Class: Cosmos::LimitsMonitor

Inherits:
QtTool show all
Defined in:
lib/cosmos/tools/limits_monitor/limits_monitor.rb

Overview

The LimitsMonitor application displays all the out of limits items encountered by the COSMOS server. It provides the ability to ignore and restore limits as well as logs all limits events.

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from QtTool

#about, #complete_initialize, create_default_options, graceful_kill, #initialize_actions, #initialize_help_menu, post_options_parsed_hook, pre_window_new_hook, redirect_io, restore_io

Constructor Details

#initialize(options) ⇒ LimitsMonitor

Set up class variables, tab-book with main panel and log panel, menus, and status bar on main panel.

Parameters:

  • options (Options) —

    Contains the options for the window.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 63

def initialize(options)
  super(options)
  Cosmos.load_cosmos_icon("limits_monitor.png")

  @out_of_limits_items = []
  @queue_id = nil
  @limits_set = nil
  @widgets = []
  @widget_hframes = []
  @value_limits_set = nil
  @items = []
  @new_items = []
  @initialized = false
  @overall_limits_state = :STALE
  @ignored_items = []
  @ignored_filename = nil
  @colorblind = false
  @new_widgets = []
  @buttons = []
  @cancel_thread = false
  @limits_sleeper = Sleeper.new
  @value_sleeper = Sleeper.new

  statusBar.showMessage(tr(""))

  initialize_actions()
  initialize_menus()
  complete_initialize()

  @tabbook = Qt::TabWidget.new(self)
  setCentralWidget(@tabbook)
  @widget = Qt::Widget.new
  @layout = Qt::VBoxLayout.new(@widget)

  @monitored_state_text_field = Qt::LineEdit.new(self)
  @monitored_state_text_field.setText('Stale')
  @monitored_state_text_field.setAlignment(Qt::AlignCenter)
  @monitored_state_text_field.setReadOnly(true)
  @palette = Qt::Palette.new()
  @palette.setColor(Qt::Palette::Base, Qt::Color.new(255,0,255))
  @monitored_state_text_field.setPalette(@palette)
  @state_label = Qt::Label.new('Monitored Limits State: ')

  @monitored_state_frame = Qt::HBoxLayout.new
  @monitored_state_frame.addWidget(@state_label)
  @monitored_state_frame.addWidget(@monitored_state_text_field)
  label = Qt::Label.new
  filename = File.join(::Cosmos::PATH, 'data', 'spinner.gif')
  movie = Qt::Movie.new(filename)
  label.setMovie(movie)
  movie.start
  @monitored_state_frame.addWidget(label)

  @monitored_state_frame.setAlignment(Qt::AlignTop)

  @scroll = Qt::ScrollArea.new
  @scroll_widget = Qt::Widget.new
  @scroll_layout = Qt::VBoxLayout.new(@scroll_widget)
  @scroll_layout.setSizeConstraint(Qt::Layout::SetMinAndMaxSize)

  @scroll.setWidget(@scroll_widget)

  @layout.addLayout(@monitored_state_frame)
  @layout.addWidget(@scroll)

  @log_output = Qt::PlainTextEdit.new
  @log_output.setReadOnly(true)
  @log_output.setMaximumBlockCount(10000)

  @tabbook.addTab(@widget, "Limits")
  @tabbook.addTab(@log_output, "Log")

  # Process config file if present
  process_config(File.join(::Cosmos::USERPATH, 'config', 'tools', 'limits_monitor', options.config_file)) if options.config_file

  # Start thread to monitor limits
  value_thread()
  limits_thread()
end

Class Method Details

.run(option_parser = nil, options = nil) ⇒ Object

Initialize tool options.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 772

def self.run(option_parser = nil, options = nil)
  Cosmos.catch_fatal_exception do
    unless option_parser and options
      option_parser, options = create_default_options()
      options.width = 600
      options.height = 500
      options.remember_geometry = false
      options.title = "Limits Monitor"
      options.auto_size = false
      options.config_file = nil
      options.production = false
      options.no_prompt = false
      option_parser.separator "Limits Monitor Specific Options:"
      option_parser.on("-c", "--config FILE", "Use the specified configuration file") do |arg|
        options.config_file = arg
      end
    end

    super(option_parser, options)
  end
end

Instance Method Details

#add_items(target_name, packet_name, item_name) ⇒ Object

Slot to add items to the front panel when they are out of limits.

Parameters:

  • target_name (String) —

    Target name of out of limits item.

  • packet_name (String) —

    Packet name of out of limits item.

  • item_name (String) —

    Item name of out of limits item.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 148

def add_items(target_name, packet_name, item_name)
  Qt.execute_in_main_thread(true) do
    hlayout = Qt::HBoxLayout.new
    hlayout.setSpacing(0)
    hlayout.setContentsMargins(0,0,0,0)
    @scroll_layout.addLayout(hlayout)

    item = [target_name, packet_name, item_name]
    new_widget = LabelvaluelimitsbarWidget.new(hlayout, target_name, packet_name, item_name)
    new_widget.set_setting('COLORBLIND', [@colorblind])
    new_widget.process_settings

    ignore_button = Qt::PushButton.new('Ignore')
    ignore_button.connect(SIGNAL('clicked()')) do
      ignore_item(item)
    end

    hlayout.addWidget(ignore_button)

    @widget_hframes << hlayout
    @new_widgets << new_widget
    @widgets << new_widget
    @buttons << ignore_button
  end
end

#closeEvent(event) ⇒ Object

Handle the window closing.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 756

def closeEvent(event)
  @cancel_thread = true
  @value_sleeper.cancel
  @limits_sleeper.cancel
  script_disconnect()
  Cosmos.kill_thread(self, @limits_thread, 2)
  Cosmos.kill_thread(self, @value_thread, 2)
  super(event)
end

#graceful_kill ⇒ Object

Gracefully kill threads



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 767

def graceful_kill
  Qt::CoreApplication.processEvents()
end

#handle_clear_ignored_items ⇒ Object

Slot to handle when the clear ignored items menu option is selected.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 568

def handle_clear_ignored_items
  @ignored_items.clear
  @initialized = false
  statusBar.showMessage('')
end

#handle_new_items ⇒ Object

Process any new items that become out of limits.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 684

def handle_new_items
  @new_widgets = []

  Qt.execute_in_main_thread(true) do
    @new_items.each do |target, pkt_name, item_name|
      # Create widgets for new items
      add_items(target, pkt_name, item_name)
    end
  end

  # Set initial values

  Qt.execute_in_main_thread(true) do
    begin
      values, limits_states, limits_settings, limits_set = get_tlm_values(@new_items, :WITH_UNITS)
      index = 0
      @new_items.each do |target_name, packet_name, item_name|
        begin
          System.limits.set(target_name, packet_name, item_name, limits_settings[index][0], limits_settings[index][1], limits_settings[index][2], limits_settings[index][3], limits_settings[index][4], limits_settings[index][5], limits_set) if limits_settings[index]
        rescue
          # This can fail if we missed setting the DEFAULT limits set earlier - Oh well
        end
        index += 1
      end
      index = 0

      @new_widgets.each do |widget|
        limits_state = limits_states[index]
        widget.limits_set = limits_set
        widget.limits_state = limits_state
        widget.value = values[index]
        index += 1
        modify_overall_limits_state(limits_state)
      end

      update_overall_limits_state()

      @new_items.each do |item|
        @items << item
      end
      @new_items = []
    rescue DRb::DRbConnError
      statusBar.showMessage('Error Connecting to Command and Telemetry Server - Reseting')
      @initialized = false
    end
  end
end

