window.cpp Example File | Qt Widgets 5.6

Qt 5.6 | Qt Widgets | Line Edits Example | window.cpp Example File

Qt 5.6.2 Reference Documentation

# window.cpp Example File

widgets/lineedits/window.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the examples of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** You may use this file under the terms of the BSD license as follows:
      **
      ** "Redistribution and use in source and binary forms, with or without
      ** modification, are permitted provided that the following conditions are
      ** met:
      **   * Redistributions of source code must retain the above copyright
      **     notice, this list of conditions and the following disclaimer.
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      **     notice, this list of conditions and the following disclaimer in
      **     the documentation and/or other materials provided with the
      **     distribution.
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      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
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      ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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      #include <QtWidgets>

      #include "window.h"

      Window::Window()
      {
          QGroupBox *echoGroup = new QGroupBox(tr("Echo"));

          QLabel *echoLabel = new QLabel(tr("Mode:"));
          QComboBox *echoComboBox = new QComboBox;
          echoComboBox->addItem(tr("Normal"));
          echoComboBox->addItem(tr("Password"));
          echoComboBox->addItem(tr("PasswordEchoOnEdit"));
          echoComboBox->addItem(tr("No Echo"));

          echoLineEdit = new QLineEdit;
          echoLineEdit->setPlaceholderText("Placeholder Text");
          echoLineEdit->setFocus();

          QGroupBox *validatorGroup = new QGroupBox(tr("Validator"));

          QLabel *validatorLabel = new QLabel(tr("Type:"));
          QComboBox *validatorComboBox = new QComboBox;
          validatorComboBox->addItem(tr("No validator"));
          validatorComboBox->addItem(tr("Integer validator"));
          validatorComboBox->addItem(tr("Double validator"));

          validatorLineEdit = new QLineEdit;
          validatorLineEdit->setPlaceholderText("Placeholder Text");

          QGroupBox *alignmentGroup = new QGroupBox(tr("Alignment"));

          QLabel *alignmentLabel = new QLabel(tr("Type:"));
          QComboBox *alignmentComboBox = new QComboBox;
          alignmentComboBox->addItem(tr("Left"));
          alignmentComboBox->addItem(tr("Centered"));
          alignmentComboBox->addItem(tr("Right"));

          alignmentLineEdit = new QLineEdit;
          alignmentLineEdit->setPlaceholderText("Placeholder Text");

          QGroupBox *inputMaskGroup = new QGroupBox(tr("Input mask"));

          QLabel *inputMaskLabel = new QLabel(tr("Type:"));
          QComboBox *inputMaskComboBox = new QComboBox;
          inputMaskComboBox->addItem(tr("No mask"));
          inputMaskComboBox->addItem(tr("Phone number"));
          inputMaskComboBox->addItem(tr("ISO date"));
          inputMaskComboBox->addItem(tr("License key"));

          inputMaskLineEdit = new QLineEdit;
          inputMaskLineEdit->setPlaceholderText("Placeholder Text");

          QGroupBox *accessGroup = new QGroupBox(tr("Access"));

          QLabel *accessLabel = new QLabel(tr("Read-only:"));
          QComboBox *accessComboBox = new QComboBox;
          accessComboBox->addItem(tr("False"));
          accessComboBox->addItem(tr("True"));

          accessLineEdit = new QLineEdit;
          accessLineEdit->setPlaceholderText("Placeholder Text");

          connect(echoComboBox, SIGNAL(activated(int)),
                  this, SLOT(echoChanged(int)));
          connect(validatorComboBox, SIGNAL(activated(int)),
                  this, SLOT(validatorChanged(int)));
          connect(alignmentComboBox, SIGNAL(activated(int)),
                  this, SLOT(alignmentChanged(int)));
          connect(inputMaskComboBox, SIGNAL(activated(int)),
                  this, SLOT(inputMaskChanged(int)));
          connect(accessComboBox, SIGNAL(activated(int)),
                  this, SLOT(accessChanged(int)));

