diff options
Diffstat (limited to 'ext/tk/sample/tkrttimer.rb')
-rw-r--r-- | ext/tk/sample/tkrttimer.rb | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/ext/tk/sample/tkrttimer.rb b/ext/tk/sample/tkrttimer.rb index 531f4a8d5a..0abd4ecbd2 100644 --- a/ext/tk/sample/tkrttimer.rb +++ b/ext/tk/sample/tkrttimer.rb @@ -17,8 +17,17 @@ TkLabel.new(f2, :text=>'use TkRTTimer class').pack label2 = TkLabel.new(:parent=>f2, :relief=>:raised, :width=>10).pack(:fill=>:both) -TkLabel.new(:text=>'Interval setting of each timer is 10 ms.', - :padx=>10, :pady=>5).pack +TkLabel.new(:padx=>10, :pady=>5, :justify=>'left', :text=><<EOT).pack +Interval setting of each timer object is 10 ms. +Each timer object counts up the value on each callback +(the value is not the clock data). +The count of the TkTimer object is delayed by execution +time of callbacks and inaccuracy of interval. +On the other hand, the count of the TkRTTimer object is +not delayed. Its callback interval is not accurate too. +But it can compute error correction about the time when +a callback should start. +EOT # define the procedure repeated by the TkTimer object tick = proc{|aobj| #<== TkTimer object |