Class: RubyCurses::Widget

Inherits:
Object show all
Includes:
Io, ConfigSetup, EventHandler, Utils
Defined in:
lib/rbcurse/core/util/app.rb,
lib/rbcurse/core/widgets/rwidget.rb

Overview

TODO - / combo

  • popup

  • promptmenu

  • stack and flow should be objects in Form/App?, put in widget when creating

  • box / rect

  • para looks like a label that is more than one line, and calculates rows itself based on text

  • multicontainer

  • multitextview, multisplit

  • tabbedpane

/ table - more work regarding vim keys, also editable

  • margin - is left offset

    http://lethain.com/entry/2007/oct/15/getting-started-shoes-os-x/

Since:

  • 1.2.0

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Io

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

Methods included from Utils

#OLDdefine_key, #_process_key, #bind_key, #bind_keys, #clean_string!, #define_key, #define_prefix_command, #display_app_help, #get_attrib, #get_color, #keycode_tos, #last_line, #one_line_window, #parse_formatted_text, #print_key_bindings, #repeatm, #run_command, #shell_out, #shell_output, #suspend, #view, #wrap_text

Methods included from ConfigSetup

#cget, #config_setup, #configure, #variable_set

Methods included from EventHandler

#bind, #fire_handler, #fire_property_change

Constructor Details

#initialize(aform, aconfig = {}, &block) ⇒ Widget

Returns a new instance of Widget.

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 825

def initialize aform, aconfig={}, &block
  # I am trying to avoid passing the nil when you don't want to give a form.
  # I hope this does not create new issues 2011-11-20 
  if aform.is_a? Hash
    # presumable there's nothing coming in in hash, or else we will have to merge
    aconfig = aform
    @form = nil
  else
    #raise "got a #{aform.class} "
    @form = aform
  end
  @row_offset ||= 0
  @col_offset ||= 0
  #@ext_row_offset = @ext_col_offset = 0 # 2010-02-07 20:18  # removed on 2011-09-29 
  @state = :NORMAL
  #@attr = nil    # 2011-11-5 i could be removing what's been entered since super is called

  @handler = nil # we can avoid firing if nil
  @event_args = {}
  # These are standard events for most widgets which will be fired by 
  # Form. In the case of CHANGED, form fires if it's editable property is set, so
  # it does not apply to all widgets.
  @_events ||= []
  @_events.push( *[:ENTER, :LEAVE, :CHANGED, :PROPERTY_CHANGE])

  config_setup aconfig # @config.each_pair { |k,v| variable_set(k,v) }
  #instance_eval &block if block_given?
  if block_given?
    if block.arity > 0
      yield self
    else
      self.instance_eval(&block)
    end
  end
  # 2010-09-20 13:12 moved down, so it does not create problems with other who want to set their
  # own default
  #@bgcolor ||=  "black" # 0
  #@color ||= "white" # $datacolor
  set_form(@form) if @form
end

Instance Attribute Details

#_object_created ⇒ Object

widget also has height and width as a method

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 803

def _object_created
  @_object_created
end

#col_offset ⇒ Object (readonly)

where should the cursor be placed to start with

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 792

def col_offset
  @col_offset
end

#cols_panned ⇒ Object

moved from form, how many cols scrolled.panned 2010-02-11 15:26

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 814

def cols_panned
  @cols_panned
end

#config ⇒ Object (readonly)

can be used for popping user objects too

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 789

def config
  @config
end

#curpos ⇒ Object

cursor position inside object - column, not row.

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 788

def curpos
  @curpos
end

#focussed ⇒ Object

sometimes inside a container there’s no way of knowing if an individual comp is in focus other than the explicitly set it and inquire . 2010-09-02 14:47 @since 1.1.5 NOTE state takes care of this and is set by form

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 819

def focussed
  @focussed
end

#form ⇒ Object

made accessor 2008-11-27 22:32 so menu can set

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 790

def form
  @form
end

#id ⇒ Object

, :zorder

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 787

def id
  @id
end

#key_label ⇒ Object (readonly)

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 823

def key_label
  @key_label
end

#parent_component ⇒ Object

attr_accessor :frozen # true false attr_accessor :frozen_list # list of attribs that cannot be changed I think parent_form was not a good idea since i can’t add parent widget offsets + thus we should use parent_comp and push up.

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 809

def parent_component
  @parent_component
end

#row_offset ⇒ Object (readonly)

where should the cursor be placed to start with

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 792

def row_offset
  @row_offset
end

#rows_panned ⇒ Object

tired of getting the cursor wrong and guessing, i am now going to try to get absolute coordinates - 2010-02-07 20:17 this should be updated by parent. attr_accessor :ext_col_offset, :ext_row_offset # 2010-02-07 20:16 to get abs position for cursor rem 2011-09-29

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 813

def rows_panned
  @rows_panned
end

#state ⇒ Object

normal, selected, highlighted

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 791

def state
  @state
end

Instance Method Details

#action_manager ⇒ Object

return an object of actionmanager class, creating if required Widgets and apps may add_action and show_menu using the same

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1229

def action_manager
  require 'rbcurse/core/include/actionmanager'
  @action_manager ||= ActionManager.new
end

#changed(*args, &block) ⇒ Object

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/util/app.rb', line 45

def changed *args, &block
  bind :CHANGED, *args, &block
end

#click(*args, &block) ⇒ Object

actually we already have command() for buttons

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/util/app.rb', line 55

def click *args, &block
  bind :PRESS, *args, &block
end

#color_pair(*val) ⇒ Object

2011-11-12 trying to make color setting a bit sane You may set as a color_pair using get_color which gives a fixnum or you may give 2 color symbols so i can update color, bgcolor and colorpair in one shot if one of them is nil, i just use the existing value

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1194

def color_pair(*val)
  if val.empty?
    return @color_pair
  end

  oldvalue = @color_pair
  case val.size
  when 1
    raise ArgumentError, "Expecting fixnum for color_pair." unless val[0].is_a? Fixnum
    @color_pair = val[0]
    @color, @bgcolor = ColorMap.get_colors_for_pair @color_pair
  when 2
    @color = val.first if val.first
    @bgcolor = val.last if val.last
    @color_pair = get_color $datacolor, @color, @bgcolor
  end
  if oldvalue != @color_pair
    fire_property_change(:color_pair, oldvalue, @color_pair)
    @property_changed = true
    repaint_all true
  end
  self
end

#command(*args, &block) ⇒ Object

a general method for all widgets to override with their favorite or most meaninful event Ideally this is where the block in the constructor should land up.

Since:

  • 1.5.0 2011-11-21



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1220

def command *args, &block
  if @_events.include? :PRESS
    bind :PRESS, *args, &block
  else
    bind :CHANGED, *args, &block
  end
end

#destroy ⇒ Object

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 947

def destroy
  $log.debug "DESTROY : widget #{@name} "
  panel = @window.panel
  Ncurses::Panel.del_panel(panel.pointer) if !panel.nil?   
  @window.delwin if !@window.nil?
end

#enter(*args, &block) ⇒ Object

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/util/app.rb', line 51

def enter *args, &block
  bind :ENTER, *args, &block
end

#event_list ⇒ Object

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1186

def event_list
  return @@events if defined? @@events
  nil
end

#focus ⇒ Object

moves focus to this field we must look into running on_leave of previous field

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1006

def focus
  return if !@focusable
  if @form.validate_field != -1
    @form.select_field @id
  end
end

#get_preferred_size ⇒ Object

Since:

  • 0.1.3



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1034

def get_preferred_size
  return @preferred_height, @preferred_width
end

#getvalue ⇒ Object

return the value of the widget.

In cases where selection is possible, should return selected value/s

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 922

def getvalue
  @text_variable && @text_variable.value || @text
end

#getvalue_for_paint ⇒ Object

Am making a separate method since often value for print differs from actual value

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 927

def getvalue_for_paint
  getvalue
end

#handle_key(ch) ⇒ Object

to be added at end of handle_key of widgets so instlalled actions can be checked

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1028

def handle_key(ch)
  ret = process_key ch, self
  return :UNHANDLED if ret == :UNHANDLED
  0
end

#height(*val) ⇒ val

getter and setter for height - 2009-10-30 12:25 Using dsl_property style SO WE’ve finally succumbed and added height to widget

Parameters:

  • height (val, nil) —

    to set

Returns:

  • (val) —

    earlier height if nil param

Since:

  • 0.1.3



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1089

def height(*val)
  #$log.debug " inside  height() #{val[0]}"
  if val.empty?
    return @height
  else
    #$log.debug " inside #{@name} height()"
    oldvalue = @height || 0 # is this default okay, else later nil cries
    @height = val.size == 1 ? val[0] : val
    newvalue = @height
    @config[:height]=@height
    if oldvalue != newvalue
      @property_changed = true
      fire_property_change(:height, oldvalue, newvalue)
      repaint_all true
    end
  end
end

#height=(val) ⇒ Object

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1106

def height=val
  height(val)
end

#hide ⇒ Object

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 989

def hide
  @visible = false
end

#init_vars ⇒ Object

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 865

def init_vars
  # just in case anyone does a super. Not putting anything here
  # since i don't want anyone accidentally overriding
  @buffer_modified = false 
  #@manages_cursor = false # form should manage it, I will pass row and col to it. 
end

#leave(*args, &block) ⇒ Object

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/util/app.rb', line 48

def leave *args, &block
  bind :LEAVE, *args, &block
end

#modified? ⇒ Boolean

modified

typically read will be overridden to check if value changed from what it was on enter. getter and setter for modified (added 2009-01-18 12:31 )

Returns:

  • (Boolean)

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 876

def modified?
  @modified
end

#move(row, col) ⇒ Object

is this required can we remove

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 999

def move row, col
  @row = row
  @col = col
end

#on_enter ⇒ Object

got left out by mistake 2008-11-26 20:20

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 897

def on_enter
  @state = :HIGHLIGHTED    # duplicating since often these are inside containers
  @focussed = true
  if @handler && @handler.has_key?(:ENTER)
    fire_handler :ENTER, self
  end
end

#on_leave ⇒ Object

got left out by mistake 2008-11-26 20:20

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 905

def on_leave
  @state = :NORMAL    # duplicating since often these are inside containers
  @focussed = false
  if @handler && @handler.has_key?(:LEAVE)
    fire_handler :LEAVE, self
  end
end

#override_graphic(gr) ⇒ Object

When an enclosing component creates a pad (buffer) and the child component + should write onto the same pad, then the enclosing component should override + the default graphic of child. This applies mainly to editor components in + listboxes and tables. added 2010-01-05 15:25

Parameters:

  • graphic —

    graphic object to use for writing contents

See Also:

  • in rlistbox.

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1127

def override_graphic gr
  @graphic = gr
end

#process_key(keycode, object) ⇒ Object

e.g. process_key ch, self returns UNHANDLED if no block for it after form handles basic keys, it gives unhandled key to current field, if current field returns unhandled, then it checks this map.

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1023

def process_key keycode, object
  return _process_key keycode, object, @graphic
end

#remove ⇒ Object

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 995

def remove
  @form.remove_widget(self)
end

#repaint ⇒ Object

default repaint method. Called by form for all widgets.

widget does not have display_length.

