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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
import cairo
import math
# This creates the custom LED widget
if __name__ == "__main__":
from hal_widgets import _HalWidgetBase, hal, hal_pin_changed_signal
else:
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_Bar(Gtk.DrawingArea, _HalWidgetBase):
__gtype_name__ = 'HAL_Bar'
__gsignals__ = dict([hal_pin_changed_signal])
__gproperties__ = {
'invert' : ( GObject.TYPE_BOOLEAN, 'Inverted', 'Invert min-max direction',
False, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'show_limits' : ( GObject.TYPE_BOOLEAN, 'Show Limits', 'Display upper and lower limit text',
True, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'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),
'zero' : ( GObject.TYPE_FLOAT, 'Zero', 'Zero value',
-MAX_INT, MAX_INT, 0, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'value' : ( GObject.TYPE_FLOAT, 'Value', 'Current bar value (for glade testing)',
-MAX_INT, MAX_INT, 0, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'target_value' : ( GObject.TYPE_FLOAT, 'Target_Value', 'Target value (for glade testing)',
-MAX_INT, MAX_INT, 0, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'target_width' : ( GObject.TYPE_FLOAT, 'Target Width', 'Target pixel width',
1, 5, 2, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'z0_color' : ( Gdk.Color.__gtype__, 'Zone 0 color', "Set color for first zone",
GObject.ParamFlags.READWRITE),
'z1_color' : ( Gdk.Color.__gtype__, 'Zone 1 color', "Set color for second zone",
GObject.ParamFlags.READWRITE),
'z2_color' : ( Gdk.Color.__gtype__, 'Zone 2 color', "Set color for third zone",
GObject.ParamFlags.READWRITE),
'target_color' : ( Gdk.Color.__gtype__, 'Target color', "Set color for target indicator",
GObject.ParamFlags.READWRITE),
'z0_border' : ( GObject.TYPE_FLOAT, 'Zone 0 up limit', 'Up limit (fraction) of zone 0',
0, 1, 1, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'z1_border' : ( GObject.TYPE_FLOAT, 'Zone 1 up limit', 'Up limit (fraction) of zone 1',
0, 1, 1, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
'bg_color' : ( Gdk.Color.__gtype__, 'Background', "Choose background color",
GObject.ParamFlags.READWRITE),
'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),
'text_template' : ( GObject.TYPE_STRING, 'Text template',
'Text template to display. Python formatting may be used for one variable',
"%s", GObject.ParamFlags.READWRITE|GObject.ParamFlags.CONSTRUCT),
'shiny' : ( GObject.TYPE_BOOLEAN, 'Shiny', 'Makes the bar shiny',
False, GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT),
}
__gproperties = __gproperties__
_size_request = (20, 20)
def __init__(self):
super(HAL_Bar, self).__init__()
self.bg_color = Gdk.Color.parse('gray')[1]
self.z0_color = Gdk.Color.parse('green')[1]
self.z1_color = Gdk.Color.parse('yellow')[1]
self.z2_color = Gdk.Color.parse('red')[1]
self.target_color = Gdk.Color.parse('purple')[1]
self.target_width = 2
self.force_width = self._size_request[0]
self.force_height = self._size_request[1]
self.set_size_request(*self._size_request)
self.connect("draw", self.expose)
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 _expose_prepare(self, widget):
if self.is_sensitive():
alpha = 1
else:
alpha = 0.3
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()
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(Gdk.Color.parse('black')[1])
#print w, h, aw, ah, fw, fh
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)
set_color(self.bg_color)
cr.rectangle(0, 0, w, h)
cr.stroke_preserve()
cr.fill()
return cr, (w, h), set_color, alpha
def _load_gradient(self, lg, alpha):
z0 = Gdk_color_tuple(self.z0_color) + (alpha,)
z1 = Gdk_color_tuple(self.z1_color) + (alpha,)
z2 = Gdk_color_tuple(self.z2_color) + (alpha,)
delta = 0.025
z0b = self.z0_border
z1b = max(z0b, self.z1_border)
lg.add_color_stop_rgba(0.00, *z0)
if z0b + delta > 1:
lg.add_color_stop_rgba(1.00, *z0)
return
lg.add_color_stop_rgba(max(0, z0b - delta), *z0)
lg.add_color_stop_rgba(min(1, z0b + delta), *z1)
if z0b + delta > z1b:
lg.add_color_stop_rgba(1.00, *z1)
return
lg.add_color_stop_rgba(max(0, z1b - delta), *z1)
lg.add_color_stop_rgba(min(1, z1b + delta), *z2)
lg.add_color_stop_rgba(1, *z2)
def do_get_property(self, property):
name = property.name.replace('-', '_')
if name in list(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 as e:
