Class: Canis::Divider

Inherits:
Widget show all
Defined in:
lib/canis/core/widgets/divider.rb

Overview

This is a horizontal or vertical bar (like a scrollbar), at present attached to a widget that is focusable, and allows user to press arrow keys. It highlights on focus, the caller can expand and contract components in a container or even screen, based on arrow movements. This allows for a visual resizing of components. NOTE: since this can be deactivated, containers need to check focusable before passing focus in

2010-10-07 23:56 made focusable false by default. Add divider to
FocusManager when creating, so F3 can be used to set focusable
See rvimsplit.rb for example

Examples:

lb = list_box ....
rb = Divider.new @form, :parent => lb, :side => :right

Since:

  • 1.2.0

Instance Attribute Summary

Attributes inherited from Widget

#_object_created, #col_offset, #config, #curpos, #focussed, #form, #handler, #id, #key_label, #parent_component, #row_offset, #state

Instance Method Summary collapse

Methods inherited from Widget

#action_manager, #bgcolor, #color, #color_pair, #command, #destroy, #focus, #focusable, #focusable?, #getvalue, #getvalue_for_paint, #hide, #init_vars, #modified?, #move, #override_graphic, #process_key, #property_set, #remove, #repaint_all, #repaint_required, #rowcol, #set_form, #set_modified, #setformrowcol, #setrowcol, #show, #unbind_key

Methods included from Io

#__create_footer_window, #clear_this, #get_file, #print_this, #rb_getchar, #rb_gets, #rb_getstr, #warn

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

Methods included from EventHandler

#bind, #event?, #event_list, #fire_handler, #fire_property_change, #register_events

Constructor Details

#initialize(form, config = {}, &block) ⇒ Divider

TODO: if parent passed, we shold bind to ON_ENTER and get current_index, so no extra work is required.

Since:

  • 1.2.0



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# File 'lib/canis/core/widgets/divider.rb', line 51

def initialize form, config={}, &block

  # setting default first or else Widget will place its BW default
  #@color, @bgcolor = ColorMap.get_colors_for_pair $bottomcolor
  super
  @height = 1
  @color_pair = get_color $datacolor, @color, @bgcolor
  @scroll_pair = get_color $bottomcolor, :green, :white
  #@window = form.window
  @editable = false
  # you can set to true upon creation, or use F3 on vimsplit to
  # toggle focusable
  @focusable = false
  @repaint_required = true
  @_events.push(:DRAG_EVENT)
  map_keys
  unless @parent
    raise ArgumentError, "row col and length should be provided" if !@row || !@col || !@length
  end
  #if @parent
    #@parent.bind :ENTER_ROW do |p|
      ## parent must implement row_count, and have a @current_index
      #raise StandardError, "Parent must implement row_count" unless p.respond_to? :row_count
      #self.current_index = p.current_index
      #@repaint_required = true  #requred otherwise at end when same value sent, prop handler
      ## will not be fired (due to optimization).
    #end
  #end
end

Instance Method Details

#convert_attrib_to_sym(attr) ⇒ Object

Since:

  • 1.2.0



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# File 'lib/canis/core/widgets/divider.rb', line 159

def convert_attrib_to_sym attr
  case attr
  when 'reverse'
    Ncurses::A_REVERSE
  when 'bold'
    Ncurses::A_BOLD
  when 'normal'
    Ncurses::A_NORMAL
  when 'blink'
    Ncurses::A_BLINK
  when 'underline'
    Ncurses::A_UNDERLINE
  else
    Ncurses::A_REVERSE
  end
end

#deactivate_all(tf = true) ⇒ Object

deactivate all dividers The application has to provide a key or button to activate all or just this one.

Since:

  • 1.2.0



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# File 'lib/canis/core/widgets/divider.rb', line 178

def deactivate_all  tf=true
  $deactivate_dividers = tf
  @focusable = !tf
end

#h? ⇒ Boolean

is this a horizontal divider

Returns:

  • (Boolean)

Since:

  • 1.2.0



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# File 'lib/canis/core/widgets/divider.rb', line 255

def h?
  @side == :right || @side == :left
end

#handle_key(ch) ⇒ Object

Since:

  • 1.2.0



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# File 'lib/canis/core/widgets/divider.rb', line 182

def handle_key ch
  # all dividers have been deactivated
  if $deactivate_dividers || !@focusable
    @focusable = false
    return :UNHANDLED
  end
  case @side
  when :right, :left
    case ch
    when KEY_RIGHT
      fire_handler :DRAG_EVENT, DragEvent.new(self, ch)
    when KEY_LEFT
      fire_handler :DRAG_EVENT, DragEvent.new(self, ch)
    else
      ret = process_key ch, self
      return ret if ret == :UNHANDLED
    end
    set_form_col
  when :top, :bottom
    case ch
    when KEY_UP
      fire_handler :DRAG_EVENT, DragEvent.new(self, ch)
    when KEY_DOWN
      fire_handler :DRAG_EVENT, DragEvent.new(self, ch)
    else
      ret = process_key ch, self
      return ret if ret == :UNHANDLED
    end
    set_form_col
  else
  end
  @repaint_required = true
  return 0
end

