Class: Canis::TreeCellRenderer

Inherits:
Object
  • Object
show all
Includes:
ConfigSetup, Utils
Defined in:
lib/canis/core/widgets/tree/treecellrenderer.rb

Overview

This is a basic list cell renderer that will render the to_s value of anything.

TODO upgrade as per new listcellrenderer

Constant Summary collapse

PLUS_PLUS = 
"++"
PLUS_MINUS = 
"+-"
PLUS_Q = 
"+?"

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Utils

#ORIG_process_key, #ORIGbind_key, #ORIGkeycode_tos, #_process_key, #bind_composite_mapping, #bind_key, #bind_keys, #check_composite_mapping, #create_logger, #define_key, #define_prefix_command, #execute_mapping, #get_attrib, #get_color, #key, #key_tos, #print_key_bindings, #repeatm, #run_command, #shell_out, #shell_output, #suspend, #view, #xxxbind_composite_mapping

Methods included from ConfigSetup

#config_setup, #variable_set

Constructor Details

#initialize(text = "", config = {}, &block) ⇒ TreeCellRenderer

Returns a new instance of TreeCellRenderer.



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# File 'lib/canis/core/widgets/tree/treecellrenderer.rb', line 26

def initialize text="", config={}, &block
  @text = text
  @editable = false
  @focusable = false
  @actual_length = 0
  config_setup config # @config.each_pair { |k,v| variable_set(k,v) }
  instance_eval &block if block_given?
  init_vars
end

Instance Attribute Details

#actual_length ⇒ Object (readonly)

Returns the value of attribute actual_length.



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# File 'lib/canis/core/widgets/tree/treecellrenderer.rb', line 23

def actual_length
  @actual_length
end

#pcol ⇒ Object

Returns the value of attribute pcol.



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# File 'lib/canis/core/widgets/tree/treecellrenderer.rb', line 24

def pcol
  @pcol
end

Instance Method Details

#getvalue ⇒ Object 



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# File 'lib/canis/core/widgets/tree/treecellrenderer.rb', line 39

def getvalue
  @text
end

#init_vars ⇒ Object 



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# File 'lib/canis/core/widgets/tree/treecellrenderer.rb', line 35

def init_vars
  @justify ||= :left
  @display_length ||= 10
end

#prepare_default_colors(focussed, selected) ⇒ Object

sets @color_pair and @attr



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# File 'lib/canis/core/widgets/tree/treecellrenderer.rb', line 44

def prepare_default_colors focussed, selected
    @color_pair = get_color $datacolor
    @attr = @row_attr || Ncurses::A_NORMAL


    ## determine bg and fg and attr
    if selected
      #@attr = Ncurses::A_BOLD if selected
      ## 2010-09-18 18:32 making selected row reverse
      @attr |= Ncurses::A_REVERSE

      # 2010-09-18 18:33 maybe not required, just confuses the whole thing and uglifies it
      #@color_pair =get_color $selectedcolor, @parent.selected_color, @parent.selected_bgcolor unless @parent.nil?
    end
    case focussed
    when :SOFT_FOCUS
      @attr |= Ncurses::A_BOLD
    when true
      # earlier focussed row showed up in reverse, which was confusing since it looked selected
      # now focussed row has cursor on side, and can be bold. that's enough.
      @attr |= Ncurses::A_BOLD
      #@attr |= Ncurses::A_REVERSE
    when false
    end
end

#repaint(graphic, r = @row, c = @col, row_index = -1,, treearraynode = nil, value = @text, leaf = nil, focussed = false, selected = false, expanded = false) ⇒ Object

paint a list box cell

2010-09-02 15:38 changed focussed to take true, false and :SOFT_FOCUS
SOFT_FOCUS means the form focus is no longer on this field, but this row
was focussed when use was last on this field. This row will take focus
when field is focussed again

@param [Buffer] window or buffer object used for printing
@param [Integer] row
@param [Integer] column
@param [Integer] actual index into data, some lists may have actual data elsewhere and
                display data separate. e.g. rfe_renderer (directory listing)
@param [String] text to print in cell
@param [Boolean, :SOFT_FOCUS] cell focussed, not focussed, cell focussed but field is not focussed
@param [Boolean] cell selected or not

renderer.repaint @graphic, r+hh, c+@left_margin, crow, object, content, focus_type, selected, expanded, leaf



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# File 'lib/canis/core/widgets/tree/treecellrenderer.rb', line 86

def repaint graphic, r=@row,c=@col, row_index=-1, treearraynode=nil, value=@text, leaf=nil, focussed=false, selected=false, expanded=false
    #$log.debug "label :#{@text}, #{value}, #{r}, #{c} col= #{@color}, #{@bgcolor} acolor= #{acolor} j:#{@justify} dlL: #{@display_length} "

  prepare_default_colors focussed, selected

    value=value.to_s # ??
    #icon = object.is_leaf? ? "-" : "+"
    #icon = leaf ? "-" : "+"

    #level = treearraynode.level
    #node = treearraynode.node
    level = treearraynode.level
    node = treearraynode
    if parent.node_expanded? node
      icon = PLUS_MINUS  # can collapse
    else
      icon = PLUS_PLUS   # can expand
    end
    if node.children.size == 0
      icon = PLUS_Q # either no children or not visited yet
      if parent.has_been_expanded node
        icon = PLUS_MINUS # definitely no children, we've visited
      end
    end
    # adding 2 to level, that's the size of icon
    # XXX FIXME if we put the icon here, then when we scroll right, the icon will show, it shoud not
    # FIXME we ignore truncation etc on previous level and take the object as is !!!
    _value =  "%*s %s" % [ level+2, icon,  node.user_object ]
    @actual_length = _value.length
    pcol = @pcol
    if pcol > 0
      _len = @display_length || @parent.width-2
      _value = _value[@pcol..@pcol+_len-1] 
    end
    _value ||= ""
    if @height && @height > 1
    else
      # ensure we do not exceed
      if !@display_length.nil?
        if _value.length > @display_length
          @actual_length = _value.length
          _value = _value[0..@display_length-1]
        end
      end
      #lablist << value
    end
    len = @display_length || _value.length
    graphic.printstring r, c, "%-*s" % [len, _value], @color_pair,@attr
    #_height = @height || 1
    #0.upto(_height-1) { |i| 
      #graphic.printstring r+i, c, ( " " * len) , @color_pair,@attr
    #}
    #lablist.each_with_index do |_value, ix|
      #break if ix >= _height
      #if @justify.to_sym == :center
        #padding = (@display_length - _value.length)/2
        #_value = " "*padding + _value + " "*padding # so its cleared if we change it midway
      #end
      #graphic.printstring r, c, str % [len, _value], @color_pair,@attr
      #r += 1
    #end
end