C++/Qt/QSortFilterProxyModel
extends QSortFilterProxyModel to create your own filter model
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#ifndef MYSORTFILTERPROXYMODEL_H
#define MYSORTFILTERPROXYMODEL_H
#include <QDate>
#include <QSortFilterProxyModel>
class MySortFilterProxyModel : public QSortFilterProxyModel
{
Q_OBJECT
public:
MySortFilterProxyModel(QObject *parent = 0);
QDate filterMinimumDate() const { return minDate; }
void setFilterMinimumDate(const QDate &date);
QDate filterMaximumDate() const { return maxDate; }
void setFilterMaximumDate(const QDate &date);
protected:
bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const;
bool lessThan(const QModelIndex &left, const QModelIndex &right) const;
private:
bool dateInRange(const QDate &date) const;
QDate minDate;
QDate maxDate;
};
#endif
#include <QtGui>
#include "mysortfilterproxymodel.h"
MySortFilterProxyModel::MySortFilterProxyModel(QObject *parent)
: QSortFilterProxyModel(parent)
{
}
void MySortFilterProxyModel::setFilterMinimumDate(const QDate &date)
{
minDate = date;
invalidateFilter();
}
void MySortFilterProxyModel::setFilterMaximumDate(const QDate &date)
{
maxDate = date;
invalidateFilter();
}
bool MySortFilterProxyModel::filterAcceptsRow(int sourceRow,
const QModelIndex &sourceParent) const
{
QModelIndex index0 = sourceModel()->index(sourceRow, 0, sourceParent);
QModelIndex index1 = sourceModel()->index(sourceRow, 1, sourceParent);
QModelIndex index2 = sourceModel()->index(sourceRow, 2, sourceParent);
return (sourceModel()->data(index0).toString().contains(filterRegExp())
|| sourceModel()->data(index1).toString().contains(filterRegExp()))
&& dateInRange(sourceModel()->data(index2).toDate());
}
bool MySortFilterProxyModel::lessThan(const QModelIndex &left,
const QModelIndex &right) const
{
QVariant leftData = sourceModel()->data(left);
QVariant rightData = sourceModel()->data(right);
if (leftData.type() == QVariant::DateTime) {
return leftData.toDateTime() < rightData.toDateTime();
} else {
QRegExp *emailPattern = new QRegExp("([\\w\\.]*@[\\w\\.]*)");
QString leftString = leftData.toString();
if(left.column() == 1 && emailPattern->indexIn(leftString) != -1)
leftString = emailPattern->cap(1);
QString rightString = rightData.toString();
if(right.column() == 1 && emailPattern->indexIn(rightString) != -1)
rightString = emailPattern->cap(1);
return QString::localeAwareCompare(leftString, rightString) < 0;
}
}
bool MySortFilterProxyModel::dateInRange(const QDate &date) const
{
return (!minDate.isValid() || date > minDate)
&& (!maxDate.isValid() || date < maxDate);
}
#ifndef WINDOW_H
#define WINDOW_H
#include <QWidget>
QT_BEGIN_NAMESPACE
class QAbstractItemModel;
class QCheckBox;
class QComboBox;
class QDateEdit;
class QGroupBox;
class QLabel;
class QLineEdit;
class QTreeView;
QT_END_NAMESPACE
class MySortFilterProxyModel;
class Window : public QWidget
{
Q_OBJECT
public:
Window();
void setSourceModel(QAbstractItemModel *model);
private slots:
void textFilterChanged();
void dateFilterChanged();
private:
MySortFilterProxyModel *proxyModel;
QGroupBox *sourceGroupBox;
QGroupBox *proxyGroupBox;
QTreeView *sourceView;
QTreeView *proxyView;
QCheckBox *filterCaseSensitivityCheckBox;
QLabel *filterPatternLabel;
QLabel *fromLabel;
QLabel *toLabel;
QLineEdit *filterPatternLineEdit;
QComboBox *filterSyntaxComboBox;
QDateEdit *fromDateEdit;
QDateEdit *toDateEdit;
};
#endif
#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);
sourceGroupBox = new QGroupBox(tr("Original Model"));
sourceGroupBox->setLayout(sourceLayout);
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(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()));
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(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);
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::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());
}
#include <QtGui>
#include "window.h"
