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# vim: sts=4 sw=4 et
# GladeVcp Widgets
#
# Copyright (c) 2010 Pavel Shramov <shramov@mexmat.net>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
import gi
gi.require_version("Gtk","3.0")
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import GObject
from gi.repository import GLib
import cairo
import math
import time
from collections import deque
if __name__ == "__main__":
from hal_widgets import _HalWidgetBase, hal
else:
from .hal_widgets import _HalWidgetBase, hal
MAX_INT = 0x7fffffff
def Gdk_color_tuple(c):
if not c:
return 0, 0, 0
return c.red_float, c.green_float, c.blue_float
def mround(v, m):
vm = v % m
if vm == 0:
if v > 0: return v - m
if v < 0: return v + m
return 0
if v > 0: return v - vm
if v < 0: return v - vm + m
return 0
class HAL_Graph(Gtk.DrawingArea, _HalWidgetBase):
__gtype_name__ = 'HAL_Graph'
__gproperties__ = {
'min' : ( GObject.TYPE_FLOAT, 'Min', 'Minimum value',
-MAX_INT, MAX_INT, 0, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'max' : ( GObject.TYPE_FLOAT, 'Max', 'Maximum value',
-MAX_INT, MAX_INT, 100, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'autoscale' : ( GObject.TYPE_BOOLEAN, 'Autoscale', 'Autoscale Y axis',
False, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'period' : ( GObject.TYPE_FLOAT, 'Period', 'TIme period to display',
-MAX_INT, MAX_INT, 60, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'tick' : ( GObject.TYPE_INT, 'Tick period', 'Data acquarison pariod in ms',
100, 10000, 500, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'zero' : ( GObject.TYPE_FLOAT, 'Zero', 'Zero value',
-MAX_INT, MAX_INT, 0, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'value' : ( GObject.TYPE_FLOAT, 'Value', 'Current meter value (for glade testing)',
-MAX_INT, MAX_INT, 0, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'yticks' : ( GObject.TYPE_FLOAT, 'Y Tick scale', 'Ticks on Y scale',
0, MAX_INT, 10, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'xticks' : ( GObject.TYPE_FLOAT, 'X Tick scale', 'Ticks on X scale (in seconds)',
0, MAX_INT, 10, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'fg_color' : ( Gdk.Color.__gtype__, 'Graph color', "Set graphing color",
GObject.ParamFlags.READWRITE),
'bg_color' : ( Gdk.Color.__gtype__, 'Background', "Choose background color",
GObject.ParamFlags.READWRITE),
'fg_fill' : ( GObject.TYPE_BOOLEAN, 'Fill graph', 'Fill area covered with graph',
False, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'force_width' : ( GObject.TYPE_INT, 'Forced width', 'Force bar width not dependent on widget size. -1 to disable',
-1, MAX_INT, -1, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'force_height' : ( GObject.TYPE_INT, 'Forced height', 'Force bar height not dependent on widget size. -1 to disable',
-1, MAX_INT, -1, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'time_format' : ( GObject.TYPE_STRING, 'Time format',
'Time format to display. Use any strftime capable formatting',
"%M:%S", GObject.ParamFlags.READWRITE|GObject.ParamFlags.CONSTRUCT),
'label' : ( GObject.TYPE_STRING, 'Graph label', 'Label to display',
"", GObject.ParamFlags.READWRITE|GObject.ParamFlags.CONSTRUCT),
'sublabel' : ( GObject.TYPE_STRING, 'Graph sub label', 'Sub text to display',
"", GObject.ParamFlags.READWRITE|GObject.ParamFlags.CONSTRUCT),
}
__gproperties = __gproperties__
def __init__(self):
super(HAL_Graph, self).__init__()
self.bg_color = Gdk.Color.parse('white')[1]
self.fg_color = Gdk.Color.parse('red')[1]
self.force_radius = None
self.ticks = deque()
self.ticks_saved = []
self.time_strings = {}
self.tick_period = 0.1
self.connect("button-press-event", self.snapshot)
self.connect("draw", self.expose)
self.add_events(Gdk.EventMask.BUTTON_PRESS_MASK)
self.tick = 500
self.tick_idx = 0
self.hal_pin = 0
GLib.timeout_add(self.tick, self.tick_poll, self.tick_idx)
def _hal_init(self):
_HalWidgetBase._hal_init(self)
self.hal_pin = self.hal.newpin(self.hal_name, hal.HAL_FLOAT, hal.HAL_IN)
def tick_poll(self, idx):
if self.tick_idx != idx:
return False
v = self.hal_pin and self.hal_pin.get()
now = time.time()
for (t,_) in list(self.ticks):
if t >= now - self.period:
break
self.ticks.popleft()
self.ticks.append((now, v))
self.queue_draw()
return True
def snapshot(self, widget, event):
if event.button != 1:
return
if self.ticks_saved:
self.ticks_saved = []
else:
self.ticks_saved = list(self.ticks)
def expose(self, widget, event):
w = self.get_allocated_width()
h = self.get_allocated_height()
fw = self.force_width
fh = self.force_height
aw = max(w, fw)
ah = max(h, fh)
#self.set_size_request(aw, ah)
if fw != -1: w = fw
if fh != -1: h = fh
cr = widget.get_property('window').cairo_create()
