window.cpp

QT 开发环境里面一个很重要的文件

/****************************************************************************
**
** Copyright (C) 2006-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
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** sales department at [e-mail].
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include <QtGui>

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

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

    sourceGroupBox = new QGroupBox(tr("Original Model"));
    proxyGroupBox = new QGroupBox(tr("Sorted/Filtered Model"));

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

    proxyView = new QTreeView;
    proxyView->setRootIsDecorated(false);
    proxyView->setAlternatingRowColors(true);
    proxyView->setModel(proxyModel);
    proxyView->setSortingEnabled(true);

    filterCaseSensitivityCheckBox = new QCheckBox(tr("Case sensitive filter"));

    filterPatternLineEdit = new QLineEdit;
    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;
    fromLabel = new QLabel(tr("F&rom:"));
    fromLabel->setBuddy(fromDateEdit);

    toDateEdit = new QDateEdit;
    toLabel = new QLabel(tr("&To:"));
    toLabel->setBuddy(toDateEdit);

    connect(filterPatternLineEdit, SIGNAL(textChanged(const QString &)),
            this, SLOT(textFilterChanged()));
    connect(filterSyntaxComboBox, SIGNAL(currentIndexChanged(int)),
            this, SLOT(textFilterChanged()));
    connect(filterCaseSensitivityCheckBox, SIGNAL(toggled(bool)),
            this, SLOT(textFilterChanged()));
    connect(fromDateEdit, SIGNAL(dateChanged(const QDate &)),
            this, SLOT(dateFilterChanged()));
    connect(toDateEdit, SIGNAL(dateChanged(const QDate &)),
            this, SLOT(dateFilterChanged()));

    QHBoxLayout *sourceLayout = new QHBoxLayout;
    sourceLayout->addWidget(sourceView);
    sourceGroupBox->setLayout(sourceLayout);

    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->setLayout(proxyLayout);

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addWidget(sourceGroupBox);
    mainLayout->addWidget(proxyGroupBox);
    setLayout(mainLayout);

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

    proxyView->sortByColumn(1, Qt::AscendingOrder);
    filterPatternLineEdit->setText("Grace|Sports");
    filterCaseSensitivityCheckBox->setChecked(true);

    fromDateEdit->setDate(QDate(1970, 01, 01));
    toDateEdit->setDate(QDate(2099, 12, 31));
}

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());
}