Class: Canis::Widget
- Includes:
- ConfigSetup, EventHandler, Io, Utils
- Defined in:
- lib/canis/core/widgets/rwidget.rb
Overview
{{{
Direct Known Subclasses
ApplicationHeader, Box, Button, Container, Divider, Field, KeyLabelPrinter, Label, List, Progress, Scrollbar, StatusLine, TabbedPane, TabularWidget, TextArea, TextPad, TextView, Tree
Instance Attribute Summary collapse
-
#_object_created ⇒ Object
2010-09-16 12:12 to prevent needless property change firing when object being set.
-
#col_offset ⇒ Object
readonly
where should the cursor be placed to start with.
-
#config ⇒ Object
readonly
can be used for popping user objects too.
-
#curpos ⇒ Object
cursor position inside object - column, not row.
-
#focussed ⇒ Object
sometimes inside a container there’s no way of knowing if an individual comp is in focus other than to explicitly set it and inquire .
-
#form ⇒ Object
made accessor 2008-11-27 22:32 so menu can set.
-
#handler ⇒ Object
readonly
event handler.
-
#id ⇒ Object
, :zorder.
-
#key_label ⇒ Object
readonly
descriptions for each key set in _key_map.
-
#parent_component ⇒ Object
added 2010-01-12 23:28 BUFFERED - to bubble up.
-
#row_offset ⇒ Object
readonly
where should the cursor be placed to start with.
-
#state ⇒ Object
normal, selected, highlighted.
Instance Method Summary collapse
-
#action_manager ⇒ Object
return an object of actionmanager class, creating if required Widgets and apps may add_action and show_menu using the same.
-
#bgcolor(*val) ⇒ Object
returns widgets bgcolor, or form’s color.
-
#color(*val) ⇒ Object
returns widgets color, or if not set then app default Ideally would have returned form’s color, but it seems that form does not have color any longer.
-
#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.
-
#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.
- #destroy ⇒ Object
-
#focus ⇒ Object
moves focus to this field we must look into running on_leave of previous field.
-
#focusable(*val) ⇒ Object
set or unset focusable (boolean).
-
#focusable? ⇒ Boolean
is this widget accessible from keyboard or not.
-
#getvalue ⇒ Object
return the value of the widget.
-
#getvalue_for_paint ⇒ Object
Am making a separate method since often value for print differs from actual value.
-
#handle_key(ch) ⇒ Object
to be added at end of handle_key of widgets so instlalled actions can be checked.
- #hide ⇒ Object
- #init_vars ⇒ Object
-
#initialize(aform, aconfig = {}, &block) ⇒ Widget
constructor
A new instance of Widget.
-
#modified? ⇒ Boolean
modified.
-
#move(row, col) ⇒ Object
is this required can we remove.
-
#on_enter ⇒ Object
got left out by mistake 2008-11-26 20:20.
-
#on_leave ⇒ Object
Called when user exits a widget.
-
#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.
-
#process_key(keycode, object) ⇒ Object
e.g.
-
#property_set(sym, val) ⇒ Object
this is supposed to be a duplicate of what dsl_property generates for cases when we need to customise the get portion but not copy the set part.
- #remove ⇒ Object
-
#repaint ⇒ Object
default repaint method.
- #repaint_all(tf = true) ⇒ Object
-
#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).
-
#rowcol ⇒ Object
row and col is where a widget starts.
-
#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.
-
#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.
-
#set_form_row ⇒ Object
puts cursor on correct row.
- #set_modified(tf = true) ⇒ Object (also: #modified)
-
#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.
-
#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.
- #show ⇒ Object
-
#unbind_key(keycode) ⇒ Object
remove a binding that you don’t want.
