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<div class="section" id="user-interfaces-example-code-embedding-in-wx2-py">
<span id="user-interfaces-embedding-in-wx2"></span><h1>user_interfaces example code: embedding_in_wx2.py<a class="headerlink" href="#user-interfaces-example-code-embedding-in-wx2-py" title="Permalink to this headline">ΒΆ</a></h1>
<p>[<a class="reference external" href="embedding_in_wx2.py">source code</a>]</p>
<div class="highlight-python"><div class="highlight"><pre><span class="c">#!/usr/bin/env python</span>
<span class="sd">"""</span>
<span class="sd">An example of how to use wx or wxagg in an application with the new</span>
<span class="sd">toolbar - comment out the setA_toolbar line for no toolbar</span>
<span class="sd">"""</span>
<span class="c"># Used to guarantee to use at least Wx2.8</span>
<span class="kn">import</span> <span class="nn">wxversion</span>
<span class="n">wxversion</span><span class="o">.</span><span class="n">ensureMinimal</span><span class="p">(</span><span class="s">'2.8'</span><span class="p">)</span>
<span class="kn">from</span> <span class="nn">numpy</span> <span class="kn">import</span> <span class="n">arange</span><span class="p">,</span> <span class="n">sin</span><span class="p">,</span> <span class="n">pi</span>
<span class="kn">import</span> <span class="nn">matplotlib</span>
<span class="c"># uncomment the following to use wx rather than wxagg</span>
<span class="c">#matplotlib.use('WX')</span>
<span class="c">#from matplotlib.backends.backend_wx import FigureCanvasWx as FigureCanvas</span>
<span class="c"># comment out the following to use wx rather than wxagg</span>
<span class="n">matplotlib</span><span class="o">.</span><span class="n">use</span><span class="p">(</span><span class="s">'WXAgg'</span><span class="p">)</span>
<span class="kn">from</span> <span class="nn">matplotlib.backends.backend_wxagg</span> <span class="kn">import</span> <span class="n">FigureCanvasWxAgg</span> <span class="k">as</span> <span class="n">FigureCanvas</span>
<span class="kn">from</span> <span class="nn">matplotlib.backends.backend_wx</span> <span class="kn">import</span> <span class="n">NavigationToolbar2Wx</span>
<span class="kn">from</span> <span class="nn">matplotlib.figure</span> <span class="kn">import</span> <span class="n">Figure</span>
<span class="kn">import</span> <span class="nn">wx</span>
<span class="k">class</span> <span class="nc">CanvasFrame</span><span class="p">(</span><span class="n">wx</span><span class="o">.</span><span class="n">Frame</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">wx</span><span class="o">.</span><span class="n">Frame</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="bp">None</span><span class="p">,</span><span class="o">-</span><span class="mi">1</span><span class="p">,</span>
<span class="s">'CanvasFrame'</span><span class="p">,</span><span class="n">size</span><span class="o">=</span><span class="p">(</span><span class="mi">550</span><span class="p">,</span><span class="mi">350</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">SetBackgroundColour</span><span class="p">(</span><span class="n">wx</span><span class="o">.</span><span class="n">NamedColour</span><span class="p">(</span><span class="s">"WHITE"</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">figure</span> <span class="o">=</span> <span class="n">Figure</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">axes</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">figure</span><span class="o">.</span><span class="n">add_subplot</span><span class="p">(</span><span class="mi">111</span><span class="p">)</span>
<span class="n">t</span> <span class="o">=</span> <span class="n">arange</span><span class="p">(</span><span class="mf">0.0</span><span class="p">,</span><span class="mf">3.0</span><span class="p">,</span><span class="mf">0.01</span><span class="p">)</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">sin</span><span class="p">(</span><span class="mi">2</span><span class="o">*</span><span class="n">pi</span><span class="o">*</span><span class="n">t</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">axes</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">t</span><span class="p">,</span><span class="n">s</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">canvas</span> <span class="o">=</span> <span class="n">FigureCanvas</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">figure</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">sizer</span> <span class="o">=</span> <span class="n">wx</span><span class="o">.</span><span class="n">BoxSizer</span><span class="p">(</span><span class="n">wx</span><span class="o">.</span><span class="n">VERTICAL</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">sizer</span><span class="o">.