print("Invalid format string '%s': %s" % (value, e))
return False
if name in list(self.__gproperties.keys()):
setattr(self, name, value)
self.queue_draw()
else:
raise AttributeError('unknown property %s' % property.name)
if name in ['force_width', 'force_height']:
#print "Forcing size request %s" % name
self.set_size_request(self.force_width, self.force_height)
self.queue_draw()
return True
def set_value(self, value):
self.value = value
self.queue_draw()
def set_target_value(self, value):
self.target_value = value
self.queue_draw()
def get_value_diff(self, value):
value = max(self.min, min(value, self.max))
return (value - self.min) / (self.max - self.min)
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))
class HAL_HBar(HAL_Bar):
__gtype_name__ = 'HAL_HBar'
_size_request = (-1, 20)
def expose(self, widget, event):
cr, (w, h), set_color, alpha = self._expose_prepare(widget)
# make bar
set_color(Gdk.Color.parse('black')[1])
cr.save()
zv = w * self.get_value_diff(self.zero)
wv = w * self.get_value_diff(self.value)
if not self.invert:
cr.rectangle(zv, 0, wv - zv, h)
else:
cr.rectangle(w - wv, 0, wv - zv, h)
cr.clip_preserve()
cr.stroke_preserve()
bi_flag = bool((self.min == (- self.max)) and self.value < 0)
if self.invert or bi_flag:
lg = cairo.LinearGradient(w, 0, 0, 0)
else:
lg = cairo.LinearGradient(0, 0, w, 0)
self._load_gradient(lg, alpha)
cr.set_source(lg)
cr.fill()
cr.restore()
# now make it shiny
if self.shiny:
cr.rectangle(0, 0, w, h)
lg = cairo.LinearGradient(0, 0, 0, h)
lg.add_color_stop_rgba(0, 0, 0, 0, .5)
lg.add_color_stop_rgba(.16, 1, 1, 1, .25)
lg.add_color_stop_rgba(.33, 1, 1, 1, .75)
lg.add_color_stop_rgba(.66, 1, 1, 1, .25)
lg.add_color_stop_rgba(1, 0, 0, 0, .5)
cr.set_source(lg)
cr.fill()
# make target line
if self.target_value > 0:
set_color(self.target_color)
if self.target_value > self.max:
tvalue = self.max
else:
tvalue = self.target_value
wv = w * self.get_value_diff(tvalue)
cr.set_line_width(self.target_width)
if not self.invert:
cr.move_to(wv,0)
cr.rel_line_to(0,h)
else:
cr.move_to(w-wv,0)
cr.rel_line_to(0,h)
cr.stroke()
# write text
set_color(Gdk.Color.parse('black')[1])
tmpl = lambda s: self.text_template % s
if self.show_limits:
if not self.invert:
self.text_at(cr, tmpl(self.min), 5, h/2, 'left')
self.text_at(cr, tmpl(self.max), w-5, h/2, 'right')
else:
self.text_at(cr, tmpl(self.max), 5, h/2, 'left')
self.text_at(cr, tmpl(self.min), w-5, h/2, 'right')
self.text_at(cr, tmpl(self.value), w/2, h/2, 'center')
return False
class HAL_VBar(HAL_Bar):
__gtype_name__ = 'HAL_VBar'
_size_request = (25, -1)
def expose(self, widget, event):
cr, (w, h), set_color, alpha = self._expose_prepare(widget)
# make bar
cr.save()
set_color(Gdk.Color.parse('black')[1])
zv = h * self.get_value_diff(self.zero)
wv = h * self.get_value_diff(self.value)
if not self.invert:
cr.rectangle(0, h - wv, w, wv - zv)
else:
cr.rectangle(0, zv, w, wv - zv)
cr.clip_preserve()
cr.stroke_preserve()
bi_flag = bool((self.min == (- self.max)) and self.value < 0)
if self.invert or bi_flag:
lg = cairo.LinearGradient(0, 0, 0, h)
else:
lg = cairo.LinearGradient(0, h, 0, 0)
self._load_gradient(lg, alpha)
cr.set_source(lg)
cr.fill()
cr.restore()
# now make it shiny
if self.shiny:
cr.rectangle(0, 0, w, h)
lg = cairo.LinearGradient(0, 0, w, 0)
lg.add_color_stop_rgba(0, 0, 0, 0, .5)
lg.add_color_stop_rgba(.16, 1, 1, 1, .25)
lg.add_color_stop_rgba(.33, 1, 1, 1, .75)
lg.add_color_stop_rgba(.66, 1, 1, 1, .25)
lg.add_color_stop_rgba(1, 0, 0, 0, .5)
cr.set_source(lg)
cr.fill()
# make target line
if self.target_value > 0:
set_color(self.target_color)
if self.target_value > self.max:
tvalue = self.max
else:
tvalue = self.target_value
wv = h * self.get_value_diff(tvalue)
cr.set_line_width(self.target_width)
if not self.invert:
cr.move_to(0,h - wv)
cr.rel_line_to(w,0)
else:
#cr.rectangle(w - wv, 0, wv - zv, h)
cr.move_to(0,zv + wv)
cr.rel_line_to(w,0)
cr.stroke()
# make text
set_color(Gdk.Color.parse('black')[1])
tmpl = lambda s: self.text_template % s
if self.show_limits:
if not self.invert:
self.text_at(cr, tmpl(self.max), w/2, 5, yalign='top')
self.text_at(cr, tmpl(self.min), w/2, h-5, yalign='bottom')
else:
self.text_at(cr, tmpl(self.min), w/2, 5, yalign='top')
self.text_at(cr, tmpl(self.max), w/2, h-5, yalign='bottom')
self.text_at(cr, tmpl(self.value), w/2, h/2)
return False
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