window.cpp Example File

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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);
      }
  }