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<h1>Source code for pyqtgraph.graphicsItems.FillBetweenItem</h1><div class="highlight"><pre>
<span class="kn">from</span> <span class="nn">..Qt</span> <span class="kn">import</span> <span class="n">QtGui</span>
<span class="kn">from</span> <span class="nn">..</span> <span class="kn">import</span> <span class="n">functions</span> <span class="k">as</span> <span class="n">fn</span>
<span class="kn">from</span> <span class="nn">.PlotDataItem</span> <span class="kn">import</span> <span class="n">PlotDataItem</span>
<span class="kn">from</span> <span class="nn">.PlotCurveItem</span> <span class="kn">import</span> <span class="n">PlotCurveItem</span>
<div class="viewcode-block" id="FillBetweenItem"><a class="viewcode-back" href="../../../graphicsItems/fillbetweenitem.html#pyqtgraph.FillBetweenItem">[docs]</a><span class="k">class</span> <span class="nc">FillBetweenItem</span><span class="p">(</span><span class="n">QtGui</span><span class="o">.</span><span class="n">QGraphicsPathItem</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> GraphicsItem filling the space between two PlotDataItems.</span>
<span class="sd"> """</span>
<div class="viewcode-block" id="FillBetweenItem.__init__"><a class="viewcode-back" href="../../../graphicsItems/fillbetweenitem.html#pyqtgraph.FillBetweenItem.__init__">[docs]</a> <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">curve1</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">curve2</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">brush</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="n">QtGui</span><span class="o">.</span><span class="n">QGraphicsPathItem</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">self</span><span class="o">.</span><span class="n">curves</span> <span class="o">=</span> <span class="bp">None</span>
<span class="k">if</span> <span class="n">curve1</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> <span class="ow">and</span> <span class="n">curve2</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setCurves</span><span class="p">(</span><span class="n">curve1</span><span class="p">,</span> <span class="n">curve2</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">curve1</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> <span class="ow">or</span> <span class="n">curve2</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s">"Must specify two curves to fill between."</span><span class="p">)</span>
<span class="k">if</span> <span class="n">brush</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setBrush</span><span class="p">(</span><span class="n">fn</span><span class="o">.</span><span class="n">mkBrush</span><span class="p">(</span><span class="n">brush</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">updatePath</span><span class="p">()</span></div>
<div class="viewcode-block" id="FillBetweenItem.setCurves"><a class="viewcode-back" href="../../../graphicsItems/fillbetweenitem.html#pyqtgraph.FillBetweenItem.setCurves">[docs]</a> <span class="k">def</span> <span class="nf">setCurves</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">curve1</span><span class="p">,</span> <span class="n">curve2</span><span class="p">):</span>
<span class="sd">"""Set the curves to fill between.</span>
<span class="sd"> </span>
<span class="sd"> Arguments must be instances of PlotDataItem or PlotCurveItem.</span>
<span class="sd"> </span>
<span class="sd"> Added in version 0.9.9</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">curves</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span>
<span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">curves</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">c</span><span class="o">.</span><span class="n">sigPlotChanged</span><span class="o">.</span><span class="n">disconnect</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">curveChanged</span><span class="p">)</span>
<span class="k">except</span> <span class="p">(</span><span class="ne">TypeError</span><span class="p">,</span> <span class="ne">RuntimeError</span><span class="p">):</span>
<span class="k">pass</span>
<span class="n">curves</span> <span class="o">=</span> <span class="p">[</span><span class="n">curve1</span><span class="p">,</span> <span class="n">curve2</span><span class="p">]</span>
<span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">curves</span><span class="p">:</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">c</span><span class="p">,</span> <span class="n">PlotDataItem</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">c</span><span class="p">,</span> <span class="n">PlotCurveItem</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s">"Curves must be PlotDataItem or PlotCurveItem."</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">curves</span> <span class="o">=</span> <span class="n">curves</span>
<span class="n">curve1</span><span class="o">.</span><span class="n">sigPlotChanged</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">curveChanged</span><span class="p">)</span>
<span class="n">curve2</span><span class="o">.</span><span class="n">sigPlotChanged</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">curveChanged</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setZValue</span><span class="p">(</span><span class="nb">min</span><span class="p">(</span><span class="n">curve1</span><span class="o">.</span><span class="n">zValue</span><span class="p">(),</span> <span class="n">curve2</span><span class="o">.</span><span class="n">zValue</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">curveChanged</span><span class="p">()</span></div>
<div class="viewcode-block" id="FillBetweenItem.setBrush"><a class="viewcode-back" href="../../../graphicsItems/fillbetweenitem.html#pyqtgraph.FillBetweenItem.setBrush">[docs]</a> <span class="k">def</span> <span class="nf">setBrush</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwds</span><span class="p">):</span>
<span class="sd">"""Change the fill brush. Acceps the same arguments as pg.mkBrush()"""</span>
<span class="n">QtGui</span><span class="o">.</span><span class="n">QGraphicsPathItem</span><span class="o">.</span><span class="n">setBrush</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fn</span><span class="o">.</span><span class="n">mkBrush</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwds</span><span class="p">))</span></div>
<span class="k">def</span> <span class="nf">curveChanged</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">updatePath</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">updatePath</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">curves</span> <span class="ow">is</span> <span class="bp">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setPath</span><span class="p">(</span><span class="n">QtGui</span><span class="o">.</span><span class="n">QPainterPath</span><span class="p">())</span>
<span class="k">return</span>
<span class="n">paths</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">curves</span><span class="p">:</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">c</span><span class="p">,</span> <span class="n">PlotDataItem</span><span class="p">):</span>
<span class="n">paths</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">c</span><span class="o">.</span><span class="n">curve</span><span class="o">.</span><span class="n">getPath</span><span class="p">())</span>
<span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">c</span><span class="p">,</span> <span class="n">PlotCurveItem</span><span class="p">):</span>
<span class="n">paths</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">c</span><span class="o">.</span><span class="n">getPath</span><span class="p">())</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">QtGui</span><span class="o">.</span><span class="n">QPainterPath</span><span class="p">()</span>
<span class="n">p1</span> <span class="o">=</span> <span class="n">paths</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">toSubpathPolygons</span><span class="p">()</span>
<span class="n">p2</span> <span class="o">=</span> <span class="n">paths</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">toReversed</span><span class="p">()</span><span class="o">.</span><span class="n">toSubpathPolygons</span><span class="p">()</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">p1</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span> <span class="ow">or</span> <span class="nb">len</span><span class="p">(</span><span class="n">p2</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setPath</span><span class="p">(</span><span class="n">QtGui</span><span class="o">.</span><span class="n">QPainterPath</span><span class="p">())</span>
<span class="k">return</span>
<span class="n">path</span><span class="o">.</span><span class="n">addPolygon</span><span class="p">(</span><span class="n">p1</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">+</span> <span class="n">p2</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setPath</span><span class="p">(</span><span class="n">path</span><span class="p">)</span></div>
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