Python OWConcurrent.Task类代码示例

    def commit(self):
        if self.currentGds:
            self.error(0)
            sample_type = None
            self.progressBarInit()
            self.progressBarSet(10)

            _, groups = self.selectedSamples()
            if len(groups) == 1 and self.outputRows:
                sample_type = groups[0]

            self.setEnabled(False)
            self.setBlocking(True)

            def get_data(gds_id, report_genes, transpose, sample_type, title):
                gds = geo.GDS(gds_id)
                data = gds.getdata(
                    report_genes=report_genes, transpose=transpose,
                    sample_type=sample_type
                )
                data.name = title
                return data

            get_data = partial(
                get_data, self.currentGds["dataset_id"],
                report_genes=self.mergeSpots,
                transpose=self.outputRows,
                sample_type=sample_type,
                title=self.datasetName or self.currentGds["title"]
            )
            self._datatask = Task(function=get_data)
            self._datatask.finished.connect(self._on_dataready)
            self._executor.submit(self._datatask)

    def UpdatePathwayView(self):
        items = self.listView.selectedItems()

        if len(items) > 0:
            item = items[0]
        else:
            item = None

        self.Commit()
        item = item or self.bestPValueItem
        if not item or not item.pathway_id:
            self.pathwayView.SetPathway(None)
            return

        def get_kgml_and_image(pathway_id):
            """Return an initialized KEGGPathway with pre-cached data"""
            p = kegg.KEGGPathway(pathway_id)
            p._get_kgml()  # makes sure the kgml file is downloaded
            p._get_image_filename()  # makes sure the image is downloaded
            return (pathway_id, p)

        self.setEnabled(False)
        self._pathwayTask = Task(
            function=lambda: get_kgml_and_image(item.pathway_id)
        )
        self._pathwayTask.finished.connect(self._onPathwayTaskFinshed)
        self._executor.submit(self._pathwayTask)

    def commit(self):
        include_neighborhood = self.include_neighborhood
        query_genes = self.query_genes()
        source = SOURCES[self.network_source]
        if source.score_filter:
            min_score = self.min_score
            assert source.name == "STRING"
            min_score = min_score * 1000
        else:
            min_score = None

        taxid = self.taxid
        progress = methodinvoke(self, "advance")
        if self.geneinfo is None:
            self.geneinfo = self.executor.submit(
                fetch_ncbi_geneinfo, taxid, progress
            )

        geneinfo_f = self.geneinfo
        taxmap = source.tax_mapping
        db_taxid = taxmap.get(taxid, taxid)

        if db_taxid is None:
            raise ValueError("invalid taxid for this network")

        def fetch_network():
            geneinfo = geneinfo_f.result()
            ppidb = fetch_ppidb(source, db_taxid, progress)
            return get_gene_network(ppidb, geneinfo, db_taxid, query_genes,
                                    include_neighborhood=include_neighborhood,
                                    min_score=min_score,
                                    progress=methodinvoke(self, "set_progress", (float,)))

        self.nettask = Task(function=fetch_network)
        self.nettask.finished.connect(self._on_result_ready)

        self.executor.submit(self.nettask)

        self.setBlocking(True)
        self.setEnabled(False)
        self.progressBarInit()
        self._invalidated = False
        self._update_info()

 def __init__(self, domain, filename, serverfiles, parent=None):
     Task.__init__(self, parent)
     self.filename = filename
     self.domain = domain
     self.serverfiles = serverfiles
     self._interrupt = False

#.........这里部分代码省略.........
        )

        box = OWGUI.widgetBox(self.controlArea, "Output", addSpace=True)
        OWGUI.radioButtonsInBox(box, self, "outputRows",
                                ["Genes or spots", "Samples"], "Rows",
                                callback=self.commitIf)
        OWGUI.checkBox(box, self, "mergeSpots", "Merge spots of same gene",
                       callback=self.commitIf)

