Class: Cosmos::Launcher

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

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from QtTool

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

Constructor Details

#initialize(options) ⇒ Launcher

Returns a new instance of Launcher.



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# File 'lib/cosmos/tools/launcher/launcher.rb', line 24

def initialize(options)
  super(options) # MUST BE FIRST - All code before super is executed twice in RubyQt Based classes

  # Set environment variable of COSMOS_USERPATH so that all launched apps know where to find the configuration
  ENV['COSMOS_USERPATH'] = Cosmos::USERPATH

  Cosmos.load_cosmos_icon("launcher.png")
  layout.setSizeConstraint(Qt::Layout::SetFixedSize)

  @about_string = "Launcher provides a list of applications to launch at the click of a button. It can also launch multiple applications and configure their exact placement on the screen."
  initialize_actions()
  initialize_menus()
  initialize_central_widget()
  complete_initialize()
end

Class Method Details

.pre_window_new_hook(options) ⇒ Object 



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# File 'lib/cosmos/tools/launcher/launcher.rb', line 165

def self.pre_window_new_hook(options)
  # Show legal dialog
  LegalDialog.new
end

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



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# File 'lib/cosmos/tools/launcher/launcher.rb', line 170

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.title = 'Launcher'
      options.config_file = 'launcher.txt'
      option_parser.separator "Launcher 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

#initialize_central_widget ⇒ Object 



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# File 'lib/cosmos/tools/launcher/launcher.rb', line 49

def initialize_central_widget
  # Create the central widget
  central_widget = Qt::Widget.new
  setCentralWidget(central_widget)

  # Read the configuration file
  config_file = File.join(Cosmos::USERPATH, 'config', 'tools', 'launcher', @options.config_file)
  begin
    config = LauncherConfig.new(config_file)
  rescue => error
    ExceptionDialog.new(self, error, "Error parsing #{config_file}")
  end

  # Set the title
  self.window_title = config.title

  # Create each button or divider
  default_icon_filename = 'COSMOS_64x64.png'
  widgets = []
  config.items.each do |item_type, text, shell_command_or_settings, capture_io, icon_filename, variable_parameters|
    case item_type
    when :TOOL, :MULTITOOL
      layout = Qt::VBoxLayout.new
      if icon_filename
        icon = Cosmos.get_icon(icon_filename)
      else
        icon = Cosmos.get_icon(default_icon_filename)
      end
      button = Qt::PushButton.new('')
      button.setIcon(icon)
      button.setIconSize(Qt::Size.new(64,64))
      if item_type == :TOOL
        connect(button,
                SIGNAL('clicked()'),
                LauncherTool.new(self, text, shell_command_or_settings, capture_io, variable_parameters),
                SLOT('button_clicked()'))
      else
        connect(button,
                SIGNAL('clicked()'),
                LauncherMultitool.new(self, shell_command_or_settings),
                SLOT('button_clicked()'))
      end
      if Kernel.is_mac?
        button.setFixedSize(84,84)
      else
        stylesheet = "padding:4px; text-align:center; " \
          "font-family:#{config.tool_font_settings[0]}; " \
          "font-size:#{config.tool_font_settings[1]}px"
        button.setStyleSheet(stylesheet)
        button.setFixedSize(74,74)
      end
      label = Qt::Label.new(text)
      stylesheet = "text-align:center; " \
        "font-family:#{config.tool_font_settings[0]}; " \
        "font-size:#{config.tool_font_settings[1]}px"
      label.setStyleSheet(stylesheet)
      label.wordWrap = true
      label.setFixedWidth(70)
      label.setSizePolicy(Qt::SizePolicy::Fixed, Qt::SizePolicy::Fixed)
      label.setMinimumSize(label.sizeHint)
      label.setAlignment(Qt::AlignHCenter)
      layout.addWidget(button)
      layout.addWidget(label)
      layout.setAlignment(button, Qt::AlignHCenter)
      layout.setAlignment(label, Qt::AlignHCenter)
      widgets << layout

    when :DIVIDER
      divider = Qt::Frame.new
      divider.setFrameStyle(Qt::Frame::HLine | Qt::Frame::Raised)
      divider.setLineWidth(1)
      divider.setMidLineWidth(1)
      widgets << divider

    when :LABEL
      label = Qt::Label.new(text)
      stylesheet = "text-align:center; " \
        "font-family:#{config.label_font_settings[0]}; " \
        "font-size:#{config.label_font_settings[1]}px"
      label.setStyleSheet(stylesheet)
      widgets << label

    else
      raise "Unhandled item type from LauncherConfig: #{item_type}"
    end
  end

  # Add widgets to layout
  col = 0
  h_layout = nil
  v_layout = Qt::VBoxLayout.new
  central_widget.layout = v_layout
  widgets.each do |widget|
    if Qt::VBoxLayout === widget
      unless h_layout
        h_layout = Qt::HBoxLayout.new
        v_layout.addLayout(h_layout)
        col = 0
      end
      widget.setAlignment(Qt::AlignTop | Qt::AlignLeft)
      h_layout.addLayout(widget)
      col += 1
      if col >= config.num_columns
        col = 0
        h_layout = nil
      end
    else
      # Divider or Label
      h_layout.addStretch(0) if h_layout
      v_layout.addWidget(widget)
      h_layout = nil
    end
  end
  h_layout.addStretch(0) if h_layout
end

#initialize_menus ⇒ Object 



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# File 'lib/cosmos/tools/launcher/launcher.rb', line 40

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

  # Help Menu
  initialize_help_menu()
end