Cura/cura/MachineAction.py

# Copyright (c) 2016 Ultimaker B.V.
# Cura is released under the terms of the AGPLv3 or higher.

from PyQt5.QtCore import QObject, pyqtSlot, pyqtProperty, pyqtSignal, QUrl
from PyQt5.QtQml import QQmlComponent, QQmlContext

from UM.PluginObject import PluginObject
from UM.PluginRegistry import PluginRegistry

from UM.Application import Application

import os


class MachineAction(QObject, PluginObject):
    def __init__(self, key, label = ""):
        super().__init__()
        self._key = key
        self._label = label
        self._qml_url = "" 

        self._component = None
        self._context = None
        self._view = None

    labelChanged = pyqtSignal()

    def getKey(self):
        return self._key

    @pyqtProperty(str, notify = labelChanged)
    def label(self):
        return self._label

    def setLabel(self, label):
        if self._label != label:
            self._label = label
            self.labelChanged.emit()

    @pyqtSlot()
    def execute(self):
        self._execute()

    def _execute(self):
        raise NotImplementedError("Execute() must be implemented")

    def _createViewFromQML(self):
        path = QUrl.fromLocalFile(
            os.path.join(PluginRegistry.getInstance().getPluginPath(self.getPluginId()), self._qml_url))
        self._component = QQmlComponent(Application.getInstance()._engine, path)
        self._context = QQmlContext(Application.getInstance()._engine.rootContext())
        self._context.setContextProperty("manager", self)
        self._view = self._component.create(self._context)

    @pyqtProperty(QObject, constant = True)
    def displayItem(self):
        if not self._component:
            self._createViewFromQML()

        return self._view