- Qt 5.5
- Qt Widgets
- Custom Sort/Filter Model Example
- window.cpp Example File
- Qt 5.5.1 Reference Documentation

# window.cpp Example File

itemviews/customsortfiltermodel/window.cpp

    /****************************************************************************
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    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
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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, SIGNAL(filterChanged()), this, SLOT(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, SIGNAL(textChanged(QString)),
                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(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());
    }