#handle_open_ignored_items ⇒ Object

Slot to handle when the load ignored items menu option is selected.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 626

def handle_open_ignored_items
  if @ignored_filename
    filename = Qt::FileDialog::getOpenFileName(self, "Open Configuration File", @ignored_filename)
  else
    filename = Qt::FileDialog::getOpenFileName(self, "Open Configuration File", File.join(::Cosmos::USERPATH, 'config', 'tools', 'limits_monitor', 'limits_monitor.txt'))
  end
  unless filename.nil? or filename.empty?
    process_config(filename)
  end
end

#handle_reset ⇒ Object

Reset front panel and log when the reset menu option is selected.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 733

def handle_reset
  Qt.execute_in_main_thread(true) do
    @widgets.each {|widget| widget.dispose}
    @buttons.each {|button| button.dispose}
    @widget_hframes.each do |hframe|
      @scroll_layout.removeItem(hframe)
      hframe.dispose
    end
    @scroll.repaint

    @widgets = []
    @new_widgets = []
    @buttons = []
    @widget_hframes = []
    @items = []
    @value_limits_set = :DEFAULT

    @overall_limits_state = :STALE
    update_overall_limits_state()
  end
end

#handle_save_ignored_items ⇒ Object

Slot to handle when the save ignored items menu option is selected.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 605

def handle_save_ignored_items
  if @ignored_filename
    filename = Qt::FileDialog.getSaveFileName(self, 'Save As...', @ignored_filename, 'Configuration Files (*.txt)')
  else
    filename = Qt::FileDialog.getSaveFileName(self, 'Save As...', File.join(::Cosmos::USERPATH, 'config', 'tools', 'limits_monitor', 'limits_monitor.txt'), 'Configuration Files (*.txt)')
  end
  unless filename.nil? or filename.empty?
    begin
      File.open(filename, "w") do |file|
        @ignored_items.each do |target, pkt_name, item_name|
          file.puts("IGNORE #{target} #{pkt_name} #{item_name}")
        end
      end
      statusBar.showMessage("#{filename} saved")
    rescue => e
      statusBar.showMessage("Error Saving Configuration : #{e.message}")
    end
  end
end

#handle_view_ignored_items ⇒ Object

Slot to handle when the view ignored items menu option is selected.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 575

def handle_view_ignored_items
  # Turn Command into scripting text string
  string = ''
  @ignored_items.each do |item|
    string << "#{item[0]} #{item[1]} #{item[2]}\n"
  end

  # Show Dialog box with text displaying ignored items
  Qt::Dialog.new(self) do |dialog|
    dialog.setWindowTitle('Ignored Telemetry Items')
    text = Qt::PlainTextEdit.new
    text.setReadOnly(true)
    text.setPlainText(string) if string

    ok = Qt::PushButton.new('Ok') do
      connect(SIGNAL('clicked()')) { dialog.done(0) }
    end

    dialog.layout = Qt::VBoxLayout.new do
      addWidget(text)
      addWidget(ok)
    end

    dialog.resize(500, 200)
    dialog.exec
    dialog.dispose
  end
end

#ignore_item(item) ⇒ Object

Update front panel to ignore an item when the corresponding button is pressed.

Parameters:

  • item (Array) —

    Array containing the target, packet, and item name of the item to ignore.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 662

def ignore_item(item)
  Qt.execute_in_main_thread(true) do
    @ignored_items << item
    delete_index = @items.delete_item(item)
    if delete_index
      hframe_to_dispose = @widget_hframes[delete_index]
      widget_to_dispose = @widgets[delete_index]
      button_to_dispose = @buttons[delete_index]
      @widgets.delete_at(delete_index)
      @buttons.delete_at(delete_index)
      @widget_hframes.delete_at(delete_index)
      @scroll_layout.removeItem(hframe_to_dispose)
      widget_to_dispose.dispose
      button_to_dispose.dispose
      hframe_to_dispose.dispose
      @scroll.repaint
    end
    statusBar.showMessage('Warning: Some Telemetry Items are Ignored')
  end
end

