ruby-****@sourc*****
ruby-****@sourc*****
2012年 8月 16日 (木) 05:15:28 JST
-------------------------
REMOTE_ADDR = 70.49.49.99
REMOTE_HOST =
URL = http://ruby-gnome2.sourceforge.jp/hiki.cgi?tut-gtk2-treev-parts
-------------------------
@@ -334,6 +334,109 @@
=== Sorting Tree View
+Following is the same program as above with added sorting features.
+
+((*liststore-sorting.rb*))
+
+ #!/usr/bin/env ruby
+ require 'gtk2'
+
+ # 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.
+ #
+ # NOTE:
+ # sorting requires model parameter <---- ------ (sorting) --------
+ # --------------------------------
+ def setup_tree_view(treeview, model)
+ # Create a new GtkCellRendererText, add it to the tree
+ # view column and append the column to the tree view.
+ renderer = Gtk::CellRendererText.new
+ renderer.foreground = "#ff0000"
+ column = Gtk::TreeViewColumn.new("Buy", renderer, :text => BUY_IT)
+ treeview.append_column(column)
+ renderer = Gtk::CellRendererText.new
+ column = Gtk::TreeViewColumn.new("Count", renderer, :text => QUANTITY)
+ treeview.append_column(column)
+ renderer = Gtk::CellRendererText.new
+
+ column = Gtk::TreeViewColumn.new("Product", renderer, :text => PRODUCT)
+
+ # Set up attributes and signals to sort this list by Product column
+ # ----------------------------------------------------------------------(sorting) -s- (1/2) ---
+ column.sort_indicator=true
+ column.clickable = true
+ column.signal_connect('clicked') do |w|
+ puts 'Column header CLICKED'
+
+ if w.sort_order == Gtk::SORT_ASCENDING
+ model.set_sort_column_id(sort_column_id=PRODUCT, order = Gtk::SORT_DESCENDING)
+ w.sort_order = Gtk::SORT_DESCENDING
+ else
+ model.set_sort_column_id(sort_column_id=PRODUCT, order = Gtk::SORT_ASCENDING)
+ w.sort_order = Gtk::SORT_ASCENDING
+ end
+ end
+ # ----------------------------------------------------------------------(sorting) -s- (1/2) ---
+ treeview.append_column(column)
+ end
+
+ window = Gtk::Window.new("Grocery List")
+ window.resizable = true
+ window.border_width = 10
+
+ window.signal_connect('destroy') { Gtk.main_quit }
+ window.set_size_request(250, 165)
+
+ class GroceryItem
+ attr_accessor :buy, :quantity, :product
+ def initialize(b, q, p); @buy, @quantity, @product = b, q, p; end
+ end
+ BUY_IT = 0; QUANTITY = 1; PRODUCT = 2
+
+ list = Array.new
+ list[0] = GroceryItem.new(true, 1, "Paper Towels")
+ list[1] = GroceryItem.new(true, 2, "Bread")
+ list[2] = GroceryItem.new(false, 1, "Butter")
+ list[3] = GroceryItem.new(true, 1, "Milk")
+ list[4] = GroceryItem.new(false, 3, "Chips")
+ list[5] = GroceryItem.new(true, 4, "Soda")
+
+ treeview = Gtk::TreeView.new
+
+ # Create a new tree model with three columns, as Boolean,
+ # integer and string.
+ store = Gtk::ListStore.new(TrueClass, Integer, String)
+ setup_tree_view(treeview, store) # NOTE: sorting requires model arrgument too
+
+ # -------------------------------------------------------------------- (sorting) -s- (2/2) ----
+ # Gtk::TreeSortable#set_sort_column_id
+ # ------------------------------------
+ store.set_sort_column_id(sort_column_id=PRODUCT, order = Gtk::SORT_ASCENDING)
+
+ # The following signal could have also been coded in the {{ setup_tree_view() }}
+ store.signal_connect('sort-column-changed') { puts "Sort order has bsen reversed " }
+ # -------------------------------------------------------------------- (sorting) -e- (2/2) ----
+
+ # Add all of the products to the GtkListStore.
+ list.each_with_index do |e, i|
+ iter = store.append
+
+ iter[BUY_IT] = list[i].buy # same as: >>> # store.set_value(iter, BUY_IT, list[i].buy)
+ iter[QUANTITY] = list[i].quantity # same as: >>> # store.set_value(iter, QUANTITY, list[i].quantity)
+ iter[PRODUCT] = list[i].product # same as: >>> # store.set_value(iter, PRODUCT, list[i].product)
+ end
+
+ # Add the tree model to the tree view
+ treeview.model = store
+
+ scrolled_win = Gtk::ScrolledWindow.new
+ scrolled_win.add(treeview)
+ scrolled_win.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC)
+
+ window.add(scrolled_win)
+ window.show_all
+ Gtk.main
{{br}}