Exemple #1
0
class AddonManagerDialog(QDialog):
    _packages = None

    def __init__(self, parent=None, **kwargs):
        super().__init__(parent, **kwargs)
        self.setLayout(QVBoxLayout())
        self.layout().setContentsMargins(0, 0, 0, 0)

        self.addonwidget = AddonManagerWidget()
        self.layout().addWidget(self.addonwidget)
        buttons = QDialogButtonBox(orientation=Qt.Horizontal,
                                   standardButtons=QDialogButtonBox.Ok
                                   | QDialogButtonBox.Cancel)
        buttons.accepted.connect(self.__accepted)
        buttons.rejected.connect(self.reject)

        self.layout().addWidget(buttons)

        self._executor = concurrent.futures.ThreadPoolExecutor(max_workers=1)
        if AddonManagerDialog._packages is None:
            self._f_pypi_addons = self._executor.submit(list_pypi_addons)
        else:
            self._f_pypi_addons = concurrent.futures.Future()
            self._f_pypi_addons.set_result(AddonManagerDialog._packages)

        self._f_pypi_addons.add_done_callback(
            method_queued(self._set_packages, (object, )))

        self.__progress = QProgressDialog(
            self,
            Qt.Sheet,
            minimum=0,
            maximum=0,
            labelText=self.tr("Retrieving package list"),
            sizeGripEnabled=False,
        )

        self.__progress.rejected.connect(self.reject)
        self.__thread = None
        self.__installer = None

    @Slot(object)
    def _set_packages(self, f):
        if self.__progress.isVisible():
            self.__progress.close()

        try:
            packages = f.result()
        except (IOError, OSError) as err:
            message_warning("Could not retrieve package list",
                            title="Error",
                            informative_text=str(err),
                            parent=self)
            packages = []
        except Exception:
            raise
        else:
            AddonManagerDialog._packages = packages

        installed = list_installed_addons()
        dists = {dist.project_name: dist for dist in installed}
        packages = {pkg.name: pkg for pkg in packages}

        project_names = unique(itertools.chain(packages.keys(), dists.keys()))

        items = []
        for name in project_names:
            if name in dists and name in packages:
                item = Installed(packages[name], dists[name])
            elif name in dists:
                item = Installed(None, dists[name])
            elif name in packages:
                item = Available(packages[name])
            else:
                assert False
            items.append(item)

        self.addonwidget.set_items(items)

    def showEvent(self, event):
        super().showEvent(event)

        if not self._f_pypi_addons.done():
            QTimer.singleShot(0, self.__progress.show)

    def done(self, retcode):
        super().done(retcode)
        self._f_pypi_addons.cancel()
        self._executor.shutdown(wait=False)
        if self.__thread is not None:
            self.__thread.quit()
            self.__thread.wait(1000)

    def closeEvent(self, event):
        super().closeEvent(event)
        self._f_pypi_addons.cancel()
        self._executor.shutdown(wait=False)

        if self.__thread is not None:
            self.__thread.quit()
            self.__thread.wait(1000)

    def __accepted(self):
        steps = self.addonwidget.item_state()

        if steps:
            # Move all uninstall steps to the front
            steps = sorted(steps,
                           key=lambda step: 0 if step[0] == Uninstall else 1)
            self.__installer = Installer(steps=steps)
            self.__thread = QThread(self)
            self.__thread.start()

            self.__installer.moveToThread(self.__thread)
            self.__installer.finished.connect(self.__on_installer_finished)
            self.__installer.error.connect(self.__on_installer_error)
            self.__installer.installStatusChanged.connect(
                self.__progress.setLabelText)

            self.__progress.show()
            self.__progress.setLabelText("Installing")

            self.__installer.start()

        else:
            self.accept()

    def __on_installer_error(self, command, pkg, retcode, output):
        message_error(
            "An error occurred while running a subprocess",
            title="Error",
            informative_text="{} exited with non zero status.".format(command),
            details="".join(output),
            parent=self)
        self.reject()

    def __on_installer_finished(self):
        message_information(
            "Please restart the application for changes to take effect.",
            parent=self)
        self.accept()
Exemple #2
0
class AddonManagerDialog(QDialog):
    _packages = None

    def __init__(self, parent=None, **kwargs):
        super().__init__(parent, acceptDrops=True, **kwargs)
        self.setLayout(QVBoxLayout())
        self.layout().setContentsMargins(0, 0, 0, 0)

        self.addonwidget = AddonManagerWidget()
        self.layout().addWidget(self.addonwidget)

        info_bar = QWidget()
        info_layout = QHBoxLayout()
        info_bar.setLayout(info_layout)
        self.layout().addWidget(info_bar)

        buttons = QDialogButtonBox(orientation=Qt.Horizontal,
                                   standardButtons=QDialogButtonBox.Ok
                                   | QDialogButtonBox.Cancel)
        buttons.accepted.connect(self.__accepted)
        buttons.rejected.connect(self.reject)

        self.layout().addWidget(buttons)

