CODEWITHSUNDEEP
listviewpygtk
Biggie
Biggie

Reputation: 7067

pygtk - questions about ListViews: update/appending values

i have some general questions about using ListViews and ListStores etc..

My program contains a ToDo-list which is a list of Task-objects. A Task-object has two attributes: title and progress. Now i want to display these ToDo-list in a ListView showing the title of the task in the first column and the progress in the second column.

So i could create a ListView with two TreeViewColumns, each with a CellRendererText and a data function (set_cell_data_func) to set the appropriate column-text (title- or progress-attribute of the Task-object).

Of course, the progress of a task can change over time in another thread. So the progress-cells should be updated to show the new value. But how can i tell the ListView that the Task-object has changed and the view should be updated?

And what is the simplest way to keep track of list-changes? For example a new Task-object is added to the ToDo-list. Do i need to append the new added Task-object to the ListStore by myself or is there an easier way? ... because i would have two lists: the original ToDo-list and the ListStore which seems to be unnecessary.

So what is the best/simplest/easiest way to show my ToDo-list in a ListView? :-)

Best regards,
Biggie

Upvotes: 0

Views: 403

Answers (1)

serge_gubenko
serge_gubenko

Reputation: 20492

I would rather use gtk.ListStore as your list model and primary\only "TODO list" data source , once you change values in the model, your list view content should be updated, smth like this:

# get first row of the list store
iter = self.model.get_iter_first()
# set new values to the first column
self.model.set_value(iter, 1, 'new value')
# set new values to columns 0 and 1
self.model.set(iter, 0, 'new 0', 1, 'new 1')

if you need to track changes for your model fields, connect to the "row-changed" signal:

self.model.connect("row-changed", self.on_model_changed, 0)
...   
def on_model_changed(self, treemodel, path, iter, user_param1):
    print 'model_changed ' + treemodel.get_value(iter, 0)

hope this helps, regards

Upvotes: 1

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