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 933

def repaint
    r,c = rowcol
    @bgcolor ||= $def_bg_color # moved down 2011-11-5 
    @color   ||= $def_fg_color
    $log.debug("widget repaint : r:#{r} c:#{c} col:#{@color}" )
    value = getvalue_for_paint
    len = @display_length || value.length
    acolor = @color_pair || get_color($datacolor, @color, @bgcolor)
    @graphic.printstring r, c, "%-*s" % [len, value], acolor, @attr
    # next line should be in same color but only have @att so we can change att is nec
    #@form.window.mvchgat(y=r, x=c, max=len, Ncurses::A_NORMAL, @bgcolor, nil)
    #@buffer_modified = true # required for form to call buffer_to_screen CLEANUP
end

#repaint_all(tf = true) ⇒ Object

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1114

def repaint_all(tf=true)
  @repaint_all = tf
  @repaint_required = tf
end

#repaint_required(tf = true) ⇒ Object

to give simple access to other components, (eg, parent) to tell a comp to either paint its data, or to paint all - borders, headers, footers due to a big change (ht/width)

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1111

def repaint_required(tf=true)
  @repaint_required = tf
end

#rowcol ⇒ Object

row and col is where a widget starts. offsets usually take into account borders. the offsets typically are where the cursor should be positioned inside, upon on_enter.

Returns:

  • row and col of a widget where painting data actually starts

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 916

def rowcol
# $log.debug "widgte rowcol : #{@row+@row_offset}, #{@col+@col_offset}"
  return @row+@row_offset, @col+@col_offset
end

#set_buffer_modified(tf = true) ⇒ Object

Inform the system that the buffer has been modified and should be blitted over the screen or copied to parent.

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1042

def set_buffer_modified(tf=true)
  @buffer_modified = tf
end

#set_buffering(params) ⇒ Object

I was removing this altogether but vimsplit needs this, or masterdetail gives form and window to vimsplit. So i ‘ve removed everything but the form and window setting. 2011-09-29 SETBUFF move from TextView parameters relating to buffering - new 2010-02-12 12:09 RFED16 I am merging so i can call multiple times WARNING NOTE : this does not set Pad’s top and left since Pad may not be created yet, or at all

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1177

def set_buffering params

  @target_window ||= params[:target_window]
  @form = params[:form] unless @form
  if @graphic.nil? 
    @graphic = @target_window
  end
end

#set_form(form) ⇒ Object

in those cases where we create widget without a form, and later give it to some other program which sets the form. Dirty, we should perhaps create widgets without forms, and add explicitly.

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 956

def set_form form
  raise "Form is nil in set_form" if form.nil?
  @form = form
  @id = form.add_widget(self) if !form.nil? and form.respond_to? :add_widget
  # 2009-10-29 15:04 use form.window, unless buffer created
  # should not use form.window so explicitly everywhere.
  # added 2009-12-27 20:05 BUFFERED in case child object needs a form.
  # We don;t wish to overwrite the graphic object
  if @graphic.nil?
    #$log.debug " setting graphic to form window for #{self.class}, #{form} "
    @graphic = form.window unless form.nil? # use screen for writing, not buffer
  end
end

#set_form_col(col1 = @curpos) ⇒ Object

set cursor on correct column, widget Ideally, this should be overriden, as it is not likely to be correct. NOTE: this is okay for some widgets but NOT for containers that will call their own components SFR and SFC

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 982

def set_form_col col1=@curpos
  @curpos = col1 || 0 # 2010-01-14 21:02 
  #@form.col = @col + @col_offset + @curpos
  c = @col + @col_offset + @curpos
  $log.warn " #{@name} empty set_form_col #{c}, curpos #{@curpos}  , #{@col} + #{@col_offset} #{@form} "
  setrowcol nil, c
end

#set_form_row ⇒ Object

puts cursor on correct row.