        # No system access => install into user site-packages
        self.user_install = not os.access(sysconfig.get_path("purelib"),
                                          os.W_OK)

        self._executor = concurrent.futures.ThreadPoolExecutor(max_workers=1)
        if AddonManagerDialog._packages is None:
            self._f_pypi_addons = self._executor.submit(list_pypi_addons)
        else:
            self._f_pypi_addons = concurrent.futures.Future()
            self._f_pypi_addons.set_result(AddonManagerDialog._packages)

        self._f_pypi_addons.add_done_callback(
            method_queued(self._set_packages, (object, )))

        self.__progress = QProgressDialog(
            self,
            Qt.Sheet,
            minimum=0,
            maximum=0,
            labelText=self.tr("Retrieving package list"),
            sizeGripEnabled=False,
            windowTitle="Progress")

        self.__progress.rejected.connect(self.reject)
        self.__thread = None
        self.__installer = None

    @Slot(object)
    def _set_packages(self, f):
        if self.__progress.isVisible():
            self.__progress.close()

        try:
            packages = f.result()
        except (IOError, OSError) as err:
            message_warning("Could not retrieve package list",
                            title="Error",
                            informative_text=str(err),
                            parent=self)
            packages = []
        except Exception:
            raise
        else:
            AddonManagerDialog._packages = packages

        installed = list_installed_addons()
        dists = {dist.project_name: dist for dist in installed}
        packages = {pkg.name: pkg for pkg in packages}

        # For every pypi available distribution not listed by
        # list_installed_addons, check if it is actually already
        # installed.
        ws = pkg_resources.WorkingSet()
        for pkg_name in set(packages.keys()).difference(set(dists.keys())):
            try:
                d = ws.find(pkg_resources.Requirement.parse(pkg_name))
            except pkg_resources.VersionConflict:
                pass
            except ValueError:
                # Requirements.parse error ?
                pass
            else:
                if d is not None:
                    dists[d.project_name] = d

        project_names = unique(itertools.chain(packages.keys(), dists.keys()))

        items = []
        for name in project_names:
            if name in dists and name in packages:
                item = Installed(packages[name], dists[name])
            elif name in dists:
                item = Installed(None, dists[name])
            elif name in packages:
                item = Available(packages[name])
            else:
                assert False
            items.append(item)

        self.addonwidget.set_items(items)

    def showEvent(self, event):
        super().showEvent(event)

        if not self._f_pypi_addons.done():
            QTimer.singleShot(0, self.__progress.show)

    def done(self, retcode):
        super().done(retcode)
        self._f_pypi_addons.cancel()
        self._executor.shutdown(wait=False)
        if self.__thread is not None:
            self.__thread.quit()
            self.__thread.wait(1000)

    def closeEvent(self, event):
        super().closeEvent(event)
        self._f_pypi_addons.cancel()
        self._executor.shutdown(wait=False)

        if self.__thread is not None:
            self.__thread.quit()
            self.__thread.wait(1000)

    ADDON_EXTENSIONS = ('.zip', '.whl', '.tar.gz')

    def dragEnterEvent(self, event):
        urls = event.mimeData().urls()
        if any((OSX_NSURL_toLocalFile(url) or url.toLocalFile()
                ).endswith(self.ADDON_EXTENSIONS) for url in urls):
            event.acceptProposedAction()

    def dropEvent(self, event):
        """Allow dropping add-ons (zip or wheel archives) on this dialog to
        install them"""
        packages = []
        names = []
        for url in event.mimeData().urls():
            path = OSX_NSURL_toLocalFile(url) or url.toLocalFile()
            if path.endswith(self.ADDON_EXTENSIONS):
                name, vers, summary, descr = (get_meta_from_archive(path)
                                              or (os.path.basename(path), '',
                                                  '', ''))
                names.append(name)
                packages.append(
                    Installable(name, vers, summary, descr or summary, path,
                                [path]))
        future = concurrent.futures.Future()
        future.set_result((AddonManagerDialog._packages or []) + packages)
        self._set_packages(future)
        self.addonwidget.set_install_projects(names)

