def on_realize(self, widget=None):
self.realized = True
winctx = self.window.cairo_create()
if self.plotbuffer is None:
self.plotsize = (1600, 960)
self.plotbuffer = winctx.get_target().create_similar(cairo.CONTENT_COLOR_ALPHA,
self.plotsize[0], self.plotsize[1])
self.plotter = Plotter(self.plotbuffer, self.plotsize, self.datastore,
self.xAxis, self.yAxis, self.profiles)
overlaysize = self.size
self.overlaybuffer = winctx.get_target().create_similar(cairo.CONTENT_COLOR_ALPHA,
self.size[0], self.size[1])
self.overlayplotter = OverlayPlotter(self.overlaybuffer, overlaysize, self.xAxis, self.yAxis)
self.overlayplotter.draw()
class PlotWidget(gtk.DrawingArea):
def __init__(self, datastore, profiles, xAxis=None, yAxis=None):
gtk.DrawingArea.__init__(self)
self.backgroundcolor = (0.4, 0.15, 0.3, 1)
self.datastore = datastore
self.profiles = profiles
self.x_wrap = False
self.realized = False
self.connect("expose-event", self.on_expose_event)
self.connect("configure-event", self.on_configure_event)
self.connect("realize", self.on_realize)
self.plotter = None
self.plotbuffer = None
self.overlaybuffer = None
if xAxis is None:
xAxis = Axis(0, 600, wrap=True)
if yAxis is None:
yAxis = Axis(-1, 1)
self.xAxis = xAxis
self.yAxis = yAxis
gobject.timeout_add(50, self.draw)
def setXAxis(self, xAxis):
self.xAxis = xAxis
if self.realized:
self.plotter.setXAxis(self.xAxis)
self.overlayplotter.setXAxis(self.xAxis)
self.on_realize()
self.queue_draw()
def setYAxis(self, yAxis):
self.yAxis = yAxis
if self.realized:
self.plotter.setYAxis(self.yAxis)
self.overlayplotter.setYAxis(self.yAxis)
self.on_realize()
self.queue_draw()
def on_realize(self, widget=None):
self.realized = True
winctx = self.window.cairo_create()
if self.plotbuffer is None:
self.plotsize = (1600, 960)
self.plotbuffer = winctx.get_target().create_similar(cairo.CONTENT_COLOR_ALPHA,
self.plotsize[0], self.plotsize[1])
self.plotter = Plotter(self.plotbuffer, self.plotsize, self.datastore,
self.xAxis, self.yAxis, self.profiles)
overlaysize = self.size
self.overlaybuffer = winctx.get_target().create_similar(cairo.CONTENT_COLOR_ALPHA,
self.size[0], self.size[1])
self.overlayplotter = OverlayPlotter(self.overlaybuffer, overlaysize, self.xAxis, self.yAxis)
self.overlayplotter.draw()
def on_configure_event(self, widget, event):
self.size = (event.width, event.height)
self.on_realize(widget)
def on_expose_event(self, widget, event):
winctx = self.window.cairo_create()
winctx.set_source_rgba(*self.backgroundcolor)
winctx.paint()
winctx.save()
winctx.scale(self.size[0] / self.plotsize[0], self.size[1] / self.plotsize[1])
winctx.set_source_surface(self.plotbuffer)
winctx.paint()
winctx.restore()
winctx.set_source_surface(self.overlaybuffer)
winctx.paint_with_alpha(1.0)
def draw(self):
if self.plotter is not None:
damage = self.plotter.draw()
if damage is not None:
# FIXME: Would keeping better track of the damage increase performance?
self.queue_draw()
return True # Keep on timering