window.cpp Example File | Qt Widgets 5.12.11

- Qt 5.12
- Qt Widgets
- Custom Sort/Filter Model Example
- window.cpp Example File
- Qt 5.12.11 Reference Documentation

# window.cpp Example File

itemviews/customsortfiltermodel/window.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2016 The Qt Company Ltd.
     ** Contact: https://www.qt.io/licensing/
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** Commercial License Usage
     ** Licensees holding valid commercial Qt licenses may use this file in
     ** accordance with the commercial license agreement provided with the
     ** Software or, alternatively, in accordance with the terms contained in
     ** a written agreement between you and The Qt Company. For licensing terms
     ** and conditions see https://www.qt.io/terms-conditions. For further
     ** information use the contact form at https://www.qt.io/contact-us.
     **
     ** BSD License Usage
     ** Alternatively, you may use this file under the terms of the BSD license
     ** as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of The Qt Company Ltd nor the names of its
     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
     **
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #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());
     }