How to catch caret-Key

[griffin27]

Hi there,

i want to listen to the "caret-key" (^) on the keyboard.
in QWidget::keyPressEvent()

1) is this possible in general?
because on my system i have to press it twice so see it in an editor (like here in this forum), and then i get 2 of them.

2) what is the Qt::Key_xxxx enumerator for it?

I need it for a GUI calculator-application.

kind regards, Karl

[divanov]

Check QKeyEvent example
http://wiki.forum.nokia.com/index.ph...yEventTest.zip

Another example
http://wiki.forum.nokia.com/index.ph...y_events_in_Qt

[griffin27]

Sorry Daniil for my unprecise manner of expression.

I ment, its no problem to listen for any key of the keyboard e.g. Digits, Return, Enter, ....
But what makes my problem is the caret-key. Is there any possible way to get knowing of if it is pressed or not?

kind regards, Karl

EDIT: it is the Qt::Key_AsciiCircum (0x5e)
But still having the problem getting this event only, when i press the key twice...

[divanov]

On my keyboard it's Qt::Key_Dead_Circumflex.

[danhicksbyron]

Note that on some national language keybaords certain keys may be "mangled" in the keyboard handler. Eg, "^" may be "queued" until the next key is pressed, to see if the next key is a "o", and then, if so, the decimal 147 character will be emitted.

[tamhanna]

Hi,
I am currently developing a keyboard based game - and have found out that the best way is an offscreen text field. I have a PlainTextEdit on the form - the rest is in the code below:

#include "QtGameForm.h"
#include <QKeyEvent>
#include <QMessageBox>
#include <aknviewappui.h>


QtGameForm::QtGameForm(QWidget *parent)
    : QMainWindow(parent)
{
	ui.setupUi(this);

	
	//arm the decoy field (like on the palm)
	ui.dummyEdit->grabKeyboard();
	//ui.dummyEdit->setVisible(false); MUST BE VISIBLE!!!
	connect(ui.dummyEdit,SIGNAL(textChanged()),this,SLOT(textChanged()));
	ui.dummyEdit->setGeometry(700,700,2,2); //MOVE OFFSCREEN
}

QtGameForm::~QtGameForm()
{
}

void QtGameForm::textChanged()
{
	QString s=ui.dummyEdit->toPlainText();
	if(s==NULL)return;
		for(int oi=0;oi<s.length();oi++)
		{
			QChar suppliedChar=s[oi];
			qint32 i;
			qint32 best_elem=162;
			qint16 maxdepth=-1;
			//TOUCHEvtResetAutoOffTimer();
			for(i=0;i<100;i++)
				{
					if(prefs.vars->sign[i]==suppliedChar && prefs.vars->paused==false)
					{
						if(maxdepth<prefs.vars->ypos[i])
						{
							best_elem=i;
							maxdepth=prefs.vars->ypos[i];
						}
					}
				}

				if(best_elem<162) //it is set to 162 by default, if nothing is found
				{
					if(prefs.consts->players==1)
					{
						prefs.chars_hit[prefs.vars->sign[best_elem]]++;
					}
					prefs.vars->sign[best_elem]=NULL;
					prefs.vars->xpos[best_elem]=NULL;
					prefs.vars->ypos[best_elem]=NULL;
					prefs.consts->hitChars++;
					prefs.consts->hitstroke++;
					prefs.consts->charsonscreen--;
					if(prefs.consts->lifeleft<158)
					{
						prefs.consts->lifeleft++;
					}
				}
		
		
		}
		ui.dummyEdit->setPlainText(QString(""));
}