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