#initialize_menus ⇒ Object

Sets up the menu bar with selectable options and the signal/slot combinations for when those options are selected.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 204

def initialize_menus
  # File Menu
  @file_menu = menuBar.addMenu(tr('&File'))

  @options_action = Qt::Action.new(tr('O&ptions'), self)
  @options_action.statusTip = tr('Open the options dialog')
  connect(@options_action, SIGNAL('triggered()'), self, SLOT('options()'))

  @reset_action = Qt::Action.new(tr('&Reset'), self)
  @reset_action_keyseq = Qt::KeySequence.new(tr('Ctrl+R'))
  @reset_action.shortcut = @reset_action_keyseq
  @reset_action.statusTip = tr('Reset connection and clear all items. This does not modify the ignored items.')
  connect(@reset_action, SIGNAL('triggered()'), self, SLOT('reset()'))

  @open_ignored_action = Qt::Action.new(Cosmos.get_icon('open.png'),
                                        tr('&Open Config'), self)
  @open_ignored_action_keyseq = Qt::KeySequence.new(tr('Ctrl+O'))
  @open_ignored_action.shortcut = @open_ignored_action_keyseq
  @open_ignored_action.statusTip = tr('Open ignored telemetry items configuration file')
  connect(@open_ignored_action, SIGNAL('triggered()'), self, SLOT('handle_open_ignored_items()'))

  @save_ignored_action = Qt::Action.new(Cosmos.get_icon('save.png'),
                                        tr('&Save Config'), self)
  @save_ignored_action_keyseq = Qt::KeySequence.new(tr('Ctrl+S'))
  @save_ignored_action.shortcut = @save_ignored_action_keyseq
  @save_ignored_action.statusTip = tr('Save all ignored telemetry items in a configuration file')
  connect(@save_ignored_action, SIGNAL('triggered()'), self, SLOT('handle_save_ignored_items()'))

  @clear_ignored_action = Qt::Action.new(tr('&Clear Ignored'), self)
  @clear_ignored_action.statusTip = tr('Clear all ignored telemetry items so they become monitored')
  connect(@clear_ignored_action, SIGNAL('triggered()'), self, SLOT('handle_clear_ignored_items()'))

  @view_ignored_action = Qt::Action.new(tr('&View Ignored'), self)
  @view_ignored_action.statusTip = tr('View the ignored telemetry items list')
  connect(@view_ignored_action, SIGNAL('triggered()'), self, SLOT('handle_view_ignored_items()'))

  @file_menu.addAction(@open_ignored_action)
  @file_menu.addAction(@save_ignored_action)
  @file_menu.addAction(@clear_ignored_action)
  @file_menu.addAction(@view_ignored_action)
  @file_menu.addSeparator()
  @file_menu.addAction(@reset_action)
  @file_menu.addAction(@options_action)
  @file_menu.addSeparator()
  @file_menu.addAction(@exit_action)

  # Help Menu
  @about_string = "Limits Monitor displays all telemetry items that are or have been out of limits since it was started or reset."

  initialize_help_menu()
end

#limits_thread ⇒ Object

Sets up the thread to monitor for broken limits and add them to the log and front panel when found.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 307

def limits_thread
  @limits_thread = Thread.new do
    begin
      while true
        break if @cancel_thread
        begin
          initialized = nil
          break if @cancel_thread
          Qt.execute_in_main_thread(true) do
            initialized = @initialized
          end
          unless initialized
            @limits_set = nil
            break if @cancel_thread
            Qt.execute_in_main_thread(true) do
              @out_of_limits_items = []
            end
            unsubscribe_limits_events(@queue_id) if @queue_id
            @queue_id = nil

            handle_reset()

