ruby-****@sourc*****
ruby-****@sourc*****
2012年 8月 10日 (金) 04:02:17 JST
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REMOTE_ADDR = 184.145.90.35
REMOTE_HOST =
URL = http://ruby-gnome2.sourceforge.jp/hiki.cgi?tut-treeview-selection-handle
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@@ -104,3 +104,148 @@
selection.selected_each { count += 1 }
count
end
+
+Following is the entire program in which some of the code samples from above paragraphs are included:
+
+
+ #!/usr/bin/env ruby
+ =begin
+ SEARCHING TREE VIEW FOR SELECTIONS
+ ==================================
+ Into this program I packed things we've learned so far about
+ Gtk::TreeView, and the pertinent data model.
+
+ Included items are:
+
+ 1) The connection strategy of model an view:
+ Gtk::TreeViewColumn.new("Buy", renderer, :text => BUY_IT [, ...] )
+ where [, ...] are in the form of :property => COLUMN_NUM, ...
+
+ 2) The use of {{ set_cell_data_func(renderer) {|col, renderer, model, iter| ...} }}
+
+ 3) Catching double-clicks on a row. It's quite easy and is done by
+ connecting to a tree view's "row-activated" signal
+
+ 4) Traversing through selected rows via
+ {{ selection.selected_each do |model, path, iter| ... end }}
+ =end
+
+ require 'gtk2'
+
+ def setup_tree_view(treeview)
+ renderer = Gtk::CellRendererText.new
+ column = Gtk::TreeViewColumn.new("Buy", renderer, :text => BUY_IT)
+ column.set_cell_data_func(renderer) do |col, renderer, model, iter|
+ renderer.background = iter[BUY_IT] ? "red" : nil
+ end
+ 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)
+ treeview.append_column(column)
+ end
+
+ def traverse_list_to_print_all_rows(store)
+ # get first row in list store
+ return unless iter = store.iter_first
+
+ begin
+ puts "Product: #{iter[2]} Buy:#{iter[0]}"
+ end while iter.next!
+ end
+
+ def print_only_unselected_rows(store, treev)
+ # get first row in list store
+ return unless iter = store.iter_first
+
+ # - You can check whether a given row is selected or not using the
+ # -
+ # - Gtk::TreeSelection#iter_is_selected?
+ # - or
+ # - Gtk::TreeSelection#path_is_selected?
+ # -
+ # - methods. If you want to know all rows that are not selected, for
+ # - example, you could just traverse the whole list or tree, and use
+ # - the above methods to check for each row whether it is selected or not.
+
+ all_selections = treev.selection # <--- obtain all selections from TreeView
+ begin
+ puts "Product: #{iter[2]} Buy:#{iter[0]}" if ! all_selections.iter_is_selected?(iter)
+ end while iter.next! # =-==============-=======================
+ end
+
+
+ # Print all selected rows (2nd way /using VIEW/
+ def print_all_selected_rows(treev)
+
+ treev.selection.selected_each do |model, path, iter|
+ puts "Product: #{iter[2]} Buy:#{iter[0]}"
+ end
+ end
+
+
+ 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")
+
+ store = Gtk::ListStore.new(TrueClass, Integer, String)
+ treeview = Gtk::TreeView.new(store) # Add the tree model (store) to the tree view
+ treeview.selection.mode = Gtk::SELECTION_MULTIPLE
+
+ treeview.signal_connect("row-activated") do |view, path, column|
+ puts "Row #{path.to_str} was clicked!"
+
+ if iter = view.model.get_iter(path)
+ puts "Double-clicked row contains product: #{iter[2]}!"
+ end
+ end
+
+ setup_tree_view(treeview)
+
+ list.each_with_index do |e, i|
+ iter = store.append
+ store.set_value(iter, BUY_IT, list[i].buy) # iter[BUY_IT] = list[i].buy
+ store.set_value(iter, QUANTITY, list[i].quantity) # iter[QUANTITY] = list[i].quantity
+ store.set_value(iter, PRODUCT, list[i].product) # iter[PRODUCT] = list[i].product
+ end
+
+ vbox = Gtk::VBox.new(homogeneous = false, spacing = nil)
+ button = Gtk::Button.new("Collect and analize selections")
+ button.signal_connect("clicked") do |w|
+
+ puts "==== All rows regardless of selection (1st way /using MODEL/"
+ traverse_list_to_print_all_rows(store)
+
+ puts "==== All NON-selected rows"
+ print_only_unselected_rows(store, treeview)
+
+ puts "==== All selected rows (2nd way /using VIEW/)"
+ print_all_selected_rows(treeview)
+ end
+
+ scrolled_win = Gtk::ScrolledWindow.new
+ scrolled_win.add(treeview)
+ scrolled_win.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC)
+
+ vbox.pack_start_defaults(scrolled_win)
+ vbox.pack_start_defaults(button)
+ 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)
+ window.add(vbox)
+ window.show_all
+ Gtk.main