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#!/usr/bin/env python
from gtk import *
from gtkextra import *
from random import randint
class Application(GtkWindow):
def __init__(self):
GtkWindow.__init__(self, title="GtkPlot Real Time Demo")
self.set_usize(550, 600)
self.connect("destroy", mainquit)
colormap = self.get_colormap()
red = colormap.alloc("red")
light_blue = colormap.alloc("light blue")
light_yellow = colormap.alloc("light yellow")
white = colormap.alloc("white")
scrollwin = GtkScrolledWindow()
scrollwin.set_policy(POLICY_AUTOMATIC, POLICY_AUTOMATIC)
self.add(scrollwin)
canvas = GtkPlotCanvas(PLOT_LETTER_W, PLOT_LETTER_H)
canvas.set_background(light_blue)
canvas.connect("button_press_event", self.button_press_handler)
scrollwin.add_with_viewport(canvas)
plot = GtkPlot(width=0.65, height=0.45)
plot.set_background(light_yellow)
plot.legends_set_attributes(None, 0, None, white)
plot.set_range(0.0, 20.0, 0.0, 1.0)
plot.axis_set_ticks(PLOT_AXIS_X, 2.0, 1)
plot.axis_set_ticks(PLOT_AXIS_Y, 0.1, 1)
plot.axis_set_labels_numbers(PLOT_AXIS_TOP, PLOT_LABEL_FLOAT, 0)
plot.axis_set_labels_numbers(PLOT_AXIS_BOTTOM, PLOT_LABEL_FLOAT, 0)
plot.axis_set_visible(PLOT_AXIS_TOP, TRUE)
plot.axis_set_visible(PLOT_AXIS_RIGHT, TRUE)
plot.grids_set_visible(TRUE, TRUE, TRUE, TRUE)
plot.axis_hide_title(PLOT_AXIS_TOP)
plot.axis_hide_title(PLOT_AXIS_RIGHT)
plot.axis_set_title(PLOT_AXIS_LEFT, "Intensity")
plot.axis_set_title(PLOT_AXIS_BOTTOM, "Time (s)")
plot.set_legends_border(PLOT_BORDER_SHADOW, 3)
plot.legends_move(0.60, 0.10)
canvas.add_plot(plot, 0.15, 0.15)
canvas.put_text(0.45, 0.05, "Times-BoldItalic", 20, 0, None, None,
TRUE, JUSTIFY_CENTER, "Real Time Demo")
data = GtkPlotData()
plot.add_data(data)
data.set_legend("Random pulse")
data.set_symbol(PLOT_SYMBOL_DIAMOND, PLOT_SYMBOL_OPAQUE, 10, 2, red)
data.set_line_attributes(PLOT_LINE_SOLID, 1, red)
plot.clip_data(TRUE)
self.show_all()
timeout_add(1000, self.update, canvas, plot, data)
def update(self, canvas, plot, data, *args):
y = randint(0, 9) / 10.0
px = data.get_x()
py = data.get_y()
n = data.get_numpoints()
if n == 0:
x = 1.0
else:
x = px[n - 1] + 1.0
px.append(x)
py.append(y)
data.set_points(px, py)
(xmin, xmax) = plot.get_xrange()
if x > xmax:
plot.set_xrange(xmin + 5.0, xmax + 5.0)
canvas.paint()
canvas.refresh()
return TRUE
def button_press_handler(self, canvas, event, *extra):
(x, y) = canvas.get_pointer()
position = canvas.get_position(x, y)
print "Canvas position:", position[0], position[1]
def mainloop(self):
mainloop()
if __name__ == '__main__':
app = Application()
app.mainloop()
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