ruby-****@sourc*****
ruby-****@sourc*****
2012年 8月 14日 (火) 06:32:06 JST
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REMOTE_ADDR = 184.145.90.35
REMOTE_HOST =
URL = http://ruby-gnome2.sourceforge.jp/hiki.cgi?tut-treeview-renderer-celldatafunc
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@@ -21,3 +21,71 @@
renderer.background = nil
end
end
+
+Following is a simple example program demonstrating the use of ((*set_cell_data_func*)) function. Note that this function is associated with a particular cell renderer which is mapped to a tree view column via the column, associated to the renderer by Gtk::TreeViewColumn.new, and subsequently by the Gtk::TreeView#append_column(column) statement; so all ((*render, column*)) and ((*tree view*)) are all connected. The block associated with the ((*set_cell_data_func*)) function is executed for every row for that particular view column.
+
+ #!/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.
+ 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_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
+
+ 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")
+
+ # Create a new tree model with three columns, as Boolean,
+ # integer and string.
+ store = Gtk::ListStore.new(TrueClass, Integer, String)
+ treeview = Gtk::TreeView.new(store) # Add the tree model (store) to the tree view
+ setup_tree_view(treeview)
+
+ # Add all of the products to the GtkListStore.
+ 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
+
+ scrolled_win = Gtk::ScrolledWindow.new
+ scrolled_win.add(treeview)
+ scrolled_win.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC)
+
+ 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(scrolled_win)
+ window.show_all
+ Gtk.main