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Reporting progress (object-oriented API)"><meta property="og:image" content="/logo.png"><!-- mathjax --><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script><!--[if lt IE 9]>
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<span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="">1.11.1</span>
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<h1>Reporting progress (object-oriented API)</h1>
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<small class="dont-index">Source: <a href="https://github.com/rstudio/shiny/blob/main/R/progress.R" class="external-link"><code>R/progress.R</code></a></small>
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<div class="hidden name"><code>Progress.Rd</code></div>
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</div>
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<div class="ref-description">
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<p>Reporting progress (object-oriented API)</p>
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<p>Reporting progress (object-oriented API)</p>
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</div>
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<div id="details">
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<h2>Details</h2>
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<p>Reports progress to the user during long-running operations.</p>
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<p>This package exposes two distinct programming APIs for working with
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progress. <code><a href="withProgress.html">withProgress()</a></code> and <code><a href="withProgress.html">setProgress()</a></code>
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together provide a simple function-based interface, while the
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<code>Progress</code> reference class provides an object-oriented API.</p>
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<p>Instantiating a <code>Progress</code> object causes a progress panel to be
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created, and it will be displayed the first time the <code>set</code>
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method is called. Calling <code>close</code> will cause the progress panel
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to be removed.</p>
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<p>As of version 0.14, the progress indicators use Shiny's new notification API.
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If you want to use the old styling (for example, you may have used customized
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CSS), you can use <code>style="old"</code> each time you call
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<code>Progress$new()</code>. If you don't want to set the style each time
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<code>Progress$new</code> is called, you can instead call
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<code><a href="shinyOptions.html">shinyOptions(progress.style="old")</a></code> just once, inside the server
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function.</p>
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</div>
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<div id="see-also">
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<h2>See also</h2>
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<div class="dont-index"><p><code><a href="withProgress.html">withProgress()</a></code></p></div>
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</div>
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<div id="methods">
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<h2>Methods</h2>
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<div class="section">
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<h3 id="public-methods">Public methods<a class="anchor" aria-label="anchor" href="#public-methods"></a></h3>
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<ul><li><p><a href="#method-Progress-new"><code>Progress$new()</code></a></p></li>
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<li><p><a href="#method-Progress-set"><code>Progress$set()</code></a></p></li>
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<li><p><a href="#method-Progress-inc"><code>Progress$inc()</code></a></p></li>
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<li><p><a href="#method-Progress-getMin"><code>Progress$getMin()</code></a></p></li>
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<li><p><a href="#method-Progress-getMax"><code>Progress$getMax()</code></a></p></li>
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<li><p><a href="#method-Progress-getValue"><code>Progress$getValue()</code></a></p></li>
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<li><p><a href="#method-Progress-close"><code>Progress$close()</code></a></p></li>
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<li><p><a href="#method-Progress-clone"><code>Progress$clone()</code></a></p></li>
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</ul></div><p></p><hr><a id="method-Progress-new"></a><div class="section">
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<h3 id="method-new-">Method <code><a href="https://rdrr.io/r/methods/new.html" class="external-link">new()</a></code><a class="anchor" aria-label="anchor" href="#method-new-"></a></h3>
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<p>Creates a new progress panel (but does not display it).</p><div class="section">
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<h4 id="usage">Usage<a class="anchor" aria-label="anchor" href="#usage"></a></h4>
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<p></p><div class="r"><div class="sourceCode"><pre><code><span><span class="va"><a href="../reference/Progress.html">Progress</a></span><span class="op">$</span><span class="fu">new</span><span class="op">(</span></span>
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<span> session <span class="op">=</span> <span class="fu"><a href="../reference/domains.html">getDefaultReactiveDomain</a></span><span class="op">(</span><span class="op">)</span>,</span>
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<span> min <span class="op">=</span> <span class="fl">0</span>,</span>
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<span> max <span class="op">=</span> <span class="fl">1</span>,</span>
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<span> style <span class="op">=</span> <span class="fu"><a href="../reference/shinyOptions.html">getShinyOption</a></span><span class="op">(</span><span class="st">"progress.style"</span>, default <span class="op">=</span> <span class="st">"notification"</span><span class="op">)</span></span>
