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#
# vdr-scripting - A plugin for the Linux Video Disk Recorder
# Copyright (c) 2009 Tobias Grimm <vdr@e-tobi.net>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
#
module Vdr
module Osd
#
# The Menu class represents a basic OSD menu with a title
# and a bunch of items.
#
class Menu < Vdr::Swig::COsdMenu
# The title of the menu
attr_reader :title
# Creates a new menu, optionally with the given _title_
def initialize(title=nil) # :yields: menu
@title = title
super(@title)
@items = []
@red_help = @green_help = @yellow_help = @blue_help = nil
@keypress_event_handler = {}
yield(self) if block_given?
end
# Sets the _title_ of the menu
def title=(title)
@title = title
set_title(@title)
end
# Adds the Item _item_ to the menu
def add_item(item)
@items << item
add(item)
end
# Item reference returning an Item by index
def [](index)
return @items[index]
end
# Opens the given _menu_ as a sub menu
def open_sub_menu(menu)
add_sub_menu(menu)
end
# Request to close the menu
def close
@close_request = :close
end
# Request to close all menus
def close_all
@close_request = :close_all
end
# Create and add a new item with the given _title_ and returns the added
# Item
def add_new_item(title)
item = Item.new(title)
add_item(item)
return item
end
# Sets the help text for the red button
def red_help=(text)
@red_help = text
update_help_texts
end
# Sets the help text for the green button
def green_help=(text)
@green_help = text
update_help_texts
end
# Sets the help text for the yellow button
def yellow_help=(text)
@yellow_help = text
update_help_texts
end
# Sets the help text for the blue button
def blue_help=(text)
@blue_help = text
update_help_texts
end
#
# Sets an event handler for the key press event. If _key_ is not
# given, the event handler will be called for any key, otherwise
# just for the specific key. In the latter case, no parameter is
# passed to the event handler.
#
# menu.on_keypress do |key|
# case key
# when :key_red
# puts "Red key pressed"
# when :key_yellow
# puts "Yellow key pressed"
# end
# end
#
# menu.on_keypress(:key_red) { puts 'Red key pressed' }
#
def on_keypress(key=:key_any, &event_handler) # :yield: key
@keypress_event_handler[key] = event_handler
end
# Deletes all menu items
def clear
super
end
# Refresh the menu. This must be called, when the menu has been changed.
def refresh
display
end
protected
def process_key(key) # :nodoc:
state = super(key)
case @close_request
when :close
return Vdr::Swig::OsBack
when :close_all
return Vdr::Swig::OsEnd
end
key_symbol = KEYMAP[key]
if @keypress_event_handler[:key_any]
@keypress_event_handler[:key_any].call(key_symbol)
end
if @keypress_event_handler[key_symbol]
@keypress_event_handler[key_symbol].call
end
return state
end
private
KEYMAP =
{
Vdr::Swig::KRed => :key_red,
Vdr::Swig::KGreen => :key_green,
Vdr::Swig::KYellow => :key_yellow,
Vdr::Swig::KBlue => :key_blue,
}
def update_help_texts
set_help(@red_help, @green_help, @yellow_help, @blue_help)
end
end
end
end
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