    def __accepted(self):
        steps = self.addonwidget.item_state()

        if steps:
            # Move all uninstall steps to the front
            steps = sorted(steps,
                           key=lambda step: 0 if step[0] == Uninstall else 1)
            self.__installer = Installer(steps=steps,
                                         user_install=self.user_install)
            self.__thread = QThread(self)
            self.__thread.start()

            self.__installer.moveToThread(self.__thread)
            self.__installer.finished.connect(self.__on_installer_finished)
            self.__installer.error.connect(self.__on_installer_error)
            self.__installer.installStatusChanged.connect(
                self.__progress.setLabelText)

            self.__progress.show()
            self.__progress.setLabelText("Installing")

            self.__installer.start()

        else:
            self.accept()

    def __on_installer_error(self, command, pkg, retcode, output):
        message_error(
            "An error occurred while running a subprocess",
            title="Error",
            informative_text="{} exited with non zero status.".format(command),
            details="".join(output),
            parent=self)
        self.reject()

    def __on_installer_finished(self):
        message = (
            ("Changes successfully applied in <i>{}</i>.<br>".format(USER_SITE)
             if self.user_install else '') +
            "Please restart Orange for changes to take effect.")
        message_information(message, parent=self)
        self.accept()
Exemple #3
0
class AddonManagerDialog(QDialog):
    _packages = None

    def __init__(self, parent=None, **kwargs):
        super().__init__(parent, acceptDrops=True, **kwargs)
        self.setLayout(QVBoxLayout())
        self.layout().setContentsMargins(0, 0, 0, 0)

        self.addonwidget = AddonManagerWidget()
        self.layout().addWidget(self.addonwidget)

        info_bar = QWidget()
        info_layout = QHBoxLayout()
        info_bar.setLayout(info_layout)
        self.layout().addWidget(info_bar)

        buttons = QDialogButtonBox(
            orientation=Qt.Horizontal,
            standardButtons=QDialogButtonBox.Ok | QDialogButtonBox.Cancel
        )
        buttons.accepted.connect(self.__accepted)
        buttons.rejected.connect(self.reject)

        self.layout().addWidget(buttons)

        # No system access => install into user site-packages
        self.user_install = not os.access(sysconfig.get_path("purelib"),
                                          os.W_OK)

        self._executor = concurrent.futures.ThreadPoolExecutor(max_workers=1)
        if AddonManagerDialog._packages is None:
            self._f_pypi_addons = self._executor.submit(list_pypi_addons)
        else:
            self._f_pypi_addons = concurrent.futures.Future()
            self._f_pypi_addons.set_result(AddonManagerDialog._packages)

        self._f_pypi_addons.add_done_callback(
            method_queued(self._set_packages, (object,))
        )

        self.__progress = QProgressDialog(
            self, Qt.Sheet,
            minimum=0, maximum=0,
            labelText=self.tr("Retrieving package list"),
            sizeGripEnabled=False,
            windowTitle="Progress"
        )

        self.__progress.rejected.connect(self.reject)
        self.__thread = None
        self.__installer = None

    @Slot(object)
    def _set_packages(self, f):
        if self.__progress.isVisible():
            self.__progress.close()

        try:
            packages = f.result()
        except (IOError, OSError) as err:
            message_warning(
                "Could not retrieve package list",
                title="Error",
                informative_text=str(err),
                parent=self
            )
            packages = []
        except Exception:
            raise
        else:
            AddonManagerDialog._packages = packages

        installed = list_installed_addons()
        dists = {dist.project_name: dist for dist in installed}
        packages = {pkg.name: pkg for pkg in packages}

