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<div class="navpath"><a class="el" href="namespacehippodraw.html">hippodraw</a>::<a class="el" href="classhippodraw_1_1Observer.html">Observer</a>
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<h1>Observer Class Reference</h1><!-- doxytag: class="hippodraw::Observer" -->
<p>Part of an implementation of the <a class="el" href="classhippodraw_1_1Observable.html" title="Part of an implementation of the Observable-Observer pattern based on the example...">Observable</a> <a class="el" href="classhippodraw_1_1Observer.html" title="Part of an implementation of the Observable Observer pattern based on the example...">Observer</a> pattern based on the example implementation in the GOF Patterns text.
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="Observer_8h_source.html">Observer.h</a>></code></p>
<div class="dynheader">
Inheritance diagram for Observer:</div>
<div class="dynsection">
<div class="center"><img src="classhippodraw_1_1Observer__inherit__graph.gif" border="0" usemap="#Observer_inherit__map" alt="Inheritance graph"/></div>
<map name="Observer_inherit__map" id="Observer_inherit__map">
<area shape="rect" id="node3" href="classhippodraw_1_1DataRep.html" title="The base class for data representations." alt="" coords="164,512,239,541"/><area shape="rect" id="node49" href="classhippodraw_1_1DataSourceController.html" title="A singleton class that is the interface between GUI and the DataSource objects." alt="" coords="128,979,275,1008"/><area shape="rect" id="node51" href="classhippodraw_1_1ObserverWrap.html" title="A wrapper class for Observer to allow its pure virtual function to be implemented..." alt="" coords="148,1032,255,1061"/><area shape="rect" id="node53" href="classhippodraw_1_1PlotterBase.html" title="The base class for the PlotterBase hierarchy." alt="" coords="156,1085,247,1115"/><area shape="rect" id="node61" href="classhippodraw_1_1ProjectorBase.html" title="The base class for the Projector hierarchy." alt="" coords="149,1165,253,1195"/><area shape="rect" id="node95" href="classhippodraw_1_1RootController.html" title="A Controller class for ROOT files." alt="" coords="148,1219,255,1248"/><area shape="rect" id="node97" href="classhippodraw_1_1ViewBase.html" title="The abstract base class for views." alt="" coords="161,1364,241,1393"/><area shape="rect" id="node5" href="classhippodraw_1_1ColorPlot.html" title="A DataRep for a two dimensional histogram by showing the density of any bin with..." alt="" coords="372,272,447,301"/><area shape="rect" id="node7" href="classhippodraw_1_1ContourPlot.html" title="A DataRep for a two dimensional histogram by showing the density of any bin with..." alt="" coords="364,325,455,355"/><area shape="rect" id="node9" href="classhippodraw_1_1DyHistogram.html" title="A derived class of DataRep that creates a one dimensional dynamic histogram display..." alt="" coords="360,379,459,408"/><area shape="rect" id="node11" href="classhippodraw_1_1DyHistogramEqualEntries.html" title="A derived class of DataRep that creates a one dimensional dynamic histogram display..." alt="" coords="323,432,496,461"/><area shape="rect" id="node13" href="classhippodraw_1_1FunctionRep.html" title="A derived class of DataRep which is a base class for displaying a function." alt="" coords="361,485,457,515"/><area shape="rect" id="node21" href="classhippodraw_1_1Image.html" title="Displays on the Z axis the values of a single column treated as a matrix of values..." alt="" coords="380,539,439,568"/><area shape="rect" id="node23" href="classhippodraw_1_1LineDataRep.html" title="A derived class of DataRep which displays a value as a line along the X or Y axis..." alt="" coords="360,592,459,621"/><area shape="rect" id="node25" href="classhippodraw_1_1Profile2D.html" title="A