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| 6 | <title>The QAxContainer Module</title>
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| 24 | <font color="#004faf">Main Classes</font></a>
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| 31 | </td>
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| 32 | <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>The QAxContainer Module</h1>
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| 33 |
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| 34 |
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| 35 | <p>
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| 36 | <p> <!-- toc -->
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| 37 | <ul>
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| 38 | <li><a href="#1"> Introduction
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| 39 | </a>
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| 40 | <li><a href="#2"> Building the library
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| 41 | </a>
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| 42 | <li><a href="#3"> Using the library
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| 43 | </a>
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| 44 | <ul>
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| 45 | <li><a href="#3-1"> Distributing QAxContainer applications
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| 46 | </a>
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| 47 | </ul>
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| 48 | <li><a href="#4"> Instantiating COM objects
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| 49 | </a>
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| 50 | <li><a href="#5"> Accessing the object API
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| 51 | </a>
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| 52 | <ul>
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| 53 | <li><a href="#5-1"> Typical error messages
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| 54 | </a>
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| 55 | <ul>
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| 56 | <li><a href="#5-1-1"> Requested control could not be instantiated
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| 57 | </a>
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| 58 | <li><a href="#5-1-2"> QAxBase::internalInvoke: No such method
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| 59 | </a>
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| 60 | <li><a href="#5-1-3"> Error calling IDispatch member: Non-optional parameter
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| 61 | missing
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| 62 | </a>
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| 63 | <li><a href="#5-1-4"> Error calling IDispatch member: Type mismatch in
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| 64 | parameter n
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| 65 | </a>
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| 66 | <li><a href="#5-1-5"> QAxScriptManager::call(): No script provides this function
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| 67 | </a>
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| 68 | </ul>
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| 69 | </ul>
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| 70 | </ul>
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| 71 | <!-- endtoc -->
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| 72 |
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| 73 | <p> <h2> Introduction
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| 74 | </h2>
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| 75 | <a name="1"></a><p> The QAxContainer module provides a library implementing a <a href="qwidget.html">QWidget</a>
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| 76 | subclass, <a href="qaxwidget.html">QAxWidget</a>, that acts as a container for ActiveX
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| 77 | controls, and a <a href="qobject.html">QObject</a> subclass, <a href="qaxobject.html">QAxObject</a>, that can be used to
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| 78 | easily access non-visual COM objects. Scripting COM objects embedded
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| 79 | using these classes is possible through the <a href="qaxscript.html">QAxScript</a>, <a href="qaxscriptmanager.html">QAxScriptManager</a>
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| 80 | and <a href="qaxscriptengine.html">QAxScriptEngine</a> classes.
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| 81 | <p> This module is part of the <a href="activeqt.html">ActiveQt
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| 82 | framework</a>. (To make an application into an ActiveX server
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| 83 | see the <a href="qaxserver.html">QAxServer module</a>.)
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| 84 | <p> The module consists of six classes
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| 85 | <ol type=1>
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| 86 | <li> <a href="qaxbase.html">QAxBase</a> is an abstract class that provides an API to initialize
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| 87 | and access a COM/ActiveX object.
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| 88 | <li> <a href="qaxobject.html">QAxObject</a> provides a QObject that wraps a COM object.
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| 89 | <li> <a href="qaxwidget.html">QAxWidget</a> is a <a href="qwidget.html">QWidget</a> that wraps an ActiveX control.
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| 90 | <li> <a href="qaxscriptmanager.html">QAxScriptManager</a>, QAxScript and QAxScriptEngine provide an
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| 91 | interface to the Windows Script Host.
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| 92 | </ol>
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| 93 | <p> Some <a href="qaxcontainer-examples.html">example applications</a>
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| 94 | that use standard ActiveX controls to provide high level user
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| 95 | interface functionality are provided.
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| 96 | <p> <h2> Building the library
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| 97 | </h2>
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| 98 | <a name="2"></a><p> In the <tt>activeqt</tt> directory (usually <tt>QTDIR/extensions/activeqt</tt>)
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| 99 | enter the <tt>container</tt> subdirectory and run <tt>qmake</tt> to generate the
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| 100 | makefile, and use the make tool (<tt>nmake</tt> for VC++, <tt>make</tt> for Borland)
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| 101 | to build the library. The library <tt>qaxcontainer.lib</tt> will be linked
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| 102 | into <tt>QTDIR/lib</tt>.
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| 103 | <p> If you have a shared configuration of Qt enter the <tt>plugin</tt> subdirectory
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| 104 | and run <tt>qmake</tt> and your make tool to build a plugin that integrates the
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| 105 | <a href="qaxwidget.html">QAxWidget</a> class into <a href="designer-manual.html">Qt Designer</a>.
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| 106 | <p> <h2> Using the library
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| 107 | </h2>
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| 108 | <a name="3"></a><p> To build Qt applications that can host COM objects and ActiveX controls
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| 109 | link the application against the QAxContainer module by adding
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| 110 | <p> <pre>
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| 111 | LIBS += qaxcontainer.lib
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| 112 | </pre>
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| 113 |
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| 114 | <p> to the application's <tt>.pro</tt> file.
