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<div class="section" id="user-interfaces-example-code-embedding-in-wx3-py">
<span id="user-interfaces-embedding-in-wx3"></span><h1>user_interfaces example code: embedding_in_wx3.py<a class="headerlink" href="#user-interfaces-example-code-embedding-in-wx3-py" title="Permalink to this headline">ΒΆ</a></h1>
<p>[<a class="reference external" href="embedding_in_wx3.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">Copyright (C) 2003-2004 Andrew Straw, Jeremy O'Donoghue and others</span>
<span class="sd">License: This work is licensed under the PSF. A copy should be included</span>
<span class="sd">with this source code, and is also available at</span>
<span class="sd">http://www.python.org/psf/license.html</span>
<span class="sd">This is yet another example of using matplotlib with wx. Hopefully</span>
<span class="sd">this is pretty full-featured:</span>
<span class="sd"> - both matplotlib toolbar and WX buttons manipulate plot</span>
<span class="sd"> - full wxApp framework, including widget interaction</span>
<span class="sd"> - XRC (XML wxWidgets resource) file to create GUI (made with XRCed)</span>
<span class="sd">This was derived from embedding_in_wx and dynamic_image_wxagg.</span>
<span class="sd">Thanks to matplotlib and wx teams for creating such great software!</span>
<span class="sd">"""</span>
<span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">print_function</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">import</span> <span class="nn">sys</span><span class="o">,</span> <span class="nn">time</span><span class="o">,</span> <span class="nn">os</span><span class="o">,</span> <span class="nn">gc</span>
<span class="kn">import</span> <span class="nn">matplotlib</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">import</span> <span class="nn">matplotlib.cm</span> <span class="kn">as</span> <span class="nn">cm</span>
<span class="kn">import</span> <span class="nn">matplotlib.cbook</span> <span class="kn">as</span> <span class="nn">cbook</span>
<span class="kn">from</span> <span class="nn">matplotlib.backends.backend_wxagg</span> <span class="kn">import</span> <span class="n">Toolbar</span><span class="p">,</span> <span class="n">FigureCanvasWxAgg</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">numpy</span> <span class="kn">as</span> <span class="nn">np</span>
<span class="kn">import</span> <span class="nn">wx</span>
<span class="kn">import</span> <span class="nn">wx.xrc</span> <span class="kn">as</span> <span class="nn">xrc</span>
<span class="n">ERR_TOL</span> <span class="o">=</span> <span class="mf">1e-5</span> <span class="c"># floating point slop for peak-detection</span>
<span class="n">matplotlib</span><span class="o">.</span><span class="n">rc</span><span class="p">(</span><span class="s">'image'</span><span class="p">,</span> <span class="n">origin</span><span class="o">=</span><span class="s">'lower'</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">PlotPanel</span><span class="p">(</span><span class="n">wx</span><span class="o">.</span><span class="n">Panel</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">parent</span><span class="p">):</span>
<span class="n">wx</span><span class="o">.</span><span class="n">Panel</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="n">parent</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">fig</span> <span class="o">=</span> <span class="n">Figure</span><span class="p">((</span><span class="mi">5</span><span class="p">,</span><span class="mi">4</span><span class="p">),</span> <span class="mi">75</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">FigureCanvasWxAgg</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">fig</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">Toolbar</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="c">#matplotlib toolbar</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="c">#self.toolbar.set_active([0,1])</span>
<span class="c"># Now put all into a sizer</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="c"># This way of adding to sizer allows resizing</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="c"># Best to allow the toolbar to resize!</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">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="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="k">def</span> <span class="nf">init_plot_data</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">a</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">fig</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">x</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">arange</span><span class="p">(</span><span class="mf">120.0</span><span class="p">)</span><span class="o">*</span><span class="mi">2</span><span class="o">*</span><span class="n">np</span><span class="o">.</span><span class="n">pi</span><span class="o">/</span><span class="mf">60.0</span>
<span class="n">y</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">arange</span><span class="p">(</span><span class="mf">100.0</span><span class="p">)</span><span class="o">*</span><span class="mi">2</span><span class="o">*</span><span class="n">np</span><span class="o">.</span><span class="n">pi</span><span class="o">/</span><span class="mf">50.0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">x</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">y</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">meshgrid</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">)</span>