DataRep for two dimensional profile." alt="" coords="372,645,447,675"/><area shape="rect" id="node27" href="classhippodraw_1_1ProfileContour.html" title="A DataRep for two dimensional profile." alt="" coords="357,699,461,728"/><area shape="rect" id="node29" href="classhippodraw_1_1ProfileHist.html" title="A DataRep showing a profile." alt="" coords="368,752,451,781"/><area shape="rect" id="node31" href="classhippodraw_1_1ScatterPlot.html" title="A DataRep taking two columns and plotting their values as a small dot." alt="" coords="367,805,452,835"/><area shape="rect" id="node33" href="classhippodraw_1_1St1DHistogram.html" title="A derived class of DataRep that creates a one dimensional static histogram display..." alt="" coords="353,859,465,888"/><area shape="rect" id="node35" href="classhippodraw_1_1St2DHistogram.html" title="A derived class of DataRep that creates a two dimensional static histogram display..." alt="" coords="353,912,465,941"/><area shape="rect" id="node37" href="classhippodraw_1_1StripChart.html" title="A derived class of DataRep which functions as a strip chart." alt="" coords="369,965,449,995"/><area shape="rect" id="node39" href="classhippodraw_1_1TextDataRep.html" title="Displays data in textual representation." alt="" coords="360,5,459,35"/><area shape="rect" id="node41" href="classhippodraw_1_1VariableMesh.html" title="Displays X Y mesh." alt="" coords="359,59,460,88"/><area shape="rect" id="node43" href="classhippodraw_1_1XYPlot.html" title="Displays X Y pairs with or without error bars." alt="" coords="379,112,440,141"/><area shape="rect" id="node45" href="classhippodraw_1_1XYZPlot.html" title="A DataRep that displays a triplet of data from three columns, two on the X and Y..." alt="" coords="375,165,444,195"/><area shape="rect" id="node47" href="classhippodraw_1_1YPlot.html" title="Displays on the Y axis the values of a single column using the row number as the..." alt="" coords="383,219,436,248"/><area shape="rect" id="node15" href="classhippodraw_1_1CompositeFunctionRep.html" title="A Derived class of FunctionRep which hold a composite function." alt="" coords="560,432,717,461"/><area shape="rect" id="node17" href="classhippodraw_1_1FunctionRep1.html" title="A derived class of FunctionRep that handles functions with only 1 coordinate." alt="" 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href="classhippodraw_1_1Map1Projector.html" title="A derived class of NTupleProjector that maps 1 DataSource column to a Y axis of two..." alt="" coords="585,1520,692,1549"/><area shape="rect" id="node89" href="classhippodraw_1_1Map2Projector.html" title="A derived class of NTupleProjector that maps 2 ntuple columns to a two dimensional..." alt="" coords="585,1309,692,1339"/><area shape="rect" id="node91" href="classhippodraw_1_1Map3Projector.html" title="A derived class of NTupleProjector that maps 3 DataSource columns to a 3-dimensional..." alt="" coords="585,1363,692,1392"/><area shape="rect" id="node99" href="classhippodraw_1_1DataView.html" title="The abstract base class for views that have a region for drawing data points with..." alt="" coords="371,1417,448,1447"/><area shape="rect" id="node101" href="classhippodraw_1_1GroupViewBase.html" title="This is the abstract base class for a group view." alt="" coords="352,1364,467,1393"/></map>
<center><span class="legend">[<a href="graph_legend.html">legend</a>]</span></center></div>
