I have defined a QLineEdit in the "BaseForm" constructor as
Qt Code: 
  1. boxLayout = new QVBoxLayout ( frameD );
  2. 			inputStripLayout = new QHBoxLayout ( );
  3. 			boxLayout->addLayout ( inputStripLayout );
  4.  
  5. 			lbCategory = new QLabel("Category #");
  6. 			lbCategory->setFont ( fb );
  7. 			inputStripLayout->addWidget ( lbCategory );
  8.  
  9. 			leCategoryNumber= new QLineEdit();
  10. 			leCategoryNumber->setAlignment ( Qt::AlignCenter );
  11. 			leCategoryNumber->setPalette ( palE );
  12. 			leCategoryNumber->setFont ( fb );
  13. 			leCategoryNumber->setMaximumWidth(30);
  14. 			leCategoryNumber->setEnabled(false);
  15.  
  16. 			inputStripLayout->addWidget ( leCategoryNumber)
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and I want to change the color of the QLineEdit and set the focus with
Qt Code: 
  1. void BaseForm::slotPb1() 
  2. {
  3. 	catNum->inputCatNum();
  4. 	Pb1->setText("-");
  5. 	Pb2->setText("Cat'ory");
  6. 	leCategoryNumber->setPalette ( QColor (17, 255, 255) );
  7. 	leCategoryNumber->setEnabled(true);
  8. 	leCategoryNumber->setFocus();
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I get the "focus" ok, but I get a "white" box, not the "blue" one I want. Looked at the QPalette" documentation and don't understand a word of it. I am sure there is a simple way to togle colors on a QLineEdit" as a signal for "User" input. But I couldn't find it .
Thanks in advance for you help.