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<span><span class="op">)</span></span></code></pre></div><p></p></div>
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</div>
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<div class="section">
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<h4 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h4>
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<p></p><div class="arguments"><dl><dt><code>session</code></dt>
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<dd><p>The Shiny session object, as provided by <code>shinyServer</code> to
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the server function.</p></dd>
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<dt><code>min</code></dt>
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<dd><p>The value that represents the starting point of the progress
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bar. Must be less than <code>max</code>.</p></dd>
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<dt><code>max</code></dt>
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<dd><p>The value that represents the end of the progress bar. Must be
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greater than <code>min</code>.</p></dd>
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<dt><code>style</code></dt>
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<dd><p>Progress display style. If <code>"notification"</code> (the default),
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the progress indicator will show using Shiny's notification API. If
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<code>"old"</code>, use the same HTML and CSS used in Shiny 0.13.2 and below (this
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is for backward-compatibility).</p></dd>
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</dl><p></p></div>
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</div>
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</div><p></p><hr><a id="method-Progress-set"></a><div class="section">
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<h3 id="method-set-">Method <code>set()</code><a class="anchor" aria-label="anchor" href="#method-set-"></a></h3>
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<p>Updates the progress panel. When called the first time, the
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progress panel is displayed.</p><div class="section">
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<h4 id="usage-1">Usage<a class="anchor" aria-label="anchor" href="#usage-1"></a></h4>
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<p></p><div class="r"><div class="sourceCode"><pre><code><span><span class="va">Progress</span><span class="op">$</span><span class="fu">set</span><span class="op">(</span>value <span class="op">=</span> <span class="cn">NULL</span>, message <span class="op">=</span> <span class="cn">NULL</span>, detail <span class="op">=</span> <span class="cn">NULL</span><span class="op">)</span></span></code></pre></div><p></p></div>
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</div>
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<div class="section">
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<h4 id="arguments-1">Arguments<a class="anchor" aria-label="anchor" href="#arguments-1"></a></h4>
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<p></p><div class="arguments"><dl><dt><code>value</code></dt>
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<dd><p>Single-element numeric vector; the value at which to set the
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progress bar, relative to <code>min</code> and <code>max</code>. <code>NULL</code> hides the progress
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bar, if it is currently visible.</p></dd>
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<dt><code>message</code></dt>
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<dd><p>A single-element character vector; the message to be
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displayed to the user, or <code>NULL</code> to hide the current message (if any).</p></dd>
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<dt><code>detail</code></dt>
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<dd><p>A single-element character vector; the detail message to be
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displayed to the user, or <code>NULL</code> to hide the current detail message (if
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any). The detail message will be shown with a de-emphasized appearance
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relative to <code>message</code>.</p></dd>
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</dl><p></p></div>
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</div>
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</div><p></p><hr><a id="method-Progress-inc"></a><div class="section">
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<h3 id="method-inc-">Method <code>inc()</code><a class="anchor" aria-label="anchor" href="#method-inc-"></a></h3>
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<p>Like <code>set</code>, this updates the progress panel. The difference
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is that <code>inc</code> increases the progress bar by <code>amount</code>, instead of
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setting it to a specific value.</p><div class="section">
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<h4 id="usage-2">Usage<a class="anchor" aria-label="anchor" href="#usage-2"></a></h4>
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<p></p><div class="r"><div class="sourceCode"><pre><code><span><span class="va">Progress</span><span class="op">$</span><span class="fu">inc</span><span class="op">(</span>amount <span class="op">=</span> <span class="fl">0.1</span>, message <span class="op">=</span> <span class="cn">NULL</span>, detail <span class="op">=</span> <span class="cn">NULL</span><span class="op">)</span></span></code></pre></div><p></p></div>
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</div>
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<div class="section">
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<h4 id="arguments-2">Arguments<a class="anchor" aria-label="anchor" href="#arguments-2"></a></h4>
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<p></p><div class="arguments"><dl><dt><code>amount</code></dt>