<p><a href="classhippodraw_1_1Observer-members.html">List of all members.</a></p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classhippodraw_1_1Observer.html#abbd00a8000bd3ee5cd7e35aeb436f937">Observer</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">The default constructor. <a href="#abbd00a8000bd3ee5cd7e35aeb436f937"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classhippodraw_1_1Observer.html#ab42954b72ba11d6f27a226f712ea77be">update</a> (const <a class="el" href="classhippodraw_1_1Observable.html">Observable</a> *)=0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">The update method. <a href="#ab42954b72ba11d6f27a226f712ea77be"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classhippodraw_1_1Observer.html#a5380948822be75c060ae8cc538cd1327">willDelete</a> (const <a class="el" href="classhippodraw_1_1Observable.html">Observable</a> *)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Notifies <code>this</code> <a class="el" href="classhippodraw_1_1Observer.html" title="Part of an implementation of the Observable Observer pattern based on the example...">Observer</a> object that one of its <a class="el" href="classhippodraw_1_1Observable.html" title="Part of an implementation of the Observable-Observer pattern based on the example...">Observable</a> objects is about to be deleted. <a href="#a5380948822be75c060ae8cc538cd1327"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classhippodraw_1_1Observer.html#a0cb58450d0039d83b21363773e589615">~Observer</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">The destructor. <a href="#a0cb58450d0039d83b21363773e589615"></a><br/></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>Part of an implementation of the <a class="el" href="classhippodraw_1_1Observable.html" title="Part of an implementation of the Observable-Observer pattern based on the example...">Observable</a> <a class="el" href="classhippodraw_1_1Observer.html" title="Part of an implementation of the Observable Observer pattern based on the example...">Observer</a> pattern based on the example implementation in the GOF Patterns text. </p>
<dl class="author"><dt><b>Author:</b></dt><dd>Paul F. Kunz <<a href="mailto:Paul_Kunz@slac.stanford.edu">Paul_Kunz@slac.stanford.edu</a>></dd></dl>
<dl class="note"><dt><b>Note:</b></dt><dd>Giulio Eulisse <<a href="mailto:giulio.eulisse@cern.ch">giulio.eulisse@cern.ch</a>> put this class in namespace hippodraw so that it wouldn't clash with a Corbra <a class="el" href="classhippodraw_1_1Observer.html" title="Part of an implementation of the Observable Observer pattern based on the example...">Observer</a> and contributed all the code that needed changing. </dd></dl>
<p>Definition at line <a class="el" href="Observer_8h_source.html#l00034">34</a> of file <a class="el" href="Observer_8h_source.html">Observer.h</a>.</p>
<hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="abbd00a8000bd3ee5cd7e35aeb436f937"></a><!-- doxytag: member="hippodraw::Observer::Observer" ref="abbd00a8000bd3ee5cd7e35aeb436f937" args="()" -->
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<td class="memname"><a class="el" href="classhippodraw_1_1Observer.html">Observer</a> </td>
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<p>The default constructor. </p>
<dl class="note"><dt><b>Note:</b></dt><dd>Needs to be public because of SIP. </dd></dl>
<p>Definition at line <a class="el" href="Observer_8cxx_source.html#l00013">13</a> of file <a class="el" href="Observer_8cxx_source.html">Observer.cxx</a>.</p>
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<a class="anchor" id="a0cb58450d0039d83b21363773e589615"></a><!-- doxytag: member="hippodraw::Observer::~Observer" ref="a0cb58450d0039d83b21363773e589615" args="()" -->
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<td class="memname">~<a class="el" href="classhippodraw_1_1Observer.html">Observer</a> </td>
<td>(</td>
<td class="paramname"></td>
<td> ) </td>
<td><code> [virtual]</code></td>
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<p>The destructor. </p>
<p>Does nothing but keep compiler warning messages away.</p>
