deluge/plugins/NetworkGraph/plugin.py

# netgraph plugin

class plugin_NetGraph:
	def __init__(self, path, deluge_core, deluge_interface):
		import gtk
		self.parent   = deluge_interface
		self.location = path
		self.core = deluge_core

		self.image  = gtk.Image()

		self.viewPort = gtk.Viewport()
		self.viewPort.add(self.image)

		self.scrolledWindow = gtk.ScrolledWindow()
		self.scrolledWindow.add(self.viewPort)
		self.scrolledWindow.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)

		self.topWidget = self.scrolledWindow

		self.parentNotebook = self.parent.notebook
#		print "Parent NOTEBOOK:", self.parentNotebook
		self.parentNotebook.append_page(self.topWidget, gtk.Label("Graph"))
#		print "My INDEX in parentNoteBook:", self.index

		self.image.show()
		self.viewPort.show()
		self.scrolledWindow.show()

		self.length = 60

		self.width  = -1
		self.height = -1

		import pango

		self.pangoContext = self.parent.window.get_pango_context()
		self.pangoLayout = pango.Layout(self.pangoContext)

		self.savedUpSpeeds   = []
		self.savedDownSpeeds = []

		self.bootupRuns = 3  # This ensures that we pass the resizing phase, with scrollbars, etc.
									# So the first time it is viewed, we are all ready

	def unload(self): # Shutdown is called when the plugin is deactivated
		numPages = self.parentNotebook.get_n_pages()
		for page in range(numPages):
			if self.parentNotebook.get_nth_page(page) == self.topWidget:
				self.parentNotebook.remove_page(page)
				break

	def update(self):
		import gtk
		session_info = self.core.get_state()
		self.savedUpSpeeds.insert(0, session_info['upload_rate'])
		if len(self.savedUpSpeeds) > self.length:
			self.savedUpSpeeds.pop()
		self.savedDownSpeeds.insert(0, session_info['download_rate'])
		if len(self.savedDownSpeeds) > self.length:
			self.savedDownSpeeds.pop()

		if not self.parentNotebook.get_nth_page(self.parentNotebook.get_current_page()) == \
				 self.topWidget and not self.bootupRuns > 0:
			return

		self.bootupRuns = max(self.bootupRuns - 1, 0)

		extraWidth  = self.scrolledWindow.get_vscrollbar().get_allocation().width  * 1.5
		extraHeight = self.scrolledWindow.get_hscrollbar().get_allocation().height * 1.5
		allocation = self.scrolledWindow.get_allocation()
		allocation.width  = int(allocation.width)  - extraWidth
		allocation.height = int(allocation.height) - extraHeight

		# Don't try to allocate a size too small, or you might crash
		if allocation.width < 2 or allocation.height < 2:
			return

#		savedDownSpeeds = [1,2,3,2,1]
#		savedUpSpeeds = [5,8,0,0,1,2]

#		allocation = self.image.get_allocation()
#		allocation.width  = 300
#		allocation.height = 200

		if not allocation.width == self.width or not allocation.height == self.height:
#			print "New Pixmap!"
			self.width  = allocation.width
			self.height = allocation.height

			self.networkPixmap = gtk.gdk.Pixmap(None, self.width, self.height, 24)
			self.image.set_from_pixmap(self.networkPixmap, None)
			self.ctx = self.networkPixmap.cairo_create()

		self.networkPixmap.draw_rectangle(self.image.get_style().white_gc,True, 0, 0, self.width, self.height)

		maxSpeed = max(max(self.savedDownSpeeds),max(self.savedUpSpeeds))

		if maxSpeed == 0:
			return

		maxSpeed = maxSpeed*1.1 # Give some extra room on top

		self.drawSpeedPoly(self.savedDownSpeeds, (0.5,1,   0.5, 1.0),    maxSpeed, True)
		self.drawSpeedPoly(self.savedDownSpeeds, (0,  0.75,0,   1.0),    maxSpeed, False)

		self.drawSpeedPoly(self.savedUpSpeeds,   (0.33,0.33,1.0,  0.5),  maxSpeed, True)
		self.drawSpeedPoly(self.savedUpSpeeds,   (0,   0,   1.0,  0.75), maxSpeed, False)

		meanUpSpeed   = sum(self.savedUpSpeeds)  /len(self.savedUpSpeeds)
		meanDownSpeed = sum(self.savedDownSpeeds)/len(self.savedDownSpeeds)
		shownSpeed    = max(meanUpSpeed, meanDownSpeed)
		
		import common

		self.pangoLayout.set_text(common.frate(shownSpeed))
		self.networkPixmap.draw_layout(self.image.get_style().black_gc,
												 4,
												 int(self.height - 1 - (self.height*shownSpeed/maxSpeed)),
												 self.pangoLayout)

		self.networkPixmap.draw_line(self.image.get_style().black_gc,
											  0,			  int(self.height - (self.height*shownSpeed/maxSpeed)),
											  self.width, int(self.height - (self.height*shownSpeed/maxSpeed)))

		self.networkPixmap.draw_rectangle(self.image.get_style().black_gc,False, 0, 0, self.width-1, self.height-1)

		self.image.queue_draw()

	def tracePath(self, speeds, maxSpeed):
		lineWidth = 4

		self.ctx.set_line_width(lineWidth)

		self.ctx.move_to(self.width + lineWidth,self.height + lineWidth)
		self.ctx.line_to(self.width + lineWidth,int(self.height-(self.height*speeds[0]/maxSpeed)))

		for i in range(len(speeds)):
			self.ctx.line_to(int(self.width-1-((i*self.width)/(self.length-1))),
									int(self.height-1-(self.height*speeds[i]/maxSpeed)))

		self.ctx.line_to(int(self.width-1-(((len(speeds)-1)*self.width)/(self.length-1))),
								int(self.height)-1 + lineWidth)

		self.ctx.close_path()

	def drawSpeedPoly(self, speeds, color, maxSpeed, fill):

		self.tracePath(speeds, maxSpeed)
		self.ctx.set_source_rgba(color[0],color[1],color[2], color[3])

		if fill:
			self.ctx.fill()
		else:
			self.ctx.stroke()