title: How to set cell border and background color in QTableWidgetItem?
body: <p>I have a <code>QTableWidget</code> with 3 columns. 2 of the columns have some text in them, but one of them is empty and I want it to have a background color. Also I want the cells to have borders.</p>
  
  <p>If I do </p>
  
  <pre><code>int i = 0;
  foreach (tableData el, data) {
      //setting the first cell
  
      ui-&gt;eventTable-&gt;setItem(i, 1, new QTableWidgetItem); 
      //ui-&gt;eventTable-&gt;item(i, 1)-&gt;setBackground(el.severityColor);
      //ui-&gt;eventTable-&gt;item(i, 1)-&gt;setBackgroundColor(el.severityColor);
      ui-&gt;eventTable-&gt;item(i, 1)-&gt;setData(
          Qt::BackgroundRole,
          QBrush(el.severityColor)
      );
  
      //setting the third cell
  
      ++i;
  
  }
  </code></pre>
  
  <p>everything works as expected.</p>
  
  <p>But if before this code I try to add a border with </p>
  
  <pre><code>QString style(
      "QTableWidget::item {"
          "border: 1px solid white;"
      "}"
  );
  ui-&gt;eventTable-&gt;setStyleSheet(style);
  </code></pre>
  
  <p>the background is not set.</p>
  
  <p>I tried with <code>setBackground()</code>, <code>setBackgroundColor()</code> (even though it is deprecated) and <code>setData()</code> as seen in the code, but the result is the same.</p>
  
  <p>Also I tried <code>setShowGrid(true)</code> insted of the above stylesheet, but the border didn't show.</p>
  
  <p>You can reproduce this by creating a table with 1 row and 1 column and trying to set the background of the cell, and then adding the stylesheet for a border.</p>
  
  <p><strong>Am I missing something? What else should I try?</strong>
  <strong>As an alternative, can I target specific rows/cells in the styles, so I can build a stylesheet string that does what I want?</strong></p>
  
  <p><strong>Edit:</strong>
  I can have another styles in <code>QTableWidget::item</code> and they are applied, the problem is when I have a border.
  I also tried to write the border style as:</p>
  
  <pre><code>border-width: 1px;
  border-style: solid;
  border-color: white;
  </code></pre>
  
  <p>but still no luck.
  Also if I set the background from styles, it works. It doesn't work if I set it in code.</p>