<dl class="note"><dt><b>Note:</b></dt><dd>Needs to be public because of SIP. </dd></dl>
<p>Definition at line <a class="el" href="Observer_8cxx_source.html#l00018">18</a> of file <a class="el" href="Observer_8cxx_source.html">Observer.cxx</a>.</p>
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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="ab42954b72ba11d6f27a226f712ea77be"></a><!-- doxytag: member="hippodraw::Observer::update" ref="ab42954b72ba11d6f27a226f712ea77be" args="(const Observable *)=0" -->
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<td class="memname">virtual void update </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classhippodraw_1_1Observable.html">Observable</a> * </td>
<td class="paramname"></td>
<td> ) </td>
<td><code> [pure virtual]</code></td>
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<p>The update method. </p>
<p>This member function is called by the observed <a class="el" href="classhippodraw_1_1Observable.html" title="Part of an implementation of the Observable-Observer pattern based on the example...">Observable</a> when its state has changed The Command argument is optional and may be a null pointer. </p>
<p>Implemented in <a class="el" href="classhippodraw_1_1DataRep.html#ae6b85d8f95c1889865463b18e33d08a5">DataRep</a>, <a class="el" href="classhippodraw_1_1DataSourceController.html#ae6b85d8f95c1889865463b18e33d08a5">DataSourceController</a>, <a class="el" href="classhippodraw_1_1EpsView.html#ae6b85d8f95c1889865463b18e33d08a5">EpsView</a>, <a class="el" href="classhippodraw_1_1ViewBase.html#ab42954b72ba11d6f27a226f712ea77be">ViewBase</a>, <a class="el" href="classOpenGLView.html#a4d056ec014a165245769dd2a45e6bd34">OpenGLView</a>, <a class="el" href="classhippodraw_1_1CutPlotter.html#abfdd19da76de4ac910239e66d2612ed9">CutPlotter</a>, <a class="el" href="classhippodraw_1_1PlotterBase.html#ae6b85d8f95c1889865463b18e33d08a5">PlotterBase</a>, <a class="el" href="classhippodraw_1_1BinningProjector.html#abfdd19da76de4ac910239e66d2612ed9">BinningProjector</a>, <a class="el" href="classhippodraw_1_1DyHist1DProjector.html#abfdd19da76de4ac910239e66d2612ed9">DyHist1DProjector</a>, <a class="el" href="classhippodraw_1_1DyHist2DProjector.html#abfdd19da76de4ac910239e66d2612ed9">DyHist2DProjector</a>, <a class="el" href="classhippodraw_1_1NTupleProjector.html#ae6b85d8f95c1889865463b18e33d08a5">NTupleProjector</a>, <a class="el" href="classhippodraw_1_1Profile2DProjector.html#abfdd19da76de4ac910239e66d2612ed9">Profile2DProjector</a>, <a class="el" href="classhippodraw_1_1ProfileProjector.html#abfdd19da76de4ac910239e66d2612ed9">ProfileProjector</a>, <a class="el" href="classhippodraw_1_1ProjectorBase.html#ae6b85d8f95c1889865463b18e33d08a5">ProjectorBase</a>, <a class="el" href="classhippodraw_1_1ObserverWrap.html#ae6b85d8f95c1889865463b18e33d08a5">ObserverWrap</a>, <a class="el" href="classhippodraw_1_1QtView.html#ae6b85d8f95c1889865463b18e33d08a5">QtView</a>, <a class="el" href="classhippodraw_1_1QtViewImp.html#a56af9c4d342300af40cb86cdc1e12aad">QtViewImp</a>, <a class="el" href="classhippodraw_1_1QtViewWidget.html#ae6b85d8f95c1889865463b18e33d08a5">QtViewWidget</a>, and <a class="el" href="classhippodraw_1_1RootController.html#ae6b85d8f95c1889865463b18e33d08a5">RootController</a>.</p>
<p>Referenced by <a class="el" href="Observable_8cxx_source.html#l00093">Observable::notifyObservers()</a>.</p>
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<a class="anchor" id="a5380948822be75c060ae8cc538cd1327"></a><!-- doxytag: member="hippodraw::Observer::willDelete" ref="a5380948822be75c060ae8cc538cd1327" args="(const Observable *)" -->
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<td class="memname">void willDelete </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classhippodraw_1_1Observable.html">Observable</a> * </td>