          QGridLayout *echoLayout = new QGridLayout;
          echoLayout->addWidget(echoLabel, 0, 0);
          echoLayout->addWidget(echoComboBox, 0, 1);
          echoLayout->addWidget(echoLineEdit, 1, 0, 1, 2);
          echoGroup->setLayout(echoLayout);

          QGridLayout *validatorLayout = new QGridLayout;
          validatorLayout->addWidget(validatorLabel, 0, 0);
          validatorLayout->addWidget(validatorComboBox, 0, 1);
          validatorLayout->addWidget(validatorLineEdit, 1, 0, 1, 2);
          validatorGroup->setLayout(validatorLayout);

          QGridLayout *alignmentLayout = new QGridLayout;
          alignmentLayout->addWidget(alignmentLabel, 0, 0);
          alignmentLayout->addWidget(alignmentComboBox, 0, 1);
          alignmentLayout->addWidget(alignmentLineEdit, 1, 0, 1, 2);
          alignmentGroup-> setLayout(alignmentLayout);

          QGridLayout *inputMaskLayout = new QGridLayout;
          inputMaskLayout->addWidget(inputMaskLabel, 0, 0);
          inputMaskLayout->addWidget(inputMaskComboBox, 0, 1);
          inputMaskLayout->addWidget(inputMaskLineEdit, 1, 0, 1, 2);
          inputMaskGroup->setLayout(inputMaskLayout);

          QGridLayout *accessLayout = new QGridLayout;
          accessLayout->addWidget(accessLabel, 0, 0);
          accessLayout->addWidget(accessComboBox, 0, 1);
          accessLayout->addWidget(accessLineEdit, 1, 0, 1, 2);
          accessGroup->setLayout(accessLayout);

          QGridLayout *layout = new QGridLayout;
          layout->addWidget(echoGroup, 0, 0);
          layout->addWidget(validatorGroup, 1, 0);
          layout->addWidget(alignmentGroup, 2, 0);
          layout->addWidget(inputMaskGroup, 0, 1);
          layout->addWidget(accessGroup, 1, 1);
          setLayout(layout);

          setWindowTitle(tr("Line Edits"));
      }

      void Window::echoChanged(int index)
      {
          switch (index) {
          case 0:
              echoLineEdit->setEchoMode(QLineEdit::Normal);
              break;
          case 1:
              echoLineEdit->setEchoMode(QLineEdit::Password);
              break;
          case 2:
              echoLineEdit->setEchoMode(QLineEdit::PasswordEchoOnEdit);
              break;
          case 3:
              echoLineEdit->setEchoMode(QLineEdit::NoEcho);
          }
      }

      void Window::validatorChanged(int index)
      {
          switch (index) {
          case 0:
              validatorLineEdit->setValidator(0);
              break;
          case 1:
              validatorLineEdit->setValidator(new QIntValidator(
                  validatorLineEdit));
              break;
          case 2:
              validatorLineEdit->setValidator(new QDoubleValidator(-999.0,
                  999.0, 2, validatorLineEdit));
          }

          validatorLineEdit->clear();
      }

      void Window::alignmentChanged(int index)
      {
          switch (index) {
          case 0:
              alignmentLineEdit->setAlignment(Qt::AlignLeft);
              break;
          case 1:
              alignmentLineEdit->setAlignment(Qt::AlignCenter);
              break;
          case 2:
              alignmentLineEdit->setAlignment(Qt::AlignRight);
          }
      }

      void Window::inputMaskChanged(int index)
      {
          switch (index) {
          case 0:
              inputMaskLineEdit->setInputMask("");
              break;
          case 1:
              inputMaskLineEdit->setInputMask("+99 99 99 99 99;_");
              break;
          case 2:
              inputMaskLineEdit->setInputMask("0000-00-00");
              inputMaskLineEdit->setText("00000000");
              inputMaskLineEdit->setCursorPosition(0);
              break;
          case 3:
              inputMaskLineEdit->setInputMask(">AAAAA-AAAAA-AAAAA-AAAAA-AAAAA;#");
          }
      }

      void Window::accessChanged(int index)
      {
          switch (index) {
          case 0:
              accessLineEdit->setReadOnly(false);
              break;
          case 1:
              accessLineEdit->setReadOnly(true);
          }
      }