Class: Lore::GUI::Form_Generator

Inherits:
Object
  • Object
show all
Defined in:
lib/lore/gui/form_generator.rb

Overview

Usage: 

generator = Form_Generator.new(Table_Accessor, Lang, :readonly | :mutable)
form = generator.generate

See documentation of Cuba::GUI::Form for usage of form instances.

Instance Method Summary collapse

Constructor Details

#initialize(klass = nil, labels = {}, mode = :mutable, custom_elements = {}) ⇒ Form_Generator

{{{



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# File 'lib/lore/gui/form_generator.rb', line 17

def initialize(klass=nil, labels={}, mode=:mutable, custom_elements={}) # {{{
  
  @logger          = Lore.logger
  @form            = Form.new()
  @labels          = labels
  @klass           = klass
  @custom_elements = custom_elements

  Textarea.reset_counter

  @logger.debug('CUSTOM ELEMENTS: ' << @custom_elements.inspect)
  
  if @klass.nil? then return end
  @logger.debug('GET_ATTRIBUTES: ' << @klass.inspect)
  @logger.debug('GET_ATTRIBUTES: ' << @klass.get_attributes.inspect)
  @klass.get_attributes.each_pair { |table, attributes| 

  # handle attributes passed via attrib_setup: 
    
    attributes.each { |attrib|

      label_tag = table.gsub('.','--') << '--' << attrib
      if(@labels[label_tag].to_s != '' && @labels[label_tag] != label_tag) then 
        label = @labels[label_tag] 
      else
        label = attrib.gsub('_',' ').capitalize
      end
      
      # @custom_elements is a hash mapping attribute names to
      # Custom_Element instances. 
      if ((@custom_elements[table]) and
          (@custom_elements[table][attrib])) then
        
        form_element = @custom_elements[table][attrib].new(table, attrib, label)
        form_element.mode = mode
        @form.add(form_element)
        
      elsif (@klass.get_primary_keys[table].nil? or
             !@klass.get_primary_keys[table].include? attrib) and
            (@klass.get_implicit_attributes[table].nil? or
             !@klass.get_implicit_attributes[table].include? attrib) and
            (@klass.get_has_a_klasses.nil? or
             @klass.get_has_a_klasses[table+'.'+attrib].nil?) and
            (@klass.get_hidden_attributes[table].nil? or
             !@klass.get_hidden_attributes[table].include? attrib)
      then
        
        case @klass.get_attribute_types[table][attrib]
          
        when Lore::PG_BOOL
          form_element = Radio.new(table, attrib, label, ['t','f'])
          
        when Lore::PG_SMALLINT || Lore::PG_INT
          form_element = Text.new(table, attrib, label, nil)
          
        when Lore::PG_VARCHAR
          form_element = Text.new(table, attrib, label, nil, nil)
          if (!@klass.get_maxlength.nil? && 
              !@klass.get_maxlength[table].nil? && 
              !@klass.get_maxlength[table][attrib.intern].nil?) then 
            form_element.set_length(@klass.get_maxlength[table][attrib.intern])
          end
          
        when Lore::PG_TEXT
          form_element = Textarea.new(table, attrib, label, nil, nil)
          if (!@klass.get_maxlength.nil? && 
              !@klass.get_maxlength[table].nil? && 
              !@klass.get_maxlength[table][attrib.intern].nil?) then 
            form_element.set_length(@klass.get_maxlength[table][attrib.intern])
          end
          
        when Lore::PG_TIMESTAMP_TIMEZONE
          form_element = Date.new(table, attrib, label, nil)
          
        when Lore::PG_DATE
          form_element = Date.new(table, attrib, label, nil)
          
        else
          form_element = Text.new(table, attrib, label, nil)
        end
        
        form_element.set_mode(mode)
        @form.add(form_element)
        
      elsif (!@klass.get_has_a_klasses.nil? and
             !@klass.get_has_a_klasses[table+'.'+attrib].nil?)
      then 
        foreign_klass   = @klass.get_has_a_klasses[table+'.'+attrib]
        foreign_table   = foreign_klass.table_name
        
        form_element    = Klass_Select.new(foreign_klass, table, attrib, label)
        form_element.set_mode(mode)
        @form.add(form_element)
        
      elsif (!@klass.get_aggregate_klasses.nil? and
             !@klass.get_aggregate_klasses[table+'.'+attrib].nil?)
      then 
        foreign_klass   = @klass.get_aggregate_klasses[table+'.'+attrib]
        foreign_table   = foreign_klass.table_name
        
        form_element    = Klass_Select.new(foreign_klass, table, attrib, label)
        form_element.set_mode(mode)
        @form.add(form_element)
        
        # Attribute is explixit (expected/required) but not 
        # catched before -> Add attribute as hidden field: 
      elsif (!@klass.get_explicit_attributes[table].nil? and 
             @klass.get_explicit_attributes[table].include? attrib)
      then
        form_element    = Hidden.new(table, attrib)
        @form.add(form_element)
        
      elsif (!@klass.get_implicit_attributes[table].nil? and 
             @klass.get_implicit_attributes[table].include? attrib)
      then
        @logger.debug(attrib+' is implicit')
        
      end
      
    }
  }
end

Instance Method Details

#generate ⇒ Object

Returns instance of Cuba::GUI::Form configured for klass passed in constructor:



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# File 'lib/lore/gui/form_generator.rb', line 142

def generate() # {{{
  return @form
end