ruby-****@sourc*****
ruby-****@sourc*****
2009年 2月 16日 (月) 02:25:59 JST
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REMOTE_ADDR = 74.15.84.244
REMOTE_HOST =
URL = http://ruby-gnome2.sourceforge.jp/hiki.cgi?tut-gtk2-treev-rr
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@@ -12,9 +12,9 @@
Instances of Gtk::TreePath class are a very convenient objects for referring to rows within a tree model, because it can be easily represented as a human-readable string. It can also be represented as an array of integers. For instance, if you are presented with the string 3:7:5, you would start at the fourth root element (recall that indexing begins at zero) in root level. You would next proceed to the eighth child of that root element. The row in question is that child's sixth child.
-
{{br}}
+
--- Gtk::TreePath.new(path = nil)
Creates a new Gtk::TreePath initialized to path. path is expected to be a colon separated list of numbers. For example, the string "10:4:0" would create a path of depth 3 pointing to the 11th child of the root node, the 5th child of that 11th child, and the 1st child of that 5th child. If an invalid path string is passed in, error is occured.
@@ -31,7 +31,6 @@
Returns the current indices of path. This is an array of integers, each representing a node in a tree. This value should not be freed.
* Returns : The current indices, or nil.
-
=== Tree Iterators
@@ -44,7 +43,6 @@
=== Tree Row References
-Gtk::TreeRowReference objects are used to watch a tree model for changes. Internally they connect to the ((*row-inserted,*)) ((*row-deleted,*)) and ((*row-reordered*)) signals, updating the stored path based on the changes.
+Beside an important role of watching a tree model for changes Gtk::TreeRowReference objects are extremely helpful in providing stable reference points to the information related to the constantly varying pointers to the rows in the tree model. To understand this one has to be familiar with the tree model, hence we will defer this explanation until we gather a bit more experience with this topics. For those of you, who would like to jump ahead following is the link that talks about references as a reliable means to track the position of rows within the tree: (((<Removing Multiple Rows|tut-gtk2-treev-addrnhs#Removing Multiple Rows>))). Internally they connect to the ((*row-inserted,*)) ((*row-deleted,*)) and ((*row-reordered*)) signals, updating the stored path based on the changes.
New tree row references are created with Gtk::TreeRowReference.new: