105 lines
3.2 KiB
Python
105 lines
3.2 KiB
Python
# pylint: disable=import-error, no-name-in-module, import-outside-toplevel
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# pylint: disable=no-member, attribute-defined-outside-init, arguments-differ
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"""
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Kivy QR Scan screen
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"""
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import os
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from kivy.clock import Clock
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from kivy.lang import Builder
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from kivy.properties import (
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BooleanProperty,
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ObjectProperty,
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StringProperty
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)
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from kivy.uix.screenmanager import Screen
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from pybitmessage.get_platform import platform
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class ScanScreen(Screen):
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"""ScanScreen is for scaning Qr code"""
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# pylint: disable=unused-argument
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# pylint: disable=W0212
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camera_avaialbe = BooleanProperty(False)
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previous_open_screen = StringProperty()
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pop_up_instance = ObjectProperty()
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def __init__(self, *args, **kwargs):
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"""Getting AddressBook Details"""
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super(ScanScreen, self).__init__(*args, **kwargs)
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self.check_camera()
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def check_camera(self):
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"""This method is used for checking camera avaibility"""
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if platform != "android":
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import cv2
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cap = cv2.VideoCapture(0)
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while cap.isOpened():
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print('Camera is available!')
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self.camera_avaialbe = True
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break
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else:
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print("Camera is not available!")
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self.camera_avaialbe = False
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else:
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self.camera_avaialbe = True
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def get_screen(self, screen_name, instance=None):
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"""This method is used for getting previous screen name"""
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self.previous_open_screen = screen_name
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if screen_name != 'composer':
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self.pop_up_instance = instance
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def on_pre_enter(self):
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"""
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on_pre_enter works little better on android
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It affects screen transition on linux
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"""
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if not self.children:
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tmp = Builder.load_file(
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os.path.join(
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os.path.dirname(os.path.dirname(__file__)), "kv/{}.kv").format("scanner")
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)
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self.add_widget(tmp)
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if platform == "android":
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Clock.schedule_once(self.start_camera, 0)
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def on_enter(self):
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"""
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on_enter works better on linux
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It creates a black screen on android until camera gets loaded
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"""
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# print(self.children)
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if platform != "android":
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# pass
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Clock.schedule_once(self.start_camera, 0)
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def on_leave(self):
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"""this methos will call on leave"""
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# pass
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Clock.schedule_once(self.stop_camera, 0)
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def start_camera(self, *args):
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"""Its used for starting camera for scanning qrcode"""
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self.xcam = self.children[0].ids.zbarcam.ids.xcamera
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if platform == "android":
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self.xcam.play = True
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else:
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Clock.schedule_once(self.open_cam, 0)
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def stop_camera(self, *args):
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"""Its used for stop the camera"""
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self.xcam.play = False
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if platform != "android":
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self.xcam._camera._device.release()
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def open_cam(self, *args):
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"""It will open up the camera"""
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if not self.xcam._camera._device.isOpened():
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self.xcam._camera._device.open(self.xcam._camera._index)
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self.xcam.play = True
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