class Scaled(Widget):
def __init__(self, **kwargs):
super(Scaled, self).__init__(**kwargs)
self.elements = []
self.pointsize = 5 # this multiplies by two according to kivy docs
with self.canvas:
self._fbo = Fbo(size=self.size)
self._rect = Rectangle(texture=self._fbo.texture)
with self._fbo:
Color(1, 1, 1)
self._fborect = Rectangle(size=self._fbo.size)
Color(0, 0, 1)
self._points = Point(pointsize=self.pointsize)
self._fbo.add_reload_observer(self._clear_fbo)
self.bind(pos=self._update_rect, size=self._update_rect)
def drawpoint(self, x, y):
self.elements.append([x, y])
self._points.add_point(x, y)
def draw(self, matrix):
self._points.points = []
self._clear_fbo()
for point in matrix:
x = int(point[0] * (self.pointsize * 2) + self.pointsize)
y = int(point[1] * (self.pointsize * 2) + self.pointsize)
self.drawpoint(x, y)
# RELOADING THE BUFFER AT ANY CHANGE
def _clear_fbo(self, fbo=None):
''' This will reload the framebufferer either by the call of the
observer or by the deletion of a point'''
if fbo is None:
fbo = self._fbo
fbo.bind()
fbo.clear_buffer()
fbo.add(Color(1, 1, 1))
fbo.add(self._fborect)
fbo.add(Color(0, 0, 1))
fbo.add(self._points)
fbo.release()
def _update_rect(self, instance, value):
self._fbo.size = instance.size
self._fborect.size = instance.size
self._rect.size = instance.size
self._rect.pos = instance.pos
self._rect.texture = self._fbo.texture
class Scaled(Widget):
def __init__(self, **kwargs):
super(Scaled, self).__init__(**kwargs)
self.elements = []
self.pointsize = 5 # this multiplies by two according to kivy docs
with self.canvas:
self._fbo = Fbo(size=self.size)
self._rect = Rectangle(texture=self._fbo.texture)
with self._fbo:
Color(1, 1, 1)
self._fborect = Rectangle(size=self._fbo.size)
Color(0, 0, 1)
self._points = Point(pointsize=self.pointsize)
self._fbo.add_reload_observer(self._clear_fbo)
self.bind(pos=self._update_rect, size=self._update_rect)
def drawpoint(self, x, y):
self.elements.append([x, y])
self._points.add_point(x, y)
def draw(self, matrix):
self._points.points = []
self._clear_fbo()
for point in matrix:
x = int(point[0] * (self.pointsize * 2) + self.pointsize)
y = int(point[1] * (self.pointsize * 2) + self.pointsize)
self.drawpoint(x, y)
# RELOADING THE BUFFER AT ANY CHANGE
def _clear_fbo(self, fbo=None):
""" This will reload the framebufferer either by the call of the
observer or by the deletion of a point"""
if fbo is None:
fbo = self._fbo
fbo.bind()
fbo.clear_buffer()
fbo.add(Color(1, 1, 1))
fbo.add(self._fborect)
fbo.add(Color(0, 0, 1))
fbo.add(self._points)
fbo.release()
def _update_rect(self, instance, value):
self._fbo.size = instance.size
self._fborect.size = instance.size
self._rect.size = instance.size
self._rect.pos = instance.pos
self._rect.texture = self._fbo.texture
def test_point_add(self):
from kivy.uix.widget import Widget
from kivy.graphics import Point, Color
r = self.render
wid = Widget()
with wid.canvas:
Color(1, 1, 1)
p = Point(pointsize=10)
p.add_point(10, 10)
p.add_point(90, 10)
p.add_point(10, 90)
p.add_point(50, 50)
p.add_point(10, 50)
p.add_point(50, 10)
r(wid)
def test_point_add(self):
from kivy.uix.widget import Widget
from kivy.graphics import Point, Color
r = self.render
wid = Widget()
with wid.canvas:
Color(1, 1, 1)
p = Point(pointsize=10)
p.add_point(10, 10)
p.add_point(90, 10)
p.add_point(10, 90)
p.add_point(50, 50)
p.add_point(10, 50)
p.add_point(50, 10)
r(wid)
class Grid( Widget ):
point_size = NumericProperty(10)
def __init__(self, **kwargs):
super(Grid, self).__init__(**kwargs)
# Which elements exist in the grid in the normalized coordinates
self.elements = []
