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Python QThreadPool.activeThreadCount方法代码示例

本文整理汇总了Python中PyQt4.QtCore.QThreadPool.activeThreadCount方法的典型用法代码示例。如果您正苦于以下问题:Python QThreadPool.activeThreadCount方法的具体用法?Python QThreadPool.activeThreadCount怎么用?Python QThreadPool.activeThreadCount使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在PyQt4.QtCore.QThreadPool的用法示例。


在下文中一共展示了QThreadPool.activeThreadCount方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。

示例1: CatalogDialogTool

# 需要导入模块: from PyQt4.QtCore import QThreadPool [as 别名]
# 或者: from PyQt4.QtCore.QThreadPool import activeThreadCount [as 别名]
class CatalogDialogTool(QObject):
    """
    Tool for managing the search and export functionality
    """

    def __init__(self, iface, dialog_ui, bbox_tool):
        """
        Constructor for the dialog tool
        :param iface: The QGIS Interface
        :param dialog_ui: The dialog GUI
        :param bbox_tool The bounding box tool
        :return: dialog tool
        """
        QObject.__init__(self, None)
        self.iface = iface
        self.dialog_ui = dialog_ui
        self.bbox_tool = bbox_tool

        self.progress_bar = None
        self.progress_message_bar = None
        self.progress_message_bar_widget = None
        self.search_thread_pool = QThreadPool()
        self.search_lock = Lock()
        self.export_thread_pool = QThreadPool()
        self.export_lock = Lock()
        self.query = None
        self.previous_credentials = None
        self.export_file = None
        self.footprint_layer = None

        self.filters = CatalogFilters(self.dialog_ui)

        self.dialog_ui.aoi_button.clicked.connect(self.aoi_button_clicked)
        self.dialog_ui.reset_button.clicked.connect(self.reset_button_clicked)
        self.dialog_ui.export_button.clicked.connect(self.export_button_clicked)
        self.bbox_tool.released.connect(self.search)
        self.model = None

    def init_progress_bar(self, progress_max):
        """
        Sets up the progress bar for search functionality
        :return: None
        """
        if not self.progress_message_bar:
            self.progress_message_bar = self.iface.messageBar().createMessage("Querying for data")
            self.progress_bar = QProgressBar()
            self.progress_bar.setMinimum(0)
            self.progress_bar.setMaximum(progress_max)
            self.progress_bar.setAlignment(Qt.AlignLeft | Qt.AlignCenter)
            self.progress_message_bar.layout().addWidget(self.progress_bar)
            self.progress_message_bar_widget = self.iface.messageBar().pushWidget(self.progress_message_bar, self.iface.messageBar().INFO)

    def init_layers(self):
        """
        Sets up the layers for rendering the items
        :return: None
        """
        if self.footprint_layer:
            QgsMapLayerRegistry.instance().removeMapLayer(self.footprint_layer.id())

        self.footprint_layer = QgsVectorLayer("Polygon?crs=EPSG:4326", "Catalog Footprints", "memory")
        self.footprint_layer.setCrs(QgsCoordinateReferenceSystem(4326), True)
        self.footprint_layer.dataProvider().addAttributes(CatalogAcquisitionFeature.get_fields())
        QgsMapLayerRegistry.instance().addMapLayer(self.footprint_layer)

    def clear_widgets(self):
        """
        Clears the progress bar
        :return: None
        """
        self.progress_bar = None
        self.progress_message_bar = None
        if self.progress_message_bar_widget:
            self.iface.messageBar().popWidget(self.progress_message_bar_widget)
        self.progress_message_bar_widget = None

    def is_searching(self):
        """
        Check to see if the system is still searching (checks if there's work in the search thread pool)
        :return: True if searching; False otherwise
        """
        return self.get_search_active_thread_count() > 0

    def is_exporting(self):
        """
        Check to see if the system is still exporting (checks if there's work in the export thread pool)
        :return: True if searching; False otherwise
        """
        return self.get_export_active_thread_count() > 0

    def get_search_active_thread_count(self):
        """
        Gets the number of active threads in the search thread pool
        :return:
        """
        with self.search_lock:
            return self.search_thread_pool.activeThreadCount()

    def get_export_active_thread_count(self):
        """
#.........这里部分代码省略.........
开发者ID:DigitalGlobe,项目名称:DGConnect,代码行数:103,代码来源:CatalogDialogTool.py


注:本文中的PyQt4.QtCore.QThreadPool.activeThreadCount方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。