        # For every pypi available distribution not listed by
        # list_installed_addons, check if it is actually already
        # installed.
        ws = pkg_resources.WorkingSet()
        for pkg_name in set(packages.keys()).difference(set(dists.keys())):
            try:
                d = ws.find(pkg_resources.Requirement.parse(pkg_name))
            except pkg_resources.VersionConflict:
                pass
            except ValueError:
                # Requirements.parse error ?
                pass
            else:
                if d is not None:
                    dists[d.project_name] = d

        project_names = unique(
            itertools.chain(packages.keys(), dists.keys())
        )

        items = []
        for name in project_names:
            if name in dists and name in packages:
                item = Installed(packages[name], dists[name])
            elif name in dists:
                item = Installed(None, dists[name])
            elif name in packages:
                item = Available(packages[name])
            else:
                assert False
            items.append(item)

        self.addonwidget.set_items(items)

    def showEvent(self, event):
        super().showEvent(event)

        if not self._f_pypi_addons.done():
            QTimer.singleShot(0, self.__progress.show)

    def done(self, retcode):
        super().done(retcode)
        self._f_pypi_addons.cancel()
        self._executor.shutdown(wait=False)
        if self.__thread is not None:
            self.__thread.quit()
            self.__thread.wait(1000)

    def closeEvent(self, event):
        super().closeEvent(event)
        self._f_pypi_addons.cancel()
        self._executor.shutdown(wait=False)

        if self.__thread is not None:
            self.__thread.quit()
            self.__thread.wait(1000)

    ADDON_EXTENSIONS = ('.zip', '.whl', '.tar.gz')

    def dragEnterEvent(self, event):
        urls = event.mimeData().urls()
        if any((OSX_NSURL_toLocalFile(url) or url.toLocalFile())
                .endswith(self.ADDON_EXTENSIONS) for url in urls):
            event.acceptProposedAction()

    def dropEvent(self, event):
        """Allow dropping add-ons (zip or wheel archives) on this dialog to
        install them"""
        packages = []
        names = []
        for url in event.mimeData().urls():
            path = OSX_NSURL_toLocalFile(url) or url.toLocalFile()
            if path.endswith(self.ADDON_EXTENSIONS):
                name, vers, summary, descr = (get_meta_from_archive(path) or
                                              (os.path.basename(path), '', '', ''))
                names.append(name)
                packages.append(
                    Installable(name, vers, summary,
                                descr or summary, path, [path]))
        future = concurrent.futures.Future()
        future.set_result((AddonManagerDialog._packages or []) + packages)
        self._set_packages(future)
        self.addonwidget.set_install_projects(names)

    def __accepted(self):
        steps = self.addonwidget.item_state()

        if steps:
            # Move all uninstall steps to the front
            steps = sorted(
                steps, key=lambda step: 0 if step[0] == Uninstall else 1
            )
            self.__installer = Installer(steps=steps,
                                         user_install=self.user_install)
            self.__thread = QThread(self)
            self.__thread.start()

            self.__installer.moveToThread(self.__thread)
            self.__installer.finished.connect(self.__on_installer_finished)
            self.__installer.error.connect(self.__on_installer_error)
            self.__installer.installStatusChanged.connect(
                self.__progress.setLabelText)

            self.__progress.show()
            self.__progress.setLabelText("Installing")

            self.__installer.start()

        else:
            self.accept()

    def __on_installer_error(self, command, pkg, retcode, output):
        message_error(
            "An error occurred while running a subprocess", title="Error",
            informative_text="{} exited with non zero status.".format(command),
            details="".join(output),
            parent=self
        )
        self.reject()

    def __on_installer_finished(self):
        message = (
            ("Changes successfully applied in <i>{}</i>.<br>".format(
                USER_SITE) if self.user_install else '') +
            "Please restart Orange for changes to take effect.")
        message_information(message, parent=self)
        self.accept()
Exemple #4
0
class AddonManagerDialog(QDialog):
    _packages = None

    def __init__(self, parent=None, **kwargs):
        super().__init__(parent, **kwargs)
        self.setLayout(QVBoxLayout())
        self.layout().setContentsMargins(0, 0, 0, 0)

        self.addonwidget = AddonManagerWidget()
        self.layout().addWidget(self.addonwidget)
        buttons = QDialogButtonBox(
            orientation=Qt.Horizontal,
            standardButtons=QDialogButtonBox.Ok | QDialogButtonBox.Cancel
        )
        buttons.accepted.connect(self.__accepted)
        buttons.rejected.connect(self.reject)

        self.layout().addWidget(buttons)

        self._executor = concurrent.futures.ThreadPoolExecutor(max_workers=1)
        if AddonManagerDialog._packages is None:
            self._f_pypi_addons = self._executor.submit(list_pypi_addons)
        else:
            self._f_pypi_addons = concurrent.futures.Future()
            self._f_pypi_addons.set_result(AddonManagerDialog._packages)

        self._f_pypi_addons.add_done_callback(
            method_queued(self._set_packages, (object,))
        )

        self.__progress = QProgressDialog(
            self, Qt.Sheet,
            minimum=0, maximum=0,
            labelText=self.tr("Retrieving package list"),
            sizeGripEnabled=False,
        )

        self.__progress.rejected.connect(self.reject)
        self.__thread = None
        self.__installer = None

