#!/usr/bin/env python


#############################################################################
##
## Copyright (C) 2010 Hans-Peter Jansen <hpj@urpla.net>.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
##
## This file is part of the examples of PyQt.
##
## $QT_BEGIN_LICENSE:BSD$
## 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.
##   * Neither the name of Nokia Corporation and its Subsidiary(-ies) 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."
## $QT_END_LICENSE$
##
#############################################################################


# This is only needed for Python v2 but is harmless for Python v3.
import sip
sip.setapi('QVariant', 2)

from PyQt4 import QtCore, QtGui


class MySortFilterProxyModel(QtGui.QSortFilterProxyModel):
    def __init__(self, parent=None):
        super(MySortFilterProxyModel, self).__init__(parent)

        self.minDate = QtCore.QDate()
        self.maxDate = QtCore.QDate()

    def setFilterMinimumDate(self, date):
        self.minDate = date
        self.invalidateFilter()

    def filterMinimumDate(self):
        return self.minDate

    def setFilterMaximumDate(self, date):
        self.maxDate = date
        self.invalidateFilter()
 
    def filterMaximumDate(self):
        return self.maxDate

    def filterAcceptsRow(self, sourceRow, sourceParent):
        index0 = self.sourceModel().index(sourceRow, 0, sourceParent)
        index1 = self.sourceModel().index(sourceRow, 1, sourceParent)
        index2 = self.sourceModel().index(sourceRow, 2, sourceParent)

        return (   (self.filterRegExp().indexIn(self.sourceModel().data(index0)) >= 0
                    or self.filterRegExp().indexIn(self.sourceModel().data(index1)) >= 0)
                and self.dateInRange(self.sourceModel().data(index2)))

    def lessThan(self, left, right):
        leftData = self.sourceModel().data(left)
        rightData = self.sourceModel().data(right)

        if not isinstance(leftData, QtCore.QDate):
            emailPattern = QtCore.QRegExp("([\\w\\.]*@[\\w\\.]*)")

            if left.column() == 1 and emailPattern.indexIn(leftData) != -1:
                leftData = emailPattern.cap(1)

            if right.column() == 1 and emailPattern.indexIn(rightData) != -1:
                rightData = emailPattern.cap(1)

        return leftData < rightData

    def dateInRange(self, date):
        if isinstance(date, QtCore.QDateTime):
            date = date.date()

        return (    (not self.minDate.isValid() or date >= self.minDate)
                and (not self.maxDate.isValid() or date <= self.maxDate))


class Window(QtGui.QWidget):
    def __init__(self):
        super(Window, self).__init__()

        self.proxyModel = MySortFilterProxyModel(self)
        self.proxyModel.setDynamicSortFilter(True)

        self.sourceView = QtGui.QTreeView()
        self.sourceView.setRootIsDecorated(False)
        self.sourceView.setAlternatingRowColors(True)

        sourceLayout = QtGui.QHBoxLayout()
        sourceLayout.addWidget(self.sourceView)
        sourceGroupBox = QtGui.QGroupBox("Original Model")
        sourceGroupBox.setLayout(sourceLayout)

        self.filterCaseSensitivityCheckBox = QtGui.QCheckBox("Case sensitive filter")
        self.filterCaseSensitivityCheckBox.setChecked(True)
        self.filterPatternLineEdit = QtGui.QLineEdit()
        self.filterPatternLineEdit.setText("Grace|Sports")
        filterPatternLabel = QtGui.QLabel("&Filter pattern:")
        filterPatternLabel.setBuddy(self.filterPatternLineEdit)
        self.filterSyntaxComboBox = QtGui.QComboBox()
        self.filterSyntaxComboBox.addItem("Regular expression", QtCore.QRegExp.RegExp)
        self.filterSyntaxComboBox.addItem("Wildcard", QtCore.QRegExp.Wildcard)
        self.filterSyntaxComboBox.addItem("Fixed string", QtCore.QRegExp.FixedString)
        self.fromDateEdit = QtGui.QDateEdit()
        self.fromDateEdit.setDate(QtCore.QDate(2006, 12, 22))
        self.fromDateEdit.setCalendarPopup(True)
        fromLabel = QtGui.QLabel("F&rom:")
        fromLabel.setBuddy(self.fromDateEdit)
        self.toDateEdit = QtGui.QDateEdit()
        self.toDateEdit.setDate(QtCore.QDate(2007, 1, 5))
        self.toDateEdit.setCalendarPopup(True)
        toLabel = QtGui.QLabel("&To:")
        toLabel.setBuddy(self.toDateEdit)

        self.filterPatternLineEdit.textChanged.connect(self.textFilterChanged)
        self.filterSyntaxComboBox.currentIndexChanged.connect(self.textFilterChanged)
        self.filterCaseSensitivityCheckBox.toggled.connect(self.textFilterChanged)
        self.fromDateEdit.dateChanged.connect(self.dateFilterChanged)
        self.toDateEdit.dateChanged.connect(self.dateFilterChanged)