            # Get the current limits set
            @limits_set = get_limits_set()

            # Subscribe to limits notifications
            @queue_id = subscribe_limits_events(100000)

            # Get initial list of out of limits items
            items = get_out_of_limits()
            unless items.empty?
              break if @cancel_thread
              Qt.execute_in_main_thread(true) do
                items.each do |item|
                  unless @ignored_items.includes_item?(item) and !@items.includes_item?(item)
                    @new_items << [item[0], item[1], item[2]]
                    @out_of_limits_items << [item[0], item[1], item[2]]
                  end
                end
                handle_new_items()
              end
            end

            break if @cancel_thread
            Qt.execute_in_main_thread(true) do
              @initialized = true
              if @ignored_items.empty?
                statusBar.showMessage(tr(""))
              else
                statusBar.showMessage('Warning: Some Telemetry Items are Ignored')
              end
            end

          end

          begin
            break if @cancel_thread
            type, data = get_limits_event(@queue_id, true)
            break if @cancel_thread
          rescue ThreadError
            break if @cancel_thread
            break if @limits_sleeper.sleep(1)
            next
          end

          break if @cancel_thread

          case type
          when :LIMITS_CHANGE
            item = [data[0], data[1], data[2]]
            if data[4] != :GREEN and data[4] != :GREEN_HIGH and data[4] != :GREEN_LOW and data[4] != :BLUE and data[4] != nil
              case data[4]
              when :YELLOW, :YELLOW_HIGH, :YELLOW_LOW
                to_print = Time.now.formatted << '  ' << "WARN: #{data[0]} #{data[1]} #{data[2]} = #{tlm(data[0], data[1], data[2])} is #{data[4]}\n"
                update_log(to_print, 1)
              when :RED, :RED_HIGH, :RED_LOW
                to_print = Time.now.formatted << '  ' << "ERROR: #{data[0]} #{data[1]} #{data[2]} = #{tlm(data[0], data[1], data[2])} is #{data[4]}\n"
                update_log(to_print, 2)
              end

              # Limits changed to non-green
              unless @out_of_limits_items.includes_item?(item) or @ignored_items.includes_item?(item)
                @out_of_limits_items << item
                @new_items << item
                handle_new_items()
              end
            elsif data[4] == :GREEN or data[4] == :GREEN_HIGH or data[4] == :GREEN_LOW or data[4] == :BLUE
              to_print = Time.now.formatted << '  ' << "INFO: #{data[0]} #{data[1]} #{data[2]} = #{tlm(data[0], data[1], data[2])} returned to GREEN\n"

              if data[4] == :BLUE
                update_log(to_print, 3)
              else
                update_log(to_print, 0)
              end
            end

          when :LIMITS_SET
            if @limits_set != data
              break if @cancel_thread
              Qt.execute_in_main_thread(true) do
                statusBar.showMessage('Limits Set Changed - Reseting')
                @initialized = false
                to_print = Time.now.formatted << '  ' << "INFO: Limits Set Changed to: #{data}\n"
                update_log(to_print, 4)
              end
              break if @cancel_thread
            end

          when :LIMITS_SETTINGS
            begin
              System.limits.set(data[0], data[1], data[2], data[6], data[7], data[8], data[9], data[10], data[11], data[3], data[4], data[5])
              break if @cancel_thread
              Qt.execute_in_main_thread(true) do
                statusBar.showMessage('Limits Settings Changed - Reseting')
                @initialized = false
                to_print = Time.now.formatted << '  ' << "INFO: Limits Settings Changed: #{data}\n"
                update_log(to_print, 4)
              end
              break if @cancel_thread
            rescue
              # This can fail if we missed setting the DEFAULT limits set earlier - Oh well
            end
          end

        rescue DRb::DRbConnError
          break if @cancel_thread
          @queue_id = nil
          break if @cancel_thread
          Qt.execute_in_main_thread(true) do
            statusBar.showMessage('Error Connecting to Command and Telemetry Server - Reseting')
            @initialized = false
          end
          break if @cancel_thread
          break if @limits_sleeper.sleep(1)
        end
      end # loop
    rescue Exception => error
      Cosmos.handle_fatal_exception(error)
    end
  end
end

#modify_overall_limits_state(limits_state) ⇒ Object

Checks for the current worst limits state.