# If active, it can't be modified
self.active = False
# To the canvas, we add the FrameBufferObject and the rect to show it
with self.canvas:
self.fbo = Fbo(size=self.size)
self.rect = Rectangle(texture=self.fbo.texture)
# Color(1,0,0)
# self.rect = Rectangle(size = self.size, pos = self.pos)
# To the FrameBufferObject I set the color and add the point list
with self.fbo:
Color(1,1,1)
self.points = Point( pointsize=self.point_size )
# add some observers to the fbo, changes for the point_size (grid
# resizing) and widget resizing
self.fbo.add_reload_observer(self._populate_fbo)
self.bind( point_size = self._reshape )
self.bind( size = self._update_rect, pos = self._update_rect )
def on_touch_down(self, touch):
''' Handle adding/removing points when the grid is not active'''
if not self.active and self.collide_point(*touch.pos):
# Move to a 0,0 from where the widget starts
x = touch.x - self.x
y = touch.y - self.y
self.add_point( [x,y] )
return True
return super(Grid, self).on_touch_down(touch)
def normalize(self, coords):
''' normalization of coordinates, it will transform any given point in
the widget to its corresponding normalized coords '''
# TODO: Create a picture to describe what are the normalized coordinates
if type(coords) is tuple:
coords = list(coords)
if type(coords) is list:
for ind in range(len(coords)):
coords[ind] = int( coords[ind] // ( self.points.pointsize * 2 ) )
return coords
else:
return int( coords // ( self.points.pointsize * 2 ) )
def adjust(self, coords):
''' adjustment of a normalized coordinate to the real coordinate using
the current point size as a guide '''
if type(coords) is tuple:
coords = list(coords)
if type(coords) is list:
for ind in range(len(coords)):
coords[ind] = int( coords[ind] * ( self.points.pointsize * 2 ) + self.points.pointsize )
return coords
else:
return int( coords * ( self.points.pointsize * 2 ) + self.points.pointsize )
def add_point(self, point, redraw=True):
''' method to add a point to the grid if it doesn't exist
if it's there, remove it'''
point = self.normalize(point)
if point in self.elements:
where = self.elements.index( point )
# Steal the reference to the vector of points
points = self.points.points
self.points.points = []
# Clean the desired point
del(points[where*2])
del(points[where*2])
# Reassign the property for the context to know (kivy weird things)
self.points.points = points
# Remove from the historical
del(self.elements[where])
# Redraw if asked for
if redraw:
self._populate_fbo(self.fbo)
else:
# add the normalized coords to the element list
# it has to be copied because the adjust method will modify
# the elements in points
self.elements.append(point[:])
# add the point to the visible points using the adjusted coordinates
# the * leading self.adjust is to unpack the resulting array
self.points.add_point( *self.adjust(point) )
# print(self.elements)
def next(self, instance):
if len(self.elements) == 0: return
# calculate the survivors
nextgen = automaton.survivors(self.elements)
# print(nextgen)
# calculate any possible newborns
nextgen += automaton.births(self.elements)
# print(nextgen)
# replace the current elements
self.elements = nextgen
# The vector comes with minivectors within, which is fine for the
# list of elements but doesn't work for the adjustment of points in
# the screen
nextgen = [ i for cell in nextgen for i in cell ]
# adjust the elements to the actual coordinates
nextgen = self.adjust( nextgen )
# assign the vector back
self.points.points = nextgen
# redraw
self._populate_fbo()
def clear(self, instance):
self.elements = []