        OWGUI.separator(box)
        self.nameEdit = OWGUI.lineEdit(
            box, self, "datasetName", "Data set name",
            tooltip="Override the default output data set name",
            callback=self.onNameEdited
        )
        self.nameEdit.setPlaceholderText("")

        box = OWGUI.widgetBox(self.controlArea, "Commit", addSpace=True)
        self.commitButton = OWGUI.button(box, self, "Commit",
                                         callback=self.commit)
        cb = OWGUI.checkBox(box, self, "autoCommit", "Commit on any change")
        OWGUI.setStopper(self, self.commitButton, cb, "selectionChanged",
                         self.commit)
        OWGUI.rubber(self.controlArea)

        self.filterLineEdit = OWGUIEx.lineEditHint(
            self.mainArea, self, "filterString", "Filter",
            caseSensitive=False, matchAnywhere=True,
            callback=self.filter,  delimiters=" ")

        splitter = QSplitter(Qt.Vertical, self.mainArea)
        self.mainArea.layout().addWidget(splitter)
        self.treeWidget = QTreeView(splitter)

        self.treeWidget.setSelectionMode(QAbstractItemView.SingleSelection)
        self.treeWidget.setRootIsDecorated(False)
        self.treeWidget.setSortingEnabled(True)
        self.treeWidget.setAlternatingRowColors(True)
        self.treeWidget.setUniformRowHeights(True)
        self.treeWidget.setEditTriggers(QTreeView.NoEditTriggers)

        linkdelegate = LinkStyledItemDelegate(self.treeWidget)
        self.treeWidget.setItemDelegateForColumn(1, linkdelegate)
        self.treeWidget.setItemDelegateForColumn(8, linkdelegate)
        self.treeWidget.setItemDelegateForColumn(
            0, OWGUI.IndicatorItemDelegate(self.treeWidget,
                                           role=Qt.DisplayRole))

        proxyModel = MySortFilterProxyModel(self.treeWidget)
        self.treeWidget.setModel(proxyModel)
        self.treeWidget.selectionModel().selectionChanged.connect(
            self.updateSelection
        )
        self.treeWidget.viewport().setMouseTracking(True)

        splitterH = QSplitter(Qt.Horizontal, splitter)

        box = OWGUI.widgetBox(splitterH, "Description")
        self.infoGDS = OWGUI.widgetLabel(box, "")
        self.infoGDS.setWordWrap(True)
        OWGUI.rubber(box)

        box = OWGUI.widgetBox(splitterH, "Sample Annotations")
        self.annotationsTree = QTreeWidget(box)
        self.annotationsTree.setHeaderLabels(
            ["Type (Sample annotations)", "Sample count"]
        )
        self.annotationsTree.setRootIsDecorated(True)
        box.layout().addWidget(self.annotationsTree)
        self.annotationsTree.itemChanged.connect(
            self.annotationSelectionChanged
        )
        self._annotationsUpdating = False
        self.splitters = splitter, splitterH

        for sp, setting in zip(self.splitters, self.splitterSettings):
            sp.splitterMoved.connect(self.splitterMoved)
            sp.restoreState(setting)

        self.searchKeys = ["dataset_id", "title", "platform_organism",
                           "description"]

        self.gds = []
        self.gds_info = None

        self.resize(1000, 600)

        self.setBlocking(True)
        self.setEnabled(False)
        self.progressBarInit()

        self._executor = ThreadExecutor()

        func = partial(get_gds_model,
                       methodinvoke(self, "_setProgress", (float,)))
        self._inittask = Task(function=func)
        self._inittask.finished.connect(self._initializemodel)
        self._executor.submit(self._inittask)