Parameters:

  • limits_state (Symbol) —

    State of the current limit being checked.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 519

def modify_overall_limits_state(limits_state)
  case @overall_limits_state
  when :STALE
    @overall_limits_state = limits_state
  when :BLUE
    if limits_state != nil and limits_state != :STALE
      @overall_limits_state = limits_state
    end
  when :GREEN, :GREEN_HIGH, :GREEN_LOW
    if limits_state != nil and limits_state != :STALE and limits_state != :BLUE
      @overall_limits_state = limits_state
    end
  when :YELLOW, :YELLOW_HIGH, :YELLOW_LOW
    if limits_state == :RED or limits_state == :RED_HIGH or limits_state == :RED_LOW
      @overall_limits_state = limits_state
    end
  end
end

#options ⇒ Object

Slot to handle the options menu item when selected.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 257

def options
  Qt::Dialog.new(self) do |dialog|
    dialog.setWindowTitle('Options')

    colorblind_box = Qt::CheckBox.new('Colorblind Mode Enabled', self)
    if (@colorblind)
      colorblind_box.setCheckState(Qt::Checked)
    end

    ok = Qt::PushButton.new('Ok') do
      connect(SIGNAL('clicked()')) { dialog.accept }
    end

    cancel = Qt::PushButton.new('Cancel') do
      connect(SIGNAL('clicked()')) { dialog.reject }
    end

    buttons = Qt::HBoxLayout.new do
      addWidget(ok)
      addWidget(cancel)
    end

    dialog.layout = Qt::VBoxLayout.new do
      addWidget(colorblind_box)
      addLayout(buttons)
    end

    case dialog.exec
    when Qt::Dialog::Accepted
      if (colorblind_box.checkState() == Qt::Checked)
        @colorblind = true
      else
        @colorblind = false
      end
      @widgets.each do |widget|
        widget.set_setting('COLORBLIND', [@colorblind])
        widget.process_settings
      end
    end
    dialog.dispose
  end
end

#process_config(filename) ⇒ Object

Handle config file if present.

Parameters:

  • filename (String) —

    Filename for the config file if present.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 640

def process_config(filename)
  @initialized = false
  @ignored_items = []

  begin
    parser = ConfigParser.new
    parser.parse_file(filename) do |keyword, params|
      case keyword
      when 'IGNORE'
        ignore_item([params[0], params[1], params[2]])
      end
    end
    statusBar.showMessage("#{filename} loaded")
  rescue => e
    statusBar.showMessage("Error Loading Configuration : #{e.message}")
  end
end

#reset ⇒ Object

Slot to handle the resent menu item when selected.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 301

def reset
  @initialized = false
end

#update_log(to_add, color) ⇒ Object

Slot to update the log panel with limits change information.

Parameters:

  • to_add (String) —

    Text string with information about which item is out of limits, what its value is, and what limit was broken (red_low, yellow_low, etc.)

  • color (int) —

    Integer representing color of text to add.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 179

def update_log(to_add, color)
  return if @cancel_thread
  Qt.execute_in_main_thread(true) do
    @tf = Qt::TextCharFormat.new
    case color
    when 0
      brush = Cosmos.getBrush(Cosmos::GREEN)
    when 1
      brush = Cosmos.getBrush(Cosmos::YELLOW)
    when 2
      brush = Cosmos.getBrush(Cosmos::RED)
    when 3
      brush = Cosmos.getBrush(Cosmos::BLUE)
    else
      brush = Cosmos.getBrush(Cosmos::BLACK)
    end
    @tf.setForeground(brush)
    @log_output.setCurrentCharFormat(@tf)
    @log_output.appendPlainText(to_add.chomp)
    @tf.dispose
  end
end

