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Contents
module Tk
# Wait for variable to change or window to be destroyed
#
# This module provides blocking calls that wait for one of several things to
# happen, then return without taking any other actions.
#
# The tkwait command waits for one of several things to happen, then it
# returns without taking any other actions.
# The return value is always nil.
#
# While the methods are waiting, events are processed in the normal fashion,
# so the application will continue to respond to user interactions.
# If an event handler invokes [Wait] methods again, the nested call must
# complete before the outer call can complete.
module Wait
module_function
# Waits for the variable called +name+ to be modified.
def variable(name)
Tk.execute_only(:tkwait, :variable, name)
end
# Takes the +name+ of a window and waits for a change in its visibility
# state (as indicated by the arrival of a VisibilityNotify event).
# Typically used to wait for a newly-created window to appear on the screen
# before taking some action.
def visibility(name)
Tk.execute_only(:tkwait, :visibility, name)
end
# This method takes the name of a window as argument and waits until the
# window is destroyed.
# It is typically used to wait for a user to finish interacting with a
# dialog box before using the result of that interaction.
def window(name)
Tk.execute_only(:tkwait, :window, name)
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems