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/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require': cannot load such file -- glimmer-dsl-tk (LoadError)

require "glimmer-dsl-tk"

include Glimmer

root {
    treeview {
        columns %w(country capital currency)
        show :headings 
        heading_configure "country", :text => 'Country'
        heading_configure "capital", :text => 'Capital'
        heading_configure "currency", :text => 'Currency'
    }
}.open

NoMethodError: undefined method `foreground=' for #<Glimmer::Tk::LabelProxy:0x00007f97c8704038 @parent_proxy=#    <Glimmer::Tk::RootProxy:0x00007f97c96ec888 @tk=#<Tk::Root:0x00007f97c972f318 @path=".">, @... >
---< backtrace of Ruby side >-----
/root/.gem/gems/glimmer-dsl-tk-0.0.60/lib/glimmer/tk/widget_proxy.rb:573:in `rescue in method_missing'
/root/.gem/gems/glimmer-dsl-tk-0.0.60/lib/glimmer/tk/widget_proxy.rb:560:in `method_missing'
aha.rb:59:in `block (3 levels) in launch'
/root/.gem/gems/tk-0.4.0/lib/tk/validation.rb:328:in `block in _initialize_for_cb_class'
/root/.gem/gems/tk-0.4.0/lib/tk.rb:1430:in `eval_cmd'
/root/.gem/gems/tk-0.4.0/lib/tk.rb:1430:in `cb_eval'
/root/.gem/gems/tk-0.4.0/lib/tk.rb:1385:in `call'
/root/.gem/gems/tk-0.4.0/lib/tk.rb:1582:in `block in callback'
/root/.gem/gems/tk-0.4.0/lib/tk.rb:1581:in `catch'
/root/.gem/gems/tk-0.4.0/lib/tk.rb:1581:in `callback'
/root/.gem/gems/tk-0.4.0/lib/tk.rb:1798:in `mainloop'
/root/.gem/gems/tk-0.4.0/lib/tk.rb:1798:in `mainloop'
/root/.gem/gems/glimmer-dsl-tk-0.0.60/lib/glimmer/tk/root_proxy.rb:69:in `start_event_loop'
/root/.gem/gems/glimmer-dsl-tk-0.0.60/lib/glimmer/tk/root_proxy.rb:43:in `open'
aha.rb:86:in `launch'
aha.rb:94:in `<main>'
---< backtrace of Tk side >-------
    invoked from within
"rb_out c00009 555-555-5555e e key .w00005 1 12 555-555-5555 key "
	(in -invalidcommand validation command executed by .w00005)
    invoked from within
"$w insert insert $s"
    (procedure "ttk::entry::Insert" line 4)
    invoked from within
"ttk::entry::Insert .w00005 e "
    (command bound to event)

require 'glimmer-dsl-tk'

class HelloEntry
  include Glimmer

  attr_accessor :default, :password, :telephone, :read_only

  def initialize
    self.default = 'default'
    self.password = 'password'
    self.telephone = '555-555-5555'
    self.read_only = 'Telephone area code is 555'
  end

  def launch
    root {
      title 'Hello, Entry!'
      minsize 230, 0
     
      label {
        grid sticky: 'ew'
        text 'default entry'
      }
      entry { |the_entry|
        grid sticky: 'ew'
        text <=> [self, :default]
      }
  
      label {
        grid sticky: 'ew'
        text 'password entry'
      }
      entry {
        grid sticky: 'ew'
        show '*'
        text <=> [self, :password]
      }

      @validated_entry_label = label {
        grid sticky: 'ew'
        text 'entry with event handlers'
      }
      entry { |the_entry|
        grid sticky: 'ew'
        text <=> [self, :telephone]

        # validate 'key' # default when on('validate') or on('invalid') is specified
        ## Validation happens on key change by default when validation listeners are specified
        ## (other accepted values: 'none', 'focus', 'focusin', 'focusout', 'key', or 'all')
    
        ## this event kicks in just after the user typed and before modifying the text variable
        on('validate') do |new_text_variable|
          telephone?(new_text_variable.value)
        end

        ## this event kicks in just after the text variable is validated and before it is modified
        on('invalid') do |validate_args|
          @validated_entry_label.text = "#{validate_args.value} is not a valid phone!"
          @validated_entry_label.foreground = 'red'
        end

        ## this event kicks in just after the text variable is validated and modified
        on('change') do |new_text_variable|
          self.read_only = "Telephone area code is #{new_text_variable.value.gsub(/[^0-9]/, '')[0...3]}"
          @validated_entry_label.text = 'entry with event handlers'
          @validated_entry_label.foreground = nil
        end
    
        ## this is similar to on('change') (which is Glimmer-specific), but more low level at the Tk level
        ## it is the equivalent of calling: the_entry.tk.textvariable.trace('write') { puts "..." }
        ## More at: https://tkdocs.com/tutorial/widgets.html#entry and https://tcl.tk/man/tcl8.6/TclCmd/trace.htm#M14
        on_textvariable('write') do
          puts "\"#{the_entry.text}\" has been written to entry!"
        end
      }

      label {
        grid sticky: 'ew'
        text 'read-only entry'
      }
      entry {
        grid sticky: 'ew'
        text <=> [self, :read_only]
        readonly true
      }
    }.open
  end

  def telephone?(text)
    !!text.match(/^\d{0,3}[-.\/]?\d{0,3}[-.\/]?\d{0,4}$/)
  end
end

HelloEntry.new.launch

require "glimmer-dsl-tk"
include Glimmer
root {
  title 'Title'
  iconphoto TkPhotoImage.new('file' => 'form.png') # Result => Error `rescue in method_missing': undefined method `iconphoto' for main:Object (NoMethodError)
}.open

root {
  title 'Title'
  root.iconphoto TkPhotoImage.new('file' => 'form.png')
}.open

require 'tk'
root = TkRoot.new {
  title "Feet to Meters"
  iconphoto TkPhotoImage.new('file' => 'form.png')
}
Tk.mainloop()

$ girb
/Users/nakilon/.rbenv/versions/2.3.8/bin/girb:22:in `load': /Users/nakilon/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/glimmer-dsl-tk-0.0.6/bin/girb:5: syntax error, unexpected tGVAR, expecting keyword_do or '{' or '(' (SyntaxError)
/Users/nakilon/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/glimmer-dsl-tk-0.0.6/bin/girb:7: syntax error, unexpected '~', expecting keyword_do or '{' or '('
if !(test -f ~/.girb_runner_exit); then
              ^
unmatched close parenthesis: /.girb_runner_exit); then
  rm -rf ~/
/Users/nakilon/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/glimmer-dsl-tk-0.0.6/bin/girb:10: syntax error, unexpected end-of-input, expecting ')'
	from /Users/nakilon/.rbenv/versions/2.3.8/bin/girb:22:in `<main>'

text {
    grid column_weight: 0
    value paths
    wrap 'word'
}