Class: Cosmos::TimegraphWidget

Inherits:
LinegraphWidget show all
Defined in:
lib/cosmos/tools/tlm_viewer/widgets/timegraph_widget.rb

Overview

TimegraphWidget class

This class creates a graph of the supplied data value versus time.

Constant Summary

Constants inherited from LineGraph

LineGraph::DOUBLE_CLICK_SECONDS, LineGraph::FRAME_OFFSET, LineGraph::GRAPH_SPACER, LineGraph::LABEL_TICK_SIZE, LineGraph::LEFT_X_LABEL_WIDTH_ADJUST

Instance Attribute Summary

Attributes included from Widget

#item, #item_name, #limits_set, #limits_state, #packet, #packet_name, #polling_period, #screen, #settings, #target_name, #value, #value_type

Attributes inherited from LineGraph

#draw_cursor_line_callback, #horizontal_lines, #left_y_max, #left_y_min, #mouse_leave_callback, #mouse_left_button_press_callback, #post_error_callback, #pre_error_callback, #right_y_max, #right_y_min, #x_max, #x_max_label, #x_min, #x_min_label

Instance Method Summary collapse

Methods inherited from LinegraphWidget

takes_value?

Methods included from Widget

#context_menu, #get_tooltip_text, included, #process_settings, #set_setting, #set_subsetting, #shutdown, #update_widget

Methods inherited from LineGraph

#add_horizontal_line, #add_line, #add_popups_for_lines, #adjust_popup_positions, attr_accessor_with_redraw, #auto_scale_x, #auto_scale_y, #auto_scale_y_axis, #build_popups_from_x_value, #build_x_grid_lines, #build_y_grid_lines, #calculate_base, #calculate_scaling_factors, #calculate_x_grid_lines, #calculate_y_grid_lines, #calculate_y_labels, #clear_horizontal_lines, #clear_lines, #convert_x_value_to_text, #convert_y_value_to_text, #determine_graph_size, #draw_cursor_line_and_popups, #draw_cursor_line_and_popups_at_x, #draw_error_icon, #draw_frame, #draw_graph_background, #draw_graph_into_back_buffer, #draw_graph_to_screen, #draw_horizontal_lines, #draw_legend, #draw_legend_text, #draw_line, #draw_lines, #draw_origin_lines, #draw_popups, #draw_title, #draw_x_axis_grid_lines, #draw_x_axis_title, #draw_x_label, #draw_y_axis_grid_lines, #draw_y_axis_title, #draw_y_label, #get_legend_position, #graph, #leaveEvent, #manual_scale_x, #manual_scale_y, #mouseMoveEvent, #mousePressEvent, #mouseReleaseEvent, #paintEvent, #remote_draw_cursor_line_at_x, #resizeEvent, #scale_graph, #scale_graph_to_value_x, #scale_left_to_right_y, #scale_value_to_graph_x, #scale_value_to_graph_y, #update_graph_size

Constructor Details

#initialize(parent_layout, target_name, packet_name, item_name, num_samples = 100, width = 300, height = 200, point_size = 5, time_item_name = 'RECEIVED_TIMESECONDS', value_type = :CONVERTED) ⇒ TimegraphWidget

Returns a new instance of TimegraphWidget.



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# File 'lib/cosmos/tools/tlm_viewer/widgets/timegraph_widget.rb', line 22

def initialize(parent_layout, target_name, packet_name, item_name, num_samples = 100, width = 300, height = 200, point_size = 5, time_item_name = 'RECEIVED_TIMESECONDS', value_type = :CONVERTED)
  super(parent_layout, target_name, packet_name, item_name, num_samples, width, height, value_type)
  @time_item_name = time_item_name.to_s
  @time = []
  @first_value = true
  @initial_time = 0
  @vs_time = true
  @items = []
  @items << [@target_name, @packet_name, @item_name]
  @items << [@target_name, @packet_name, @time_item_name]
  self.show_y_grid_lines = true
  self.unix_epoch_x_values = true
  self.point_size = Integer(point_size)
end

Instance Method Details

#value=(data) ⇒ Object

Obtains the telemetry item data and it’s corresponding time stamp from the telemetry item name set during widget creation and then adds this data to the LineGraph object.



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# File 'lib/cosmos/tools/tlm_viewer/widgets/timegraph_widget.rb', line 40

def value=(data)
  data  = nil
  t_sec = nil

  if @screen.mode == :REALTIME
    begin
      # Even though it has been provided, need to get data and timestamp here.
      # Otherwise, the time stamp may be from a different packet if packets
      # are received too fast
      tlm_items, _, _, _ = get_tlm_values(@items)
      data = tlm_items[0]
      t_sec = tlm_items[1]
      return if t_sec == 0.0 # Don't graph if we have no timestamp
    rescue DRb::DRbConnError
      # If the cts is not available, it must have just recently been lost
      # simply return without updating.
      return
    end
  else # in log mode
    # Note: in logmode value= usually isn't called with every data point so this is never
    # going to work very well.  Will work ok for logfile playback so we will
    # still support it.
    data = System.telemetry.value(@target_name, @packet_name, @item_name)
    t_sec = System.telemetry.value(@target_name, @packet_name, @time_item_name)
  end

  # Don't regraph old data
  return if @time[-1] == t_sec

  # create time array
  @time << t_sec

  # create data array and graph
  @data << data.to_f

  # truncate data if necessary
  if @data.length > @num_samples
    @data = @data[1..-1]
    @time = @time[1..-1]
  end

  self.clear_lines
  self.add_line('line', @data, @time)
  self.graph
end