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# Copyright (c) 2003-2005 Ruby-GNOME2 Project Team
# This program is licenced under the same licence as Ruby-GNOME2.
#
# $Id: editable_cells.rb,v 1.7 2005/02/06 18:25:13 kzys Exp $
=begin
= Tree View/Editable Cells
This demo demonstrates the use of editable cells in a Gtk::TreeView. If
you're new to the Gtk::TreeView widgets and associates, look into
the Gtk::ListStore example first.
=end
require 'common'
module Demo
class EditableCells < BasicWindow
Item = Struct.new('Item', :number, :product, :editable)
COLUMN_NUMBER, COLUMN_PRODUCT, COLUMN_EDITABLE, NUM_COLUMNS = *(0..4).to_a
def initialize
super('Shopping list')
self.border_width = 5
vbox = Gtk::VBox.new(false, 5)
add(vbox)
vbox.pack_start(Gtk::Label.new('Shopping list (you can edit the cells!)'),
false, false, 0)
sw = Gtk::ScrolledWindow.new
sw.shadow_type = Gtk::SHADOW_ETCHED_IN
sw.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC)
vbox.pack_start(sw, true, true, 0)
# create model
model = create_model
# create tree view
treeview = Gtk::TreeView.new(model)
treeview.rules_hint = true
treeview.selection.mode = Gtk::SELECTION_SINGLE
add_columns(treeview)
sw.add(treeview)
# some buttons
hbox = Gtk::HBox.new(true, 4)
vbox.pack_start(hbox, false, false, 0)
button = Gtk::Button.new('Add item')
button.signal_connect('clicked') do
add_item(model)
end
hbox.pack_start(button, true, true, 0)
button = Gtk::Button.new('Remove item')
button.signal_connect('clicked') do
remove_item(treeview)
end
hbox.pack_start(button, true, true, 0)
set_default_size(320, 200)
end
def create_model
# create array
@articles = []
add_items
# create list store
model = Gtk::ListStore.new(Integer, String, TrueClass)
# add items
@articles.each do |article|
iter = model.append
article.each_with_index do |value, index|
iter.set_value(index, value)
end
end
return model
end
def add_items
item = Item.new(3, 'bottles of coke', true)
@articles.push(item)
item = Item.new(5, 'packages of noodles', true)
@articles.push(item)
item = Item.new(2, 'packages of chocolate chip cookies', true)
@articles.push(item)
item = Item.new(1, 'can vanilla ice cream', true)
@articles.push(item)
item = Item.new(6, 'eggs', true)
@articles.push(item)
end
def add_columns(treeview)
model = treeview.model
# number column
renderer = Gtk::CellRendererText.new
renderer.signal_connect('edited') do |*args|
cell_edited(*args.push(model))
end
treeview.insert_column(-1, 'Number', renderer,
{
:text => COLUMN_NUMBER,
:editable => COLUMN_EDITABLE,
})
def renderer.column
COLUMN_NUMBER
end
# product column
renderer = Gtk::CellRendererText.new
renderer.signal_connect('edited') do |*args|
cell_edited(*args.push(model))
end
def renderer.column
COLUMN_PRODUCT
end
treeview.insert_column(-1, 'Product', renderer,
{
:text => COLUMN_PRODUCT,
:editable => COLUMN_EDITABLE,
})
end
def cell_edited(cell, path_string, new_text, model)
path = Gtk::TreePath.new(path_string)
column = cell.column
iter = model.get_iter(path)
case column
when COLUMN_NUMBER
i = iter.path.indices[0]
@articles[i].number = new_text.to_i
iter.set_value(column, @articles[i].number)
when COLUMN_PRODUCT
i = iter.path.indices[0]
@articles[i].product = new_text
iter.set_value(column, @articles[i].product)
end
end
def add_item(model)
foo = Item.new(0, 'Description here', true)
@articles.concat([foo])
iter = model.append
foo.each_with_index do |value, index|
iter.set_value(index, value)
end
end
def remove_item(treeview)
model = treeview.model
selection = treeview.selection
if iter = selection.selected
@articles.delete_at(iter.path.indices[0])
model.remove(iter)
end
end
end
end
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