[PySide] simple QTableView example

[Tibold Kandrai]

  If you mean to use a QStandardItem per cell then yes.
Also for storing values that you want to display, use the Qt.DisplayRole as
role.

Cheers,
Tibold Kandrai
 ------------------------------
From: Frank Rueter | OHUfx <frank at ohufx.com>
Sent: ‎11/‎10/‎2013 14:35
To: Tibold Kandrai <kandraitibold at gmail.com>
Cc: pyside at qt-project.org
Subject: Re: [PySide] simple QTableView example

  one more silly question if I may:
So if I have a task like this:
        newTask = {'title':'new task', 'priority':1, 'status':False}

and need to store the data in one row in the model I should use three
different items, one for each value, right?!

e.g.:

        newTask = {'title':'new task', 'priority':1, 'status':False}
        row = self.model.rowCount()
        for column, attr in enumerate(['title', 'priority', 'status']):
            newItem = QtGui.QStandardItem(newTask[attr])
            self.model.setItem(row, column, newItem)

then juggle delegates or widgets to use a spin box for the integer and a
checkbox for the boolean...

Thanks for the help!

Cheers,
frank

On 10/10/13 11:44 PM, Tibold Kandrai wrote:

 Hey,

I’m not sure I understand the problem correctly.

If you want to store data in a cell or a QStandardItem, then you need to
use setData() and data().
Generally you shouldn’t need to subclass QStandardItem or
QStandardItemModel.
Here is an example how:

# Define roles
FINISHED_ROLE = QtCore.Qt.UserRole + 1
PRIORITY_ROLE = QtCore.Qt.UserRole + 2
 # Create model
model = QtGui.QStandardItemModel()
item = QtGui.QStandarItem()
model.appendRow(item)
item_index = item.index()

# Store data using the item
item.setData(finished, FINISHED_ROLE)
item.setData(priority, PRIORITY_ROLE)

 # Store data using the model
model.setData(item_index, finished, FINISHED_ROLE)
model.setData(item_index, priority, PRIORITY_ROLE)

# Retrieve data using the item
finished = item.data(FINISHED_ROLE)
priority = item.data(PRIORITY_ROLE)

# Retrieve data using the model
 finished = model.data(item_index, FINISHED_ROLE)
priority = model.data(item_index, PRIORITY_ROLE)

In some cases like click event handlers, you have the model and the item
index, there it’s easier to use the model methods instead of finding the
item and then getting the data. 😉

Hope it helps.

Cheers,
Tibold

 *From:* Frank Rueter | OHUfx
*Sent:* ‎2013‎ ‎October‎ ‎10‎, ‎Thursday ‎19‎:‎37
*To:* pyside at qt-project.org

After looking at some more examples I think my approach of storing multiple
values in one item is fundamentally flawed.
Instead I should be using one item per cell and assign the respective data,
right?!

I shall re-write the example accordingly, sorry for the noise.

frank

On 10/10/13 6:34 PM, Frank Rueter | OHUfx wrote:

I meant QTableView not QStandardTableView :/

On 10/10/13 6:33 PM, Frank Rueter | OHUfx wrote:

Hi all,

after a bit of a break from PySide I am trying to wrap my head around the
model/view stuff again and am trying to understand how a very simple
example would work where a QStandarItem has properties "title", "priority"
and "finished" which are displayed via a QStandardTableView.

I am struggling with understanding how to properly display the above three
properties in the table's columns. I tried setting the data() method on the
model like this:

*    def data(self, index, role=QtCore.Qt.DisplayRole):**
**        '''Return data based on index and role'''**
**        item = self.itemFromIndex(index)**
**        if index.column() == 0:**
**            return item.title**
**        elif index.column() == 1:**
**            return item.finished**
**        elif index.column() == 2:**
**            return item.priority*

but for some reason it errors saying item does not have attribute
"finished" even though my item object s declared like this:

*class TaskItem(QtGui.QStandardItem):**
**    '''Item to hold a task for the todo list'''**
**    **
**    def __init__(self, title, finished=False, priority=1):**
**        super(TaskItem, self).__init__(title)**
**        self.title = title**
**        self.finished = finished**
**        self.priority = priority*


When printing the item's attributes via dir() I see that, when the model is
populated, the last item it attempts to call is not my custom item object,
but something else with less attributes and methods. Clearly there is
something I haven't quite understood about this process.

Also, if I use the models data() method as pointed out above, I get
checkboxes in the cells which I don't want at this stage.

Can somebody please help me understand where I go wrong?
Attached is the whole test code.

Cheers,
frank

P.S.: I am aware that the controller code shouldn't necessarily live in the
QWidget's methods, this is just for testing which I will clean up once I
get how it all connects again


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