Qt 4.8: window.cpp Example File (itemviews/customsortfiltermodel/window.cpp)

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# window.cpp Example File

itemviews/customsortfiltermodel/window.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** 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.
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     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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     ** 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
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     #include <QtGui>

     #include "mysortfilterproxymodel.h"
     #include "window.h"

     Window::Window()
     {
         proxyModel = new MySortFilterProxyModel(this);
         proxyModel->setDynamicSortFilter(true);

         sourceView = new QTreeView;
         sourceView->setRootIsDecorated(false);
         sourceView->setAlternatingRowColors(true);

         QHBoxLayout *sourceLayout = new QHBoxLayout;
         sourceLayout->addWidget(sourceView);
     #if defined(Q_OS_SYMBIAN) || defined(Q_WS_MAEMO_5) || defined(Q_WS_SIMULATOR)
         sourceWidget = new QWidget;
         sourceWidget->setLayout(sourceLayout);
     #else
         sourceGroupBox = new QGroupBox(tr("Original Model"));
         sourceGroupBox->setLayout(sourceLayout);
     #endif

         filterCaseSensitivityCheckBox = new QCheckBox(tr("Case sensitive filter"));
         filterCaseSensitivityCheckBox->setChecked(true);

         filterPatternLineEdit = new QLineEdit;
         filterPatternLineEdit->setText("Grace|Sports");

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

         filterSyntaxComboBox = new QComboBox;
         filterSyntaxComboBox->addItem(tr("Regular expression"), QRegExp::RegExp);
         filterSyntaxComboBox->addItem(tr("Wildcard"), QRegExp::Wildcard);
         filterSyntaxComboBox->addItem(tr("Fixed string"), QRegExp::FixedString);

         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(filterPatternLineEdit, SIGNAL(textChanged(QString)),
                 this, SLOT(textFilterChanged()));
         connect(filterSyntaxComboBox, SIGNAL(currentIndexChanged(int)),
                 this, SLOT(textFilterChanged()));
         connect(filterCaseSensitivityCheckBox, SIGNAL(toggled(bool)),
                 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);

     #if defined(Q_OS_SYMBIAN) || defined(Q_WS_MAEMO_5) || defined(Q_WS_SIMULATOR)
         QGridLayout *filterLayout = new QGridLayout;
         filterLayout->addWidget(filterPatternLabel, 0, 0);
         filterLayout->addWidget(filterPatternLineEdit, 0, 1);
         filterLayout->addWidget(filterSyntaxComboBox, 0, 2);
         filterLayout->addWidget(filterCaseSensitivityCheckBox, 1, 0, 1, 3);
         filterLayout->addWidget(fromLabel, 2, 0);
         filterLayout->addWidget(fromDateEdit, 2, 1, 1, 2);
         filterLayout->addWidget(toLabel, 3, 0);
         filterLayout->addWidget(toDateEdit, 3, 1, 1, 2);

         filterWidget = new QWidget;
         filterWidget->setLayout(filterLayout);

         QHBoxLayout *proxyLayout = new QHBoxLayout;
         proxyLayout->addWidget(proxyView);

         proxyWidget = new QWidget;
         proxyWidget->setLayout(proxyLayout);
     #else
         QGridLayout *proxyLayout = new QGridLayout;
         proxyLayout->addWidget(proxyView, 0, 0, 1, 3);
         proxyLayout->addWidget(filterPatternLabel, 1, 0);
         proxyLayout->addWidget(filterPatternLineEdit, 1, 1);
         proxyLayout->addWidget(filterSyntaxComboBox, 1, 2);
         proxyLayout->addWidget(filterCaseSensitivityCheckBox, 2, 0, 1, 3);
         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);
     #endif

     #if defined(Q_OS_SYMBIAN) || defined(Q_WS_MAEMO_5) || defined(Q_WS_SIMULATOR)
         QTabWidget *tabWidget = new QTabWidget;
         tabWidget->addTab(sourceWidget, "Original");
         tabWidget->addTab(filterWidget, "Filters");
         tabWidget->addTab(proxyWidget, "Sorted");

         QVBoxLayout *mainLayout = new QVBoxLayout;
         mainLayout->addWidget(tabWidget);
         setLayout(mainLayout);
         setWindowTitle(tr("Custom Model"));
     #else
         QVBoxLayout *mainLayout = new QVBoxLayout;
         mainLayout->addWidget(sourceGroupBox);
         mainLayout->addWidget(proxyGroupBox);
         setLayout(mainLayout);

         setWindowTitle(tr("Custom Sort/Filter Model"));
         resize(500, 450);
     #endif
     }

     void Window::setSourceModel(QAbstractItemModel *model)
     {
         proxyModel->setSourceModel(model);
         sourceView->setModel(model);
     }

     void Window::textFilterChanged()
     {
         QRegExp::PatternSyntax syntax =
                 QRegExp::PatternSyntax(filterSyntaxComboBox->itemData(
                         filterSyntaxComboBox->currentIndex()).toInt());
         Qt::CaseSensitivity caseSensitivity =
                 filterCaseSensitivityCheckBox->isChecked() ? Qt::CaseSensitive
                     : Qt::CaseInsensitive;

         QRegExp regExp(filterPatternLineEdit->text(), caseSensitivity, syntax);
         proxyModel->setFilterRegExp(regExp);
     }

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