        self._datatask = None

#.........这里部分代码省略.........
        box = OWGUI.widgetBox(splitterH, "Sample Annotations")
        self.annotationsTree = QTreeWidget(box)
        self.annotationsTree.setHeaderLabels(
            ["Type (Sample annotations)", "Sample count"]
        )
        self.annotationsTree.setRootIsDecorated(True)
        box.layout().addWidget(self.annotationsTree)
        self.annotationsTree.itemChanged.connect(
            self.annotationSelectionChanged
        )
        self._annotationsUpdating = False
        self.splitters = splitter, splitterH

        for sp, setting in zip(self.splitters, self.splitterSettings):
            sp.splitterMoved.connect(self.splitterMoved)
            sp.restoreState(setting)

        self.searchKeys = ["dataset_id", "title", "platform_organism",
                           "description"]

        self.gds = []
        self.gds_info = None

        self.resize(1000, 600)

        self.setBlocking(True)
        self.setEnabled(False)
        self.progressBarInit()

        self._executor = ThreadExecutor()

        func = partial(get_gds_model,
                       methodinvoke(self, "_setProgress", (float,)))
        self._inittask = Task(function=func)
        self._inittask.finished.connect(self._initializemodel)
        self._executor.submit(self._inittask)

        self._datatask = None

    @pyqtSlot(float)
    def _setProgress(self, value):
        self.progressBarValue = value

    def _initializemodel(self):
        assert self.thread() is QThread.currentThread()
        model, self.gds_info, self.gds = self._inittask.result()
        model.setParent(self)

        proxy = self.treeWidget.model()
        proxy.setFilterKeyColumn(0)
        proxy.setFilterRole(TextFilterRole)
        proxy.setFilterCaseSensitivity(False)
        proxy.setFilterFixedString(self.filterString)

        proxy.setSourceModel(model)
        proxy.sort(0, Qt.DescendingOrder)

        self.progressBarFinished()
        self.setBlocking(False)
        self.setEnabled(True)

        filter_items = " ".join(
            gds[key] for gds in self.gds for key in self.searchKeys
        )
        tr_chars = ",.:;!?(){}[]_-+\\|/%#@$^&*<>~`"
        tr_table = string.maketrans(tr_chars, " " * len(tr_chars))

 def __init__(self, files_list, parent=None):
     Task.__init__(self, parent)
     self.files_list = files_list

#.........这里部分代码省略.........
            tooltip="Override the default output data set name",
            callback=self.onNameEdited
        )
        self.nameEdit.setPlaceholderText("")

        if sys.version_info < (3, ):
            box = gui.widgetBox(self.controlArea, "Commit", addSpace=True)
            self.commitButton = gui.button(
                box, self, "Commit", callback=self.commit)
            cb = gui.checkBox(box, self, "autoCommit", "Commit on any change")
            gui.setStopper(self, self.commitButton, cb, "selectionChanged",
                           self.commit)
        else:
            gui.auto_commit(self.controlArea, self, "autoCommit", "Commit",
                            box="Commit")
            self.commitIf = self.commit

        gui.rubber(self.controlArea)

        gui.widgetLabel(self.mainArea, "Filter")
        self.filterLineEdit = QLineEdit(
            textChanged=self.filter
        )
        self.completer = TokenListCompleter(
            self, caseSensitivity=Qt.CaseInsensitive
        )
        self.filterLineEdit.setCompleter(self.completer)

        self.mainArea.layout().addWidget(self.filterLineEdit)

        splitter = QSplitter(Qt.Vertical, self.mainArea)
        self.mainArea.layout().addWidget(splitter)
        self.treeWidget = QTreeView(splitter)

        self.treeWidget.setSelectionMode(QTreeView.SingleSelection)
        self.treeWidget.setRootIsDecorated(False)
        self.treeWidget.setSortingEnabled(True)
        self.treeWidget.setAlternatingRowColors(True)
        self.treeWidget.setUniformRowHeights(True)
        self.treeWidget.setEditTriggers(QTreeView.NoEditTriggers)

