hi

i want that when horizontalSlider will change, widgets be Apparent or hidden .

Qt Code: 
  1. #include "addaward.h"
  2. #include "ui_addaward.h"
  3. #include "stringclass.h"
  4.  
  5. Addaward::Addaward(QWidget *parent) :
  6.     QDialog(parent),
  7.     ui(new Ui::Addaward)
  8. {
  9.     ui->setupUi(this);
  10.  
  11.     ui->label2->setHidden(true);
  12.     ui->lineEdit_2->setHidden(true);
  13. // "a" is a int type
  14.     a = ui->horizontalSlider->value();
  15.     setVisiblity();
  16. }
  17.  
  18. Addaward::~Addaward()
  19. {
  20.     delete ui;
  21. }
  22.  
  23. void Addaward::setVisiblity()
  24. {
  25.     switch(a)
  26.     {
  27.      case 2:
  28.     {
  29.         ui->label2->setHidden(false);
  30.         ui->lineEdit_2->setHidden(false);
  31.     } break ;
  32.  
  33.     }
  34. }
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But it does not work !