QT - My way to force numeric input - maemo.org

Active Topics

List of well performing apps on Leste (35)
to Maemo 7 / Leste by smatkovi - 1 day, 11 hrs ago
Porting apps to Leste (43)
to Maemo 7 / Leste by teroyk - 1 day, 18 hrs ago
Sailfish OS for the Motorola Moto G7 Power (XT1955-5) - (ocean) (13)
to SailfishOS by edp17 - 2 days, 9 hrs ago
Sailfish OS for the Samsung Galaxy Note 4 (SM-N910C) - (treltexx) (79)
to SailfishOS by edp17 - 2 days, 10 hrs ago
U-Boot for Nokia RX-51 with BootMenu (updated version 2012.10-rc3-1) (843)
to Alternatives by Arno_11 - 2 days, 15 hrs ago
Maemo repository (5)
to Community by dredlok706 - 5 days, 10 hrs ago
Re-commissioning N9 in 2018 (127)
to MeeGo / Harmattan by smatkovi - 5 days, 13 hrs ago
more...

Thread Tools

	shep	2010-02-15 , 22:15
	Posts: 85 \| Thanked: 65 times \| Joined on Jan 2010 @ Ireland	#1

This is probably lame, but I thought I'd share my method for making a lineEdit into a numeric only input.

Code:

void MainWindow::on_lineEdit_textChanged(QString )
{
    QString qNewValue = ui->lineEdit->text();
    bool ok;
    double dTest = qNewValue.toDouble(&ok);
    int dotCnt=0;
    if (!ok)
    {
        QString qStripped;

        for (int i=0; i< qNewValue.length(); i++ )
        {
            QString subStr = qNewValue.at(i);
            QString sValid = "1234567890.";
            if (subStr.toLower() == ":")
            {
                subStr = ".";
            }
            if (subStr.toLower() == "?")
            {
                subStr = ".";
            }

            if (subStr==".")
            {
                dotCnt++;
            }
            if (subStr.toLower() == "q")
            {
                subStr = "1";
            }
            if (subStr.toLower() == "w")
            {
                subStr = "2";
            }
            if (subStr.toLower() == "e")
            {
                subStr = "3";
            }
            if (subStr.toLower() == "r")
            {
                subStr = "4";
            }
            if (subStr.toLower() == "t")
            {
                subStr = "5";
            }
            if (subStr.toLower() == "y")
            {
                subStr = "6";
            }
            if (subStr.toLower() == "u")
            {
                subStr = "7";
            }
            if (subStr.toLower() == "i")
            {
                subStr = "8";
            }
            if (subStr.toLower() == "o")
            {
                subStr = "9";
            }
            if (subStr.toLower() == "p")
            {
                subStr = "0";
            }
            if ( (sValid.contains( subStr)) && (dotCnt <= 1))
            {
                qStripped.append(subStr);
            }
        }
        ui->lineEdit->setText(qStripped);
    }

}

Hopes this helps someone.

Last edited by shep; 2010-02-15 at 22:21.

Quote & Reply |

The Following User Says Thank You to shep For This Useful Post:
qwerty12

	b666m	2010-02-15 , 22:17
	Posts: 1,090 \| Thanked: 476 times \| Joined on Jan 2010 @ Ingolstadt, Germany	#2

set your code into the code-tag [.code] [./code] (of course without the . )

Quote & Reply |

The Following User Says Thank You to b666m For This Useful Post:
shep

	shep	2010-02-15 , 22:21
	Posts: 85 \| Thanked: 65 times \| Joined on Jan 2010 @ Ireland	#3

Originally Posted by b666m

set your code into the code-tag [.code] [./code] (of course without the . )

Done, thanks!

Quote & Reply |

	qwerty12	2010-02-15 , 22:30
	Posts: 4,274 \| Thanked: 5,358 times \| Joined on Sep 2007 @ Looking at y'all and sighing	#4

What about ze Germans with their QWERTZ keyboards? (Being qwerty12, I have to boo at the Germans for using the QWERTZ layout on their keyboards anyway, but...

)

Last edited by qwerty12; 2010-02-15 at 22:38.

Quote & Reply |

The Following User Says Thank You to qwerty12 For This Useful Post:
shep

	w00t	2010-02-15 , 22:31
	Posts: 1,055 \| Thanked: 4,107 times \| Joined on Oct 2009 @ Norway	#5

I'd suggest looking at:

http://doc.trolltech.com/4.6/qwidget...thodHints-prop

and

http://doc.trolltech.com/4.6/qlineed...inputMask-prop

and

http://doc.trolltech.com/4.6/qlineed...l#setValidator

Hope this helps.

__________________
i'm a Qt expert and former Jolla sailor (forever sailing, in spirit).
if you like, read more about me.
if you find me entertaining, or useful, thank me. if you don't, then tell me why.

Quote & Reply |

The Following 2 Users Say Thank You to w00t For This Useful Post:
krk969, shep

	shep	2010-02-15 , 22:40
	Posts: 85 \| Thanked: 65 times \| Joined on Jan 2010 @ Ireland	#6

Originally Posted by qwerty12

What about ze Germans with their QWERTZ keyboards? (Being qwerty12, I have to boo at the Germans for using the QWERTZ layout on their keyboards anyway, but... )

I did say it sucked

If you forget about the qwertyuiop to 1234567890 translation then the basic principle is sound! Just did the translation for lazy old me.

Shep

Quote & Reply |

	shep	2010-02-15 , 22:42
	Posts: 85 \| Thanked: 65 times \| Joined on Jan 2010 @ Ireland	#7

Originally Posted by w00t

I'd suggest looking at...

Thanks woot, unfortunately the inputHints don't work using Madde at the moment

that's why I went looking for an alt in the first place.

Thanks for the tips though

Quote & Reply |

	w00t	2010-02-15 , 23:46
	Posts: 1,055 \| Thanked: 4,107 times \| Joined on Oct 2009 @ Norway	#8

Originally Posted by shep

Thanks woot, unfortunately the inputHints don't work using Madde at the moment that's why I went looking for an alt in the first place.

Thanks for the tips though

Ah. Yeah, they're new to Qt 4.6, and MADDE has 4.5 at the moment... *but*, input hints are only for the virtual keyboard. The actual restriction of input can be done through validators