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/demos-en/check2.rb | 109 ++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 jni/ruby/ext/tk/sample/demos-en/check2.rb

(limited to 'jni/ruby/ext/tk/sample/demos-en/check2.rb')

diff --git a/jni/ruby/ext/tk/sample/demos-en/check2.rb b/jni/ruby/ext/tk/sample/demos-en/check2.rb
new file mode 100644
index 0000000..4f7b1f0
--- /dev/null
+++ b/jni/ruby/ext/tk/sample/demos-en/check2.rb
@@ -0,0 +1,109 @@
+#
+# checkbutton widget demo2 (called by 'widget')
+#
+
+# delete old toplevel widget
+if defined?($check2_demo) && $check2_demo
+  $check2_demo.destroy
+  $check2_demo = nil
+end
+
+# create demo toplevel widget
+$check2_demo = TkToplevel.new {|w|
+  title("Checkbutton Demonstration 2")
+  iconname("check2")
+  positionWindow(w)
+}
+
+base_frame = TkFrame.new($check2_demo).pack(:fill=>:both, :expand=>true)
+
+# label
+msg = TkLabel.new(base_frame) {
+  font $font
+  wraplength '4i'
+  justify 'left'
+  text "Four checkbuttons are displayed below.  If you click on a button, it will toggle the button's selection state and set a Tcl variable to a value indicating the state of the checkbutton.  The first button also follows the state of the other three.  If only some of the three are checked, the first button will display the tri-state mode. Click the \"See Variables\" button to see the current values of the variables."
+}
+msg.pack('side'=>'top')
+
+# variable
+safety = TkVariable.new(0)
+wipers = TkVariable.new(0)
+brakes = TkVariable.new(0)
+sober  = TkVariable.new(0)
+
+# frame
+TkFrame.new(base_frame) {|frame|
+  TkGrid(TkFrame.new(frame, :height=>2, :relief=>:sunken, :bd=>2),
+         :columnspan=>4, :row=>0, :sticky=>'ew', :pady=>2)
+  TkGrid('x',
+         TkButton.new(frame, :text=>'See Variables',
+                      :image=>$image['view'], :compound=>:left,
+                      :command=>proc{
+                        showVars($check2_demo,
+                                 ['safety', safety], ['wipers', wipers],
+                                 ['brakes', brakes], ['sober', sober])
+                      }),
+         TkButton.new(frame, :text=>'See Code',
+                      :image=>$image['view'], :compound=>:left,
+                      :command=>proc{showCode 'check2'}),
+         TkButton.new(frame, :text=>'Dismiss',
+                      :image=>$image['delete'], :compound=>:left,
+                      :command=>proc{
+                        tmppath = $check2_demo
+                        $check2_demo = nil
+                        $showVarsWin[tmppath.path] = nil
+                        tmppath.destroy
+                      }),
+         :padx=>4, :pady=>4)
+  frame.grid_columnconfigure(0, :weight=>1)
+}.pack('side'=>'bottom', 'fill'=>'x')
+
+
+# checkbutton
+TkCheckButton.new(base_frame, :text=>'Safety Check', :variable=>safety,
+                  :relief=>:flat, :onvalue=>'all', :offvalue=>'none',
+                  :tristatevalue=>'partial'){
+  pack('side'=>'top', 'pady'=>2, 'anchor'=>'w')
+}
+
+[ TkCheckButton.new(base_frame, 'text'=>'Wipers OK', 'variable'=>wipers),
+  TkCheckButton.new(base_frame, 'text'=>'Brakes OK', 'variable'=>brakes),
+  TkCheckButton.new(base_frame, 'text'=>'Driver Sober', 'variable'=>sober)
+].each{|w|
+  w.relief('flat')
+  w.pack('side'=>'top', 'padx'=>15, 'pady'=>2, 'anchor'=>'w')
+}
+
+# tristate check
+in_check = false
+tristate_check = proc{|n1,n2,op|
+  unless in_check
+    in_check = true
+    begin
+      if n1 == safety
+        if safety == 'none'
+          wipers.value = 0
+          brakes.value = 0
+          sober.value  = 0
+        elsif safety == 'all'
+          wipers.value = 1
+          brakes.value = 1
+          sober.value  = 1
+        end
+      else
+        if wipers == 1 && brakes == 1 && sober == 1
+          safety.value = 'all'
+        elsif wipers == 1 || brakes == 1 || sober == 1
+          safety.value = 'partial'
+        else
+          safety.value = 'none'
+        end
+      end
+    ensure
+      in_check = false
+    end
+  end
+}
+
+[wipers, brakes, sober, safety].each{|v| v.trace('w', tristate_check)}
-- 
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