<span class="n">z</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">sin</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">x</span><span class="p">)</span> <span class="o">+</span> <span class="n">np</span><span class="o">.</span><span class="n">cos</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">y</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">im</span> <span class="o">=</span> <span class="n">a</span><span class="o">.</span><span class="n">imshow</span><span class="p">(</span> <span class="n">z</span><span class="p">,</span> <span class="n">cmap</span><span class="o">=</span><span class="n">cm</span><span class="o">.</span><span class="n">jet</span><span class="p">)</span><span class="c">#, interpolation='nearest')</span>
<span class="n">zmax</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">amax</span><span class="p">(</span><span class="n">z</span><span class="p">)</span> <span class="o">-</span> <span class="n">ERR_TOL</span>
<span class="n">ymax_i</span><span class="p">,</span> <span class="n">xmax_i</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">nonzero</span><span class="p">(</span><span class="n">z</span> <span class="o">>=</span> <span class="n">zmax</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">im</span><span class="o">.</span><span class="n">origin</span> <span class="o">==</span> <span class="s">'upper'</span><span class="p">:</span>
<span class="n">ymax_i</span> <span class="o">=</span> <span class="n">z</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">-</span><span class="n">ymax_i</span>
<span class="bp">self</span><span class="o">.</span><span class="n">lines</span> <span class="o">=</span> <span class="n">a</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">xmax_i</span><span class="p">,</span><span class="n">ymax_i</span><span class="p">,</span><span class="s">'ko'</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">update</span><span class="p">()</span> <span class="c"># Not sure why this is needed - ADS</span>
<span class="k">def</span> <span class="nf">GetToolBar</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c"># You will need to override GetToolBar if you are using an</span>
<span class="c"># unmanaged toolbar in your frame</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">toolbar</span>
<span class="k">def</span> <span class="nf">OnWhiz</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">evt</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">x</span> <span class="o">+=</span> <span class="n">np</span><span class="o">.</span><span class="n">pi</span><span class="o">/</span><span class="mi">15</span>
<span class="bp">self</span><span class="o">.</span><span class="n">y</span> <span class="o">+=</span> <span class="n">np</span><span class="o">.</span><span class="n">pi</span><span class="o">/</span><span class="mi">20</span>
<span class="n">z</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">sin</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">x</span><span class="p">)</span> <span class="o">+</span> <span class="n">np</span><span class="o">.</span><span class="n">cos</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">y</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">im</span><span class="o">.</span><span class="n">set_array</span><span class="p">(</span><span class="n">z</span><span class="p">)</span>
<span class="n">zmax</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">amax</span><span class="p">(</span><span class="n">z</span><span class="p">)</span> <span class="o">-</span> <span class="n">ERR_TOL</span>
<span class="n">ymax_i</span><span class="p">,</span> <span class="n">xmax_i</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">nonzero</span><span class="p">(</span><span class="n">z</span> <span class="o">>=</span> <span class="n">zmax</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">im</span><span class="o">.</span><span class="n">origin</span> <span class="o">==</span> <span class="s">'upper'</span><span class="p">:</span>
<span class="n">ymax_i</span> <span class="o">=</span> <span class="n">z</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">-</span><span class="n">ymax_i</span>
<span class="bp">self</span><span class="o">.</span><span class="n">lines</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">set_data</span><span class="p">(</span><span class="n">xmax_i</span><span class="p">,</span><span class="n">ymax_i</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">def</span> <span class="nf">onEraseBackground</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">evt</span><span class="p">):</span>
<span class="c"># this is supposed to prevent redraw flicker on some X servers...</span>
<span class="k">pass</span>
<span class="k">class</span> <span class="nc">MyApp</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="n">xrcfile</span> <span class="o">=</span> <span class="n">cbook</span><span class="o">.</span><span class="n">get_sample_data</span><span class="p">(</span><span class="s">'embedding_in_wx3.xrc'</span><span class="p">,</span> <span class="n">asfileobj</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="s">'loading'</span><span class="p">,</span> <span class="n">xrcfile</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">res</span> <span class="o">=</span> <span class="n">xrc</span><span class="o">.</span><span class="n">XmlResource</span><span class="p">(</span><span class="n">xrcfile</span><span class="p">)</span>
