finddialog.cpp Example File

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  #include <QtWidgets>

  #include "finddialog.h"

  FindDialog::FindDialog(QWidget *parent)
      : QDialog(parent)
  {
      label = new QLabel(tr("Find &what:"));
      lineEdit = new QLineEdit;
      label->setBuddy(lineEdit);

      caseCheckBox = new QCheckBox(tr("Match &case"));
      fromStartCheckBox = new QCheckBox(tr("Search from &start"));
      fromStartCheckBox->setChecked(true);

      findButton = new QPushButton(tr("&Find"));
      findButton->setDefault(true);

      moreButton = new QPushButton(tr("&More"));
      moreButton->setCheckable(true);
      moreButton->setAutoDefault(false);


      extension = new QWidget;

      wholeWordsCheckBox = new QCheckBox(tr("&Whole words"));
      backwardCheckBox = new QCheckBox(tr("Search &backward"));
      searchSelectionCheckBox = new QCheckBox(tr("Search se&lection"));

      buttonBox = new QDialogButtonBox(Qt::Vertical);
      buttonBox->addButton(findButton, QDialogButtonBox::ActionRole);
      buttonBox->addButton(moreButton, QDialogButtonBox::ActionRole);

      connect(moreButton, &QAbstractButton::toggled, extension, &QWidget::setVisible);

      QVBoxLayout *extensionLayout = new QVBoxLayout;
      extensionLayout->setMargin(0);
      extensionLayout->addWidget(wholeWordsCheckBox);
      extensionLayout->addWidget(backwardCheckBox);
      extensionLayout->addWidget(searchSelectionCheckBox);
      extension->setLayout(extensionLayout);

      QHBoxLayout *topLeftLayout = new QHBoxLayout;
      topLeftLayout->addWidget(label);
      topLeftLayout->addWidget(lineEdit);

      QVBoxLayout *leftLayout = new QVBoxLayout;
      leftLayout->addLayout(topLeftLayout);
      leftLayout->addWidget(caseCheckBox);
      leftLayout->addWidget(fromStartCheckBox);

      QGridLayout *mainLayout = new QGridLayout;
      mainLayout->setSizeConstraint(QLayout::SetFixedSize);
      mainLayout->addLayout(leftLayout, 0, 0);
      mainLayout->addWidget(buttonBox, 0, 1);
      mainLayout->addWidget(extension, 1, 0, 1, 2);
      mainLayout->setRowStretch(2, 1);

      setLayout(mainLayout);

      setWindowTitle(tr("Extension"));
      extension->hide();
  }