        linkdelegate = LinkStyledItemDelegate(self.treeWidget)
        self.treeWidget.setItemDelegateForColumn(1, linkdelegate)
        self.treeWidget.setItemDelegateForColumn(8, linkdelegate)
        self.treeWidget.setItemDelegateForColumn(
            0, gui.IndicatorItemDelegate(self.treeWidget,
                                         role=Qt.DisplayRole))

        proxyModel = MySortFilterProxyModel(self.treeWidget)
        self.treeWidget.setModel(proxyModel)
        self.treeWidget.selectionModel().selectionChanged.connect(
            self.updateSelection
        )
        self.treeWidget.viewport().setMouseTracking(True)

        splitterH = QSplitter(Qt.Horizontal, splitter)

        box = gui.widgetBox(splitterH, "Description")
        self.infoGDS = gui.widgetLabel(box, "")
        self.infoGDS.setWordWrap(True)
        gui.rubber(box)

        box = gui.widgetBox(splitterH, "Sample Annotations")
        self.annotationsTree = QTreeWidget(box)
        self.annotationsTree.setHeaderLabels(
            ["Type (Sample annotations)", "Sample count"]
        )
        self.annotationsTree.setRootIsDecorated(True)
        box.layout().addWidget(self.annotationsTree)
        self.annotationsTree.itemChanged.connect(
            self.annotationSelectionChanged
        )
        self._annotationsUpdating = False
        self.splitters = splitter, splitterH

        for sp, setting in zip(self.splitters, self.splitterSettings):
            sp.splitterMoved.connect(self.splitterMoved)
            sp.restoreState(setting)

        self.searchKeys = ["dataset_id", "title", "platform_organism",
                           "description"]

        self.gds = []
        self.gds_info = None

        self.resize(1000, 600)

        self.setBlocking(True)
        self.setEnabled(False)
        self.progressBarInit()

        self._executor = ThreadExecutor()

        func = partial(get_gds_model,
                       methodinvoke(self, "_setProgress", (float,)))
        self._inittask = Task(function=func)
        self._inittask.finished.connect(self._initializemodel)
        self._executor.submit(self._inittask)

        self._datatask = None

#.........这里部分代码省略.........
        box = gui.widgetBox(splitterH, "Sample Annotations")
        self.annotationsTree = QTreeWidget(box)
        self.annotationsTree.setHeaderLabels(
            ["Type (Sample annotations)", "Sample count"]
        )
        self.annotationsTree.setRootIsDecorated(True)
        box.layout().addWidget(self.annotationsTree)
        self.annotationsTree.itemChanged.connect(
            self.annotationSelectionChanged
        )
        self._annotationsUpdating = False
        self.splitters = splitter, splitterH

        for sp, setting in zip(self.splitters, self.splitterSettings):
            sp.splitterMoved.connect(self.splitterMoved)
            sp.restoreState(setting)

        self.searchKeys = ["dataset_id", "title", "platform_organism",
                           "description"]

        self.gds = []
        self.gds_info = None

        self.resize(1000, 600)

        self.setBlocking(True)
        self.setEnabled(False)
        self.progressBarInit()

        self._executor = ThreadExecutor()

        func = partial(get_gds_model,
                       methodinvoke(self, "_setProgress", (float,)))
        self._inittask = Task(function=func)
        self._inittask.finished.connect(self._initializemodel)
        self._executor.submit(self._inittask)

        self._datatask = None

    @Slot(float)
    def _setProgress(self, value):
        self.progressBarValue = value

    def _initializemodel(self):
        assert self.thread() is QThread.currentThread()
        model, self.gds_info, self.gds = self._inittask.result()
        model.setParent(self)

        proxy = self.treeWidget.model()
        proxy.setFilterKeyColumn(0)
        proxy.setFilterRole(TextFilterRole)
        proxy.setFilterCaseSensitivity(False)
        proxy.setFilterFixedString(self.filterString)

        proxy.setSourceModel(model)
        proxy.sort(0, Qt.DescendingOrder)

        self.progressBarFinished()
        self.setBlocking(False)
        self.setEnabled(True)

        filter_items = " ".join(
            gds[key] for gds in self.gds for key in self.searchKeys
        )
        tr_chars = ",.:;!?(){}[]_-+\\|/%#@$^&*<>~`"
        tr_table = str.maketrans(tr_chars, " " * len(tr_chars))