</span><span class="n">Add</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">canvas</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">wx</span><span class="o">.</span><span class="n">LEFT</span> <span class="o">|</span> <span class="n">wx</span><span class="o">.</span><span class="n">TOP</span> <span class="o">|</span> <span class="n">wx</span><span class="o">.</span><span class="n">GROW</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">SetSizer</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">sizer</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">Fit</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">add_toolbar</span><span class="p">()</span> <span class="c"># comment this out for no toolbar</span>
<span class="k">def</span> <span class="nf">add_toolbar</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">toolbar</span> <span class="o">=</span> <span class="n">NavigationToolbar2Wx</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">canvas</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">toolbar</span><span class="o">.</span><span class="n">Realize</span><span class="p">()</span>
<span class="k">if</span> <span class="n">wx</span><span class="o">.</span><span class="n">Platform</span> <span class="o">==</span> <span class="s">'__WXMAC__'</span><span class="p">:</span>
<span class="c"># Mac platform (OSX 10.3, MacPython) does not seem to cope with</span>
<span class="c"># having a toolbar in a sizer. This work-around gets the buttons</span>
<span class="c"># back, but at the expense of having the toolbar at the top</span>
<span class="bp">self</span><span class="o">.</span><span class="n">SetToolBar</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">toolbar</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="c"># On Windows platform, default window size is incorrect, so set</span>
<span class="c"># toolbar width to figure width.</span>
<span class="n">tw</span><span class="p">,</span> <span class="n">th</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">toolbar</span><span class="o">.</span><span class="n">GetSizeTuple</span><span class="p">()</span>
<span class="n">fw</span><span class="p">,</span> <span class="n">fh</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">canvas</span><span class="o">.</span><span class="n">GetSizeTuple</span><span class="p">()</span>
<span class="c"># By adding toolbar in sizer, we are able to put it at the bottom</span>
<span class="c"># of the frame - so appearance is closer to GTK version.</span>
<span class="c"># As noted above, doesn't work for Mac.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">toolbar</span><span class="o">.</span><span class="n">SetSize</span><span class="p">(</span><span class="n">wx</span><span class="o">.</span><span class="n">Size</span><span class="p">(</span><span class="n">fw</span><span class="p">,</span> <span class="n">th</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">sizer</span><span class="o">.</span><span class="n">Add</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">toolbar</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">wx</span><span class="o">.</span><span class="n">LEFT</span> <span class="o">|</span> <span class="n">wx</span><span class="o">.</span><span class="n">EXPAND</span><span class="p">)</span>
<span class="c"># update the axes menu on the toolbar</span>
<span class="bp">self</span><span class="o">.</span><span class="n">toolbar</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">OnPaint</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">canvas</span><span class="o">.</span><span class="n">draw</span><span class="p">()</span>
<span class="k">class</span> <span class="nc">App</span><span class="p">(</span><span class="n">wx</span><span class="o">.</span><span class="n">App</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">OnInit</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="s">'Create the main window and insert the custom frame'</span>
<span class="n">frame</span> <span class="o">=</span> <span class="n">CanvasFrame</span><span class="p">()</span>
<span class="n">frame</span><span class="o">.</span><span class="n">Show</span><span class="p">(</span><span class="bp">True</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">True</span>
<span class="n">app</span> <span class="o">=</span> <span class="n">App</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="n">app</span><span class="o">.</span><span class="n">MainLoop</span><span class="p">()</span>
</pre></div>
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<p>Keywords: python, matplotlib, pylab, example, codex (see <a class="reference internal" href="../../faq/howto_faq.html#how-to-search-examples"><em>Search examples</em></a>)</p>
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