Class: Glimmer::Tk::TextProxy

Inherits:
WidgetProxy show all
Defined in:
lib/glimmer/tk/text_proxy.rb

Overview

Proxy for Tk::Text

Follows the Proxy Design Pattern

Instance Attribute Summary

Attributes inherited from WidgetProxy

#args, #children, #keyword, #parent_proxy, #tk

Instance Method Summary collapse

Methods inherited from WidgetProxy

#add_observer, #apply_style, #attribute_setter, #content, create, #font=, #get_attribute, #grid, #has_attribute?, #has_attributes_attribute?, #has_state?, #image_argument, #initialize, #method_missing, #post_add_content, #post_initialize_child, #respond_to?, #set_attribute, #style=, tk_widget_class_for, #tk_widget_has_attribute_getter_setter?, #tk_widget_has_attribute_setter?, #widget_attribute_listener_installers, #widget_custom_attribute_mapping, widget_exists?, widget_proxy_class

Constructor Details

This class inherits a constructor from Glimmer::Tk::WidgetProxy

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Glimmer::Tk::WidgetProxy

Instance Method Details

#add_format(region_start, region_end, option, value) ⇒ Object 



110
111
112
113
114
115
116
 
# File 'lib/glimmer/tk/text_proxy.rb', line 110

def add_format(region_start, region_end, option, value)
  @@tag_number = 0 unless defined?(@@tag_number)
  tag = "tag#{@@tag_number += 1}"
  @tk.tag_configure(tag, {option => value})
  @tk.tag_add(tag, region_start, region_end)
  tag
end

#add_selection_font_format(option, value) ⇒ Object 



74
75
76
 
# File 'lib/glimmer/tk/text_proxy.rb', line 74

def add_selection_font_format(option, value)
  process_selection_ranges { |range_start, range_end| add_font_format(range_start, range_end, option, value) }
end

#add_selection_format(option, value) ⇒ Object 



62
63
64
 
# File 'lib/glimmer/tk/text_proxy.rb', line 62

def add_selection_format(option, value)
  process_selection_ranges { |range_start, range_end| add_format(range_start, range_end, option, value) }
end

#applied_format?(region_start, region_end, option, value) ⇒ Boolean

Returns:

  • (Boolean) 


94
95
96
 
# File 'lib/glimmer/tk/text_proxy.rb', line 94

def applied_format?(region_start, region_end, option, value)
  !applied_format_tags(region_start, region_end, option, value).empty?
end

#applied_format_tags(region_start, region_end, option, value) ⇒ Object 



98
99
100
101
102
103
104
105
106
107
108
 
# File 'lib/glimmer/tk/text_proxy.rb', line 98

def applied_format_tags(region_start, region_end, option, value)
  tag_names = @tk.tag_names - ['sel']
  
  tag_names.select do |tag_name|
    @tk.tag_ranges(tag_name).any? do |range|
      if range.first.to_f <= region_start.to_f && range.last.to_f >= region_end.to_f
        @tk.tag_cget(tag_name, option) == value
      end
    end
  end
end

#handle_listener(listener_name, &listener) ⇒ Object 



30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
 
# File 'lib/glimmer/tk/text_proxy.rb', line 30

def handle_listener(listener_name, &listener)
  listener_name = listener_name.to_s.downcase
  case listener_name
  when '<<modified>>', '<modified>', 'modified'
    modified_listener = Proc.new do |*args|
      listener.call(*args)
      @tk.modified = false
    end
    bind('<Modified>', modified_listener)
  when '<<selection>>', '<selection>', 'selection'
    bind('<Selection>', listener)
  else
    super
  end
end

#process_selection_ranges(&processor) ⇒ Object 



86
87
88
89
90
91
92
 
# File 'lib/glimmer/tk/text_proxy.rb', line 86

def process_selection_ranges(&processor)
  @tk.tag_ranges('sel').each do |region|
    range_start = region.first
    range_end = region.last
    processor.call(range_start, range_end)
  end
end

#remove_format(region_start, region_end, option, value) ⇒ Object 



118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
 
# File 'lib/glimmer/tk/text_proxy.rb', line 118

def remove_format(region_start, region_end, option, value)
  partial_intersection_option_applied_tags = tag_names.select do |tag_name|
    @tk.tag_ranges(tag_name).any? do |range|
      if range.first.to_f.between?(region_start.to_f, region_end.to_f) or
         range.last.to_f.between?(region_start.to_f, region_end.to_f) or
         (range.first.to_f <= region_start.to_f && range.last.to_f >= region_end.to_f)
        @tk.tag_cget(tag_name, option) == value
      end
    end
  end
  
  partial_intersection_option_applied_tags.each do |tag_name|
    @tk.tag_remove(tag_name, region_start, region_end)
  end
  
  nil
end

#remove_selection_font_format(option, value) ⇒ Object 



78
79
80
 
# File 'lib/glimmer/tk/text_proxy.rb', line 78

def remove_selection_font_format(option, value)
  process_selection_ranges { |range_start, range_end| remove_font_format(range_start, range_end, option, value) }
end

#remove_selection_format(option, value) ⇒ Object 



66
67
68
 
# File 'lib/glimmer/tk/text_proxy.rb', line 66

def remove_selection_format(option, value)
  process_selection_ranges { |range_start, range_end| remove_format(range_start, range_end, option, value) }
end

#text ⇒ Object 



58
59
60
 
# File 'lib/glimmer/tk/text_proxy.rb', line 58

def text
  @text = get("1.0", 'end')
end

#text=(value) ⇒ Object 



46
47
48
49
50
51
52
53
54
55
56
 
# File 'lib/glimmer/tk/text_proxy.rb', line 46

def text=(value)
  if value != @text
    if @text && value.start_with?(@text)
      insert('end', value[@text.size..-1])
    else
      delete('1.0', 'end')
      insert('end', value)
    end
    @text = value
  end
end

#toggle_format(region_start, region_end, option, value) ⇒ Object

toggles option/value tag (removes if already applied)



137
138
139
140
141
142
143
 
# File 'lib/glimmer/tk/text_proxy.rb', line 137

def toggle_format(region_start, region_end, option, value)
  if applied_format?(region_start, region_end, option, value)
    remove_format(region_start, region_end, option, value)
  else
    add_format(region_start, region_end, option, value)
  end
end

#toggle_selection_font_format(option, value) ⇒ Object 



82
83
84
 
# File 'lib/glimmer/tk/text_proxy.rb', line 82

def toggle_selection_font_format(option, value)
  process_selection_ranges { |range_start, range_end| toggle_font_format(range_start, range_end, option, value) }
end

#toggle_selection_format(option, value) ⇒ Object 



70
71
72
 
# File 'lib/glimmer/tk/text_proxy.rb', line 70

def toggle_selection_format(option, value)
  process_selection_ranges { |range_start, range_end| toggle_format(range_start, range_end, option, value) }
end