#.........这里部分代码省略.........
            QTimer.singleShot(10, self._maybe_commit)

    @Slot()
    def _maybe_commit(self):
        if self._invalidated:
            self.commit()

    @Slot()
    def advance(self):
        self.progressBarValue = (self.progressBarValue + 1) % 100

    @Slot(float)
    def set_progress(self, value):
        self.progressBarValue = value

    def commit(self):
        include_neighborhood = self.include_neighborhood
        query_genes = self.query_genes()
        source = SOURCES[self.network_source]
        if source.score_filter:
            min_score = self.min_score
            assert source.name == "STRING"
            min_score = min_score * 1000
        else:
            min_score = None

        taxid = self.taxid
        progress = methodinvoke(self, "advance")
        if self.geneinfo is None:
            self.geneinfo = self.executor.submit(
                fetch_ncbi_geneinfo, taxid, progress
            )

        geneinfo_f = self.geneinfo
        taxmap = source.tax_mapping
        db_taxid = taxmap.get(taxid, taxid)

        if db_taxid is None:
            raise ValueError("invalid taxid for this network")

        def fetch_network():
            geneinfo = geneinfo_f.result()
            ppidb = fetch_ppidb(source, db_taxid, progress)
            return get_gene_network(ppidb, geneinfo, db_taxid, query_genes,
                                    include_neighborhood=include_neighborhood,
                                    min_score=min_score,
                                    progress=methodinvoke(self, "set_progress", (float,)))

        self.nettask = Task(function=fetch_network)
        self.nettask.finished.connect(self._on_result_ready)

        self.executor.submit(self.nettask)

        self.setBlocking(True)
        self.setEnabled(False)
        self.progressBarInit()
        self._invalidated = False
        self._update_info()

    @Slot(object)
    def _on_result_ready(self,):
        self.progressBarFinished()
        self.setBlocking(False)
        self.setEnabled(True)
        net = self.nettask.result()
        self._update_info()
        self.send("Network", net)

    def _on_source_db_changed(self):
        source = SOURCES[self.network_source]
        self.score_spin.setEnabled(source.score_filter)
        self.invalidate()

    def _update_organism(self):
        self.taxid = self.taxids[self.current_taxid_index]
        if self.geneinfo is not None:
            self.geneinfo.cancel()
        self.geneinfo = None
        self.invalidate()

    def _update_query_genes(self):
        self.invalidate()

    def _update_info(self):
        if self.data is None:
            self.info.setText("No data on input\n")
        else:
            names = self.query_genes()
            lines = ["%i unique genes on input" % len(set(names))]
            if self.nettask is not None:
                if not self.nettask.future().done():
                    lines.append("Retrieving ...")
                else:
                    net = self.nettask.result()
                    lines.append("%i nodes %i edges" %
                                 (len(net.nodes()), len(net.edges())))
            else:
                lines.append("")

            self.info.setText("\n".join(lines))

    def Update(self):
        """
        Update (recompute enriched pathways) the widget state.
        """
        if not self.data:
            return

        self.error(0)
        self.information(0)

