Hello Jun!
As other suggested, model.rowsInserted(parent, start, end).emit() is the
signal you need. To show you the way one could do this, I shortly
changed the Simple Tree View example of PySide (quick and dirty, I know,
but it shows enough)... You may add new items filling in the LineEdits
and then clicking the button. The only magic line is the last one of the
method TreeModel.addData().
Hope this helps (and for the future, it would be probably a good idea to
change the treeview example of PySide to make it ready for use with
dynamic models...).
Code:
# -*- coding: utf-8 -*-
'''
@author: Aaron Richiger
@contact: [email protected]
@date: 08.02.2011
'''
from PySide.QtGui import *
from PySide.QtCore import *
import sys
class TreeItem(object):
def __init__(self, data, parent=None):
self.parentItem = parent
self.itemData = data
self.childItems = []
def appendChild(self, item):
self.childItems.append(item)
def child(self, row):
return self.childItems[row]
def childCount(self):
return len(self.childItems)
def columnCount(self):
return len(self.itemData)
def data(self, column):
try:
return self.itemData[column]
except IndexError:
return None
def parent(self):
return self.parentItem
def row(self):
if self.parentItem:
return self.parentItem.childItems.index(self)
return 0
class TreeModel(QAbstractItemModel):
def __init__(self, rootItem, parent=None):
super(TreeModel, self).__init__(parent)
self.rootItem = rootItem
def columnCount(self, parent = QModelIndex()):
if parent.isValid():
return parent.internalPointer().columnCount()
else:
return self.rootItem.columnCount()
def data(self, index, role):
if not index.isValid():
return None
if role != Qt.DisplayRole:
return None
item = index.internalPointer()
return item.data(index.column())
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:
return self.rootItem.data(section)
return None
def index(self, row, column, parent = QModelIndex()):
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, index):
if not index.isValid():
return QModelIndex()
childItem = index.internalPointer()
parentItem = childItem.parent()
if parentItem == self.rootItem:
return QModelIndex()
return self.createIndex(parentItem.row(), 0, parentItem)
def rowCount(self, parent = QModelIndex()):
if parent.column() > 0:
return 0
if not parent.isValid():
parentItem = self.rootItem
else:
parentItem = parent.internalPointer()
return parentItem.childCount()
def addData(self, data, parent):
lines = data.split('\n')
parents = [parent]
indentations = [0]
number = 0
while number < len(lines):
position = 0
while position < len(lines[number]):
if lines[number][position] != ' ':
break
position += 1
lineData = lines[number][position:].strip()
if lineData:
# Read the column data from the rest of the line.
columnData = [s.strip() for s in lineData.split(';') if s]
if position > indentations[-1]:
# The last child of the current parent is now the new
# parent unless the current parent has no children.
if parents[-1].childCount() > 0:
parents.append(parents[-1].child(parents[-1].childCount() - 1))
indentations.append(position)
else:
while position < indentations[-1] and len(parents) > 0:
parents.pop()
indentations.pop()
# Append a new item to the current parent's list of
children.
parents[-1].appendChild(TreeItem(columnData, parents[-1]))
number += 1
self.rowsInserted.emit(self, self.rowCount() - 1,
self.rowCount() - 1)
if __name__ == '__main__':
app = QApplication(sys.argv)
widget = QWidget()
data = '''
Getting Started; How to familiarize yourself with Qt Designer
Launching Designer; Running the Qt Designer application
The User Interface; How to interact with Qt Designer
Designing a Component; Creating a GUI for your application
Creating a Dialog; How to create a dialog
Composing the Dialog; Putting widgets into the dialog example'''
rootItem = TreeItem(("Title", "Summary"))
model = TreeModel(rootItem)
model.addData(data, rootItem)
treeView = QTreeView(widget)
treeView.setModel(model)
lbTitle = QLabel('Title:', widget)
lbSummary = QLabel('Summary:', widget)
leTitle = QLineEdit(widget)
leSummary = QLineEdit(widget)
pbAddItem = QPushButton('Add this item', widget)
pbAddItem.clicked.connect(lambda: model.addData(leTitle.text() +
';' + leSummary.text(), model.rootItem))
grid = QGridLayout(widget)
grid.addWidget(treeView, 0, 0, 1, 2)
grid.addWidget(lbTitle, 1, 0, 1, 1)
grid.addWidget(lbSummary, 2, 0, 1, 1)
grid.addWidget(leTitle, 1, 1, 1, 1)
grid.addWidget(leSummary, 2, 1, 1, 1)
grid.addWidget(pbAddItem, 3, 1, 1, 1)
widget.show()
sys.exit(app.exec_())
Am 07.02.2012 13:47, schrieb Daniele Esposti:
Hi Jun,
update(QModelIndex) is a slot in QAbstractItemView (and which is the
superclass of QTreeView); QAbstractItemModel doesn't have any update()
method at all.
What you can do (as far as I know about your code) is to emit a
rowsAboutToBeInserted() before adding the data to your model and
rowsInserted() after the data is added to your model. The view
connected to your model will show your data automatically.
On 7 February 2012 11:23, Jun Koi<[email protected]> wrote:
On Tue, Feb 7, 2012 at 7:08 PM, Daniele Esposti<[email protected]> wrote:
Hi Jun,
the slot QAbstractItemView.update() wants a QModelIndex as a parameter
http://www.pyside.org/docs/pyside/PySide/QtGui/QAbstractItemView.html#PySide.QtGui.PySide.QtGui.QAbstractItemView.update
This means you need to pass the QModelIndex of the data you added to the model.
this means i need to call update() method of the model, right?
how about the update() method of the TreeView widget? do i need to call it?
thanks a lot,
Jun
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