    @Slot(object)
    def _set_packages(self, f):
        if self.__progress.isVisible():
            self.__progress.close()

        try:
            packages = f.result()
        except (IOError, OSError) as err:
            message_warning(
                "Could not retrieve package list",
                title="Error",
                informative_text=str(err),
                parent=self
            )
            packages = []
        except Exception:
            raise
        else:
            AddonManagerDialog._packages = packages

        installed = list_installed_addons()
        dists = {dist.project_name: dist for dist in installed}
        packages = {pkg.name: pkg for pkg in packages}

        project_names = unique(
            itertools.chain(packages.keys(), dists.keys())
        )

        items = []
        for name in project_names:
            if name in dists and name in packages:
                item = Installed(packages[name], dists[name])
            elif name in dists:
                item = Installed(None, dists[name])
            elif name in packages:
                item = Available(packages[name])
            else:
                assert False
            items.append(item)

        self.addonwidget.set_items(items)

    def showEvent(self, event):
        super().showEvent(event)

        if not self._f_pypi_addons.done():
            QTimer.singleShot(0, self.__progress.show)

    def done(self, retcode):
        super().done(retcode)
        self._f_pypi_addons.cancel()
        self._executor.shutdown(wait=False)
        if self.__thread is not None:
            self.__thread.quit()
            self.__thread.wait(1000)

    def closeEvent(self, event):
        super().closeEvent(event)
        self._f_pypi_addons.cancel()
        self._executor.shutdown(wait=False)

        if self.__thread is not None:
            self.__thread.quit()
            self.__thread.wait(1000)

    def __accepted(self):
        steps = self.addonwidget.item_state()

        if steps:
            # Move all uninstall steps to the front
            steps = sorted(
                steps, key=lambda step: 0 if step[0] == Uninstall else 1
            )
            self.__installer = Installer(steps=steps)
            self.__thread = QThread(self)
            self.__thread.start()

            self.__installer.moveToThread(self.__thread)
            self.__installer.finished.connect(self.__on_installer_finished)
            self.__installer.error.connect(self.__on_installer_error)
            self.__installer.installStatusChanged.connect(
                self.__progress.setLabelText)

            self.__progress.show()
            self.__progress.setLabelText("Installing")

            self.__installer.start()

        else:
            self.accept()

    def __on_installer_error(self, command, pkg, retcode, output):
        message_error(
            "An error occurred while running a subprocess", title="Error",
            informative_text="{} exited with non zero status.".format(command),
            details="".join(output),
            parent=self
        )
        self.reject()

    def __on_installer_finished(self):
        message_information(
            "Please restart the application for changes to take effect.",
            parent=self)
        self.accept()
Exemple #5
0
class AddonManagerDialog(QDialog):
    _packages = None

    def __init__(self, parent=None, **kwargs):
        super().__init__(parent, **kwargs)
        self.setLayout(QVBoxLayout())
        self.layout().setContentsMargins(0, 0, 0, 0)

        self.addonwidget = AddonManagerWidget()
        self.layout().addWidget(self.addonwidget)

        info_bar = QWidget()
        info_layout = QHBoxLayout()
        info_bar.setLayout(info_layout)
        info_icon = QLabel()
        info_text = QLabel()
        info_layout.addWidget(info_icon)
        info_layout.addWidget(info_text)
        self.layout().addWidget(info_bar)

        buttons = QDialogButtonBox(
            orientation=Qt.Horizontal,
            standardButtons=QDialogButtonBox.Ok | QDialogButtonBox.Cancel
        )
        buttons.accepted.connect(self.__accepted)
        buttons.rejected.connect(self.reject)

        self.layout().addWidget(buttons)