        # XXX: Check data in setData, do not even alow this to be executed if
        # data has no genes
        try:
            genes = self.GeneNamesFromData(self.data)
        except ValueError:
            self.error(0, "Cannot extract gene names from input.")
            genes = []

        if not self.useAttrNames and any("," in gene for gene in genes):
            genes = reduce(add, (split_and_strip(gene, ",")
                                 for gene in genes),
                           [])
            self.information(0,
                             "Separators detected in input gene names. "
                             "Assuming multiple genes per instance.")
        self.queryGenes = genes

        self.information(1)
        reference = None
        if self.useReference and self.refData:
            reference = self.GeneNamesFromData(self.refData)
            if not self.useAttrNames \
                    and any("," in gene for gene in reference):
                reference = reduce(add, (split_and_strip(gene, ",")
                                         for gene in reference),
                                   [])
                self.information(1,
                                 "Separators detected in reference gene "
                                 "names. Assuming multiple genes per "
                                 "instance.")

        org_code = self.SelectedOrganismCode()

        def run_enrichment(org_code, genes, reference=None, progress=None):
            org = kegg.KEGGOrganism(org_code)
            if reference is None:
                reference = org.get_genes()

            # Map 'genes' and 'reference' sets to unique KEGG identifiers
            unique_genes, _, _ = org.get_unique_gene_ids(set(genes))
            unique_ref_genes, _, _ = org.get_unique_gene_ids(set(reference))

            taxid = kegg.to_taxid(org.org_code)
            # Map the taxid back to standard 'common' taxids
            # (as used by 'geneset') if applicable
            r_tax_map = dict((v, k) for k, v in
                             kegg.KEGGGenome.TAXID_MAP.items())
            if taxid in r_tax_map:
                taxid = r_tax_map[taxid]

            # We use the kegg pathway gene sets provided by 'geneset' for
            # the enrichment calculation.

            # Ensure we are using the latest genesets
            # TODO: ?? Is updating the index enough?
            serverfiles.update(geneset.sfdomain, "index.pck")
            kegg_gs_collections = geneset.collections(
                (("KEGG", "pathways"), taxid)
            )

            pathways = pathway_enrichment(
                kegg_gs_collections, unique_genes.keys(),
                unique_ref_genes.keys(),
                callback=progress
            )
            # Ensure that pathway entries are pre-cached for later use in the
            # list/tree view
            kegg_pathways = kegg.KEGGPathways()
            kegg_pathways.pre_cache(
                pathways.keys(), progress_callback=progress
            )

            return pathways, org, unique_genes, unique_ref_genes

        self.progressBarInit()
        self.setEnabled(False)
        self.infoLabel.setText("Retrieving...\n")

        progress = methodinvoke(self, "setProgress", (float,))
        self._enrichTask = Task(
            function=lambda:
                run_enrichment(org_code, genes, reference, progress)
        )
        self._enrichTask.finished.connect(self._onEnrichTaskFinished)
        self._executor.submit(self._enrichTask)

#.........这里部分代码省略.........
                '<p>Please install '
                '<a href="http://pypi.python.org/pypi/slumber">slumber</a> '
                'library to use KEGG Pathways widget.</p>'
            )
            self.infoLabel.setText(
                '<p>Please install '
                '<a href="http://pypi.python.org/pypi/slumber">slumber</a> '
                'library to use KEGG Pathways widget.</p>'
            )
            self.error(0, "Missing slumber/requests library")
            return

        progress = methodinvoke(self, "setProgress", (float,))

        def get_genome():
            """Return a KEGGGenome with the common org entries precached."""
            genome = kegg.KEGGGenome()

            essential = genome.essential_organisms()
            common = genome.common_organisms()
            # Remove duplicates of essential from common.
            # (essential + common list as defined here will be used in the
            # GUI.)
            common = [c for c in common if c not in essential]

