Class: KeepYourHead::WindowEdit::LazyUpdate

Inherits:
Object
  • Object
show all
Defined in:
lib/Keepyourhead/gui/WindowEdit.rb

Constant Summary collapse

Delay = 
0.5
Timeout = 
1000 * Delay / 3.0 * 1.1

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(view) ⇒ LazyUpdate

Returns a new instance of LazyUpdate.



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# File 'lib/Keepyourhead/gui/WindowEdit.rb', line 283

def initialize( view )
	self.running = false
	self.view = view
end

Instance Attribute Details

#running ⇒ Object

Returns the value of attribute running.



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# File 'lib/Keepyourhead/gui/WindowEdit.rb', line 278

def running
  @running
end

#selected ⇒ Object

Returns the value of attribute selected.



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# File 'lib/Keepyourhead/gui/WindowEdit.rb', line 278

def selected
  @selected
end

#state ⇒ Object

Returns the value of attribute state.



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# File 'lib/Keepyourhead/gui/WindowEdit.rb', line 278

def state
  @state
end

#view ⇒ Object

Returns the value of attribute view.



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# File 'lib/Keepyourhead/gui/WindowEdit.rb', line 278

def view
  @view
end

#when ⇒ Object

Returns the value of attribute when.



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# File 'lib/Keepyourhead/gui/WindowEdit.rb', line 278

def when
  @when
end

Instance Method Details

#restart ⇒ Object 



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# File 'lib/Keepyourhead/gui/WindowEdit.rb', line 288

def restart
	if not self.selected == view.selected then
		if view.selected.kind_of? Database::Flashcard then
			self.selected = view.selected
		else
			self.selected = nil # no more updates
		end
	end

	view.updateImages if view.selected == self.selected

	self.state = :waiting
	self.when = Time.now + Delay

	if not self.running then
		self.running = true
		Gtk.timeout_add( Timeout ) {
			if self.state == :waiting and self.when < Time.now then
				self.state = :running
			
				Thread.new {
					begin
						$cache.getCacheItem( self.selected, Database::FRONT ) if self.selected
						$cache.getCacheItem( self.selected, Database::BACK ) if self.selected
					rescue
						puts $!.backtrace, $!
					end
				}
			end

			if self.state == :running then
				ret = true
				$cache.hasCacheItem( self.selected, Database::FRONT ) {|cacheItem| ret &&= cacheItem } if self.selected
				$cache.hasCacheItem( self.selected, Database::BACK ) { |cacheItem| ret &&= cacheItem } if self.selected
				if ret then
					self.state = :done
				end
				
				view.updateImages if view.selected == self.selected
			end
			self.running = (self.state != :done)
			
			self.running
		}
	end
end