PYGTK : Dynamically adding Items to CellRendererCombo

anish.george · **Joined:** Fri Aug 24, 2012 11:49 am **Posts:** 3

I am trying add items to CellRendererCombo dynamically. See the code below. The second column is combobox. When I click on 'Samsung' the corresponding items is listed in the combo box. Now the problem is, when I click 'LG', the items corresponds to 'Samsung' is listed. In short, the combobox is showing Items for the previously selected key, not for the current key.

How to solve this Issue??? Thanks in advance. :)

Code:

    #!/usr/bin/env python

    import gtk,os

    class CellRendererCombo:
        def __init__(self):
            window = gtk.Window()
            window.set_default_size(200, 200)

            liststore_hardware = gtk.ListStore(str, str)
            liststore_hardware.append(["Television", "Samsung"])
            liststore_hardware.append(["Mobile Phone", "LG"])
            liststore_hardware.append(["DVD Player", "Sony"])

            treeview = gtk.TreeView(liststore_hardware)
            column_text = gtk.TreeViewColumn("Text")
            column_combo = gtk.TreeViewColumn("Combo")
            treeview.append_column(column_text)
            treeview.append_column(column_combo)

            cellrenderer_text = gtk.CellRendererText()
            column_text.pack_start(cellrenderer_text, False)
            column_text.add_attribute(cellrenderer_text, "text", 0)

            self.cellrenderer_combo = gtk.CellRendererCombo()
            self.cellrenderer_combo.set_property("editable", True)

            self.cellrenderer_combo.set_property("text-column", 0)
            column_combo.pack_start(self.cellrenderer_combo, False)
            column_combo.add_attribute(self.cellrenderer_combo, "text", 1)

            window.connect("destroy", lambda w: gtk.main_quit())
            self.cellrenderer_combo.connect("editing-started", self.populate_combo)
            self.cellrenderer_combo.connect("edited", self.combo_changed, liststore_hardware)

            window.add(treeview)
            window.show_all()

        def combo_changed(self, widget, path, text, model):
            model[path][1] = text

        def populate_combo(self,*args):
            liststore_manufacturers = gtk.ListStore(str)
            manufacturers={}
            manufacturers['Samsung'] = ["Samsung", "Item1","Item2", "Item3", "Item4"]
            manufacturers['LG'] = ["LG", "Item5", "Item6", "Item7", "Item8", "Item9",'Item10']
            manufacturers['Sony'] = ["Sony", "Item11", "Item12", "Item13", "Item14", "Item15",'Item16']

            catgry=self.cellrenderer_combo.get_property ("text") # read the content of combobox

            for item in manufacturers[catgry]:
                liststore_manufacturers.append([item])
            self.cellrenderer_combo.set_property("model", liststore_manufacturers)

    #        
    CellRendererCombo()
    gtk.main()

tadeboro · **Posted:** Fri Aug 24, 2012 12:37 pm

Hello and welcome to the GTK+ forums!

You're having troubles because model on combo box that pops-up is set before GtkCellEditable::editing-started signal is emitted. So when you set model in editing started handler, you set it for the next time combo box is popped-up.

Why don't you simply store your models on a per-row basis and simply let the property binding machinery do all the work for you?

Cheers,
Tadej

anish.george · **Joined:** Fri Aug 24, 2012 11:49 am **Posts:** 3

Hello tadeboro,

Thank you for the replay.

Can you be more specific about the point "store your models on a per-row basis and simply let the property binding machinery do all the work for you".

tadeboro · **Posted:** Tue Aug 28, 2012 2:19 pm

Hi.

I meant something like this:

Code:

#!/usr/bin/env python

import gtk,os

class CellRendererCombo:
    def __init__(self):
        window = gtk.Window()
        window.set_default_size(200, 200)

        liststore_hardware = gtk.ListStore(str, str, gtk.TreeModel)

        items = (("Television", ("Samsung", "Item11", "Item12")),
                 ("Mobile Phone", ("LG", "Item21", "Item22")),
                 ("DVD Player", ("Sony", "Item31", "Item32")))

        for item in items:
            store = gtk.ListStore(str)
            for i in item[1]:
                iter = store.append([i])
            liststore_hardware.append([item[0], item[1][0], store])

        treeview = gtk.TreeView(liststore_hardware)
        column_text = gtk.TreeViewColumn("Text")
        column_combo = gtk.TreeViewColumn("Combo")
        treeview.append_column(column_text)
        treeview.append_column(column_combo)

        cellrenderer_text = gtk.CellRendererText()
        column_text.pack_start(cellrenderer_text, False)
        column_text.add_attribute(cellrenderer_text, "text", 0)

        self.cellrenderer_combo = gtk.CellRendererCombo()
        self.cellrenderer_combo.set_property("editable", True)
        self.cellrenderer_combo.set_property("text-column", 0)
        column_combo.pack_start(self.cellrenderer_combo, False)
        column_combo.add_attribute(self.cellrenderer_combo, "text", 1)
        column_combo.add_attribute(self.cellrenderer_combo, "model", 2)

        window.connect("destroy", lambda w: gtk.main_quit())
        self.cellrenderer_combo.connect("edited", self.combo_changed, liststore_hardware)

        window.add(treeview)
        window.show_all()

    def combo_changed(self, widget, path, text, model):
        model[path][1] = text

#       
CellRendererCombo()
gtk.main()

Tadej

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