        self.proxyView = QtGui.QTreeView()
        self.proxyView.setRootIsDecorated(False)
        self.proxyView.setAlternatingRowColors(True)
        self.proxyView.setModel(self.proxyModel)
        self.proxyView.setSortingEnabled(True)
        self.proxyView.sortByColumn(1, QtCore.Qt.AscendingOrder)

        self.textFilterChanged()
        self.dateFilterChanged()

        proxyLayout = QtGui.QGridLayout()
        proxyLayout.addWidget(self.proxyView, 0, 0, 1, 3)
        proxyLayout.addWidget(filterPatternLabel, 1, 0)
        proxyLayout.addWidget(self.filterPatternLineEdit, 1, 1)
        proxyLayout.addWidget(self.filterSyntaxComboBox, 1, 2)
        proxyLayout.addWidget(self.filterCaseSensitivityCheckBox, 2, 0, 1, 3)
        proxyLayout.addWidget(fromLabel, 3, 0)
        proxyLayout.addWidget(self.fromDateEdit, 3, 1, 1, 2)
        proxyLayout.addWidget(toLabel, 4, 0)
        proxyLayout.addWidget(self.toDateEdit, 4, 1, 1, 2)
        proxyGroupBox = QtGui.QGroupBox("Sorted/Filtered Model")
        proxyGroupBox.setLayout(proxyLayout)

        mainLayout = QtGui.QVBoxLayout()
        mainLayout.addWidget(sourceGroupBox)
        mainLayout.addWidget(proxyGroupBox)
        self.setLayout(mainLayout)

        self.setWindowTitle("Custom Sort/Filter Model")
        self.resize(500, 450)

    def setSourceModel(self, model):
        self.proxyModel.setSourceModel(model)
        self.sourceView.setModel(model)

    def textFilterChanged(self):
        syntax = QtCore.QRegExp.PatternSyntax(
            self.filterSyntaxComboBox.itemData(
                self.filterSyntaxComboBox.currentIndex()))
        caseSensitivity = (
            self.filterCaseSensitivityCheckBox.isChecked()
            and QtCore.Qt.CaseSensitive or QtCore.Qt.CaseInsensitive)
        regExp = QtCore.QRegExp(self.filterPatternLineEdit.text(), caseSensitivity, syntax)
        self.proxyModel.setFilterRegExp(regExp)

    def dateFilterChanged(self):
        self.proxyModel.setFilterMinimumDate(self.fromDateEdit.date())
        self.proxyModel.setFilterMaximumDate(self.toDateEdit.date())


def addMail(model, subject, sender, 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)


def createMailModel(parent):
    model = QtGui.QStandardItemModel(0, 3, parent)

    model.setHeaderData(0, QtCore.Qt.Horizontal, "Subject")
    model.setHeaderData(1, QtCore.Qt.Horizontal, "Sender")
    model.setHeaderData(2, QtCore.Qt.Horizontal, "Date")

    addMail(model, "Happy New Year!", "Grace K. <grace@software-inc.com>",
            QtCore.QDateTime(QtCore.QDate(2006, 12, 31), QtCore.QTime(17, 3)))
    addMail(model, "Radically new concept", "Grace K. <grace@software-inc.com>",
            QtCore.QDateTime(QtCore.QDate(2006, 12, 22), QtCore.QTime(9, 44)))
    addMail(model, "Accounts", "pascale@nospam.com",
            QtCore.QDateTime(QtCore.QDate(2006, 12, 31), QtCore.QTime(12, 50)))
    addMail(model, "Expenses", "Joe Bloggs <joe@bloggs.com>",
            QtCore.QDateTime(QtCore.QDate(2006, 12, 25), QtCore.QTime(11, 39)))
    addMail(model, "Re: Expenses", "Andy <andy@nospam.com>",
            QtCore.QDateTime(QtCore.QDate(2007, 1, 2), QtCore.QTime(16, 5)))
    addMail(model, "Re: Accounts", "Joe Bloggs <joe@bloggs.com>",
            QtCore.QDateTime(QtCore.QDate(2007, 1, 3), QtCore.QTime(14, 18)))
    addMail(model, "Re: Accounts", "Andy <andy@nospam.com>",
            QtCore.QDateTime(QtCore.QDate(2007, 1, 3), QtCore.QTime(14, 26)))
    addMail(model, "Sports", "Linda Smith <linda.smith@nospam.com>",
            QtCore.QDateTime(QtCore.QDate(2007, 1, 5), QtCore.QTime(11, 33)))
    addMail(model, "AW: Sports", "Rolf Newschweinstein <rolfn@nospam.com>",
            QtCore.QDateTime(QtCore.QDate(2007, 1, 5), QtCore.QTime(12, 0)))
    addMail(model, "RE: Sports", "Petra Schmidt <petras@nospam.com>",
            QtCore.QDateTime(QtCore.QDate(2007, 1, 5), QtCore.QTime(12, 1)))

    return model


if __name__ == "__main__":

    import sys

    app = QtGui.QApplication(sys.argv)

    window = Window()
    window.setSourceModel(createMailModel(window))
    window.show()

    sys.exit(app.exec_())