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<dd><p>For the <code>inc()</code> method, a numeric value to increment the
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progress bar.</p></dd>
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<dt><code>message</code></dt>
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<dd><p>A single-element character vector; the message to be
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displayed to the user, or <code>NULL</code> to hide the current message (if any).</p></dd>
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<dt><code>detail</code></dt>
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<dd><p>A single-element character vector; the detail message to be
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displayed to the user, or <code>NULL</code> to hide the current detail message (if
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any). The detail message will be shown with a de-emphasized appearance
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relative to <code>message</code>.</p></dd>
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</dl><p></p></div>
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</div>
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</div><p></p><hr><a id="method-Progress-getMin"></a><div class="section">
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<h3 id="method-getmin-">Method <code>getMin()</code><a class="anchor" aria-label="anchor" href="#method-getmin-"></a></h3>
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<p>Returns the minimum value.</p><div class="section">
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<h4 id="usage-3">Usage<a class="anchor" aria-label="anchor" href="#usage-3"></a></h4>
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<p></p><div class="r"><div class="sourceCode"><pre><code><span><span class="va">Progress</span><span class="op">$</span><span class="fu">getMin</span><span class="op">(</span><span class="op">)</span></span></code></pre></div><p></p></div>
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</div>
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</div><p></p><hr><a id="method-Progress-getMax"></a><div class="section">
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<h3 id="method-getmax-">Method <code>getMax()</code><a class="anchor" aria-label="anchor" href="#method-getmax-"></a></h3>
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<p>Returns the maximum value.</p><div class="section">
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<h4 id="usage-4">Usage<a class="anchor" aria-label="anchor" href="#usage-4"></a></h4>
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<p></p><div class="r"><div class="sourceCode"><pre><code><span><span class="va">Progress</span><span class="op">$</span><span class="fu">getMax</span><span class="op">(</span><span class="op">)</span></span></code></pre></div><p></p></div>
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</div>
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</div><p></p><hr><a id="method-Progress-getValue"></a><div class="section">
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<h3 id="method-getvalue-">Method <code>getValue()</code><a class="anchor" aria-label="anchor" href="#method-getvalue-"></a></h3>
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<p>Returns the current value.</p><div class="section">
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<h4 id="usage-5">Usage<a class="anchor" aria-label="anchor" href="#usage-5"></a></h4>
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<p></p><div class="r"><div class="sourceCode"><pre><code><span><span class="va">Progress</span><span class="op">$</span><span class="fu">getValue</span><span class="op">(</span><span class="op">)</span></span></code></pre></div><p></p></div>
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</div>
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</div><p></p><hr><a id="method-Progress-close"></a><div class="section">
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<h3 id="method-close-">Method <code><a href="https://rdrr.io/r/base/connections.html" class="external-link">close()</a></code><a class="anchor" aria-label="anchor" href="#method-close-"></a></h3>
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<p>Removes the progress panel. Future calls to <code>set</code> and
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<code>close</code> will be ignored.</p><div class="section">
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<h4 id="usage-6">Usage<a class="anchor" aria-label="anchor" href="#usage-6"></a></h4>
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<p></p><div class="r"><div class="sourceCode"><pre><code><span><span class="va">Progress</span><span class="op">$</span><span class="fu">close</span><span class="op">(</span><span class="op">)</span></span></code></pre></div><p></p></div>
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</div>
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</div><p></p><hr><a id="method-Progress-clone"></a><div class="section">
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<h3 id="method-clone-">Method <code>clone()</code><a class="anchor" aria-label="anchor" href="#method-clone-"></a></h3>
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<p>The objects of this class are cloneable with this method.</p><div class="section">
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<h4 id="usage-7">Usage<a class="anchor" aria-label="anchor" href="#usage-7"></a></h4>
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<p></p><div class="r"><div class="sourceCode"><pre><code><span><span class="va">Progress</span><span class="op">$</span><span class="fu">clone</span><span class="op">(</span>deep <span class="op">=</span> <span class="cn">FALSE</span><span class="op">)</span></span></code></pre></div><p></p></div>
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</div>
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<div class="section">
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<h4 id="arguments-3">Arguments<a class="anchor" aria-label="anchor" href="#arguments-3"></a></h4>
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<p></p><div class="arguments"><dl><dt><code>deep</code></dt>
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<dd><p>Whether to make a deep clone.</p></dd>
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</dl><p></p></div>
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</div>
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</div>
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</div>
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<div id="ref-examples">
