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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 gtk
import gobject
import cairo
import math
import gtk.glade
from hal_widgets import _HalWidgetBase, hal, hal_pin_changed_signal
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
class HAL_Meter(gtk.DrawingArea, _HalWidgetBase):
__gtype_name__ = 'HAL_Meter'
__gsignals__ = dict([hal_pin_changed_signal])
__gproperties__ = {
'invert' : ( gobject.TYPE_BOOLEAN, 'Inverted', 'Invert min-max direction',
False, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'min' : ( gobject.TYPE_FLOAT, 'Min', 'Minimum value',
-MAX_INT, MAX_INT, 0, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'max' : ( gobject.TYPE_FLOAT, 'Max', 'Maximum value',
-MAX_INT, MAX_INT, 100, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'value' : ( gobject.TYPE_FLOAT, 'Value', 'Current meter value (for glade testing)',
-MAX_INT, MAX_INT, 0, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'majorscale' : ( gobject.TYPE_FLOAT, 'Major scale', 'Major ticks',
-MAX_INT, MAX_INT, 10, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'minorscale' : ( gobject.TYPE_FLOAT, 'Minor scale', 'Minor ticks',
-MAX_INT, MAX_INT, 2, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'z0_color' : ( gtk.gdk.Color.__gtype__, 'Zone 0 color', "Set color for first zone",
gobject.PARAM_READWRITE),
'z1_color' : ( gtk.gdk.Color.__gtype__, 'Zone 1 color', "Set color for second zone",
gobject.PARAM_READWRITE),
'z2_color' : ( gtk.gdk.Color.__gtype__, 'Zone 2 color', "Set color for third zone",
gobject.PARAM_READWRITE),
'z0_border' : ( gobject.TYPE_FLOAT, 'Zone 0 up limit', 'Up limit of zone 0',
-MAX_INT, MAX_INT, MAX_INT, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'z1_border' : ( gobject.TYPE_FLOAT, 'Zone 1 up limit', 'Up limit of zone 1',
-MAX_INT, MAX_INT, MAX_INT, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'bg_color' : ( gtk.gdk.Color.__gtype__, 'Background', "Choose background color",
gobject.PARAM_READWRITE),
'force_size' : ( gobject.TYPE_INT, 'Forced size', 'Force meter size not dependent on widget size. -1 to disable',
-1, MAX_INT, -1, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'text_template' : ( gobject.TYPE_STRING, 'Text template',
'Text template to display. Python formatting may be used for one variable',
"%s", gobject.PARAM_READWRITE|gobject.PARAM_CONSTRUCT),
'label' : ( gobject.TYPE_STRING, 'Meter label', 'Label to display',
"", gobject.PARAM_READWRITE|gobject.PARAM_CONSTRUCT),
'sublabel' : ( gobject.TYPE_STRING, 'Meter sub label', 'Sub text to display',
"", gobject.PARAM_READWRITE|gobject.PARAM_CONSTRUCT),
}
__gproperties = __gproperties__
def __init__(self):
super(HAL_Meter, self).__init__()
self.bg_color = gtk.gdk.Color('white')
self.z0_color = gtk.gdk.Color('green')
self.z1_color = gtk.gdk.Color('yellow')
self.z2_color = gtk.gdk.Color('red')
self.force_radius = None
self.connect("expose-event", self.expose)
def _hal_init(self):
_HalWidgetBase._hal_init(self)
self.hal_pin = self.hal.newpin(self.hal_name, hal.HAL_FLOAT, hal.HAL_IN)
self.hal_pin.connect('value-changed', lambda p: self.set_value(p.value))
self.hal_pin.connect('value-changed', lambda s: self.emit('hal-pin-changed', s))
def expose(self, widget, event):
if self.flags() & gtk.PARENT_SENSITIVE:
alpha = 1
else:
alpha = 0.3
w = self.allocation.width
h = self.allocation.height
r = min(w, h) / 2
fr = self.force_size
if fr > 0: r = min(fr, r)
if r < 20:
r = 40
self.set_size_request(2 * r, 2 * r)
cr = widget.window.cairo_create()
def set_color(c):
return cr.set_source_rgba(c.red_float, c.green_float, c.blue_float, alpha)
cr.set_line_width(2)
set_color(gtk.gdk.Color('black'))
#print w, h, aw, ah, fw, fh
cr.translate(w / 2, h / 2)
cr.arc(0, 0, r, 0, 2*math.pi)
cr.clip_preserve()
cr.stroke()
r -= 1
cr.set_line_width(1)
set_color(self.bg_color)
cr.arc(0, 0, r, 0, 2*math.pi)
cr.stroke_preserve()
cr.fill()
a_delta = math.pi / 6
a_start = 0.5 * math.pi + a_delta
a_size = 2 * math.pi - 2 * a_delta
def angle(v):
size = self.max - self.min
v = max(self.min, v)
v = min(self.max, v)
return a_start + a_size * (v - self.min) / size
set_color(self.z2_color)
self.draw_zone(cr, r, angle(self.z1_border), angle(self.max))
set_color(self.z1_color)
self.draw_zone(cr, r, angle(self.z0_border), angle(self.z1_border))
set_color(self.z0_color)
self.draw_zone(cr, r, angle(self.min), angle(self.z0_border))
set_color(gtk.gdk.Color('black'))
cr.set_font_size(r/10)
v = self.min
while v <= self.max:
if int(v) - v == 0: v = int(v)
self.draw_tick(cr, r, 0.15 * r, angle(v), text=str(v))
v += self.majorscale
v = self.min
while v <= self.max:
self.draw_tick(cr, r, 0.05 * r, angle(v))
v += self.minorscale
self.text_at(cr, self.sublabel, 0, r/5)
cr.set_font_size(r/5)
self.text_at(cr, self.label, 0, -r/5)
set_color(gtk.gdk.Color('red'))
self.draw_arrow(cr, r, angle(self.value))
set_color(gtk.gdk.Color('black'))
self.text_at(cr, self.text_template % self.value, 0, 0.8 * r)
return True
def draw_zone(self, cr, r, start, stop):
cr.arc(0, 0, r, start, stop)
cr.line_to(0.9 * r * math.cos(stop), 0.9 * r * math.sin(stop))
cr.arc_negative(0, 0, 0.9 * r, stop, start)
cr.line_to(r * math.cos(start), r * math.sin(start))
cr.stroke_preserve()
cr.fill()
def draw_tick(self, cr, r, sz, a, text=None):
cr.move_to((r - sz) * math.cos(a), (r - sz) * math.sin(a))
cr.line_to(r * math.cos(a), r * math.sin(a))
cr.stroke()
if not text:
return
self.text_at(cr, text, 0.75 * r * math.cos(a), 0.75 * r * math.sin(a))
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_arrow(self, cr, r, a):
cr.rotate(a)
cr.move_to(0, 0)
cr.line_to(-r/10, r/20)
cr.line_to(0.8 * r, 0)
cr.line_to(-r/10, -r/20)
cr.line_to(0, 0)
cr.stroke_preserve()
cr.fill()
cr.rotate(-a)
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 == 'text_template':
try:
v = value % 0.0
except Exception, e:
print "Invalid format string '%s': %s" % (value, e)
return False
if name in ['bg_color', 'z0_color', 'z1_color', 'z2_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
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