Display properties of single item in QTableView based on selection in QTreeView

[shadowolf]

Hi,

This is my first time using PyQt. I am attempting to parse an XML file and display the hierarchy in a QTreeview and allow the user to edit the properties of a particular element in a QTableView. I have successfully parsed the XML using etree and populated a QStandardItemModel. I've been trying to figure out the QItemViewDelegate but have not had much success yet.

My issue is this: When I select an item in the QTreeView how can I update the QTableView to only display the properties of the selected element?

My other issue is I still need to figure out how to populate the attributes in the QStandardItemModel (I assume I need to add to qt.UserRole with setData, but I have not gotten that far in yet).

As an example: I want to select Tab1 in the QTreeView and in the QTableView I want to see only

Field | Value
-------------
Name | tab1
img | xyz.jpg
uid | 123

Below is my python code

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.uic import *
import xml.etree.ElementTree as ET
 
class Window(QMainWindow):
 
    def __init__(self):
        QMainWindow.__init__(self)
 
        # -- Load QT .ui file --
        self.ui = loadUi('test.ui')
        # ----
 
        # -- Display UI using QT ui layout --
        self.ui.show()
        # ----
 
        # -- Initialize data models for Treeview and Tableview
        self.modelTreeView = QStandardItemModel()
        self.modelTableView = QStandardItemModel()
        self.ui.XMLTreeView.setModel(self.modelTreeView)
        self.ui.ItemProperties.setModel(self.modelTreeView)
        # ----
 
        #UI Tree view item selection
        self.connect(self.ui.XMLTreeView.selectionModel(), SIGNAL("selectionChanged(QItemSelection, QItemSelection)"), fnXMLUpdate)  
        tree = ET.parse('test.xml')
        root = tree.getroot()
        temp = tree.findall(".//tab[@uid='123']")
        parseXML(self.modelTreeView, root)
        # ----
 
        #UI Decorations
        self.modelTreeView.setHorizontalHeaderLabels([self.tr("Object")])
        self.modelTableView.setHorizontalHeaderLabels(["Property","Value"])
        # ----
 
 
def fnXMLUpdate(current,previous):
    print("new item selected in tree view")
    index = window.ui.XMLTreeView.selectedIndexes()[0]
    print(index)
    crawler = index.model().itemFromIndex(index)
    print "Node Name: %s" % crawler.data(Qt.DisplayRole).toString()
    uid=crawler.data(Qt.UserRole).toString()
    print "Node uid: %s" % uid
 
    print("end new tree view")
 
    item = QStandardItem()
    item.setData(crawler.data(Qt.UserRole), Qt.DisplayRole)
    item.setData(crawler.data(Qt.UserRole), Qt.UserRole)
 
    window.ui.ItemProperties.setRootIndex(index)
    #window.modelTableView.setRootIndex(index)
    #window.modelTableView.appendRow(item)
    #window.modelTableView.setHorizontalHeaderLabels(["Property","Value"])
 
def parseXML(parent, node):
    for element in node:
        item = QStandardItem()
        item.setData(element.attrib.get('name'), Qt.DisplayRole)
        item.setData(element.attrib.get('uid'), Qt.UserRole)
        parseXML(item, element)
        parent.appendRow(item)
 
if __name__ == "__main__":
 
    app = QApplication(sys.argv)
    window = Window()
    sys.exit(app.exec_())

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.uic import *
import xml.etree.ElementTree as ET

class Window(QMainWindow):

    def __init__(self):
        QMainWindow.__init__(self)
        
        # -- Load QT .ui file --
        self.ui = loadUi('test.ui')
        # ----

        # -- Display UI using QT ui layout --
        self.ui.show()
        # ----

        # -- Initialize data models for Treeview and Tableview
        self.modelTreeView = QStandardItemModel()
        self.modelTableView = QStandardItemModel()
        self.ui.XMLTreeView.setModel(self.modelTreeView)
        self.ui.ItemProperties.setModel(self.modelTreeView)
        # ----

        #UI Tree view item selection
        self.connect(self.ui.XMLTreeView.selectionModel(), SIGNAL("selectionChanged(QItemSelection, QItemSelection)"), fnXMLUpdate)  
        tree = ET.parse('test.xml')
        root = tree.getroot()
        temp = tree.findall(".//tab[@uid='123']")
        parseXML(self.modelTreeView, root)
        # ----

        #UI Decorations
        self.modelTreeView.setHorizontalHeaderLabels([self.tr("Object")])
        self.modelTableView.setHorizontalHeaderLabels(["Property","Value"])
        # ----


def fnXMLUpdate(current,previous):
    print("new item selected in tree view")
    index = window.ui.XMLTreeView.selectedIndexes()[0]
    print(index)
    crawler = index.model().itemFromIndex(index)
    print "Node Name: %s" % crawler.data(Qt.DisplayRole).toString()
    uid=crawler.data(Qt.UserRole).toString()
    print "Node uid: %s" % uid

    print("end new tree view")

    item = QStandardItem()
    item.setData(crawler.data(Qt.UserRole), Qt.DisplayRole)
    item.setData(crawler.data(Qt.UserRole), Qt.UserRole)

    window.ui.ItemProperties.setRootIndex(index)
    #window.modelTableView.setRootIndex(index)
    #window.modelTableView.appendRow(item)
    #window.modelTableView.setHorizontalHeaderLabels(["Property","Value"])

def parseXML(parent, node):
    for element in node:
        item = QStandardItem()
        item.setData(element.attrib.get('name'), Qt.DisplayRole)
        item.setData(element.attrib.get('uid'), Qt.UserRole)
        parseXML(item, element)
        parent.appendRow(item)

if __name__ == "__main__":

    app = QApplication(sys.argv)
    window = Window()
    sys.exit(app.exec_())

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Attached is the XML and UI file