cr.set_line_width(2)
cr.set_source_rgb(0, 0, 0)
#print w, h, aw, ah, fw, fh
cr.set_line_width(2)
cr.translate((aw - w) / 2, (ah - h) / 2)
cr.rectangle(0, 0, w, h)
cr.clip_preserve()
cr.stroke()
cr.translate(1, 1)
w, h = w - 2, h - 2
cr.set_line_width(1)
cr.set_source_rgb(self.bg_color.red, self.bg_color.green, self.bg_color.blue)
cr.rectangle(0, 0, w, h)
cr.stroke_preserve()
cr.fill()
#tw = self.tick_period * w / self.period
tnow = now = time.time()
if self.ticks_saved:
now = max(map(lambda x: x[0], self.ticks_saved))
cr.set_source_rgb(0, 0, 0)
def t2x(t, n=now):
p = (t - n + self.period) / self.period
if p < 0 or p > 1:
return None
return w * p
font_small = max(h/20, 10)
font_large = max(h/10, 20)
cr.set_font_size(font_small)
ymin, ymax = self.min, self.max
yticks = self.yticks
if self.autoscale:
tv = [x[1] for x in self.ticks_saved + list(self.ticks)]
if tv:
ymin, ymax = min(tv), max(tv)
ymin -= abs(ymin) * 0.1
ymax += abs(ymax) * 0.1
else:
ymin, ymax = -1.1, 1.1
yticks = 0
if not yticks:
if ymin == ymax:
ymin -= max(1, abs(ymin) * 0.1)
ymax += max(1, abs(ymax) * 0.1)
#print ymax, ymin, ymax - ymin
yround = 10 ** math.floor(math.log10((ymax - ymin) / 10))
yticks = mround((ymax - ymin) / 10, yround)
self.draw_xticks(cr, w, h, self.xticks, now, t2x)
self.draw_yticks(cr, w, h, ymin, ymax, yticks)
cr.set_source_rgb(0, 0, 0)
cr.set_font_size(font_large)
self.text_at(cr, self.label, w/2, font_large, yalign='top')
cr.set_font_size(font_small)
self.text_at(cr, self.sublabel, w/2, 2.5 * font_large, yalign='top')
cr.set_source_rgb(self.fg_color.red, self.fg_color.green, self.fg_color.blue)
if self.ticks_saved:
self.draw_graph(cr, w, h, ymin, ymax, self.ticks_saved, t2x)
cr.set_source_rgba(*(Gdk_color_tuple(self.fg_color) + (0.3,)))
self.draw_graph(cr, w, h, ymin, ymax, self.ticks, lambda t: t2x(t, tnow))
if not self.is_sensitive():
cr.set_source_rgba(0, 0, 0, 0.3)
cr.set_operator(cairo.OPERATOR_DEST_OUT)
cr.rectangle(0, 0, w, h)
cr.stroke_preserve()
cr.fill()
return True
def text_at(self, cr, text, x, y, xalign='center', yalign='center'):
xbearing, ybearing, width, height, xadvance, yadvance = cr.text_extents(text)
#print xbearing, ybearing, width, height, xadvance, yadvance
if xalign == 'center':
x = x - width/2
elif xalign == 'right':
x = x - width
if yalign == 'center':
y = y + height/2
elif yalign == 'top':
y = y + height
cr.move_to(x, y)
cr.show_text(text)
def draw_graph(self, cr, w, h, ymin, ymax, ticks, t2x):
move = True
for (t, v) in ticks:
if v is None:
move = True
continue
v = min(max(v, ymin), ymax)
x = t2x(t)
if x is None:
move = True
continue
y = h * (1 - (v - ymin)/(ymax - ymin))
if move:
cr.move_to(x, y)
move = False
cr.line_to(x, y)
cr.stroke()
def draw_xticks(self, cr, w, h, xticks, now, t2x):
rnow = mround(now, xticks)
for t in range(0, int(self.period / xticks)):
ts = int(rnow - t * xticks)
x = t2x(ts)
if x is None: continue
cr.move_to(x, h)
cr.line_to(x, 0.98 * h)
s = self.time_string(ts)
self.text_at(cr, s, x, 0.96 * h, yalign='bottom')
cr.stroke()
def draw_yticks(self, cr, w, h, ymin, ymax, yticks):
ysize = ymax - ymin
rmax = mround(ymax, yticks)
rmin = mround(ymin, yticks)
rsize = rmax - rmin
for t in range(0, int(rsize / yticks) + 1):
v = rmin + yticks * t
y = h * (1 - (v - ymin)/ ysize)
cr.move_to(0, y)
cr.line_to(w/100, y)
cr.move_to(w, y)
cr.line_to(w - w/100, y)
self.text_at(cr, str(v), 0.02 * w, y, xalign='left', yalign='center')
cr.stroke()
cr.set_source_rgba(0.5, 0.5, 0.5, 0.5)
for t in range(0, int(rsize / yticks) + 1):
v = rmin + yticks * t
y = h * (1 - (v - ymin)/ ysize)
cr.move_to(0.1*w, y)
cr.line_to(0.9*w, y)
cr.stroke()
def time_string(self, ts):
if ts in self.time_strings:
return self.time_strings[ts]
s = time.strftime(self.time_format, time.localtime(ts))
self.time_strings[ts] = s
return s
def time_strings_clean(self, now):
for k in filter(lambda k: k < now):
del self.time_strings[k]
def set_value(self, v):
self.value = v
self.queue_draw()
def do_get_property(self, property):
name = property.name.replace('-', '_')
if name in self.__gproperties.keys():
return getattr(self, name)
else:
raise AttributeError('unknown property %s' % property.name)
def do_set_property(self, property, value):
name = property.name.replace('-', '_')
if name == 'tick':
self.tick_idx += 1
GLib.timeout_add(value, self.tick_poll, self.tick_idx)
if name in ['bg_color', 'fg_color']:
if not value:
return False
if name in self.__gproperties.keys():
setattr(self, name, value)
self.queue_draw()
else:
raise AttributeError('unknown property %s' % property.name)
if name in ['force_size', 'force_size']:
#print "Forcing size request %s" % name
self.set_size_request(self.force_size, self.force_size)
self.queue_draw()
return True
|
