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authorRobert Griebl <robert.griebl@nokia.com>2010-07-12 12:35:33 (GMT)
committerRobert Griebl <robert.griebl@nokia.com>2010-07-12 12:35:33 (GMT)
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Calling setMinimumSize(0, 0) on a top-level window sometimes triggers a bug
in the Compiz window manager which leads to the QML viewer mainwindow not being composited anymore (at least until the next resize). Since we need to somehow switch between fixed size and freely resizable views, we have to work around that bug using the layout constraint hints. Task-number: QTBUG-11771 Reviewed-by: kkoehne
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<div class="title">Property Lists Basics </div>  </div>
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<div class="textblock"><p>Navigate back: <a class="el" href="index.html">Main</a> / <a class="el" href="_getting_started.html">Getting Started with HDF5</a> / <a class="el" href="_learn_basics.html">Learning the Basics</a> </p><hr  />
<h1><a class="anchor" id="secLBPList"></a>
What is a Property (or Property List)?</h1>
<p>In HDF5, a property or property list is a characteristic or feature associated with an HDF5 object. There are default properties which handle the most common needs. These default properties are specified by passing in <a class="el" href="_h5_ppublic_8h.html#afa85e97bfbf9bf1c58e39263846c568f">H5P_DEFAULT</a> for the Property List parameter of a function. Default properties can be modified by use of the <a class="el" href="group___h5_p.html">Property Lists (H5P)</a> interface and function parameters.</p>
<p>The <a class="el" href="group___h5_p.html">Property Lists (H5P)</a> API allows a user to take advantage of the more powerful features in HDF5. It typically supports unusual cases when creating or accessing HDF5 objects. There is a programming model for working with Property Lists in HDF5 (see below).</p>
<p>For examples of modifying a property list, see these tutorial topics: </p><ul>
<li><dl class="section see"><dt>See also</dt><dd><a class="el" href="_l_b_dset_layout.html">Dataset Storage Layout</a> </dd></dl>
</li>
<li><dl class="section see"><dt>See also</dt><dd><a class="el" href="_l_b_ext_dset.html">Extendible Datasets</a> </dd></dl>
</li>
<li><dl class="section see"><dt>See also</dt><dd><a class="el" href="_l_b_com_dset.html">Compressed Datasets</a></dd></dl>
There are many Property Lists associated with creating and accessing objects in HDF5. See the <a class="el" href="group___h5_p.html">Property Lists (H5P)</a> Interface documentation in the HDF5 <a class="el" href="_r_m.html">HDF5 Reference Manual</a> for a list of the different properties associated with HDF5 interfaces.</li>
</ul>
<p>In summary: </p><ul>
<li>Properties are features of HDF5 objects, that can be changed by use of the Property List API and function parameters. </li>
<li>Property lists provide a mechanism for adding functionality to HDF5 calls without increasing the number of arguments used for a given call. </li>
<li>The Property List API supports unusual cases when creating and accessing HDF5 objects.</li>
</ul>
<h1><a class="anchor" id="secLBPListProg"></a>
Programming Model</h1>
<p>Default properties are specified by simply passing in <a class="el" href="_h5_ppublic_8h.html#afa85e97bfbf9bf1c58e39263846c568f">H5P_DEFAULT</a> (C) / H5P_DEFAULT_F (F90) for the property list parameter in those functions for which properties can be changed.</p>
<p>The programming model for changing a property list is as follows: </p><ul>
<li>Create a copy or "instance" of the desired pre-defined property type, using the <a class="el" href="group___p_l_c_r.html#gaf1b11da01d4d45d788c45f8bc5f0cbfa" title="Creates a new property list as an instance of a property list class.">H5Pcreate</a> call. This will return a property list identifier. Please see the <a class="el" href="_r_m.html">HDF5 Reference Manual</a> entry for <a class="el" href="group___p_l_c_r.html#gaf1b11da01d4d45d788c45f8bc5f0cbfa" title="Creates a new property list as an instance of a property list class.">H5Pcreate</a>, for a comprehensive list of the property types. </li>
<li>With the property list identifier, modify the property, using the <a class="el" href="group___h5_p.html">Property Lists (H5P)</a> APIs. </li>
<li>Modify the object feature, by passing the property list identifier into the corresponding HDF5 object function. </li>
<li>Close the property list when done, using <a class="el" href="group___p_l_c_r.html#ga5dce61149211d3ef319452aa598887fb" title="Terminates access to a property list.">H5Pclose</a>.</li>
</ul>
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