio, the AppWizard generates macros that facilitate interface
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implementation. Each interface is declared as a nested class on a containing
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implementation class. The nested class has no member data and does not use
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any functions other than those that are defined on its interface. Its methods
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typically call functions on the implementation class to get and set state
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data, and to perform the actual work that is defined by the interface specification.</p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzakxplugincplus.htm" title="Use the following topics to learn about the flow of control in iSeries Navigator for C++.">C++ Reference</a></div>
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</div>
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</div>
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</body>
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</html>
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