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#!/usr/bin/env python
#############################################################################
##
## Copyright (C) 2013 Riverbank Computing Limited.
## 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."
## $QT_END_LICENSE$
##
#############################################################################
from PyQt5.QtCore import QAbstractItemModel, QFile, QIODevice, QModelIndex, Qt
from PyQt5.QtWidgets import QApplication, QFileDialog, QMainWindow, QTreeView
from PyQt5.QtXml import QDomDocument
class DomItem(object):
def __init__(self, node, row, parent=None):
self.domNode = node
# Record the item's location within its parent.
self.rowNumber = row
self.parentItem = parent
self.childItems = {}
def node(self):
return self.domNode
def parent(self):
return self.parentItem
def child(self, i):
if i in self.childItems:
return self.childItems[i]
if i >= 0 and i < self.domNode.childNodes().count():
childNode = self.domNode.childNodes().item(i)
childItem = DomItem(childNode, i, self)
self.childItems[i] = childItem
return childItem
return None
def row(self):
return self.rowNumber
class DomModel(QAbstractItemModel):
def __init__(self, document, parent=None):
super(DomModel, self).__init__(parent)
self.domDocument = document
self.rootItem = DomItem(self.domDocument, 0)
def columnCount(self, parent):
return 3
def data(self, index, role):
if not index.isValid():
return None
if role != Qt.DisplayRole:
return None
item = index.internalPointer()
node = item.node()
attributes = []
attributeMap = node.attributes()
if index.column() == 0:
return node.nodeName()
elif index.column() == 1:
for i in range(0, attributeMap.count()):
attribute = attributeMap.item(i)
attributes.append(attribute.nodeName() + '="' +
attribute.nodeValue() + '"')
return " ".join(attributes)
if index.column() == 2:
value = node.nodeValue()
if value is None:
return ''
return ' '.join(node.nodeValue().split('\n'))
return None
def flags(self, index):
if not index.isValid():
return Qt.NoItemFlags
return Qt.ItemIsEnabled | Qt.ItemIsSelectable
def headerData(self, section, orientation, role):
if orientation == Qt.Horizontal and role == Qt.DisplayRole:
if section == 0:
return "Name"
if section == 1:
return "Attributes"
if section == 2:
return "Value"
return None
def index(self, row, column, parent):
if not self.hasIndex(row, column, parent):
return QModelIndex()
if not parent.isValid():
parentItem = self.rootItem
else:
parentItem = parent.internalPointer()
childItem = parentItem.child(row)
if childItem:
return self.createIndex(row, column, childItem)
else:
return QModelIndex()
def parent(self, child):
if not child.isValid():
return QModelIndex()
childItem = child.internalPointer()
parentItem = childItem.parent()
if not parentItem or parentItem == self.rootItem:
return QModelIndex()
return self.createIndex(parentItem.row(), 0, parentItem)
def rowCount(self, parent):
if parent.column() > 0:
return 0
if not parent.isValid():
parentItem = self.rootItem
else:
parentItem = parent.internalPointer()
return parentItem.node().childNodes().count()
class MainWindow(QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.fileMenu = self.menuBar().addMenu("&File")
self.fileMenu.addAction("&Open...", self.openFile, "Ctrl+O")
self.fileMenu.addAction("E&xit", self.close, "Ctrl+Q")
self.xmlPath = ""
self.model = DomModel(QDomDocument(), self)
self.view = QTreeView(self)
self.view.setModel(self.model)
self.setCentralWidget(self.view)
self.setWindowTitle("Simple DOM Model")
def openFile(self):
filePath, _ = QFileDialog.getOpenFileName(self, "Open File",
self.xmlPath, "XML files (*.xml);;HTML files (*.html);;"
"SVG files (*.svg);;User Interface files (*.ui)")
if filePath:
f = QFile(filePath)
if f.open(QIODevice.ReadOnly):
document = QDomDocument()
if document.setContent(f):
newModel = DomModel(document, self)
self.view.setModel(newModel)
self.model = newModel
self.xmlPath = filePath
f.close()
if __name__ == '__main__':
import sys
app = QApplication(sys.argv)
window = MainWindow()
window.resize(640, 480)
window.show()
sys.exit(app.exec_())
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