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GTk2 ComboBox [复制链接]

shijiang1130

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发表于 2013-07-10 10:36 |只看该作者 |倒序浏览

#!/usr/bin/env ruby
require 'gtk2'
def add_product(treeview, list)
# Create a dialog that will be used to create a new product.
dialog = Gtk::Dialog.new(
"Add a Product",
nil,
Gtk::Dialog::MODAL,
[ Gtk::Stock::ADD, Gtk::Dialog::RESPONSE_OK ],
[ Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL ]
)
# Create widgets that will be packed into the dialog.
combobox = Gtk::ComboBox.new
entry = Gtk::Entry.new
# min, max, step
spin = Gtk::SpinButton.new(0, 100, 1)
# Set the precision to be displayed by spin button.
spin.digits = 0
check = Gtk::CheckButton.new("_Buy the Product")
# Add all of the categories to the combo box.
list.each_with_index do |e, i|
combobox.append_text(list[i].product) if (e.product_type == P_CATEGORY)
end
### Usually, after initialiying combobox you would set the default
### combobox.active = 0 # set active index (1st row)
table = Gtk::Table.new(4, 2, false)
table.row_spacings = 5
table.column_spacings = 5
table.border_width = 5
# Pack the table that will hold the dialog widgets.
fll_shr = Gtk::SHRINK | Gtk::FILL
fll_exp = Gtk::EXPAND | Gtk::FILL
table.attach(Gtk::Label.new("Category:"), 0, 1, 0, 1, fll_shr, fll_shr, 0, 0)
table.attach(combobox, 1, 2, 0, 1, fll_exp, fll_shr, 0, 0)
table.attach(Gtk::Label.new("Product:"), 0, 1, 1, 2, fll_shr, fll_shr, 0, 0)
table.attach(entry, 1, 2, 1, 2, fll_exp, fll_shr, 0, 0)
table.attach(Gtk::Label.new("Quantity:"), 0, 1, 2, 3, fll_shr, fll_shr, 0, 0)
table.attach(spin, 1, 2, 2, 3, fll_exp, fll_shr, 0, 0)
table.attach(check, 1, 2, 3, 4, fll_exp, fll_shr, 0, 0)
dialog.vbox.pack_start_defaults(table)
dialog.show_all
dialog.run do |response|
# If the user presses OK, verify the entries and add the product.
if response == Gtk::Dialog::RESPONSE_OK
quantity = spin.value
product = entry.text
category = combobox.active_text
buy = check.active?
if product == "" || category == nil
puts "All of the fields were not correctly filled out!"
puts "DEBUG: prod=(#{product}), ctg=(#{category})"
dialog.destroy
return
end
model = treeview.model
iter = model.iter_first #<-- same as: iter = model.get_iter("0")
# Retrieve an iterator pointing to the selected category.
begin
name = iter[PROD_INDEX] #<-- same as: name=iter.get_value(PROD_INDEX)
break if name == category
end while iter.next!
child = model.append(iter)
# child[BUY_INDEX]=buy # same as: model.set_value(child, BUY_INDEX, buy)
child[BUY_INDEX] = buy
child[QTY_INDEX] = quantity
child[PROD_INDEX] = product
# Add the quantity to the running total if it is to be purchased.
if buy
qty_value = iter[QTY_INDEX]
qty_value += quantity
iter[QTY_INDEX] = qty_value
end
end
dialog.destroy
end
end
def remove_row(ref, model)
path = ref.path
iter = model.get_iter(path)
# Only remove the row if it is not a root row.
parent = iter.parent
if parent
buy = iter[BUY_INDEX]
quantity = iter[QTY_INDEX]
pqty = parent[QTY_INDEX]
if buy
pqty -= quantity
parent[QTY_INDEX] = pqty
end
iter = model.get_iter(path)
model.remove(iter)
end
end
def remove_products(treeview)
# Gtk::TreeRowReference.new(model, path)
selection = treeview.selection
paths2rm = Array.new
selection.selected_each do |mod, path, iter|
ref = Gtk::TreeRowReference.new(mod, path)
paths2rm << [ref, mod]
end
paths2rm.each { |ref, mod| remove_row(ref, mod) }
end
# Add three columns to the GtkTreeView. All three of the
# columns will be displayed as text, although one is a boolean
# value and another is an integer.
def setup_tree_view(treeview)
# Create a new GtkCellRendererText, add it to the tree
# view column and append the column to the tree view.
renderer = Gtk::CellRendererText.new
column = Gtk::TreeViewColumn.new("Buy", renderer, "text" => BUY_INDEX)