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
Methods included from EventHandler
#bind, #event?, #event_list, #fire_handler, #fire_property_change, #register_events
Constructor Details
#initialize(aform, aconfig = {}, &block) ⇒ Widget
Returns a new instance of Widget.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1128 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 @handler = nil # we can avoid firing if nil #@event_args = {} # 2014-04-22 - 18:47 declared in bind_key # 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. register_events( [: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
2010-09-16 12:12 to prevent needless property change firing when object being set
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# File 'lib/canis/core/widgets/rwidget.rb', line 1112 def _object_created @_object_created end |
#col_offset ⇒ Object (readonly)
where should the cursor be placed to start with
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# File 'lib/canis/core/widgets/rwidget.rb', line 1106 def col_offset @col_offset end |
#config ⇒ Object (readonly)
can be used for popping user objects too
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# File 'lib/canis/core/widgets/rwidget.rb', line 1103 def config @config end |
#curpos ⇒ Object
cursor position inside object - column, not row.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1102 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 to 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. boolean
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# File 'lib/canis/core/widgets/rwidget.rb', line 1119 def focussed @focussed end |
#form ⇒ Object
made accessor 2008-11-27 22:32 so menu can set
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# File 'lib/canis/core/widgets/rwidget.rb', line 1104 def form @form end |
#handler ⇒ Object (readonly)
event handler
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# File 'lib/canis/core/widgets/rwidget.rb', line 1126 def handler @handler end |
#id ⇒ Object
, :zorder
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# File 'lib/canis/core/widgets/rwidget.rb', line 1101 def id @id end |
#key_label ⇒ Object (readonly)
descriptions for each key set in _key_map
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# File 'lib/canis/core/widgets/rwidget.rb', line 1125 def key_label @key_label end |
#parent_component ⇒ Object
added 2010-01-12 23:28 BUFFERED - to bubble up
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# File 'lib/canis/core/widgets/rwidget.rb', line 1114 def parent_component @parent_component end |
#row_offset ⇒ Object (readonly)
where should the cursor be placed to start with
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# File 'lib/canis/core/widgets/rwidget.rb', line 1106 def row_offset @row_offset end |
#state ⇒ Object
normal, selected, highlighted
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# File 'lib/canis/core/widgets/rwidget.rb', line 1105 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
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# File 'lib/canis/core/widgets/rwidget.rb', line 1508 def action_manager require 'canis/core/include/actionmanager' @action_manager ||= ActionManager.new end |
#bgcolor(*val) ⇒ Object
returns widgets bgcolor, or form’s color. This ensures that all widgets use form’s color
unless user has overriden the color.
This is to be used whenever a widget is rendering to check the color at this moment.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1211 def bgcolor( *val ) if val.empty? return @bgcolor if @bgcolor return @form.bgcolor if @form return $def_bg_color else @color_pair = nil return property_set :bgcolor, val end end |
#color(*val) ⇒ Object
returns widgets color, or if not set then app default Ideally would have returned form’s color, but it seems that form does not have color any longer.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1198 def color( *val ) if val.empty? return @color if @color return @form.color if @form return $def_fg_color else @color_pair = nil return property_set :color, val end end |
#color_pair(*val) ⇒ Object
2011-11-12 trying to make color setting a bit sane You may set as a color_pair using get_color which gives a fixnum or you may give 2 color symbols so i can update color, bgcolor and colorpair in one shot if one of them is nil, i just use the existing value
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# File 'lib/canis/core/widgets/rwidget.rb', line 1472 def color_pair(*val) if val.empty? #return @color_pair return @color_pair || get_color($datacolor, color(), bgcolor()) end oldvalue = @color_pair case val.size when 1 raise ArgumentError, "Expecting fixnum for color_pair." unless val[0].is_a? Integer @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.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1499 def command *args, &block if event? :PRESS bind :PRESS, *args, &block else bind :CHANGED, *args, &block end end |
#destroy ⇒ Object
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# File 'lib/canis/core/widgets/rwidget.rb', line 1289 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 |
#focus ⇒ Object
moves focus to this field we must look into running on_leave of previous field
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# File 'lib/canis/core/widgets/rwidget.rb', line 1352 def focus return if !@focusable if @form.validate_field != -1 @form.select_field @id end end |
#focusable(*val) ⇒ Object
set or unset focusable (boolean). Whether a widget can get keyboard focus.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1359 def focusable(*val) return @focusable if val.empty? oldv = @focusable @focusable = val[0] return self if oldv.nil? || @_object_created.nil? # once the form has been painted then any changes will trigger update of focusables. @form.update_focusables if @form # actually i should only set the forms focusable_modified flag rather than call this. FIXME self end |
#focusable? ⇒ Boolean
is this widget accessible from keyboard or not.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1372 def focusable? @focusable end |
#getvalue ⇒ Object
return the value of the widget.