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| 115 | <p> <h3> Distributing QAxContainer applications
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| 116 | </h3>
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| 117 | <a name="3-1"></a><p> The QAxContainer library is static, so there is no need to redistribute
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| 118 | any additional files when using this module. Note however that the
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| 119 | ActiveX server binaries you are using might not be installed on the
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| 120 | target system, so you have to ship them with your package and register
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| 121 | them during the installation process of your application.
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| 122 | <p> <h2> Instantiating COM objects
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| 123 | </h2>
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| 124 | <a name="4"></a><p> To instantiate a COM object use the <a href="qaxbase.html#setControl">QAxBase::setControl</a>() API, or pass
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| 125 | the name of the object directly into the constructor of the <a href="qaxbase.html">QAxBase</a>
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| 126 | subclass you are using.
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| 127 | <p> The control can be specified in a variety of formats, but the fastest
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| 128 | and most powerful format is to use the class ID (CLSID) of the object
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| 129 | directly. The class ID can be prepended with information about a remote
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| 130 | machine that the object should run on, and can include a license key
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| 131 | for licensed controls.
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| 132 | <p> <h2> Accessing the object API
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| 133 | </h2>
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| 134 | <a name="5"></a><p> <a href="activeqt.html#ActiveQt">ActiveQt</a> provides a Qt API to the COM object, and replaces COM
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| 135 | datatypes with Qt equivalents. Use the <tt>dumpdoc</tt> tool to get the
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| 136 | documentation of the Qt API for any COM object and it's subobjects.
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| 137 | <p> See the <a href="qaxwidget.html">QAxWidget</a> and <a href="qaxobject.html">QAxObject</a> API documentation about how to
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| 138 | use this class to use ActiveX controls and COM objects in Qt
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| 139 | applications. To access the COM object with scripting languages use
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| 140 | the <a href="qaxscript.html">QAxScript</a> class.
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| 141 | <p> To call functions of the COM object that can not be accessed via
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| 142 | ActiveQt it is possible to request the COM interface directly using
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| 143 | <a href="qaxbase.html#queryInterface">QAxBase::queryInterface</a>(). To get a C++ definition of the respective
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| 144 | interface classes use the <tt>#import</tt> directive with the type library
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| 145 | provided with the control.
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| 146 | <p> <h3> Typical error messages
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| 147 | </h3>
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| 148 | <a name="5-1"></a><p> ActiveQt prints error messages to the debug output when it
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| 149 | encounters error situations at runtime. Usually you must run
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| 150 | your program in the debugger to see these messages (e.g. in Visual
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| 151 | Studio's Debug output).
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| 152 | <p> <h4> Requested control could not be instantiated
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| 153 | </h4>
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| 154 | <a name="5-1-1"></a><p> The control requested in <a href="qaxbase.html#setControl">QAxBase::setControl</a>() is not installed
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| 155 | on this system, or is not accessible for the current user.
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| 156 | <p> The control might require administrator rights, or a license key.
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| 157 | If the control is licensed, reimplement initialize() and use the
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| 158 | COM APIs to call the IClassFactory2 interface functions.
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| 159 | <p> <h4> QAxBase::internalInvoke: No such method
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| 160 | </h4>
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| 161 | <a name="5-1-2"></a><p> A <tt>dynamicCall()</tt> failed - the function prototype did not
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| 162 | match any function available in the object's API.
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| 163 | <p> <h4> Error calling IDispatch member: Non-optional parameter
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| 164 | missing
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| 165 | </h4>
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| 166 | <a name="5-1-3"></a><p> A <tt>dynamicCall()</tt> failed - the function prototype was correct,
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| 167 | but too few parameters were provided.
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| 168 | <p> <h4> Error calling IDispatch member: Type mismatch in
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| 169 | parameter n
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| 170 | </h4>
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| 171 | <a name="5-1-4"></a><p> A <tt>dynamicCall()</tt> failed - the function prototype was correct,
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| 172 | but the paramter at index <tt>n</tt> was of the wrong type and could
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| 173 | not be coerced to the correct type.
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| 174 | <p> <h4> <a href="qaxscriptmanager.html#call">QAxScriptManager::call</a>(): No script provides this function
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| 175 | </h4>
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| 176 | <a name="5-1-5"></a><p> You try to call a function that is provided through an engine
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| 177 | that doesn't provide introspection (ie. ActivePython or
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| 178 | ActivePerl). You need to call the function directly on the
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| 179 | respective <a href="qaxscript.html">QAxScript</a> object.
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| 180 |
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| 181 | <!-- eof -->
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| 182 | <p><address><hr><div align=center>
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| 183 | <table width=100% cellspacing=0 border=0><tr>
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| 184 | <td>Copyright © 2007
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| 185 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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| 186 | <td align=right><div align=right>Qt 3.3.8</div>
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| 187 | </table></div></address></body>
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| 188 | </html>
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