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+# image2.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?($image2_demo) && $image2_demo
+ $image2_demo.destroy
+ $image2_demo = nil
+end
+
+# demo toplevel widget
+$image2_demo = TkToplevel.new {|w|
+ title('Image Demonstration #2')
+ iconname("Image2")
+ positionWindow(w)
+}
+
+# label
+msg = TkLabel.new($image2_demo) {
+ font $font
+ wraplength '4i'
+ justify 'left'
+ text "This demonstration allows you to view images using a Tk \"photo\" image. First type a directory name in the listbox, then press Enter to load the directory into the listbox. Then double-click on a file name in the listbox to see that image."
+}
+msg.pack('side'=>'top')
+
+# frame
+TkFrame.new($image2_demo) {|frame|
+ TkButton.new(frame) {
+ text 'Dismiss'
+ command proc{
+ tmppath = $image2_demo
+ $image2_demo = nil
+ tmppath.destroy
+ }
+ }.pack('side'=>'left', 'expand'=>'yes')
+
+ TkButton.new(frame) {
+ text 'Show Code'
+ command proc{showCode 'image2'}
+ }.pack('side'=>'left', 'expand'=>'yes')
+
+}.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')
+
+# create variable
+$dirName = TkVariable.new([$demo_dir,'..','images'].join(File::Separator))
+
+# image
+$image2a = TkPhotoImage.new
+
+#
+TkLabel.new($image2_demo, 'text'=>'Directory:')\
+.pack('side'=>'top', 'anchor'=>'w')
+
+image2_e = TkEntry.new($image2_demo) {
+ width 30
+ textvariable $dirName
+}.pack('side'=>'top', 'anchor'=>'w')
+
+TkFrame.new($image2_demo, 'height'=>'3m', 'width'=>20)\
+.pack('side'=>'top', 'anchor'=>'w')
+
+TkLabel.new($image2_demo, 'text'=>'File:')\
+.pack('side'=>'top', 'anchor'=>'w')
+
+TkFrame.new($image2_demo){|w|
+ s = TkScrollbar.new(w)
+ l = TkListbox.new(w) {
+ width 20
+ height 10
+ yscrollcommand proc{|first,last| s.set first,last}
+ }
+ s.command(proc{|*args| l.yview(*args)})
+ l.pack('side'=>'left', 'expand'=>'yes', 'fill'=>'y')
+ s.pack('side'=>'left', 'expand'=>'yes', 'fill'=>'y')
+ #l.insert(0,'earth.gif', 'earthris.gif', 'mickey.gif', 'teapot.ppm')
+ l.insert(0,'earth.gif', 'earthris.gif', 'teapot.ppm')
+ l.bind('Double-1', proc{|x,y| loadImage $image2a,l,x,y}, '%x %y')
+
+ image2_e.bind 'Return', proc{loadDir l}
+
+}.pack('side'=>'top', 'anchor'=>'w')
+
+# image
+[ TkFrame.new($image2_demo, 'height'=>'3m', 'width'=>20),
+ TkLabel.new($image2_demo, 'text'=>'Image:'),
+ TkLabel.new($image2_demo, 'image'=>$image2a)
+].each{|w| w.pack('side'=>'top', 'anchor'=>'w')}
+
+#
+def loadDir(w)
+ w.delete(0,'end')
+ Dir.glob([$dirName,'*'].join(File::Separator)).sort.each{|f|
+ w.insert('end',File.basename(f))
+ }
+end
+
+def loadImage(img,w,x,y)
+ img.file([$dirName, w.get("@#{x},#{y}")].join(File::Separator))
+end
+