window.cpp Example File

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 #include <QtWidgets>

 #include "mysortfilterproxymodel.h"
 #include "window.h"
 #include "filterwidget.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);

     filterWidget = new FilterWidget;
     filterWidget->setText("Grace|Sports");
     connect(filterWidget, &FilterWidget::filterChanged, this, &Window::textFilterChanged);

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

     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(filterWidget, &QLineEdit::textChanged,
             this, &Window::textFilterChanged);
     connect(fromDateEdit, &QDateTimeEdit::dateChanged,
             this, &Window::dateFilterChanged);
     connect(toDateEdit, &QDateTimeEdit::dateChanged,
             this, &Window::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(filterWidget, 1, 1);
     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 regExp(filterWidget->text(),
                    filterWidget->caseSensitivity(),
                    filterWidget->patternSyntax());
     proxyModel->setFilterRegExp(regExp);
 }

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