            # TODO: Add option to specify additional organisms not
            # in the common list.

            keys = map(genome.org_code_to_entry_key, essential + common)

            genome.pre_cache(keys, progress_callback=progress)
            return (keys, genome)

        self._genomeTask = task = Task(function=get_genome)
        task.finished.connect(self._initializeOrganisms)

        self.progressBarInit()
        self._executor.submit(task)

    def _initializeOrganisms(self):
        self.progressBarFinished()
        try:
            keys, genome = self._genomeTask.result()
        except Exception as err:
            self.error(0, str(err))
            return

        entries = [genome[key] for key in keys]
        items = [entry.definition for entry in entries]
        codes = [entry.organism_code for entry in entries]

        self.organismCodes = codes
        self.organismComboBox.clear()
        self.organismComboBox.addItems(items)
        self.organismComboBox.setCurrentIndex(self.organismIndex)

        self.setEnabled(True)
        self.setBlocking(False)
        self.infoLabel.setText("No data on input\n")

    def Clear(self):
        """
        Clear the widget state.
        """
        self.queryGenes = []
        self.referenceGenes = []

    def __init__(self, parent=None, signalManager=None, wantCloseButton=False, showAll=True):

        OWWidget.__init__(self, parent, signalManager, wantMainArea=False)

        self.searchString = ""
        self.showAll = showAll

        self.serverFiles = serverfiles.ServerFiles()

        box = OWGUI.widgetBox(self.controlArea, orientation="horizontal")

        self.lineEditFilter = \
            OWGUIEx.lineEditHint(box, self, "searchString", "Filter",
                                 caseSensitive=False,
                                 delimiters=" ",
                                 matchAnywhere=True,
                                 listUpdateCallback=self.SearchUpdate,
                                 callbackOnType=True,
                                 callback=self.SearchUpdate)

        box = OWGUI.widgetBox(self.controlArea, "Files")
        self.filesView = QTreeWidget(self)
        self.filesView.setHeaderLabels(
            ["", "Data Source", "Update", "Last Updated", "Size"])

        self.filesView.setRootIsDecorated(False)
        self.filesView.setUniformRowHeights(True)
        self.filesView.setSelectionMode(QAbstractItemView.NoSelection)
        self.filesView.setSortingEnabled(True)
        self.filesView.sortItems(1, Qt.AscendingOrder)
        self.filesView.setItemDelegateForColumn(
            0, UpdateOptionsItemDelegate(self.filesView))

        QObject.connect(self.filesView.model(),
                        SIGNAL("layoutChanged()"),
                        self.SearchUpdate)
        box.layout().addWidget(self.filesView)

        box = OWGUI.widgetBox(self.controlArea, orientation="horizontal")
        self.updateButton = OWGUI.button(box, self, "Update all",
                     callback=self.UpdateAll,
                     tooltip="Update all updatable files",
                     )

        self.downloadButton = OWGUI.button(box, self, "Download all",
                     callback=self.DownloadFiltered,
                     tooltip="Download all filtered files shown")
        self.cancelButton = OWGUI.button(box, self, "Cancel", callback=self.Cancel,
                     tooltip="Cancel scheduled downloads/updates.")
        OWGUI.rubber(box)

        self.retryButton = OWGUI.button(box, self, "Retry",
                                        callback=self.RetrieveFilesList)

        self.retryButton.hide()

        box = OWGUI.widgetBox(self.controlArea, orientation="horizontal")
        OWGUI.rubber(box)
        if wantCloseButton:
            OWGUI.button(box, self, "Close",
                         callback=self.accept,
                         tooltip="Close")

        self.infoLabel = QLabel()
        self.infoLabel.setAlignment(Qt.AlignCenter)

        self.controlArea.layout().addWidget(self.infoLabel)
        self.infoLabel.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)

        self.updateItems = []

        self.resize(800, 600)

        self.progress = ProgressState(self, maximum=3)
        self.progress.valueChanged.connect(self._updateProgress)
        self.progress.rangeChanged.connect(self._updateProgress)
        self.executor = ThreadExecutor(
            threadPool=QThreadPool(maxThreadCount=2)
        )

        task = Task(self, function=self.RetrieveFilesList)
        task.exceptionReady.connect(self.HandleError)
        task.start()

        self._tasks = []
        self._haveProgress = False