        if not os.access(sysconfig.get_path("purelib"), os.W_OK):
            if sysconfig.get_platform().startswith("macosx"):
                info = "You must install Orange by dragging it into" \
                       " Applications before installing add-ons."
            else:
                info = "You do not have permissions to write into Orange " \
                       "directory.\nYou may need to contact an administrator " \
                       "for assistance."
            info_text.setText(info)
            style = QApplication.instance().style()
            info_icon.setPixmap(style.standardIcon(
                QStyle.SP_MessageBoxCritical).pixmap(14, 14))
            buttons.button(QDialogButtonBox.Ok ).setEnabled(False)

        self._executor = concurrent.futures.ThreadPoolExecutor(max_workers=1)
        if AddonManagerDialog._packages is None:
            self._f_pypi_addons = self._executor.submit(list_pypi_addons)
        else:
            self._f_pypi_addons = concurrent.futures.Future()
            self._f_pypi_addons.set_result(AddonManagerDialog._packages)

        self._f_pypi_addons.add_done_callback(
            method_queued(self._set_packages, (object,))
        )

        self.__progress = QProgressDialog(
            self, Qt.Sheet,
            minimum=0, maximum=0,
            labelText=self.tr("Retrieving package list"),
            sizeGripEnabled=False,
            windowTitle="Progress"
        )

        self.__progress.rejected.connect(self.reject)
        self.__thread = None
        self.__installer = None

    @Slot(object)
    def _set_packages(self, f):
        if self.__progress.isVisible():
            self.__progress.close()

        try:
            packages = f.result()
        except (IOError, OSError) as err:
            message_warning(
                "Could not retrieve package list",
                title="Error",
                informative_text=str(err),
                parent=self
            )
            packages = []
        except Exception:
            raise
        else:
            AddonManagerDialog._packages = packages

        installed = list_installed_addons()
        dists = {dist.project_name: dist for dist in installed}
        packages = {pkg.name: pkg for pkg in packages}

        # For every pypi available distribution not listed by
        # list_installed_addons, check if it is actually already
        # installed.
        ws = pkg_resources.WorkingSet()
        for pkg_name in set(packages.keys()).difference(set(dists.keys())):
            try:
                d = ws.find(pkg_resources.Requirement.parse(pkg_name))
            except pkg_resources.VersionConflict:
                pass
            except ValueError:
                # Requirements.parse error ?
                pass
            else:
                if d is not None:
                    dists[d.project_name] = d

        project_names = unique(
            itertools.chain(packages.keys(), dists.keys())
        )

        items = []
        for name in project_names:
            if name in dists and name in packages:
                item = Installed(packages[name], dists[name])
            elif name in dists:
                item = Installed(None, dists[name])
            elif name in packages:
                item = Available(packages[name])
            else:
                assert False
            items.append(item)

        self.addonwidget.set_items(items)

    def showEvent(self, event):
        super().showEvent(event)

        if not self._f_pypi_addons.done():
            QTimer.singleShot(0, self.__progress.show)

    def done(self, retcode):
        super().done(retcode)
        self._f_pypi_addons.cancel()
        self._executor.shutdown(wait=False)
        if self.__thread is not None:
            self.__thread.quit()
            self.__thread.wait(1000)

    def closeEvent(self, event):
        super().closeEvent(event)
        self._f_pypi_addons.cancel()
        self._executor.shutdown(wait=False)

        if self.__thread is not None:
            self.__thread.quit()
            self.__thread.wait(1000)

    def __accepted(self):
        steps = self.addonwidget.item_state()

        if steps:
            # Move all uninstall steps to the front
            steps = sorted(
                steps, key=lambda step: 0 if step[0] == Uninstall else 1
            )
            self.__installer = Installer(steps=steps)
            self.__thread = QThread(self)
            self.__thread.start()

            self.__installer.moveToThread(self.__thread)
            self.__installer.finished.connect(self.__on_installer_finished)
            self.__installer.error.connect(self.__on_installer_error)
            self.__installer.installStatusChanged.connect(
                self.__progress.setLabelText)

            self.__progress.show()
            self.__progress.setLabelText("Installing")

            self.__installer.start()

        else:
            self.accept()

    def __on_installer_error(self, command, pkg, retcode, output):
        message_error(
            "An error occurred while running a subprocess", title="Error",
            informative_text="{} exited with non zero status.".format(command),
            details="".join(output),
            parent=self
        )
        self.reject()

    def __on_installer_finished(self):
        message_information(
            "Please restart Orange for changes to take effect.",
            parent=self)
        self.accept()