title: How can I get the screen width and height using appJar?
body: <p>Is there a way to use <code>appJar</code> itself to get the screen height and width.</p>
  
  <p>Alternativley since <code>appJar</code> is a wrapper for <code>tkinter</code> is there a way for me to create a <code>Tk()</code> instance to utilise the below code I have seen used everywhere whilst research:</p>
  
  <pre><code>import tkinter
  
  root = tkinter.Tk()
  width = root.winfo_screenwidth()
  height = root.winfo_screenheight()
  </code></pre>
  
  <p>I would like to do this so I can use these sizes for setting window sizes later with the <code>.setGeometry()</code> method, e.g.</p>
  
  <pre><code># Fullscreen
  app.setGeometry(width, height)
  </code></pre>
  
  <p>or:</p>
  
  <pre><code># Horizontal halfscreen
  app.setGeometry(int(width / 2), height)
  </code></pre>
  
  <p>or: </p>
  
  <pre><code># Vertical halfscren
  app.setGeometry(width, int(height / 2))
  </code></pre>