I would like to catch the Space key in my app.
The header:

Qt Code: 
  1. #pragma once
  2. #include <QWidget>
  3. #include <iitem.hpp>
  4. #include <ui_invpg.h>
  5.  
  6.  
  7. class InvPage : public QWidget
  8. {
  9.   Q_OBJECT
  10.  
  11.   public :
  12.  
  13.     InvPage();
  14.     virtual ~InvPage();
  15.  
  16.     void   clear();
  17.     void   ClearSel();
  18.     void   MakeList();
  19.     void   MakeInv();
  20.     void   LoadData();
  21.  
  22.     IItem *theitem;
  23.     bool   addit;
  24.  
  25.   protected :
  26.  
  27.     virtual void keyPressEvent( QKeyEvent *event );
  28.  
  29.   private :
  30.  
  31.     Ui::InvPage    ui;
  32.  
  33.   private slots :
  34.  
  35.     void ItemClicked( QListWidgetItem *item );
  36. };
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The ctor contains only ui.setupUi(this). The (current) implementation should test whether the handler works:

Qt Code: 
  1. #include <QWidget>
  2. #include <QKeyEvent>
  3. #include <myapp.hpp>
  4. #include <myframe.hpp>
  5. #include <invpage.hpp>
  6. #include <iitem.hpp>
  7. #include <data.hpp>
  8.  
  9.  
  10. void InvPage::keyPressEvent( QKeyEvent *event )
  11. {
  12.   if( event->key() == Qt::Key_Space )
  13.   {
  14.     char str[40];
  15.  
  16.     sprintf(str,"%s",(addit ? "addit = true" : "addit = false"));
  17.     TheApp->frame->statusBar()->showMessage(str,2000);
  18.   }
  19.  
  20.   QWidget::keyPressEvent(event);
  21. }
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It does not work. Putting a breakpoint at the "if" shows that the handler isn't called at all. What kind of blunder am I making? (Note: the statusbar works fine.)