title: read multiple values from qtextedit and take them as distinct numbers
body: <p>I want to read 4 values from my <code>QTextEdit</code>, and take them as 4 different values. For example, i insert <code>-0.69995284 0.69995284 0.14188747  0.56378639</code> and i want them as </p>
  
  <p><code>float Value1 = -0.69995284 
   float Value2 = 0.69995284 
   float Value3 = 0.14188747
   float Value4 = 0.56378639</code></p>
  
  <p>I begin with this:</p>
  
  <p><code>QString textEditValue = ui-&gt;myTextEdit-&gt;toPlainText()
  QStringList lines = textEditValue .split(" ");</code></p>
  
  <p>but i don't know what i must do to obtain different values.</p>