#update_overall_limits_state ⇒ Object

Changes the limits state on the status bar at the top of the screen.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 539

def update_overall_limits_state
  text = ''
  case @overall_limits_state
  when :STALE
    palette = Cosmos.getPalette(Cosmos.getColor(0, 0, 0), Cosmos.getColor(255,0,255))
    @monitored_state_text_field.setPalette(palette)
    text = 'Stale'
  when :GREEN, :GREEN_HIGH, :GREEN_LOW
    palette = Cosmos.getPalette(Cosmos.getColor(0, 0, 0), Cosmos.getColor(0,255,0))
    @monitored_state_text_field.setPalette(palette)
    text = 'Green'
  when :YELLOW, :YELLOW_HIGH, :YELLOW_LOW
    palette = Cosmos.getPalette(Cosmos.getColor(0, 0, 0), Cosmos.getColor(255,255,0))
    @monitored_state_text_field.setPalette(palette)
    text = 'Yellow'
  when :RED, :RED_HIGH, :RED_LOW
    palette = Cosmos.getPalette(Cosmos.getColor(0, 0, 0), Cosmos.getColor(255,0,0))
    @monitored_state_text_field.setPalette(palette)
    text = 'Red'
  when :BLUE
    palette = Cosmos.getPalette(Cosmos.getColor(0, 0, 0), Cosmos.getColor(0,0,255))
    @monitored_state_text_field.setPalette(palette)
    text = 'Blue'
  end
  text << ' - Some Items Ignored' unless @ignored_items.empty?
  @monitored_state_text_field.text = text
end

#value_thread ⇒ Object

Sets up the thread to monitor the limits values and update them when they change, as well as updating the status bar at the top of the front panel.



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# File 'lib/cosmos/tools/limits_monitor/limits_monitor.rb', line 451

def value_thread
  @value_thread = Thread.new do
    begin
      while true
        break if @cancel_thread
        unless @items.empty?
          Qt.execute_in_main_thread(true) do
            begin
              # Gather items for  widgets
              values, limits_states, limits_settings, limits_set = get_tlm_values(@items, :WITH_UNITS)
              index = 0
              @items.each do |target_name, packet_name, item_name|
                begin
                  System.limits.set(target_name, packet_name, item_name, limits_settings[index][0], limits_settings[index][1], limits_settings[index][2], limits_settings[index][3], limits_settings[index][4], limits_settings[index][5], limits_set) if limits_settings[index]
                rescue
                  # This can fail if we missed setting the DEFAULT limits set earlier - Oh well
                end
                index += 1
              end

              # Handle change in limits set
              if limits_set != @value_limits_set
                @value_limits_set = limits_set
                @widgets.each do |widget|
                  widget.limits_set = @value_limits_set
                end
              end

              # Update widgets with values and limits_states
              @overall_limits_state = :STALE
              (0..(values.length - 1)).each do |widget_index|
                limits_state = limits_states[widget_index]
                @widgets[widget_index].limits_state = limits_state
                @widgets[widget_index].value = values[widget_index]
              end

              # Update overall limits state
              modify_overall_limits_state(get_overall_limits_state(@ignored_items))
              update_overall_limits_state()
            rescue DRb::DRbConnError
              # Do nothing
            end
          end
        else
          @overall_limits_state = :STALE
          break if @cancel_thread
          Qt.execute_in_main_thread(true) do
            begin
              modify_overall_limits_state(get_overall_limits_state(@ignored_items))
            rescue DRb::DRbConnError
              # Do nothing
            end
            update_overall_limits_state()
          end
        end

        # Sleep until next polling period
        break if @value_sleeper.sleep(1)
      end
    rescue Exception => error
      Cosmos.handle_fatal_exception(error)
    end
  end
end