<td class="paramname"></td>
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<td><code> [virtual]</code></td>
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<p>Notifies <code>this</code> <a class="el" href="classhippodraw_1_1Observer.html" title="Part of an implementation of the Observable Observer pattern based on the example...">Observer</a> object that one of its <a class="el" href="classhippodraw_1_1Observable.html" title="Part of an implementation of the Observable-Observer pattern based on the example...">Observable</a> objects is about to be deleted. </p>
<p>Since most <a class="el" href="classhippodraw_1_1Observable.html" title="Part of an implementation of the Observable-Observer pattern based on the example...">Observable</a> objects are owned by its <a class="el" href="classhippodraw_1_1Observer.html" title="Part of an implementation of the Observable Observer pattern based on the example...">Observer</a>, it is the <a class="el" href="classhippodraw_1_1Observer.html" title="Part of an implementation of the Observable Observer pattern based on the example...">Observer</a> that issued the delete. Thus the default implementation here does nothing. Derived classes that observe objects owned by another should implement this method to remove the <a class="el" href="classhippodraw_1_1Observable.html" title="Part of an implementation of the Observable-Observer pattern based on the example...">Observable</a> from the list they are observing. </p>
<p>Reimplemented in <a class="el" href="classhippodraw_1_1FunctionRep.html#a7e322f64d0478fb7242050addc7cce53">FunctionRep</a>, <a class="el" href="classhippodraw_1_1DataSourceController.html#a9ecb59d06196f351e82553081eb39207">DataSourceController</a>, <a class="el" href="classhippodraw_1_1ViewBase.html#a6ace0de18514ca0d0b5c9d331bde7f36">ViewBase</a>, <a class="el" href="classhippodraw_1_1CutPlotter.html#a486e625e490369e6e75cce2e38ed1774">CutPlotter</a>, <a class="el" href="classhippodraw_1_1TextPlotter.html#a486e625e490369e6e75cce2e38ed1774">TextPlotter</a>, <a class="el" href="classhippodraw_1_1BinningProjector.html#af844b7651dc35543e5b0904e3153db16">BinningProjector</a>, <a class="el" href="classhippodraw_1_1DyHist1DProjector.html#af844b7651dc35543e5b0904e3153db16">DyHist1DProjector</a>, <a class="el" href="classhippodraw_1_1DyHist2DProjector.html#af844b7651dc35543e5b0904e3153db16">DyHist2DProjector</a>, <a class="el" href="classhippodraw_1_1NTupleProjector.html#a5380948822be75c060ae8cc538cd1327">NTupleProjector</a>, <a class="el" href="classhippodraw_1_1Profile2DProjector.html#af844b7651dc35543e5b0904e3153db16">Profile2DProjector</a>, <a class="el" href="classhippodraw_1_1ProfileProjector.html#af844b7651dc35543e5b0904e3153db16">ProfileProjector</a>, and <a class="el" href="classhippodraw_1_1RootController.html#adefbc387148a9902e36e5768871713ce">RootController</a>.</p>
<p>Definition at line <a class="el" href="Observer_8cxx_source.html#l00025">25</a> of file <a class="el" href="Observer_8cxx_source.html">Observer.cxx</a>.</p>
<p>Referenced by <a class="el" href="DataRep_8cxx_source.html#l00058">DataRep::~DataRep()</a>, <a class="el" href="DataSource_8cxx_source.html#l00107">DataSource::~DataSource()</a>, <a class="el" href="NTuple_8cxx_source.html#l00123">NTuple::~NTuple()</a>, <a class="el" href="PlotterBase_8cxx_source.html#l00078">PlotterBase::~PlotterBase()</a>, <a class="el" href="RootNTuple_8cxx_source.html#l00063">RootNTuple::~RootNTuple()</a>, and <a class="el" href="RTuple_8cxx_source.html#l00066">RTuple::~RTuple()</a>.</p>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="Observer_8h_source.html">Observer.h</a></li>
<li><a class="el" href="Observer_8cxx_source.html">Observer.cxx</a></li>
</ul>
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