from PyQt5.QtCore import QMutex, QObject, QPointF, pyqtSignal, pyqtSlot
from PyQt5.QtChart import QAbstractSeries
from PyQt5.QtGui import QColor, QPixmap
from PyQt5.QtQuick import QQuickImageProvider

class GUI(QObject):
    webcam_status = pyqtSignal(bool, arguments=['connected'])
    webcam_refresh = pyqtSignal(QPixmap, arguments=['image'])
    webcam_connect = pyqtSignal(bool)

    def __init__(self):
        super(GUI, self).__init__()
        self.webcam_provider = WebcamProvider()

    def handle_connection_status(self, connected):
        self.webcam_status.emit(connected)

    def handle_image(self, image):
        self.webcam_provider.set_image(image)
        self.webcam_refresh.emit(image)

    @pyqtSlot(bool)
    def cmd_connect(self, connected):
        self.webcam_connect.emit(connected)

class WebcamProvider(QQuickImageProvider):
    def __init__(self):
        super(WebcamProvider, self).__init__(QQuickImageProvider.Pixmap)
        self.next_image = QPixmap(1280, 720)

    def requestPixmap(self, requested_id, requested_size):
        return self.next_image, self.next_image.size()

    def set_image(self, image):
        self.next_image = image