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());
  }