Can't catch key_down and some keys

[anafor2004]

Hi All
I am using kepress event for catching key_up key_down buttons but my program cant do this but it can catch A,B,C,D,......Z .What is the problem i cant get it?

Header file

#ifndef BAYRAK_H
#define BAYRAK_H
 
#include <QtGui/QMainWindow>
#include "ui_bayrak.h"
#include <QtGui/QMainWindow>
#include <QKeyEvent>
#include <QTimer>
 
class bayrak : public QMainWindow
{
    Q_OBJECT
 
public:
    bayrak(QWidget *parent = 0);
    ~bayrak();
 
private:
    Ui::bayrakClass ui;
    void load();
    void ayar();
protected:
	 void keyPressEvent(QKeyEvent *keyEvent);
 
protected slots:
	 void sag();
	 void sol();
private:
	QTimer timer;
	QString str[8];
	buton *flag[4];
	int k;
};
 
#endif // BAYRAK_H

#ifndef BAYRAK_H
#define BAYRAK_H

#include <QtGui/QMainWindow>
#include "ui_bayrak.h"
#include <QtGui/QMainWindow>
#include <QKeyEvent>
#include <QTimer>

class bayrak : public QMainWindow
{
    Q_OBJECT

public:
    bayrak(QWidget *parent = 0);
    ~bayrak();
     
private:
    Ui::bayrakClass ui;
    void load();
    void ayar();
protected:
	 void keyPressEvent(QKeyEvent *keyEvent);
	 
protected slots:
	 void sag();
	 void sol();
private:
	QTimer timer;
	QString str[8];
	buton *flag[4];
	int k;
};

#endif // BAYRAK_H

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keyPressEvent.

void bayrak::keyPressEvent(QKeyEvent *keyEvent)
{
	switch(keyEvent->key())
	{
	case Qt::Key_Up:
		timer.singleShot(150,this,SLOT(sol()));
		break;
	case Qt::Key_Down:
		timer.singleShot(150,this,SLOT(sag()));
		break;
	default:	
			QMainWindow::keyPressEvent(keyEvent);	
 
	}

void bayrak::keyPressEvent(QKeyEvent *keyEvent)
{
	switch(keyEvent->key())
	{
	case Qt::Key_Up:
		timer.singleShot(150,this,SLOT(sol()));
		break;
	case Qt::Key_Down:
		timer.singleShot(150,this,SLOT(sag()));
		break;
	default:	
			QMainWindow::keyPressEvent(keyEvent);	
		
	}

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[wysota]

How do you know it doesn't work? Maybe the problem is with these slots and not the event handler (it looks ok).

[anafor2004]

If i change the code like that

void bayrak::keyPressEvent(QKeyEvent *keyEvent)
{
    switch(keyEvent->key())
    {
    case Qt::Key_A:
        timer.singleShot(150,this,SLOT(sol()));
        break;
    case Qt::Key_S:
        timer.singleShot(150,this,SLOT(sag()));
        break;
    default:    
            QMainWindow::keyPressEvent(keyEvent);   
 
    }

void bayrak::keyPressEvent(QKeyEvent *keyEvent)
{
    switch(keyEvent->key())
    {
    case Qt::Key_A:
        timer.singleShot(150,this,SLOT(sol()));
        break;
    case Qt::Key_S:
        timer.singleShot(150,this,SLOT(sag()));
        break;
    default:    
            QMainWindow::keyPressEvent(keyEvent);   
        
    }

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It works, if i change the keys as A and S it works.But key up and down doesnt work.

[wysota]

In that case probably there is an event filter applied on the main window or the cursor keys are handled in its event() method. You can apply your own event filter and handle the keys there.

[anafor2004]

How may i do this?

[anafor2004]

Ok i solve the problem , the problem was about the strong focus policy.It was using arrow keys.I changed it to no focus and , DONE!!!!

Thanks Wysota