From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/ruby/ext/tk/sample/tktimer3.rb | 59 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 jni/ruby/ext/tk/sample/tktimer3.rb

(limited to 'jni/ruby/ext/tk/sample/tktimer3.rb')

diff --git a/jni/ruby/ext/tk/sample/tktimer3.rb b/jni/ruby/ext/tk/sample/tktimer3.rb
new file mode 100644
index 0000000..08e8a3c
--- /dev/null
+++ b/jni/ruby/ext/tk/sample/tktimer3.rb
@@ -0,0 +1,59 @@
+#!/usr/bin/env ruby
+# This script is a re-implementation of tktimer.rb with TkTimer(TkAfter) class.
+
+require "tk"
+
+# new notation :
+#   * symbols are acceptable as keys or values of the option hash
+#   * the parent widget can be given by :parent key on the option hash
+root = TkRoot.new(:title=>'timer sample')
+label = TkLabel.new(:parent=>root, :relief=>:raised, :width=>10) \
+               .pack(:side=>:bottom, :fill=>:both)
+
+# define the procedure repeated by the TkTimer object
+tick = proc{|aobj| #<== TkTimer object
+  cnt = aobj.return_value + 5 # return_value keeps a result of the last proc
+  label.text format("%d.%02d", *(cnt.divmod(100)))
+  cnt #==> return value is kept by TkTimer object
+      #    (so, can be send to the next repeat-proc)
+}
+
+timer = TkTimer.new(50, -1, tick).start(0, proc{ label.text('0.00'); 0 })
+        # ==> repeat-interval : (about) 50 ms,
+        #     repeat : infinite (-1) times,
+        #     repeat-procedure : tick (only one, in this case)
+        #
+        # ==> wait-before-call-init-proc : 0 ms,
+        #     init_proc : proc{ label.text('0.00'); 0 }
+        #
+        # (0ms)-> init_proc ->(50ms)-> tick ->(50ms)-> tick ->....
+
+b_start = TkButton.new(:text=>'Start', :state=>:disabled) {
+  pack(:side=>:left, :fill=>:both, :expand=>true)
+}
+
+b_stop  = TkButton.new(:text=>'Stop', :state=>:normal) {
+  pack('side'=>'left', 'fill'=>'both', 'expand'=>'yes')
+}
+
+b_start.command {
+  timer.continue
+  b_stop.state(:normal)
+  b_start.state(:disabled)
+}
+
+b_stop.command {
+  timer.stop
+  b_start.state(:normal)
+  b_stop.state(:disabled)
+}
+
+TkButton.new(:text=>'Reset', :state=>:normal) {
+  command { timer.reset }
+  pack(:side=>:right, :fill=>:both, :expand=>:yes)
+}
+
+ev_quit = TkVirtualEvent.new('Control-c', 'Control-q')
+Tk.root.bind(ev_quit, proc{Tk.exit}).focus
+
+Tk.mainloop
-- 
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