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<h2>Examples</h2>
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<div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="co">## Only run examples in interactive R sessions</span></span></span>
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<span class="r-in"><span><span class="kw">if</span> <span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/interactive.html" class="external-link">interactive</a></span><span class="op">(</span><span class="op">)</span><span class="op">)</span> <span class="op">{</span></span></span>
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<span class="r-in"><span></span></span>
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<span class="r-in"><span><span class="va">ui</span> <span class="op"><-</span> <span class="fu"><a href="fluidPage.html">fluidPage</a></span><span class="op">(</span></span></span>
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<span class="r-in"><span> <span class="fu"><a href="plotOutput.html">plotOutput</a></span><span class="op">(</span><span class="st">"plot"</span><span class="op">)</span></span></span>
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<span class="r-in"><span><span class="op">)</span></span></span>
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<span class="r-in"><span></span></span>
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<span class="r-in"><span><span class="va">server</span> <span class="op"><-</span> <span class="kw">function</span><span class="op">(</span><span class="va">input</span>, <span class="va">output</span>, <span class="va">session</span><span class="op">)</span> <span class="op">{</span></span></span>
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<span class="r-in"><span> <span class="va">output</span><span class="op">$</span><span class="va">plot</span> <span class="op"><-</span> <span class="fu"><a href="renderPlot.html">renderPlot</a></span><span class="op">(</span><span class="op">{</span></span></span>
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<span class="r-in"><span> <span class="va">progress</span> <span class="op"><-</span> <span class="va">Progress</span><span class="op">$</span><span class="fu">new</span><span class="op">(</span><span class="va">session</span>, min<span class="op">=</span><span class="fl">1</span>, max<span class="op">=</span><span class="fl">15</span><span class="op">)</span></span></span>
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<span class="r-in"><span> <span class="fu"><a href="https://rdrr.io/r/base/on.exit.html" class="external-link">on.exit</a></span><span class="op">(</span><span class="va">progress</span><span class="op">$</span><span class="fu">close</span><span class="op">(</span><span class="op">)</span><span class="op">)</span></span></span>
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<span class="r-in"><span></span></span>
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<span class="r-in"><span> <span class="va">progress</span><span class="op">$</span><span class="fu">set</span><span class="op">(</span>message <span class="op">=</span> <span class="st">'Calculation in progress'</span>,</span></span>
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<span class="r-in"><span> detail <span class="op">=</span> <span class="st">'This may take a while...'</span><span class="op">)</span></span></span>
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<span class="r-in"><span></span></span>
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<span class="r-in"><span> <span class="kw">for</span> <span class="op">(</span><span class="va">i</span> <span class="kw">in</span> <span class="fl">1</span><span class="op">:</span><span class="fl">15</span><span class="op">)</span> <span class="op">{</span></span></span>
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<span class="r-in"><span> <span class="va">progress</span><span class="op">$</span><span class="fu">set</span><span class="op">(</span>value <span class="op">=</span> <span class="va">i</span><span class="op">)</span></span></span>
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<span class="r-in"><span> <span class="fu"><a href="https://rdrr.io/r/base/Sys.sleep.html" class="external-link">Sys.sleep</a></span><span class="op">(</span><span class="fl">0.5</span><span class="op">)</span></span></span>
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<span class="r-in"><span> <span class="op">}</span></span></span>
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<span class="r-in"><span> <span class="fu"><a href="https://rdrr.io/r/graphics/plot.default.html" class="external-link">plot</a></span><span class="op">(</span><span class="va">cars</span><span class="op">)</span></span></span>
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<span class="r-in"><span> <span class="op">}</span><span class="op">)</span></span></span>
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<span class="r-in"><span><span class="op">}</span></span></span>
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<span class="r-in"><span></span></span>
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<span class="r-in"><span><span class="fu"><a href="shinyApp.html">shinyApp</a></span><span class="op">(</span><span class="va">ui</span>, <span class="va">server</span><span class="op">)</span></span></span>
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<span class="r-in"><span><span class="op">}</span></span></span>
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</code></pre></div>
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</div>
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</div>
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<div class="col-md-3 hidden-xs hidden-sm" id="pkgdown-sidebar">
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<nav id="toc" data-toggle="toc" class="sticky-top"><h2 data-toc-skip>Contents</h2>
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</nav></div>
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<footer><div class="copyright">
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<p></p><p>Developed by Winston Chang, Joe Cheng, JJ Allaire, Carson Sievert, Barret Schloerke, Yihui Xie, Jeff Allen, Jonathan McPherson, Alan Dipert, Barbara Borges, Posit Software, PBC.</p>
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</div>
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<div class="pkgdown">
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<p></p><p>Site built with <a href="https://pkgdown.r-lib.org/" class="external-link">pkgdown</a> 2.1.3.</p>
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