def __init__(self, logger=None, rgbmap=None, settings=None):
ImageView.__init__(self,
logger=logger,
rgbmap=rgbmap,
settings=settings)
imgwin = Gtk.DrawingArea()
imgwin.connect("draw", self.draw_event)
imgwin.connect("configure-event", self.configure_event)
imgwin.set_events(Gdk.EventMask.EXPOSURE_MASK)
# prevents some flickering
imgwin.set_double_buffered(True)
imgwin.set_app_paintable(True)
# prevents extra redraws, because we manually redraw on a size
# change
imgwin.set_redraw_on_allocate(False)
self.imgwin = imgwin
self.imgwin.show_all()
# see reschedule_redraw() method
self._defer_task = GtkHelp.Timer()
self._defer_task.add_callback('expired',
lambda timer: self.delayed_redraw())
self.msgtask = GtkHelp.Timer()
self.msgtask.add_callback('expired',
lambda timer: self.onscreen_message(None))
def __init__(self, logger=None, rgbmap=None, settings=None):
ImageView.ImageViewBase.__init__(self,
logger=logger,
rgbmap=rgbmap,
settings=settings)
imgwin = Gtk.DrawingArea()
imgwin.connect("draw", self.draw_event)
imgwin.connect("configure-event", self.configure_event)
imgwin.set_events(Gdk.EventMask.EXPOSURE_MASK)
# prevents some flickering
imgwin.set_double_buffered(True)
imgwin.set_app_paintable(True)
# prevents extra redraws, because we manually redraw on a size
# change
imgwin.set_redraw_on_allocate(False)
self.imgwin = imgwin
self.imgwin.show_all()
self.t_.set_defaults(renderer='cairo')
# create our default double-buffered surface area that we copy
# to the widget
rect = self.imgwin.get_allocation()
x, y, wd, ht = rect.x, rect.y, rect.width, rect.height
arr = np.zeros((ht, wd, 4), dtype=np.uint8)
stride = cairo.ImageSurface.format_stride_for_width(
cairo.FORMAT_ARGB32, wd)
self.surface = cairo.ImageSurface.create_for_data(
arr, cairo.FORMAT_ARGB32, wd, ht, stride)
if sys.byteorder == 'little':
self.rgb_order = 'BGRA'
else:
self.rgb_order = 'ARGB'
# see reschedule_redraw() method
self._defer_task = GtkHelp.Timer()
self._defer_task.add_callback('expired',
lambda timer: self.delayed_redraw())
self.msgtask = GtkHelp.Timer()
self.msgtask.add_callback('expired',
lambda timer: self.onscreen_message(None))
self.renderer = None
# Pick a renderer that can work with us
renderers = ['cairo', 'agg', 'pil', 'opencv']
preferred = self.t_['renderer']
if preferred in renderers:
renderers.remove(preferred)
self.possible_renderers = [preferred] + renderers
self.choose_best_renderer()
def make_timer(self):
return GtkHelp.Timer()