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deflector.py
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deflector.py
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'''
Deflectouch
Copyright (C) 2012 Cyril Stoller
For comments, suggestions or other messages, contact me at:
<cyril.stoller@gmail.com>
This file is part of Deflectouch.
Deflectouch 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 3 of the License, or
(at your option) any later version.
Deflectouch is distributed in the hope that it will be fun,
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.
You should have received a copy of the GNU General Public License
along with Deflectouch. If not, see <http://www.gnu.org/licenses/>.
'''
import kivy
kivy.require('1.0.9')
from kivy.graphics import Line, Color
from kivy.properties import ObjectProperty, NumericProperty
from kivy.uix.scatter import Scatter
from kivy.graphics.transformation import Matrix
from math import atan2
MIN_DEFLECTOR_LENGTH = 100
GRAB_RADIUS = 30
class Deflector(Scatter):
touch1 = ObjectProperty(None)
touch2 = ObjectProperty(None)
point1 = ObjectProperty(None)
point2 = ObjectProperty(None)
deflector_line = ObjectProperty(None)
length = NumericProperty(0)
length_origin = 0
point_pos_origin = []
'''
####################################
##
## Class Initialisation
##
####################################
'''
def __init__(self, **kwargs):
super(Deflector, self).__init__(**kwargs)
# DEFLECTOR LINE:
# Here I rotate and translate the deflector line so that it lays exactly under the two fingers
# and can be moved and scaled by scatter from now on. Thus I also have to pass the touches to scatter.
# First i create the line perfectly horizontal but with the correct length. Then i add the two
# drag points at the beginning and the end.
self.length_origin = self.length
with self.canvas.before:
Color(.8, .8, .8)
self.deflector_line = Line(points=(self.touch1.x, self.touch1.y - 1, self.touch1.x + self.length, self.touch1.y - 1))
self.deflector_line2 = Line(points=(self.touch1.x, self.touch1.y + 1, self.touch1.x + self.length, self.touch1.y + 1))
'''
self.deflector_line = Image(source='graphics/beta/deflector_blue_beta2.png',
allow_stretch=True,
keep_ratio=False,
size=(self.length, 20),
center_y=(self.touch1.y),
x=self.touch1.x)
'''
# set the right position for the two points:
self.point1.center = self.touch1.pos
self.point2.center = self.touch1.x + self.length, self.touch1.y
self.point_pos_origin = [self.point1.x, self.point1.y, self.point2.x, self.point2.y]
# rotation:
dx = self.touch2.x - self.touch1.x
dy = self.touch2.y - self.touch1.y
angle = atan2(dy, dx)
rotation_matrix = Matrix().rotate(angle, 0, 0, 1)
self.apply_transform(rotation_matrix, post_multiply=True, anchor=self.to_local(self.touch1.x, self.touch1.y))
# We have to adjust the bounding box of ourself to the dimension of all the canvas objects (Do we have to?)
#self.size = (abs(self.touch2.x - self.touch1.x), abs(self.touch2.y - self.touch1.y))
#self.pos = (min(self.touch1.x, self.touch2.x), min(self.touch1.y, self.touch2.y))
# Now we finally add both touches we received to the _touches list of the underlying scatter class structure.
self.touch1.grab(self)
self._touches.append(self.touch1)
self._last_touch_pos[self.touch1] = self.touch1.pos
self.touch2.grab(self)
self._touches.append(self.touch2)
self._last_touch_pos[self.touch2] = self.touch2.pos
self.point1.bind(size=self.size_callback)
def size_callback(self, instance, size):
# problem: if the points are resized (scatter resized them, kv-rule resized them back),
# their center isn't on the touch point anymore.
self.point1.pos = self.point_pos_origin[0] + (40 - size[0])/2, self.point_pos_origin[1] + (40 - size[0])/2
self.point2.pos = self.point_pos_origin[2] + (40 - size[0])/2, self.point_pos_origin[3] + (40 - size[0])/2
# feedback to the stockbar: reducing of the deflector material stock:
#self.length = Vector(self.touch1.pos).distance(self.touch2.pos)
self.length = self.length_origin * self.scale
try:
self.parent.parent.stockbar.recalculate_stock()
except Exception, e:
return
# get the current stock from the root widget:
current_stock = self.parent.parent.stockbar.width
stock_for_me = current_stock + self.length
# now set the limitation for scaling:
self.scale_max = stock_for_me / self.length_origin
if self.length < MIN_DEFLECTOR_LENGTH:
self.point1.color = (1, 0, 0, 1)
self.point2.color = (1, 0, 0, 1)
else:
self.point1.color = (0, 0, 1, 1)
self.point2.color = (0, 0, 1, 1)
def collide_widget(self, wid):
point1_parent = self.to_parent(self.point1.center[0], self.point1.center[1])
point2_parent = self.to_parent(self.point2.center[0], self.point2.center[1])
if max(point1_parent[0], point2_parent[0]) < wid.x:
return False
if min(point1_parent[0], point2_parent[0]) > wid.right:
return False
if max(point1_parent[1], point2_parent[1]) < wid.y:
return False
if min(point1_parent[1], point2_parent[1]) > wid.top:
return False
return True
def collide_point(self, x, y):
# this function is used exclusively by the underlying scatter functionality.
# therefor i can control when a touch will be dispatched from here.
point1_parent = self.to_parent(self.point1.center[0], self.point1.center[1])
point2_parent = self.to_parent(self.point2.center[0], self.point2.center[1])
return min(point1_parent[0], point2_parent[0]) - GRAB_RADIUS <= x <= max(point1_parent[0], point2_parent[0]) + GRAB_RADIUS \
and min(point1_parent[1], point2_parent[1]) - GRAB_RADIUS <= y <= max(point1_parent[1], point2_parent[1]) + GRAB_RADIUS
def collide_grab_point(self, x, y):
point1_parent = self.to_parent(self.point1.center[0], self.point1.center[1])
point2_parent = self.to_parent(self.point2.center[0], self.point2.center[1])
return point1_parent[0] - GRAB_RADIUS <= x <= point1_parent[0] + GRAB_RADIUS and point1_parent[1] - GRAB_RADIUS <= y <= point1_parent[1] + GRAB_RADIUS \
or point2_parent[0] - GRAB_RADIUS <= x <= point2_parent[0] + GRAB_RADIUS and point2_parent[1] - GRAB_RADIUS <= y <= point2_parent[1] + GRAB_RADIUS
'''
####################################
##
## On Touch Down
##
####################################
'''
def on_touch_down(self, touch):
if self.parent.parent.app.sound['deflector_down'].status != 'play':
self.parent.parent.app.sound['deflector_down'].play()
return super(Deflector, self).on_touch_down(touch)
'''
####################################
##
## On Touch Up
##
####################################
'''
def on_touch_up(self, touch):
# if the deflector want's to be removed (touches too close to each other):
if self.length < MIN_DEFLECTOR_LENGTH and self.parent != None:
self.parent.delete_deflector(self)
return True
if self.parent != None and self.collide_grab_point(*touch.pos):
if self.parent.parent.app.sound['deflector_up'].status != 'play':
self.parent.parent.app.sound['deflector_up'].play()
return super(Deflector, self).on_touch_up(touch)