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ruby-****@lists*****
2003年 4月 7日 (月) 17:47:53 JST
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= class Gtk::TextMark
A Gtk::TextMark is like a bookmark in a text buffer; it preserves a position in the text. You can convert the mark to an iterator using Gtk::TextBuffer#iter_at_mark. Unlike iterators, marks remain valid across buffer mutations, because their behavior is defined when text is inserted or deleted. When text containing a mark is deleted, the mark remains in the position originally occupied by the deleted text. When text is inserted at a mark, a mark with left gravity will be moved to the beginning of the newly-inserted text, and a mark with right gravity will be moved to the end. "left" and "right" here refer to logical direction (left is the toward the start of the buffer); in some languages such as Hebrew the logically-leftmost text is not actually on the left when displayed.
Marks optionally have names; these can be convenient to avoid passing the Gtk::TextMark object around.
Marks are typically created using the Gtk::TextBuffer#create_mark.
== super class
* GLib::Object
== public instance methods
--- buffer
Gets the Gtk::TextBuffer this mark is located inside, or nil if the mark is deleted.
* Returns: Gtk::TextBuffer
--- deleted?
Returns true if the mark has been removed from its buffer with Gtk::TextBuffer#delete_mark. Marks can't be used once deleted.
* Returns: true or false
--- left_gravity?
Determines whether the mark has left gravity.
* Returns: true if the mark has left gravity, false otherwise
--- name
Returns the mark name; returns nil for anonymous marks.
* Returns: mark name or nil
--- visible?
Returns true if the mark is visible (i.e. a cursor is displayed for it)
* Returns: true or false
--- visible=(setting)
Sets the visibility of mark; the insertion point is normally visible, i.e. you can see it as a vertical bar. Also, the text widget uses a visible mark to indicate where a drop will occur when dragging-and-dropping text. Most other marks are not visible. Marks are not visible by default.
* setting: visibility of mark (true or false)
* Returns: setting
--- set_visible(setting)
Same as visible=.
* setting: visibility of mark (true or false)
* Returns: Gtk::TextMark
* 2003-04-07 ((<Masao>)): Move from The RWiki. Some modified.
* 2002-12-14 ((<OGASAWARA>))