title: Set size for checkbox image in libgdx UI
body: <p>I can't figure out how to manage checkbox images size. Of course, it is possible to create different size of image in my Texture atlas and take appropriate one, but I don't want to do that.</p>
  
  <p>Here is my code:</p>
  
  <pre><code>AtlasRegion checkboxOn = AssetsHelper.textures.findRegion("checked");
  AtlasRegion checkboxOff = AssetsHelper.textures.findRegion("unchecked");
  CheckBoxStyle checkBoxStyle = new CheckBoxStyle();
  checkBoxStyle.font = AssetsHelper.font66yellow;
  checkBoxStyle.checkboxOff = checkboxOff;
  checkBoxStyle.checkboxOn = checkboxOn;
  CheckBox cbSound = new CheckBox(" Sound", checkBoxStyle);
  </code></pre>
  
  <p>cbSound object doesn't have such methods to rezise image of checkbox, but there is method getImage(), but seems it doesn't work too. 
  This is not working:</p>
  
  <pre><code>cbSound.getImage().width = 120;
  cbSound.getImage().height = 120;
  </code></pre>
  
  <p>FYI: for example, when I wanted to draw image I did like that:</p>
  
  <pre><code>batch.draw(textureRegion, 0, 0, widthIwant, heightIwant);
  </code></pre>
  
  <p>But in CheckBox class there is overrided only this (without setting width and height):</p>
  
  <pre><code>public void draw (SpriteBatch batch, float parentAlpha) {
      image.setRegion(isChecked ? style.checkboxOn : style.checkboxOff);
      super.draw(batch, parentAlpha);
  }
  </code></pre>
  
  <p><strong>Question</strong>: how can I change width and height of checkbox image?</p>
  
  <p>Thanks in advance.</p>