<span class="c"># main frame and panel ---------</span>
<span class="bp">self</span><span class="o">.</span><span class="n">frame</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">res</span><span class="o">.</span><span class="n">LoadFrame</span><span class="p">(</span><span class="bp">None</span><span class="p">,</span><span class="s">"MainFrame"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">panel</span> <span class="o">=</span> <span class="n">xrc</span><span class="o">.</span><span class="n">XRCCTRL</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">frame</span><span class="p">,</span><span class="s">"MainPanel"</span><span class="p">)</span>
<span class="c"># matplotlib panel -------------</span>
<span class="c"># container for matplotlib panel (I like to make a container</span>
<span class="c"># panel for our panel so I know where it'll go when in XRCed.)</span>
<span class="n">plot_container</span> <span class="o">=</span> <span class="n">xrc</span><span class="o">.</span><span class="n">XRCCTRL</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">frame</span><span class="p">,</span><span class="s">"plot_container_panel"</span><span class="p">)</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="c"># matplotlib panel itself</span>
<span class="bp">self</span><span class="o">.</span><span class="n">plotpanel</span> <span class="o">=</span> <span class="n">PlotPanel</span><span class="p">(</span><span class="n">plot_container</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">plotpanel</span><span class="o">.</span><span class="n">init_plot_data</span><span class="p">()</span>
<span class="c"># wx boilerplate</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">plotpanel</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">EXPAND</span><span class="p">)</span>
<span class="n">plot_container</span><span class="o">.</span><span class="n">SetSizer</span><span class="p">(</span><span class="n">sizer</span><span class="p">)</span>
<span class="c"># whiz button ------------------</span>
<span class="n">whiz_button</span> <span class="o">=</span> <span class="n">xrc</span><span class="o">.</span><span class="n">XRCCTRL</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">frame</span><span class="p">,</span><span class="s">"whiz_button"</span><span class="p">)</span>
<span class="n">wx</span><span class="o">.</span><span class="n">EVT_BUTTON</span><span class="p">(</span><span class="n">whiz_button</span><span class="p">,</span> <span class="n">whiz_button</span><span class="o">.</span><span class="n">GetId</span><span class="p">(),</span>
<span class="bp">self</span><span class="o">.</span><span class="n">plotpanel</span><span class="o">.</span><span class="n">OnWhiz</span><span class="p">)</span>
<span class="c"># bang button ------------------</span>
<span class="n">bang_button</span> <span class="o">=</span> <span class="n">xrc</span><span class="o">.</span><span class="n">XRCCTRL</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">frame</span><span class="p">,</span><span class="s">"bang_button"</span><span class="p">)</span>
<span class="n">wx</span><span class="o">.</span><span class="n">EVT_BUTTON</span><span class="p">(</span><span class="n">bang_button</span><span class="p">,</span> <span class="n">bang_button</span><span class="o">.</span><span class="n">GetId</span><span class="p">(),</span>
<span class="bp">self</span><span class="o">.</span><span class="n">OnBang</span><span class="p">)</span>
<span class="c"># final setup ------------------</span>
<span class="n">sizer</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">panel</span><span class="o">.</span><span class="n">GetSizer</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">frame</span><span class="o">.</span><span class="n">Show</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">SetTopWindow</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">frame</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">True</span>
<span class="k">def</span> <span class="nf">OnBang</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="n">bang_count</span> <span class="o">=</span> <span class="n">xrc</span><span class="o">.</span><span class="n">XRCCTRL</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">frame</span><span class="p">,</span><span class="s">"bang_count"</span><span class="p">)</span>
<span class="n">bangs</span> <span class="o">=</span> <span class="n">bang_count</span><span class="o">.</span><span class="n">GetValue</span><span class="p">()</span>
<span class="n">bangs</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">bangs</span><span class="p">)</span><span class="o">+</span><span class="mi">1</span>
<span class="n">bang_count</span><span class="o">.</span><span class="n">SetValue</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">bangs</span><span class="p">))</span>
<span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">'__main__'</span><span class="p">:</span>
<span class="n">app</span> <span class="o">=</span> <span class="n">MyApp</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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