Qt 5.9 | Qt Widgets | Custom Sort/Filter Model Example | window.cpp Example File

Qt 5.9.9 Reference Documentation

# window.cpp Example File

itemviews/customsortfiltermodel/window.cpp

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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());
      }