void addMail(QAbstractItemModel *model, const QString &subject,
const QString &sender, const QDateTime &date)
{
model->insertRow(0);
model->setData(model->index(0, 0), subject);
model->setData(model->index(0, 1), sender);
model->setData(model->index(0, 2), date);
}
QAbstractItemModel *createMailModel(QObject *parent)
{
QStandardItemModel *model = new QStandardItemModel(0, 3, parent);
model->setHeaderData(0, Qt::Horizontal, QObject::tr("Subject"));
model->setHeaderData(1, Qt::Horizontal, QObject::tr("Sender"));
model->setHeaderData(2, Qt::Horizontal, QObject::tr("Date"));
addMail(model, "Happy New Year!", "Grace K. <grace@software-inc.com>",
QDateTime(QDate(2006, 12, 31), QTime(17, 03)));
addMail(model, "Radically new concept", "Grace K. <grace@software-inc.com>",
QDateTime(QDate(2006, 12, 22), QTime(9, 44)));
addMail(model, "Accounts", "pascale@nospam.com",
QDateTime(QDate(2006, 12, 31), QTime(12, 50)));
addMail(model, "Expenses", "Joe Bloggs <joe@bloggs.com>",
QDateTime(QDate(2006, 12, 25), QTime(11, 39)));
addMail(model, "Re: Expenses", "Andy <andy@nospam.com>",
QDateTime(QDate(2007, 01, 02), QTime(16, 05)));
addMail(model, "Re: Accounts", "Joe Bloggs <joe@bloggs.com>",
QDateTime(QDate(2007, 01, 03), QTime(14, 18)));
addMail(model, "Re: Accounts", "Andy <andy@nospam.com>",
QDateTime(QDate(2007, 01, 03), QTime(14, 26)));
addMail(model, "Sports", "Linda Smith <linda.smith@nospam.com>",
QDateTime(QDate(2007, 01, 05), QTime(11, 33)));
addMail(model, "AW: Sports", "Rolf Newschweinstein <rolfn@nospam.com>",
QDateTime(QDate(2007, 01, 05), QTime(12, 00)));
addMail(model, "RE: Sports", "Petra Schmidt <petras@nospam.com>",
QDateTime(QDate(2007, 01, 05), QTime(12, 01)));
return model;
}
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
Window window;
window.setSourceModel(createMailModel(&window));
window.show();
return app.exec();
}
Subclass QSortFilterProxyModel
Foundations of Qt Development\Chapter05\sorting\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* 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 APress 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.
*
*/
#include <QApplication>
#include <QTableView>
#include <QStringListModel>
#include "sortonsecondmodel.h"
int main( int argc, char **argv )
{
QApplication app( argc, argv );
QStringListModel model;
QStringList list;
list << "Totte" << "Alfons" << "Laban" << "Bamse" << "Skalman";
model.setStringList( list );
SortOnSecondModel sorter;
sorter.setSourceModel( &model );
QTableView table;
table.setModel( &sorter );
table.setSortingEnabled( true );
table.show();
return app.exec();
}
Foundations of Qt Development\Chapter05\sorting\sortonsecondmodel.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* 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 APress 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.
*
*/
#include "sortonsecondmodel.h"
SortOnSecondModel::SortOnSecondModel( QObject *parent ) : QSortFilterProxyModel( parent )
{
}
bool SortOnSecondModel::lessThan( const QModelIndex &left, const QModelIndex &right ) const
{
QString leftString = sourceModel()->data( left ).toString();
QString rightString = sourceModel()->data( right ).toString();
if( leftString.length() > 1 )
leftString = leftString.mid( 1 );
else
leftString = "";
if( rightString.length() > 1 )
rightString = rightString.mid( 1 );
else
rightString = "";
return leftString < rightString;
}
Foundations of Qt Development\Chapter05\sorting\sortonsecondmodel.h
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* 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 APress 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.
*
*/
#ifndef SORTONSECONDMODEL_H
#define SORTONSECONDMODEL_H
#include <QSortFilterProxyModel>
class SortOnSecondModel : public QSortFilterProxyModel
{
public:
SortOnSecondModel( QObject *parent = 0 );
protected:
bool lessThan( const QModelIndex &left, const QModelIndex &right ) const;
};
#endif // SORTONSECONDMODEL_H