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"""
Test to see what level of click latency is noticeable.
"""
import time
from traits.api import Float
from enable.api import (Component, Container, ColorTrait, black_color_trait,
Window)
from enable.example_support import DemoFrame, demo_main
from kiva.constants import SWISS
from kiva.fonttools import Font
font = Font(family=SWISS)
class Box(Component):
color = ColorTrait("red")
delay = Float(0.50)
def _draw_mainlayer(self, gc, view=None, mode="default"):
if self.event_state == "clicked":
print "waiting %0.4f seconds... " % self.delay,
time.sleep(self.delay)
print "done."
with gc:
gc.set_fill_color(self.color_)
gc.rect(*(self.position + self.bounds))
gc.fill_path()
else:
with gc:
gc.set_stroke_color(self.color_)
gc.set_fill_color(self.color_)
gc.set_line_width(1.0)
gc.rect(*(self.position + self.bounds))
gc.stroke_path()
gc.set_font(font)
x,y = self.position
dx,dy = self.bounds
tx, ty, tdx, tdy = gc.get_text_extent(str(self.delay))
gc.set_text_position(x+dx/2-tdx/2, y+dy/2-tdy/2)
gc.show_text(str(self.delay))
def normal_left_down(self, event):
self.event_state = "clicked"
event.handled = True
self.request_redraw()
def clicked_left_up(self, event):
self.event_state = "normal"
event.handled = True
self.request_redraw()
class MyContainer(Container):
text_color = black_color_trait
def _draw_container_mainlayer(self, gc, view_bounds=None, mode="default"):
s = "Hold down the mouse button on the boxes."
with gc:
gc.set_font(font)
gc.set_fill_color(self.text_color_)
tx, ty, tdx, tdy = gc.get_text_extent(s)
x,y = self.position
dx,dy = self.bounds
gc.set_text_position(x+dx/2-tdx/2, y+dy-tdy-20)
gc.show_text(s)
class PlotFrame(DemoFrame):
def _create_window(self):
return Window(self, -1, component=container)
if __name__ == "__main__":
times_and_bounds = {0.5 : (60,200,100,100),
0.33 : (240,200,100,100),
0.25: (60,50,100,100),
0.10: (240,50,100,100)}
container = MyContainer(auto_size = False)
for delay, bounds in times_and_bounds.items():
box = Box()
container.add(box)
box.position = list(bounds[:2])
box.bounds = list(bounds[2:])
box.delay = delay
# Save demo so that it doesn't get garbage collected when run within
# existing event loop (i.e. from ipython).
demo = demo_main(PlotFrame, size=(400, 400),
title="Latency Test - Click a box")
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