Class: HowtoDialog

Inherits:
Object
  • Object
show all
Includes:
BasicLogging, Translating
Defined in:
lib/gui/HowtoDialog.rb

Constant Summary collapse

PDFViers = 
%w"firefox opera epiphany-browser"
@@GD = 
File::expand_path(File::dirname(__FILE__) ) + File::Separator
@@HOWTO = 
$PROG_DIR.dup << '../doc/gui_howto.pdf'

Constants included from BasicLogging

BasicLogging::DEBUG, BasicLogging::ERROR, BasicLogging::FATAL, BasicLogging::INFO, BasicLogging::Levels, BasicLogging::UNKNOWN, BasicLogging::WARN

Instance Attribute Summary

Attributes included from BasicLogging

#log_level, #target

Instance Method Summary collapse

Methods included from BasicLogging

is_muted?, #log, mute, #set_level, #set_target

Methods included from Translating

language, trl, #trl

Constructor Details

#initialize(options = {}) ⇒ HowtoDialog

Returns a new instance of HowtoDialog.



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# File 'lib/gui/HowtoDialog.rb', line 37

def initialize(options = {})
	@hdialog = Gtk::Dialog.new()
	reader_frame = Gtk::Frame.new(trl('Howto'))

	reader_vbox = Gtk::Box.new(:vertical, 5)
	reader_vbox.border_width = 5
	reader_hbox = Gtk::Box.new(:horizontal, 5)
	reader_hbox.border_width = 5

	bl_text = trl("Please name the command which starts your PDF viewer (e.g. qpdfview, acroread, evince, display ...).")
	reader_label = Gtk::Label.new(bl_text)
	reader_label.wrap = true
	@reader_entry = Gtk::Entry.new                                 
	@reader_entry.width_chars = 33
	@reader_entry.height_request = 25
	# Sabotage fix. “We, the Gods of GTK approve of this failure”
	# @reader_entry.text = $CONF.pdf_reader
	@reader_entry.text = find_reader()
	@bc_button = Gtk::Button.new()
	@bc_button.add(ButtonLabel.new(trl('_Choose'), "%s/gtk-open.xpm" %@@GD))

	reader_vbox.pack_start(reader_label, :expand => false)

	reader_hbox.pack_start(@reader_entry, :expand => false)
	reader_hbox.pack_start(@bc_button, :expand => false)
	reader_vbox.pack_start(reader_hbox, :expand => false)
	reader_frame.add(reader_vbox)

	button_box = Gtk::ButtonBox.new(:horizontal)
	button_box.layout_style = :start
	@cancel_button = Gtk::Button.new()
	@cancel_button.add(ButtonLabel.new(trl('_Cancel'), "%s/gtk-stop.xpm" %@@GD))
	@ok_button = Gtk::Button.new()
	@ok_button.add(ButtonLabel.new(trl('_Accept'), "%s/gtk-execute.xpm" %@@GD))

	button_box.pack_start(@ok_button, :expand => false)
	button_box.pack_start(@cancel_button, :expand => false)

	@hdialog.child.pack_start(reader_frame)
	@hdialog.child.pack_start(button_box)

	@bc_button.set_tooltip_text trl('Choose a PDF viewer')
	@reader_entry.set_tooltip_text trl('Command, which starts your PDF viewer')
	@cancel_button.set_tooltip_text trl('Close dialog')
	@ok_button.set_tooltip_text trl('Executes your PDF-viewer and shows the Howto manual')

	connect_buttons
	@hdialog.set_title('HOWTO: ' << CremeFraiche::prog_info[:app_name])
	@hdialog.child.show_all
	@hdialog.signal_connect('response') do |dlg, resp|
		debug("response %i emitted" %resp) 
		@adialog.destroy if(:cancel == resp) 
	end  
	if(options && options.keys.include?(:on_destroy))
		@hdialog.signal_connect('destroy') {options[:on_destroy].call() }
	end

	@hdialog.show
end

Instance Method Details

#choose_reader ⇒ Object 



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# File 'lib/gui/HowtoDialog.rb', line 101

def choose_reader
	dialog = Gtk::FileChooserDialog.new(:title => trl("set reader"),
					    :parent => nil,
					    :action => :open,
					    :buttons => [[:cancel, :cancel], [:accept, :accept]])

	if(@reader_entry.text && ! @reader_entry.text.empty?)
		debug('reader is ' << @reader_entry.text)
		dialog.filename = @reader_entry.text 
	end
	ret = dialog.run
	br = (ret == Gtk::ResponseType::ACCEPT ? dialog.filename : nil)
	dialog.destroy

	msg = File_Checking.file_check(br, [:exist?, :file?, :executable?]) if br   
	if(msg)
		error(msg) 
		msg_dialog(msg, DLG_ERROR) 
		br = nil
	end
	return br
end

#connect_buttons ⇒ Object 



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# File 'lib/gui/HowtoDialog.rb', line 124

def connect_buttons
	@bc_button.signal_connect("clicked") do 
		br = choose_reader
		@reader_entry.text = br if br
	end

	@cancel_button.signal_connect("clicked") do
		@hdialog.destroy
	end
	@ok_button.signal_connect("clicked") do
		run_reader(@reader_entry.text) if @reader_entry.text
	end
end

#find_reader ⇒ Object 



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# File 'lib/gui/HowtoDialog.rb', line 97

def find_reader
	PDFViers.detect(''){|c| $Progs.include?(c)}
end

#msg_dialog(msg, type) ⇒ Object 



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# File 'lib/gui/HowtoDialog.rb', line 163

def msg_dialog(msg, type)
	dialog = Gtk::MessageDialog.new(
					:parent => nil, 
					:flags => :destroy_with_parent,
					:type => type,
					:message => "%s: \"%s\"" %[Translating::trl(type.to_s.upcase), msg])

	dialog.set_title(DLG_INFO == type ? 'Info' : 'Error' )
	dialog.run
	dialog.destroy
	return msg
end

#run_reader(br) ⇒ Object 



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# File 'lib/gui/HowtoDialog.rb', line 138

def run_reader(br)
	msg = nil
	if(br && ! br.empty?)
		begin
			fork_sym = (RUBY_PLATFORM =~ /win/) ? '' : ' &'
			exec_command = "%s %s%s" %[br, @@HOWTO, fork_sym]
			debug "exec-command will be %s" %exec_command 
			hr = system exec_command
			if(!hr)
				msg = trl("Cannot open the PDF viewer!", "\n") 
				msg += trl("Please verify, that %s is correctly spelled or use another reader.", "\"#{br}\"") 
			else
				@hdialog.destroy
			end
		rescue Exception => ex
			msg = trl("Cannot open the PDF viewer %s", ex)
		end
	else
		msg = trl('No reader selected, skipping Howto.')
	end
	error(msg) if msg
	debug($?.to_s) if @log
	msg_dialog(msg, DLG_ERROR) if msg
end