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kivy_util.py
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kivy_util.py
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from kivy.uix.label import Label
from kivy.uix.scrollview import ScrollView
from kivy.graphics import Rectangle
from kivy.graphics import Color
from kivy.graphics import InstructionGroup
from kivy.graphics import Line
from kivy.utils import get_color_from_hex
from kivy.uix.button import Button
from data_grid import DataGrid
from math import atan2, sin, cos
import subprocess
def run_command(command):
p = subprocess.Popen(command, shell=True,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
return iter(p.stdout.readline, b'')
# return p.communicate()
def which(program):
import os
def is_exe(fpath):
return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
fpath, fname = os.path.split(program)
if fpath:
if is_exe(program):
return program
else:
for path in os.environ["PATH"].split(os.pathsep):
path = path.strip('"')
exe_file = os.path.join(path, program)
if is_exe(exe_file):
return exe_file
return None
class Arrow(InstructionGroup):
def __init__(self, points, line_width = 1, head_length = 8, **kwargs):
super(Arrow, self).__init__(**kwargs)
Line(points=points, width=line_width)
for p in self.get_head_line_points(points, head_length):
Line(points=p, width=line_width)
@staticmethod
def get_head_line_points(points, head_length):
xd = points[0] - points[2]
yd = points[1] - points[3]
t = atan2(yd, xd)
# return the angle between point2 and point1 with a variance of 30 degrees on each side
head_angles = (t-0.5, t+0.5)
for th in head_angles:
yield [points[2], points[3], points[2] + head_length * cos(th), points[3] + head_length * sin(th)]
class ScrollableLabel(ScrollView):
def __init__(self, text, ref_callback=None, font_size=13, font_name='DroidSans', *args, **kwargs):
super(ScrollableLabel, self).__init__(*args, **kwargs)
with self.canvas.before:
Color(*get_color_from_hex('#ffffef'), mode='rgba')
self.background = Rectangle(size_hint=(1,1))
self.label = Label(text=text, font_size=font_size, font_name=font_name,
size_hint_y=None, pos_hint={'x': 0.1, 'y': 0.1})
self.label.bind(texture_size=self._set_summary_height, on_ref_press=ref_callback)
self.label.markup=True
self.add_widget(self.label)
self.bind(pos=self.change_position)
self.bind(size=self.change_size)
def _set_summary_height(self, instance, size):
instance.height = size[1]
def change_position(self, instance, position):
self.background.pos = position
def change_size(self, instance, size):
self.background.size = size
self.label.text_size = (size[0]-50, None)
class BlueButton(Button):
def __init__(self, *args, **kwargs):
super(Button, self).__init__(*args, **kwargs)
self.background_down = 'img/background_pressed.png'
self.background_normal = 'img/background_header.png'
class ScrollableGrid(ScrollView):
def __init__(self, table_header, footer, editable, top_level_header=None, callback=None, *args, **kwargs):
super(ScrollableGrid, self).__init__(**kwargs)
with self.canvas.before:
if not kwargs.has_key('no_color'):
Color(*get_color_from_hex('#ffffe0'), mode='rgba')
self.background = Rectangle(size_hint=(1,1))
self.table_header = table_header
self.top_level_header = top_level_header
self.callback = callback
self.grid = DataGrid(table_header, [], '', '', top_level_header=top_level_header, callback=callback)
self.do_scroll_y = True
self.do_scroll_x = False
self.add_widget(self.grid)
self.bind(pos=self.change_position)
self.bind(size=self.change_size)
def _set_summary_height(self, instance, size):
instance.height = size[1]
def change_position(self, instance, position):
self.background.pos = position
def change_size(self, instance, size):
self.background.size = size
self.grid.text_size = (size[0]-50, None)
def reset_grid(self):
self.remove_widget(self.grid)
# self.grid.clear_widgets(children=None)
# self.grid.process_header(self.callback, self.table_header, self.top_level_header)
self.grid = DataGrid(self.table_header, [], '', '', top_level_header=self.top_level_header, callback = self.callback)
self.add_widget(self.grid)