title: How to expand widget boundaries in QTabWidget
body: <p><img src="https://i.stack.imgur.com/hMN8Q.png" alt="enter image description here"></p>
  
  <p>I would like to eliminate the border from a QTabWidget as shown in the diagram. The bottom half of the tab labels should occlude the widgets where they intersect. Is this possible? Code follows:</p>
  
  <pre><code>#include "mainwindow.h"
  #include "ui_mainwindow.h"
  
  #include "QGraphicsScene"
  #include "QTableWidget"
  #include "QGraphicsView"
  #include "QTextEdit"
  
  MainWindow::MainWindow(QWidget *parent) :
      QMainWindow(parent),
      ui(new Ui::MainWindow)
  {
      ui-&gt;setupUi(this);
  
      QGraphicsView* left = new QGraphicsView(new QGraphicsScene);
      QTextEdit* right = new QTextEdit;
  
      QTabWidget* tab = new QTabWidget(this);
      tab-&gt;insertTab(0, left, "Left");
      tab-&gt;insertTab(1, right, "Right");
  
      setCentralWidget(tab);
  }
  
  MainWindow::~MainWindow()
  {
      delete ui;
  }
  </code></pre>