#!/usr/bin/env python
 
 
#############################################################################
##
## Copyright (C) 2013 Riverbank Computing Limited.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
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## This file is part of the examples of PyQt.
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##   * 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
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##   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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## $QT_END_LICENSE$
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#############################################################################
 
 
from PyQt5.QtCore import (QDir, QIODevice, QFile, QFileInfo, Qt, QTextStream,
        QUrl)
from PyQt5.QtGui import QDesktopServices
from PyQt5.QtWidgets import (QAbstractItemView, QApplication, QComboBox,
        QDialog, QFileDialog, QGridLayout, QHBoxLayout, QHeaderView, QLabel,
        QProgressDialog, QPushButton, QSizePolicy, QTableWidget,
        QTableWidgetItem)
 
 
class Window(QDialog):
    def __init__(self, parent=None):
        super(Window, self).__init__(parent)
 
        browseButton = self.createButton("&Browse...", self.browse)
        findButton = self.createButton("&Find", self.find)
 
        self.fileComboBox = self.createComboBox("*")
        self.textComboBox = self.createComboBox()
        self.directoryComboBox = self.createComboBox(QDir.currentPath())
 
        fileLabel = QLabel("Named:")
        textLabel = QLabel("Containing text:")
        directoryLabel = QLabel("In directory:")
        self.filesFoundLabel = QLabel()
 
        self.createFilesTable()
 
        buttonsLayout = QHBoxLayout()
        buttonsLayout.addStretch()
        buttonsLayout.addWidget(findButton)
 
        mainLayout = QGridLayout()
        mainLayout.addWidget(fileLabel, 0, 0)
        mainLayout.addWidget(self.fileComboBox, 0, 1, 1, 2)
        mainLayout.addWidget(textLabel, 1, 0)
        mainLayout.addWidget(self.textComboBox, 1, 1, 1, 2)
        mainLayout.addWidget(directoryLabel, 2, 0)
        mainLayout.addWidget(self.directoryComboBox, 2, 1)
        mainLayout.addWidget(browseButton, 2, 2)
        mainLayout.addWidget(self.filesTable, 3, 0, 1, 3)
        mainLayout.addWidget(self.filesFoundLabel, 4, 0)
        mainLayout.addLayout(buttonsLayout, 5, 0, 1, 3)
        self.setLayout(mainLayout)
 
        self.setWindowTitle("Find Files")
        self.resize(700, 300)
 
    def browse(self):
        directory = QFileDialog.getExistingDirectory(self, "Find Files",
                QDir.currentPath())
 
        if directory:
            if self.directoryComboBox.findText(directory) == -1:
                self.directoryComboBox.addItem(directory)
 
            self.directoryComboBox.setCurrentIndex(self.directoryComboBox.findText(directory))
 
    @staticmethod
    def updateComboBox(comboBox):
        if comboBox.findText(comboBox.currentText()) == -1:
            comboBox.addItem(comboBox.currentText())
 
    def find(self):
        self.filesTable.setRowCount(0)
 
        fileName = self.fileComboBox.currentText()
        text = self.textComboBox.currentText()
        path = self.directoryComboBox.currentText()
 
        self.updateComboBox(self.fileComboBox)
        self.updateComboBox(self.textComboBox)
        self.updateComboBox(self.directoryComboBox)
 
        self.currentDir = QDir(path)
        if not fileName:
            fileName = "*"
        files = self.currentDir.entryList([fileName],
                QDir.Files | QDir.NoSymLinks)
 
        if text:
            files = self.findFiles(files, text)
        self.showFiles(files)
 
    def findFiles(self, files, text):
        progressDialog = QProgressDialog(self)
 
        progressDialog.setCancelButtonText("&Cancel")
        progressDialog.setRange(0, files.count())
        progressDialog.setWindowTitle("Find Files")
 
        foundFiles = []
 
        for i in range(files.count()):
            progressDialog.setValue(i)
            progressDialog.setLabelText("Searching file number %d of %d..." % (i, files.count()))
            QApplication.processEvents()
 
            if progressDialog.wasCanceled():
                break
 
            inFile = QFile(self.currentDir.absoluteFilePath(files[i]))
 
            if inFile.open(QIODevice.ReadOnly):
                stream = QTextStream(inFile)
                while not stream.atEnd():
                    if progressDialog.wasCanceled():
                        break
                    line = stream.readLine()
                    if text in line:
                        foundFiles.append(files[i])
                        break
 
        progressDialog.close()
 
        return foundFiles
 
    def showFiles(self, files):
        for fn in files:
            file = QFile(self.currentDir.absoluteFilePath(fn))
            size = QFileInfo(file).size()
 
            fileNameItem = QTableWidgetItem(fn)
            fileNameItem.setFlags(fileNameItem.flags() ^ Qt.ItemIsEditable)
            sizeItem = QTableWidgetItem("%d KB" % (int((size + 1023) / 1024)))
            sizeItem.setTextAlignment(Qt.AlignVCenter | Qt.AlignRight)
            sizeItem.setFlags(sizeItem.flags() ^ Qt.ItemIsEditable)
 
            row = self.filesTable.rowCount()
            self.filesTable.insertRow(row)
            self.filesTable.setItem(row, 0, fileNameItem)
            self.filesTable.setItem(row, 1, sizeItem)
 
        self.filesFoundLabel.setText("%d file(s) found (Double click on a file to open it)" % len(files))
 
    def createButton(self, text, member):
        button = QPushButton(text)
        button.clicked.connect(member)
        return button
 
    def createComboBox(self, text=""):
        comboBox = QComboBox()
        comboBox.setEditable(True)
        comboBox.addItem(text)
        comboBox.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred)
        return comboBox
 
    def createFilesTable(self):
        self.filesTable = QTableWidget(0, 2)
        self.filesTable.setSelectionBehavior(QAbstractItemView.SelectRows)
 
        self.filesTable.setHorizontalHeaderLabels(("File Name", "Size"))
        self.filesTable.horizontalHeader().setSectionResizeMode(0, QHeaderView.Stretch)
        self.filesTable.verticalHeader().hide()
        self.filesTable.setShowGrid(False)
 
        self.filesTable.cellActivated.connect(self.openFileOfItem)
 
    def openFileOfItem(self, row, column):
        item = self.filesTable.item(row, 0)
 
        QDesktopServices.openUrl(QUrl(self.currentDir.absoluteFilePath(item.text())))
 
 
if __name__ == '__main__':
 
    import sys
 
    app = QApplication(sys.argv)
    window = Window()
    window.show()
    sys.exit(app.exec_())