self.points.points = []
self._populate_fbo()
# RELOADING THE BUFFER AT ANY CHANGE
def _populate_fbo(self, fbo = None):
''' This will reload the framebufferer either by the call of the
observer or by the deletion of a point'''
if fbo is None:
fbo = self.fbo
fbo.bind()
fbo.clear_buffer()
fbo.add(self.points)
fbo.release()
def _reshape(self, instance, value):
# There are no elements
if len(self.elements) == 0:
# We just update the points to be drawn
self.points.pointsize = self.point_size
# If we do have elements
else:
# steal the reference to the vector
points = self.points.points
self.points.points = []
# normalize using current value
points = self.normalize( points )
# reassing the value
self.points.pointsize = self.point_size
# adjust using new value
points = self.adjust( points )
# assign the vector back
self.points.points = points
# redraw
self._populate_fbo()
# REDRAWING THE FBO AND THE
def _update_rect( self, instance, value ):
self.fbo.size = instance.size
self.rect.size = instance.size
self.rect.pos = instance.pos
self.rect.texture = self.fbo.texture
def update_canvas(self, *args):
for i, value in enumerate(self.values):
self._previous_values.append(None)
if self.needles_props:
props = self.needles_props[i]
color = Color(* props.get('color') or \
((i%3)*.5, ((i+1)%3)*.5, ((i+2)%3*.5)))
length = props.get('length') or 1.0
width = props.get('width') or 1.0
else:
color = Color((i % 3) * .5, ((i + 1) % 3) * .5,
((i + 2) % 3 * .5))
length = 1.0
width = 2.0
self._needles_props.append({
'color': color,
'width': width,
'length': length
})
self._needles.append(InstructionGroup())
self.canvas.clear()
x0, y0 = self.pos
with self.canvas:
e_width = self.width / 2
e_height = self.height / 2
# Default color
Color(1, 1, 1)
# Labels
if self.labels:
for value, text in self.labels:
angle = self.begin - \
((self.begin-self.end) / (self.maxi - self.mini) * value)
pos = ellipse(x0 + e_width, y0 + e_height, e_width - 30,
e_height - 30, angle)
self._labels.append(
Label(
text=text,
color=(1, 1, 1, .5),
pos=pos,
size=('1dp', '1dp'), #self.texture_size,
font_size='20sp',
bold=True))
x1, y1 = ellipse(x0 + e_width, y0 + e_height, e_width,
e_height, angle)
x2, y2 = ellipse(x0 + e_width, y0 + e_height, e_width - 10,
e_height - 10, angle)
Line(
points=[x1, y1, x2, y2],
width=2,
#cap = 'round',
close=False)
else:
# Default : label on dizains
for i in range(0, -self.mini + self.maxi + 1, 10):
angle = self.begin - \
((self.begin-self.end) / (self.maxi - self.mini) * i)
pos = ellipse(x0 + e_width, y0 + e_height, e_width - 30,
e_height - 30, angle)
self._labels.append(
Label(
text='%d' % (i + self.mini),
color=(1, 1, 1, .5),
pos=pos,
size=('1dp', '1dp'), #self.texture_size,
font_size='20sp',
bold=True))
x1, y1 = ellipse(x0 + e_width, y0 + e_height, e_width,
e_height, angle)
x2, y2 = ellipse(x0 + e_width, y0 + e_height, e_width - 10,
e_height - 10, angle)
Line(
points=[x1, y1, x2, y2],
width=2,
#cap = 'round',
close=False)
# Graduations
p = Point()
if self.graduations:
pass # XXX TODO
else:
# Default : point on units
for i in range(0, -self.mini + self.maxi + 1):
angle = self.begin - \
((self.begin-self.end) / (self.maxi - self.mini) * i)
if i % 10 == 0:
# Label, no graduation
continue
x, y = ellipse(x0 + e_width, y0 + e_height, e_width - 5,
e_height - 5, angle)
p.add_point(x, y)
# Save values used in update_values to display needle(s)
self._e_width = e_width
self._e_height = e_height
self._scale = (self.begin - self.end) / (self.maxi - self.mini)
self._x0, self._y0 = self.pos[0] + e_width, self.pos[1] + e_height
self._ready = True
# Display needle(s)
self.update_values()