#map_keys ⇒ Object

end

Since:

  • 1.2.0



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# File 'lib/canis/core/widgets/divider.rb', line 80

def map_keys
  if !defined? $deactivate_dividers
    $deactivate_dividers = false
  end
  # deactivate only this bar
  bind_key(?f) {@focusable=false; }
  # deactivate all bars, i've had nuff!
  bind_key(?F) {deactivate_all(true)}
end

#on_enter ⇒ Object

Since:

  • 1.2.0



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# File 'lib/canis/core/widgets/divider.rb', line 216

def on_enter
  if $deactivate_dividers || !@focusable
    @focusable = false
    return :UNHANDLED
  end
  # since it is over border of component, we need to repaint
  @focussed = true
  @repaint_required = true
  repaint
end

#on_leave ⇒ Object

Since:

  • 1.2.0



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# File 'lib/canis/core/widgets/divider.rb', line 226

def on_leave
  @focussed = false
  @repaint_required = true
  repaint
  # TODO: we should review this since its not over the parent any longer
  if @parent
    # since it is over border of component, we need to clear
    @parent.repaint_required 
    # if we don't paint now, parent paints over other possible dividers
    @parent.repaint
  end
end

#repaint ⇒ Object

repaint the scrollbar Taking the data from parent as late as possible in case parent resized, or moved around by a container. NOTE: sometimes if this is inside another object, the divider repaints but then is wiped out when that objects print_border is called. So such an obkect (e.g. vimsplit) should call repaint after its has done its own repaint. that does mean the repaint happens twice during movement

Since:

  • 1.2.0



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# File 'lib/canis/core/widgets/divider.rb', line 98

def repaint
  woffset = 2
  coffset = 1

  # 2016-01-14 - replacing 1 with space since junk is showing up in some cases (in mvvline/mvhline)
  space_char = " ".codepoints.first

  if @parent
    woffset = 0 if @parent.suppress_borders
    @border_attrib ||= @parent.border_attrib
    case @side
    when :right
      @row = @parent.row+1
      @col = @parent.col + @parent.width - 0
      @length = @parent.height - woffset
    when :left
      @row = @parent.row+1
      @col = @parent.col+0 #+ @parent.width - 1
      @length = @parent.height - woffset
    when :top
      @row = @parent.row+0
      @col = @parent.col + @parent.col_offset #+ @parent.width - 1
      @length = @parent.width - woffset
    when :bottom
      @row = @parent.row+@parent.height-0 #1
      @col = @parent.col+@parent.col_offset #+ @parent.width - 1
      @length = @parent.width - woffset
    end
  else
    # row, col and length should be passed
  end
  my_win = @form ? @form.window : @target_window
  @graphic = my_win unless @graphic
  raise "graphic is nil in divider, perhaps form was nil when creating" unless @graphic
  return unless @repaint_required

  # first print a right side vertical line
  #bc = $bottomcolor  # dark blue
  bc = get_color($datacolor, :cyan, :black)
  bordercolor = @border_color || bc
  borderatt = @border_attrib || Ncurses::A_REVERSE
  if @focussed 
    bordercolor = $promptcolor || bordercolor
  end

  borderatt = convert_attrib_to_sym(borderatt) if borderatt.is_a? Symbol

  @graphic.attron(Ncurses.COLOR_PAIR(bordercolor) | borderatt)
  $log.debug " XXX DIVIDER #{@row} #{@col} #{@length} "
  case @side
  when :right, :left
    @graphic.mvvline(@row, @col, space_char, @length)
  when :top, :bottom
    @graphic.mvhline(@row, @col, space_char, @length)
  end
  @graphic.attroff(Ncurses.COLOR_PAIR(bordercolor) | borderatt)
  _paint_marker
  #alert "divider repaint at #{row} #{col} "

  @repaint_required = false
end

#set_form_col ⇒ Object

set the cursor on first point of bar

Since:

  • 1.2.0



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# File 'lib/canis/core/widgets/divider.rb', line 244

def set_form_col
  return unless @focusable
  # need to set it to first point, otherwise it could be off the widget
  r,c = rowcol
  setrowcol r, c
end

#set_form_row ⇒ Object

Since:

  • 1.2.0



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# File 'lib/canis/core/widgets/divider.rb', line 238

def set_form_row
  return unless @focusable
  r,c = rowcol
  setrowcol r, c
end

#v? ⇒ Boolean

is this a vertical divider

Returns:

  • (Boolean)

Since:

  • 1.2.0



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# File 'lib/canis/core/widgets/divider.rb', line 251

def v?
  @side == :top || @side == :bottom
end