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 970

def set_form_row
#  @form.row = @row + 1 + @winrow
  #@form.row = @row + 1 
  r, c = rowcol
  $log.warn " empty set_form_row in widget #{self} r = #{r} , c = #{c}  "
  #raise "trying to set 0, maybe called repaint before container has set value" if row <= 0
  setrowcol row, nil
end

#set_modified(tf = true) ⇒ Object Also known as: modified

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 879

def set_modified tf=true
  @modified = tf
  @form.modified = true if tf
end

#setformrowcol(r, c) ⇒ Object

passing a cursor up and adding col and row offsets Added 2010-01-13 13:27 I am checking this out. I would rather pass the value down and store it than do this recursive call + for each cursor display

See Also:

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1136

def setformrowcol r, c
      @form.row = r unless r.nil?
      @form.col = c unless c.nil?
      # this is stupid, going through this route i was losing windows top and left
      # And this could get repeated if there are mult objects. 
   if !@parent_component.nil? and @parent_component != self
      r+= @parent_component.form.window.top unless  r.nil?
      c+= @parent_component.form.window.left unless c.nil?
      $log.debug " (#{@name}) calling parents setformrowcol #{r}, #{c} pa: #{@parent_component.name} self: #{name}, #{self.class}, poff #{@parent_component.row_offset}, #{@parent_component.col_offset}, top:#{@form.window.left} left:#{@form.window.left} "
      @parent_component.setformrowcol r, c
   else
      # no more parents, now set form
      $log.debug " name NO MORE parents setting #{r}, #{c}    in #{@form} "
      @form.setrowcol r, c
   end
end

#setrowcol(r, c) ⇒ Object

widget: i am putting one extra level of indirection so i can switch here between form#setrowcol and setformrowcol, since i am not convinced either are giving the accurate result. i am not sure what the issue is.

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1155

def setrowcol r, c
    # 2010-02-07 21:32 is this where i should add ext_offsets
   #$log.debug " #{@name}  w.setrowcol #{r} + #{@ext_row_offset}, #{c} + #{@ext_col_offset}  "
   # commented off 2010-02-15 18:22 
   #r += @ext_row_offset unless r.nil?
   #c += @ext_col_offset unless c.nil?
   if @form
     @form.setrowcol r, c
   #elsif @parent_component
   else
     raise "Parent component not defined for #{self}, #{self.class} " unless @parent_component
     @parent_component.setrowcol r, c
   end
   #setformrowcol r,c 
end

#show ⇒ Object

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 992

def show
  @visible = true
end

#text_variable(*val) ⇒ Object

getter and setter for text_variable

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 886

def text_variable(*val)
  if val.empty?
    @text_variable
  else
    @text_variable = val[0] 
    $log.debug " GOING TO CALL ADD DELPENDENT #{self}"
    @text_variable.add_dependent(self)
  end
end

#unbind_key(keycode) ⇒ Object

remove a binding that you don’t want

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1014

def unbind_key keycode
  @key_args.delete keycode unless @key_args.nil?
  @key_handler.delete keycode unless @key_handler.nil?
end

#width(*val) ⇒ val

getter and setter for width - 2009-10-29 22:45 Using dsl_property style

Parameters:

  • value (val, nil) —

    to set

Returns:

  • (val) —

    earlier value if nil param

Since:

  • 0.1.3



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1056

def width(*val)
  #$log.debug " inside  width() #{val}"
  if val.empty?
    return @width
  else
    #$log.debug " inside  width()"
    oldvalue = @width || 0 # is this default okay, else later nil cries
    #@width = val.size == 1 ? val[0] : val
    @width = val[0]
    newvalue = @width
    @config["width"]=@width
    if oldvalue != newvalue
      @property_changed = true
      fire_property_change(:width, oldvalue, newvalue)
      repaint_all(true)  # added 2010-01-08 18:51 so widgets can redraw everything.
    end
    #if is_double_buffered? and newvalue != oldvalue # removed on 2011-09-29 
      #$log.debug " #{@name} w calling resize of screen buffer with #{newvalue}. WARNING: does not change buffering_params"
      #@screen_buffer.resize(0, newvalue)
    #end
  end
end

#width=(val) ⇒ Object

Since:

  • 1.2.0



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# File 'lib/rbcurse/core/widgets/rwidget.rb', line 1078

def width=val
  width(val)
end