QLineEdit setSelecttion(int start, int length) bug? Input mask is IP address.

[zimang]

Hi guys:

I want ot have a IP address editor , and use the Key_Left and Key_Right control the text selection between dots. Now, I set the editor like this:

setInputMaks("000.000.000.000");
 
.....
        case Qt::Key_Left:
            if (m_selected >= 0 )
            {
                this->setSelection(m_selected, 3);
                if (m_selected > 3)
                    m_selected -= 4;
            }
            break;
 
        case Qt::Key_Right:
            if (m_selected <= 12)
            {
                this->setSelection(m_selected, 3);
                if (m_selected < 12)
                    m_selected += 4;
            }
 
            break;
...

setInputMaks("000.000.000.000");

.....
        case Qt::Key_Left:
            if (m_selected >= 0 )
            {
                this->setSelection(m_selected, 3);
                if (m_selected > 3)
                    m_selected -= 4;
            }
            break;

        case Qt::Key_Right:
            if (m_selected <= 12)
            {
                this->setSelection(m_selected, 3);
                if (m_selected < 12)
                    m_selected += 4;
            }

            break;
...

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It works when the input liks 192.168.1.112, but when the input is less than 9 chars (as 192.168.1.1), the Key_Right. It means I will never input the IP address like 192.168.0.XXX or else chars less than 9.

So, is there any way to resolve this problem: the Key_Right or Key_Left selects the area between two idos.

---

Added after 26 minutes:

It works on X11, but can't be in embelded.

[trallallero]

Old thread but I have a similar problem.

I set the selection to (0, 0) but all the text is selected anyway.
If I comment setFocus, then no text is selected (but in that case I don't need any call to setSelection(0, 0)).

#include <QtGui>
 
int main(int argc, char *argv[])
{
   QApplication app(argc, argv);
 
   QDialog* dg = new QDialog();
 
   QLineEdit* le = new QLineEdit(dg);
   le->setText("test");
   le->setFocus();
   le->setSelection(0, 0);
   dg->exec();
 
   return app.exec();
}

#include <QtGui>

int main(int argc, char *argv[])
{
   QApplication app(argc, argv);

   QDialog* dg = new QDialog();

   QLineEdit* le = new QLineEdit(dg);
   le->setText("test");
   le->setFocus();
   le->setSelection(0, 0);
   dg->exec();

   return app.exec();
}

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QT       += gui core
 
TARGET = dialog
TEMPLATE = app
 
HEADERS       = 
 
SOURCES       = main.cpp

QT       += gui core

TARGET = dialog
TEMPLATE = app

HEADERS       = 

SOURCES       = main.cpp

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screenshotgps.png