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/image3.rb | 125 ++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 jni/ruby/ext/tk/sample/demos-en/image3.rb

(limited to 'jni/ruby/ext/tk/sample/demos-en/image3.rb')

diff --git a/jni/ruby/ext/tk/sample/demos-en/image3.rb b/jni/ruby/ext/tk/sample/demos-en/image3.rb
new file mode 100644
index 0000000..edb6d23
--- /dev/null
+++ b/jni/ruby/ext/tk/sample/demos-en/image3.rb
@@ -0,0 +1,125 @@
+# image3.rb
+#
+# This demonstration script creates a simple collection of widgets
+# that allow you to select and view images in a Tk label.
+#
+# widget demo 'load image' (called by 'widget')
+#
+
+# toplevel widget
+if defined?($image3_demo) && $image3_demo
+  $image3_demo.destroy
+  $image3_demo = nil
+end
+
+# demo toplevel widget
+$image3_demo = TkToplevel.new {|w|
+  title('Image Demonstration #3')
+  iconname("Image3")
+  positionWindow(w)
+}
+
+base_frame = TkFrame.new($image3_demo).pack(:fill=>:both, :expand=>true)
+
+#
+def loadDir3(w)
+  w.delete(0,'end')
+  Dir.glob([$dirName,'*'].join(File::Separator)).sort.each{|f|
+    w.insert('end',File.basename(f))
+  }
+end
+
+# selectAndLoadDir3 --
+# This procedure pops up a dialog to ask for a directory to load into
+# the listobx and (if the user presses OK) reloads the directory
+# listbox from the directory named in the demo's entry.
+#
+# Arguments:
+# w -                   Name of the toplevel window of the demo.
+def selectAndLoadDir3(w, lbox)
+  dir = Tk.chooseDirectory(:initialdir=>$dirName.value,
+                           :parent=>w, :mustexist=>true)
+  if dir.length > 0
+    $dirName.value = dir
+    loadDir3(lbox)
+  end
+end
+
+def loadImage(w,x,y)
+  $image3a.file([$dirName, w.get("@#{x},#{y}")].join(File::Separator))
+end
+
+
+# label
+msg = TkLabel.new(base_frame) {
+  font $font
+  wraplength '4i'
+  justify 'left'
+  text "This demonstration allows you to view images using a Tk \"photo\" image.  First type a directory name in the listbox, then type Return to load the directory into the listbox.  Then double-click on a file name in the listbox to see that image."
+}
+msg.pack('side'=>'top')
+
+# frame
+TkFrame.new(base_frame) {|frame|
+  TkButton.new(frame) {
+    text 'Dismiss'
+    command proc{
+      tmppath = $image3_demo
+      $image3_demo = nil
+      tmppath.destroy
+    }
+  }.pack('side'=>'left', 'expand'=>'yes')
+
+  TkButton.new(frame) {
+    text 'Show Code'
+    command proc{showCode 'image3'}
+  }.pack('side'=>'left', 'expand'=>'yes')
+
+}.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')
+
+# variable
+$dirName = TkVariable.new([$demo_dir,'..','images'].join(File::Separator))
+
+# image
+begin
+  $image3a.delete
+rescue
+end
+$image3a = TkPhotoImage.new
+
+#
+image3_f = TkFrame.new(base_frame).pack(:fill=>:both, :expand=>true)
+
+image3_df = TkLabelFrame.new(base_frame, :text=>'Directory:')
+
+image3_ff = TkLabelFrame.new(base_frame, :text=>'File:',
+                             :padx=>'2m', :pady=>'2m')
+image3_lbx = TkListbox.new(image3_ff, :width=>20, :height=>10) {
+  pack(:side=>:left, :fill=>:y, :expand=>true)
+  yscrollbar(TkScrollbar.new(image3_ff).pack(:side=>:left, :fill=>:y,
+                                             :expand=>true))
+  insert(0, *(%w(earth.gif earthris.gif teapot.ppm)))
+  bind('Double-1', proc{|x,y| loadImage(self, x, y)}, '%x %y')
+}
+
+image3_ent = TkEntry.new(image3_df, :width=>30, :textvariable=>$dirName){
+  pack(:side=>:left, :fill=>:both, :padx=>'2m', :pady=>'2m', :expand=>true)
+  bind('Return', proc{loadDir3(image3_lbx)})
+}
+
+TkButton.new(image3_df, :pady=>0, :padx=>'2m', :text=>"Select Dir.",
+             :command=>proc{selectAndLoadDir3(image3_ent, image3_lbx)}) {
+  pack(:side=>:left, :fill=>:y, :padx=>[0, '2m'], :pady=>'2m')
+}
+
+image3_if = TkLabelFrame.new(base_frame, :text=>'Image:') {|f|
+  # TkLabel.new(f, :image=>$image3a).pack(:padx=>'2m', :pady=>'2m')
+  Tk::Label.new(f, :image=>$image3a).pack(:padx=>'2m', :pady=>'2m')
+}
+
+Tk.grid(image3_df,  '-',
+        :sticky=>:ew, :padx=>'1m', :pady=>'1m', :in=>image3_f)
+Tk.grid(image3_ff, image3_if,
+        :sticky=>:nw, :padx=>'1m', :pady=>'1m', :in=>image3_f)
+TkGrid.columnconfigure(image3_f, 1, :weight=>1)
+
-- 
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