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<div class="section" id="bitmaps">
<h1>Bitmaps<a class="headerlink" href="#bitmaps" title="Permalink to this headline">¶</a></h1>
<dl class="docutils">
<dt>For some widgets you need to specify one or more bitmaps. There are several options how to do this:</dt>
<dd><ul class="first last simple">
<li>from a bitmap file</li>
<li>from a named variable: statement <span class="guilabel">var:</span></li>
<li>empty bitmap: statement <span class="guilabel">empty:</span></li>
<li>from wxArtProvider: statement <span class="guilabel">art:</span></li>
<li>from literal code: statement <span class="guilabel">code:</span></li>
</ul>
</dd>
</dl>
<div class="section" id="from-bitmap-file-path">
<h2>From Bitmap File / Path<a class="headerlink" href="#from-bitmap-file-path" title="Permalink to this headline">¶</a></h2>
<p>Specify the absolute or relative path to the bitmap file.</p>
<p>For an absolute path, you may use the file dialog by clicking the button “…”.</p>
<p>You may drag a file to the field. If the file is located below the project file’s directory, the relative path will be entered. For the absolute path just hold the <code class="kbd docutils literal"><span class="pre">Alt</span></code> or <code class="kbd docutils literal"><span class="pre">Ctrl</span></code> key.</p>
<p>Sometimes, depending on your runtime environment, you may have to customize the loading of the bitmap files.
See below for an example.</p>
<table border="1" class="colwidths-given docutils">
<colgroup>
<col width="20%" />
<col width="80%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><strong>Example</strong></td>
<td><div class="first highlight-default"><div class="highlight"><pre><span></span><span class="o">/</span><span class="n">usr</span><span class="o">/</span><span class="n">share</span><span class="o">/</span><span class="n">icons</span><span class="o">/</span><span class="n">application</span><span class="o">.</span><span class="n">png</span>
</pre></div>
</div>
<p class="last"><img alt="BitmapPath" src="_images/BitmapPath.png" /></p>
</td>
</tr>
<tr class="row-even"><td><strong>Created code</strong> <br/>
C++</td>
<td><div class="first last highlight-default"><div class="highlight"><pre><span></span><span class="n">wxBitmap</span><span class="p">(</span><span class="s2">"/usr/share/icons/application.png"</span><span class="p">,</span> <span class="n">wxBITMAP_TYPE_ANY</span><span class="p">)</span>
</pre></div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="from-named-variable-statement-var">
<h2>From named variable: Statement <strong>var</strong><a class="headerlink" href="#from-named-variable-statement-var" title="Permalink to this headline">¶</a></h2>
<table border="1" class="colwidths-given docutils">
<colgroup>
<col width="20%" />
<col width="80%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><strong>Syntax</strong></td>
<td><div class="first last highlight-default"><div class="highlight"><pre><span></span><span class="n">var</span><span class="p">:</span><span class="o"><</span><span class="n">variable</span> <span class="n">name</span><span class="o">></span>
</pre></div>
</div>
</td>
</tr>
<tr class="row-even"><td><strong>Example</strong></td>
<td><div class="first last highlight-default"><div class="highlight"><pre><span></span><span class="n">var</span><span class="p">:</span><span class="n">my_bitmap_path</span>
</pre></div>
</div>
</td>
</tr>
<tr class="row-odd"><td><strong>Created code</strong> <br/>
C++</td>
<td><div class="first last highlight-default"><div class="highlight"><pre><span></span><span class="n">wxBitmap</span><span class="p">(</span><span class="n">my_bitmap_path</span><span class="p">,</span> <span class="n">wxBITMAP_TYPE_ANY</span><span class="p">)</span>
</pre></div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="empty-bitmap-statement-empty">
<h2>Empty Bitmap: Statement <strong>empty</strong><a class="headerlink" href="#empty-bitmap-statement-empty" title="Permalink to this headline">¶</a></h2>
<p>Creates an empty bitmap of the specified size (min. 1,1)</p>
<table border="1" class="colwidths-given docutils">
<colgroup>
<col width="20%" />
<col width="80%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><strong>Syntax</strong></td>
<td><div class="first last highlight-default"><div class="highlight"><pre><span></span><span class="n">empty</span><span class="p">:</span><span class="o"><</span><span class="n">width</span><span class="o">></span><span class="p">,</span><span class="o"><</span><span class="n">height</span><span class="o">></span>
</pre></div>
</div>
</td>
</tr>
<tr class="row-even"><td><strong>Example</strong></td>
<td><div class="first last highlight-default"><div class="highlight"><pre><span></span><span class="n">empty</span><span class="p">:</span><span class="mi">32</span><span class="p">,</span><span class="mi">32</span>
