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# finddialog.cpp Example File
dialogs/extension/finddialog.cpp

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     #include <QtGui>

     #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);

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

         extension = new QWidget;

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

         connect(moreButton, SIGNAL(toggled(bool)), extension, SLOT(setVisible(bool)));

         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);
         leftLayout->addStretch(1);

         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);
         setLayout(mainLayout);

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