In cases where selection is possible, should return selected value/s
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# File 'lib/canis/core/widgets/rwidget.rb', line 1262 def getvalue #@text_variable && @text_variable.value || @text @text end |
#getvalue_for_paint ⇒ Object
Am making a separate method since often value for print differs from actual value
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# File 'lib/canis/core/widgets/rwidget.rb', line 1268 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
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# File 'lib/canis/core/widgets/rwidget.rb', line 1391 def handle_key(ch) ret = process_key ch, self return :UNHANDLED if ret == :UNHANDLED 0 end |
#hide ⇒ Object
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# File 'lib/canis/core/widgets/rwidget.rb', line 1335 def hide @visible = false end |
#init_vars ⇒ Object
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# File 'lib/canis/core/widgets/rwidget.rb', line 1166 def init_vars # just in case anyone does a super. Not putting anything here # since i don't want anyone accidentally overriding 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 )
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# File 'lib/canis/core/widgets/rwidget.rb', line 1227 def modified? @modified end |
#move(row, col) ⇒ Object
is this required can we remove
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# File 'lib/canis/core/widgets/rwidget.rb', line 1345 def move row, col @row = row @col = col end |
#on_enter ⇒ Object
got left out by mistake 2008-11-26 20:20
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# File 'lib/canis/core/widgets/rwidget.rb', line 1237 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
Called when user exits a widget
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# File 'lib/canis/core/widgets/rwidget.rb', line 1245 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
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# File 'lib/canis/core/widgets/rwidget.rb', line 1417 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.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1386 def process_key keycode, object return _process_key keycode, object, @graphic end |
#property_set(sym, val) ⇒ Object
this is supposed to be a duplicate of what dsl_property generates for cases when
we need to customise the get portion but not copy the set part. just call this.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1172 def property_set sym, val oldvalue = instance_variable_get "@#{sym}" tmp = val.size == 1 ? val[0] : val newvalue = tmp if oldvalue.nil? || @_object_created.nil? #@#{sym} = tmp instance_variable_set "@#{sym}", tmp end return(self) if oldvalue.nil? || @_object_created.nil? if oldvalue != newvalue # trying to reduce calls to fire, when object is being created begin @property_changed = true fire_property_change("#{sym}", oldvalue, newvalue) if !oldvalue.nil? #@#{sym} = tmp instance_variable_set "@#{sym}", tmp #@config["#{sym}"]=@#{sym} rescue PropertyVetoException $log.warn "PropertyVetoException for #{sym}:" + oldvalue.to_s + "-> "+ newvalue.to_s end end # if old self end |
#remove ⇒ Object
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# File 'lib/canis/core/widgets/rwidget.rb', line 1341 def remove @form.(self) end |
#repaint ⇒ Object
default repaint method. Called by form for all widgets.
widget does not have display_length.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1274 def repaint r,c = rowcol #@bgcolor ||= $def_bg_color # moved down 2011-11-5 #@color ||= $def_fg_color _bgcolor = bgcolor() _color = color() $log.debug("widget repaint : r:#{r} c:#{c} col:#{_color}" ) value = getvalue_for_paint len = @width || value.length acolor = @color_pair || get_color($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) end |
#repaint_all(tf = true) ⇒ Object
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# File 'lib/canis/core/widgets/rwidget.rb', line 1404 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)
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# File 'lib/canis/core/widgets/rwidget.rb', line 1401 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.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1256 def rowcol # $log.debug "widgte rowcol : #{@row+@row_offset}, #{@col+@col_offset}" return @row+@row_offset, @col+@col_offset end |
#set_form(form) ⇒ Object
in those cases where we create widget without a form, and later give it to some other program which sets the form. Dirty, we should perhaps create widgets without forms, and add explicitly.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1298 def set_form form raise "Form is nil in set_form" if form.nil? @form = form @id = form.(self) if !form.nil? and form.respond_to? :add_widget # 2009-10-29 15:04 use form.window, unless buffer created # should not use form.window so explicitly everywhere. # added 2009-12-27 20:05 BUFFERED in case child object needs a form. # We don;t wish to overwrite the graphic object if @graphic.nil? #$log.debug " setting graphic to form window for #{self.class}, #{form} " @graphic = form.window unless form.nil? # use screen for writing, not buffer end # execute those actions delayed due to absence of form -- used internally # mostly by buttons and labels to bind hotkey to form fire_handler(:FORM_ATTACHED, self) if event? :FORM_ATTACHED 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
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# File 'lib/canis/core/widgets/rwidget.rb', line 1328 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 #$log.warn " #{@name} empty set_form_col #{c}, curpos #{@curpos} , #{@col} + #{@col_offset} #{@form} " setrowcol nil, c end |
#set_form_row ⇒ Object
puts cursor on correct row.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1316 def set_form_row # @form.row = @row + 1 + @winrow #@form.row = @row + 1 r, c = rowcol #$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
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# File 'lib/canis/core/widgets/rwidget.rb', line 1230 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
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# File 'lib/canis/core/widgets/rwidget.rb', line 1426 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 $log.debug " name NO MORE parents setting #{r}, #{c} in #{@form} " @form.setrowcol r, c end end |
#setrowcol(r, c) ⇒ Object
widget: i am putting one extra level of indirection so i can switch here between form#setrowcol and setformrowcol, since i am not convinced either are giving the accurate result. i am not sure what the issue is.
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# File 'lib/canis/core/widgets/rwidget.rb', line 1445 def setrowcol r, c # 2010-02-07 21:32 is this where i should add ext_offsets #$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
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# File 'lib/canis/core/widgets/rwidget.rb', line 1338 def show @visible = true end |
#unbind_key(keycode) ⇒ Object
remove a binding that you don’t want
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# File 'lib/canis/core/widgets/rwidget.rb', line 1377 def unbind_key keycode @_key_args.delete keycode unless @_key_args.nil? @_key_map.delete keycode unless @_key_map.nil? end |