How to select item programmatically in GtkComboBox (Python)?

[estiedi]

Hi,

I'm working on a program using Quickly, Python & Glade.

I made a Master/Detail window:
The master part is a TreeView with a list of persons (ID, firstname, name).
The detail part a frame with several widgets (mostly entry, combobox).

When the user selects a person in the master list, I display the persons details in the details frame to view and/or edit.

In the details frame I have a combo box with zip codes.
I need to set the zip code of the selected person programmatically, but couldn't find a function in gtk.ComboBox or gtk.TreeModel that lets me do this easily.

My solution is to keep a separate list of zip codes through which I loop to find the index of the zip code I need and then use the combobox's set_active(index) function.

This is the treeview event handler when the user selects another person:


def on_treeview1_cursor_changed(self, widget):
model, it, = widget.get_selection().get_selected()
val = model.get_value(it, 0)
self.show_member_detail(val)
The function that fills the detail frame with the selected person's details:


def show_member_detail(self, member_nr):
mbr = get_store().find(Member, Member.member_nr == member_nr).one()
self.builder.get_object('entry_firstname').set_tex t(mbr.firstname)
self.builder.get_object('entry_name').set_text(mbr .name)
combo_pc = self.builder.get_object('combobox_zipcode')
combo_pc.set_active(get_zipcode_index(mbr.place.zi pcode))
self.builder.get_object('entry_address').set_text( mbr.address)
self.builder.get_object('entry_email').set_text(li d.email)
self.builder.get_object('entry_tel1').set_text(lid .tel1)
self.builder.get_object('entry_tel2').set_text(lid .tel2)
This is the function that tries to find the index of the zip code


def get_zipcode_index(zipcode):
places = get_store().find(Places)
for zc in places:
idx = idx + 1
if zc.zipcode == zipcode
return idx
Is there any better way to do this? I could not find any hint on Google about this, so maybe I heading in the complete wrong direction.

Thx.

[StephenF]

To implement the interface you describe I would create a gtk.TreeRowReference for each zip code in the ComboBox. These references will go as the values of a dictionary so that a simple dictionary lookup of the currently set zip code can be used to obtain the TreeRowReference that tracks the ComboBox zip code.

Then the code would look something like


my_combo_box.set_active(my_dict[zip_code].get_path()[0])

[km0r3]

def get_zipcode_index(zipcode):
places = get_store().find(Places)
for zc in places:
idx = idx + 1
if zc.zipcode == zipcode
return idx
Is there any better way to do this? I could not find any hint on Google about this, so maybe I heading in the complete wrong direction.

Thx.

I recently had to do some searching over a GtkListStore and the approach is similar to yours. I have also done a lot of research on Google, but, just like you, I haven't found a lot of useful sites on the topic.

Personally, I think you're code is "a good way to do this".

Though, there's one blog talking about Quickly projects (http://theravingrick.blogspot.com/) and I found a code snippet which you might consider useful:


def __new_filter_row(self, widget, data=None):
"""
new_filter row - hack to allow naming of columns
in a grid filter.

This code works around:
https://bugs.edge.launchpad.net/quidgets/+bug/587558

"""

row = self.filt.rows[len(self.filt.rows)-1]
row.connect("add_row_requested",self.__new_filter_row)
model = row.column_combo.get_model()

for i, k in enumerate(model):
itr = model.get_iter(i)
title = model.get_value(itr,0)
if title == "name":
model.set_value(itr,0,_("Name"))
elif title == "priority":
model.set_value(itr,0,_("Priority"))
elif title == "due":
model.set_value(itr,0,_("Due"))
elif title == "project":
model.set_value(itr,0,_("Project"))
if title == "complete?":
model.set_value(itr,0,_("Completed"))

P.S.: The blog I've linked to earlier is a really useful resource in my humble opinion.

[estiedi]

Thanks a lot, StephenF and km0r3.

I somehow missed the TreeRowReference class and the blog really looks great. I'm going to dig those deeper.

@km0r3:
I want to avoid looping through all the zip codes. As you can imagine there are many zip codes and the user might switch between persons a lot, so this could be a potential performance bummer. :???:
Even thinking whether a combobox is a good idea for zip codes after all.

Many thanks for helping me finding the way.

Estiedi