1Prima::Widget::UndoActiUosnesr(3C)ontributed Perl DocumePnrtiamtai:o:nWidget::UndoActions(3)
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NAME

6       Prima::Widget::UndoActions - undo and redo the content of editable
7       widgets
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DESCRIPTION

10       Generic helpers that implement stored actions for undo/redo.
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SYNOPSIS

Properties
14       undoLimit INTEGER
15           Sets limit on number of stored atomic undo operations. If 0, undo
16           is disabled.
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18   Methods
19       begin_undo_group
20           Opens bracket for group of actions, undone as single operation.
21           The bracket is closed by calling "end_undo_group".
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23       can_undo, can_redo
24           Return boolean flags whether undo or redo could be done.  Useful
25           for graying a menu f ex.
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27       end_undo_group
28           Closes bracket for group of actions, opened by "begin_undo_group".
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30       init_undo
31           Should be called once, inside init()
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33       has_undo_action ACTION
34           Checks whether there is any ACTION in the undo list.
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36       push_grouped_undo_action ACTION, @PARAMS
37           Stores a single undo action where ACTION is a method to be called
38           inside undo/redo, if any.  Each action is added to the last undo
39           group, and will be removed/replayed together with the other actions
40           in the group.
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42       push_undo_action ACTION, @PARAMS
43           Stores a single undo action where ACTION is a method to be called
44           inside undo/redo, if any.  Each action is a single undo/redo
45           operation.
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47       redo
48           Re-applies changes, formerly rolled back by "undo".
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50       undo
51           Rolls back changes into internal array, which size cannot extend
52           "undoLimit" value. In case "undoLimit" is 0, no undo actions can be
53           made.
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AUTHOR
56       Dmitry Karasik, <dmitry@karasik.eu.org>.
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SEE ALSO
59       Prima, Prima::Edit,
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63perl v5.38.0                      2023-07-21     Prima::Widget::UndoActions(3)



        

    


            
        

        

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