window.cpp Example File

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 #include <QtWidgets>

 #include "mysortfilterproxymodel.h"
 #include "window.h"

 Window::Window()
 {
     proxyModel = new MySortFilterProxyModel(this);

     sourceView = new QTreeView;
     sourceView->setRootIsDecorated(false);
     sourceView->setAlternatingRowColors(true);

     QHBoxLayout *sourceLayout = new QHBoxLayout;
     sourceLayout->addWidget(sourceView);
     sourceGroupBox = new QGroupBox(tr("Original Model"));
     sourceGroupBox->setLayout(sourceLayout);

     filterCaseSensitivityCheckBox = new QCheckBox(tr("Case sensitive filter"));
     filterCaseSensitivityCheckBox->setChecked(true);

     filterPatternLineEdit = new QLineEdit;
     filterPatternLineEdit->setText("Grace|Sports");

     filterPatternLabel = new QLabel(tr("&Filter pattern:"));
     filterPatternLabel->setBuddy(filterPatternLineEdit);

     filterSyntaxComboBox = new QComboBox;
     filterSyntaxComboBox->addItem(tr("Regular expression"), QRegExp::RegExp);
     filterSyntaxComboBox->addItem(tr("Wildcard"), QRegExp::Wildcard);
     filterSyntaxComboBox->addItem(tr("Fixed string"), QRegExp::FixedString);

     fromDateEdit = new QDateEdit;
     fromDateEdit->setDate(QDate(1970, 01, 01));
     fromLabel = new QLabel(tr("F&rom:"));
     fromLabel->setBuddy(fromDateEdit);

     toDateEdit = new QDateEdit;
     toDateEdit->setDate(QDate(2099, 12, 31));
     toLabel = new QLabel(tr("&To:"));
     toLabel->setBuddy(toDateEdit);

     connect(filterPatternLineEdit, SIGNAL(textChanged(QString)),
             this, SLOT(textFilterChanged()));
     connect(filterSyntaxComboBox, SIGNAL(currentIndexChanged(int)),
             this, SLOT(textFilterChanged()));
     connect(filterCaseSensitivityCheckBox, SIGNAL(toggled(bool)),
             this, SLOT(textFilterChanged()));
     connect(fromDateEdit, SIGNAL(dateChanged(QDate)),
             this, SLOT(dateFilterChanged()));
     connect(toDateEdit, SIGNAL(dateChanged(QDate)),
             this, SLOT(dateFilterChanged()));

     proxyView = new QTreeView;
     proxyView->setRootIsDecorated(false);
     proxyView->setAlternatingRowColors(true);
     proxyView->setModel(proxyModel);
     proxyView->setSortingEnabled(true);
     proxyView->sortByColumn(1, Qt::AscendingOrder);

     QGridLayout *proxyLayout = new QGridLayout;
     proxyLayout->addWidget(proxyView, 0, 0, 1, 3);
     proxyLayout->addWidget(filterPatternLabel, 1, 0);
     proxyLayout->addWidget(filterPatternLineEdit, 1, 1);
     proxyLayout->addWidget(filterSyntaxComboBox, 1, 2);
     proxyLayout->addWidget(filterCaseSensitivityCheckBox, 2, 0, 1, 3);
     proxyLayout->addWidget(fromLabel, 3, 0);
     proxyLayout->addWidget(fromDateEdit, 3, 1, 1, 2);
     proxyLayout->addWidget(toLabel, 4, 0);
     proxyLayout->addWidget(toDateEdit, 4, 1, 1, 2);

     proxyGroupBox = new QGroupBox(tr("Sorted/Filtered Model"));
     proxyGroupBox->setLayout(proxyLayout);

     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(sourceGroupBox);
     mainLayout->addWidget(proxyGroupBox);
     setLayout(mainLayout);

     setWindowTitle(tr("Custom Sort/Filter Model"));
     resize(500, 450);
 }

 void Window::setSourceModel(QAbstractItemModel *model)
 {
     proxyModel->setSourceModel(model);
     sourceView->setModel(model);
 }

 void Window::textFilterChanged()
 {
     QRegExp::PatternSyntax syntax =
             QRegExp::PatternSyntax(filterSyntaxComboBox->itemData(
                     filterSyntaxComboBox->currentIndex()).toInt());
     Qt::CaseSensitivity caseSensitivity =
             filterCaseSensitivityCheckBox->isChecked() ? Qt::CaseSensitive
                 : Qt::CaseInsensitive;

     QRegExp regExp(filterPatternLineEdit->text(), caseSensitivity, syntax);
     proxyModel->setFilterRegExp(regExp);
 }

 void Window::dateFilterChanged()
 {
     proxyModel->setFilterMinimumDate(fromDateEdit->date());
     proxyModel->setFilterMaximumDate(toDateEdit->date());
 }