</pre></div>
</div>
</td>
</tr>
<tr class="row-odd"><td><strong>Created code</strong> <br/>
C++</td>
<td><div class="first last highlight-default"><div class="highlight"><pre><span></span><span class="n">wx</span><span class="o">.</span><span class="n">EmptyBitmap</span><span class="p">(</span><span class="mi">32</span><span class="p">,</span> <span class="mi">32</span><span class="p">)</span>
</pre></div>
</div>
</td>
</tr>
<tr class="row-even"><td><br/> Python</td>
<td><div class="first last highlight-default"><div class="highlight"><pre><span></span><span class="n">wxBitmap</span><span class="p">(</span><span class="mi">32</span><span class="p">,</span> <span class="mi">32</span><span class="p">)</span>
</pre></div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="from-wxartprovider-statement-art">
<h2>From wxArtProvider: Statement <strong>art</strong><a class="headerlink" href="#from-wxartprovider-statement-art" title="Permalink to this headline">¶</a></h2>
<p>Create a bitmap using wxArtProvider.</p>
<p>See <a class="reference external" href="https://docs.wxpython.org/wx.ArtProvider.html">https://docs.wxpython.org/wx.ArtProvider.html</a> for usage of wxArtProvider.</p>
<table border="1" class="colwidths-given docutils">
<colgroup>
<col width="20%" />
<col width="80%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><strong>Syntax</strong></td>
<td><div class="first highlight-default"><div class="highlight"><pre><span></span><span class="n">art</span><span class="p">:</span><span class="o"><</span><span class="n">ArtID</span><span class="o">></span><span class="p">,</span><span class="o"><</span><span class="n">ArtClient</span><span class="o">></span>
</pre></div>
</div>
<p>or:</p>
<div class="last highlight-default"><div class="highlight"><pre><span></span><span class="n">art</span><span class="p">:</span><span class="o"><</span><span class="n">ArtID</span><span class="o">></span><span class="p">,</span><span class="o"><</span><span class="n">ArtClient</span><span class="o">></span><span class="p">,</span><span class="o"><</span><span class="n">width</span><span class="o">></span><span class="p">,</span><span class="o"><</span><span class="n">height</span><span class="o">></span>
</pre></div>
</div>
</td>
</tr>
<tr class="row-even"><td><strong>Example</strong></td>
<td><div class="first last highlight-default"><div class="highlight"><pre><span></span><span class="n">art</span><span class="p">:</span><span class="n">wxART_GO_UP</span><span class="p">,</span><span class="n">wxART_OTHER</span><span class="p">,</span><span class="mi">32</span><span class="p">,</span><span class="mi">32</span>
</pre></div>
</div>
</td>
</tr>
<tr class="row-odd"><td><strong>Created code</strong> <br/>
Perl</td>
<td><div class="first last highlight-default"><div class="highlight"><pre><span></span><span class="n">Wx</span><span class="p">::</span><span class="n">ArtProvider</span><span class="p">::</span><span class="n">GetBitmap</span><span class="p">(</span><span class="n">wxART_GO_UP</span><span class="p">,</span> <span class="n">wxART_OTHER</span><span class="p">,</span> <span class="n">Wx</span><span class="p">::</span><span class="n">Size</span><span class="o">-></span><span class="n">new</span><span class="p">(</span><span class="mi">32</span><span class="p">,</span> <span class="mi">32</span><span class="p">))</span>
</pre></div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="from-code-statement-code">
<h2>From Code: Statement <strong>code</strong><a class="headerlink" href="#from-code-statement-code" title="Permalink to this headline">¶</a></h2>
<p>This just inserts the given code.</p>
<table border="1" class="colwidths-given docutils">
<colgroup>
<col width="20%" />
<col width="80%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><strong>Syntax</strong></td>
<td><div class="first last highlight-default"><div class="highlight"><pre><span></span><span class="n">code</span><span class="p">:</span><span class="o"><</span><span class="n">code</span> <span class="n">chunk</span> <span class="n">to</span> <span class="k">return</span> <span class="n">a</span> <span class="n">wxBitmap</span><span class="o">></span>
</pre></div>
</div>
</td>
</tr>
<tr class="row-even"><td><strong>Example</strong></td>
<td><div class="first last highlight-default"><div class="highlight"><pre><span></span><span class="n">code</span><span class="p">:</span><span class="k">if</span> <span class="p">(</span><span class="n">x</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="n">get_bitmap1</span><span class="p">()</span> <span class="k">else</span> <span class="n">get_bitmap2</span><span class="p">();</span>
</pre></div>
</div>
</td>
</tr>
<tr class="row-odd"><td><strong>Created code</strong> <br/>
C++</td>