treeview.append_column(column)
renderer = Gtk::CellRendererText.new
column = Gtk::TreeViewColumn.new("Count", renderer, "text" => QTY_INDEX)
treeview.append_column(column)
renderer = Gtk::CellRendererText.new
column = Gtk::TreeViewColumn.new("Product", renderer, "text" => PROD_INDEX)
treeview.append_column(column)
end
window = Gtk::Window.new(Gtk::Window::TOPLEVEL)
window.resizable = true
window.title = "Grocery List"
window.border_width = 10
window.signal_connect('delete_event') { Gtk.main_quit }
window.set_size_request(275, 300)
class GroceryItem
attr_accessor :product_type, :buy, :quantity, :product
def initialize(t,b,q,p)
@product_type, @buy, @quantity, @product = t, b, q, p
end
end
BUY_INDEX = 0; QTY_INDEX = 1; PROD_INDEX = 2
P_CATEGORY = 0; P_CHILD = 1
list = Array.new
list[0] = GroceryItem.new(P_CATEGORY, true, 0, "Cleaning Supplies")
list[1] = GroceryItem.new(P_CHILD, true, 1, "Paper Towels")
list[2] = GroceryItem.new(P_CHILD, true, 3, "Toilet Paper")
list[3] = GroceryItem.new(P_CATEGORY, true, 0, "Food")
list[4] = GroceryItem.new(P_CHILD, true, 2, "Bread")
list[5] = GroceryItem.new(P_CHILD, false, 1, "Butter")
list[6] = GroceryItem.new(P_CHILD, true, 1, "Milk")
list[7] = GroceryItem.new(P_CHILD, false, 3, "Chips")
list[8] = GroceryItem.new(P_CHILD, true, 4, "Soda")
treeview = Gtk::TreeView.new
treeview.tooltip_text = "You can select multiple lines"
setup_tree_view(treeview)
# Create a new tree model with three columns, as Boolean,
# integer and string.
store = Gtk::TreeStore.new(TrueClass, Integer, String)
# Avoid creation of iterators on every iteration, since they
# need to provide state information for all iterations. Hence:
# establish closure variables for iterators parent and child.
parent = child = nil
# Add all of the products to the GtkListStore.
list.each_with_index do |e, i|
# If the product type is a category, count the quantity
# of all of the products in the category that are going
# to be bought.
if (e.product_type == P_CATEGORY)
j = i + 1
# Calculate how many products will be bought in
# the category.
while j < list.size && list[j].product_type != P_CATEGORY
list[i].quantity += list[j].quantity if list[j].buy
j += 1
end
# Add the category as a new root (parent) row (element).
parent = store.append(nil)
# store.set_value(parent, BUY_INDEX, list[i].buy # <= same as below
parent[BUY_INDEX] = list[i].buy
parent[QTY_INDEX] = list[i].quantity
parent[PROD_INDEX] = list[i].product
# Otherwise, add the product as a child row of the category.
else
child = store.append(parent)
# store.set_value(child, BUY_INDEX, list[i].buy # <= same as below
child[BUY_INDEX] = list[i].buy
child[QTY_INDEX] = list[i].quantity
child[PROD_INDEX] = list[i].product
end
end
# Add the tree model to the tree view
treeview.model = store
treeview.expand_all
# Allow multiple rows to be selected at the same time.
treeview.selection.mode = Gtk::SELECTION_MULTIPLE
scrolled_win = Gtk::ScrolledWindow.new
scrolled_win.add(treeview)
scrolled_win.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC)
add = Gtk::Button.new(Gtk::Stock::ADD)
remove = Gtk::Button.new(Gtk::Stock::REMOVE)
remove.tooltip_text = "You can select multiple\nlines and delete them"
add.signal_connect('clicked') { add_product(treeview, list) }
remove.signal_connect('clicked') { remove_products(treeview) }
hbox = Gtk::HBox.new(true, 5)
hbox.pack_start(add, false, true, 0)
hbox.pack_start(remove, false, true, 0)
vbox = Gtk::VBox.new(false, 5)
vbox.pack_start(scrolled_win, true, true, 0)
vbox.pack_start(hbox, false, true, 0)
window.add(vbox)
window.show_all
Gtk.main

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pitonas

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2楼 [报告]

发表于 2013-07-12 12:27 |只看该作者

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