<td><div class="first last highlight-default"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">(</span><span class="n">x</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="n">get_bitmap1</span><span class="p">()</span> <span class="k">else</span> <span class="n">get_bitmap2</span><span class="p">();</span>
</pre></div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="customizing-bitmap-loading">
<h2>Customizing Bitmap loading<a class="headerlink" href="#customizing-bitmap-loading" title="Permalink to this headline">¶</a></h2>
<p>If at runtime the image files are at a non-standard location, you need to customize the loading of image files such
that the files will be found.</p>
<p>For example, if you use PyInstaller to create a single-file executable, then the bitmaps need to be loaded from a temporary directory <code class="code docutils literal"><span class="pre">sys._MEIPASS</span></code>.</p>
<p>This example code would replace <code class="code docutils literal"><span class="pre">wx.Bitmap</span></code> with an implementation that is aware of this remapping:</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">wx</span>
<span class="kn">import</span> <span class="nn">sys</span><span class="o">,</span> <span class="nn">os</span>
<span class="c1"># taken from stackoverflow re accessing data files within pyinstaller bundle.</span>
<span class="k">def</span> <span class="nf">resource_path</span><span class="p">(</span><span class="n">relative_path</span><span class="p">):</span>
<span class="s2">"Get absolute path to resource, works for dev and for PyInstaller."</span>
<span class="n">base_path</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">sys</span><span class="p">,</span> <span class="s1">'_MEIPASS'</span><span class="p">,</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">dirname</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">abspath</span><span class="p">(</span><span class="vm">__file__</span><span class="p">)))</span>
<span class="k">return</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">base_path</span><span class="p">,</span> <span class="n">relative_path</span><span class="p">)</span>
<span class="c1"># get a reference to original wx.Bitmap (just in case)</span>
<span class="n">wxBitmap</span> <span class="o">=</span> <span class="n">wx</span><span class="o">.</span><span class="n">Bitmap</span>
<span class="c1"># customised wx.Bitmap, which obtains the location of the bitmap</span>
<span class="c1"># using the `resource_path` function above.</span>
<span class="k">class</span> <span class="nc">MyBitmap</span><span class="p">(</span><span class="n">wxBitmap</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="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">kwargs</span><span class="p">[</span><span class="s1">'name'</span><span class="p">]</span> <span class="o">=</span> <span class="n">resource_path</span><span class="p">(</span><span class="n">kwargs</span><span class="p">[</span><span class="s1">'name'</span><span class="p">])</span>
<span class="k">except</span> <span class="ne">KeyError</span><span class="p">:</span>
<span class="n">args</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">args</span><span class="p">)</span>
<span class="n">args</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="n">resource_path</span><span class="p">(</span><span class="n">args</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="c1"># call original wx.Bitmap</span>
<span class="n">wxBitmap</span><span class="o">.</span><span class="fm">__init__</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">kwargs</span><span class="p">)</span>
<span class="c1"># Remap wx.Bitmap to our customised version.</span>
<span class="n">wx</span><span class="o">.</span><span class="n">Bitmap</span> <span class="o">=</span> <span class="n">MyBitmap</span>
</pre></div>
</div>
<p>(Courtesy of Brendan Simon)</p>
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<h3><a href="index.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">Bitmaps</a><ul>
<li><a class="reference internal" href="#from-bitmap-file-path">From Bitmap File / Path</a></li>
<li><a class="reference internal" href="#from-named-variable-statement-var">From named variable: Statement <strong>var</strong></a></li>
<li><a class="reference internal" href="#empty-bitmap-statement-empty">Empty Bitmap: Statement <strong>empty</strong></a></li>
<li><a class="reference internal" href="#from-wxartprovider-statement-art">From wxArtProvider: Statement <strong>art</strong></a></li>
<li><a class="reference internal" href="#from-code-statement-code">From Code: Statement <strong>code</strong></a></li>
<li><a class="reference internal" href="#customizing-bitmap-loading">Customizing Bitmap loading</a></li>
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