test.py 文件源码

def __init__(self, context):
        """
        TestPlugin class to evaluate the image_recognition_msgs interfaces
        :param context: QT context, aka parent
        """
        super(TestPlugin, self).__init__(context)

        # Widget setup
        self.setObjectName('Test Plugin')

        self._widget = QWidget()
        context.add_widget(self._widget)

        # Layout and attach to widget
        layout = QVBoxLayout()  
        self._widget.setLayout(layout)

        self._image_widget = ImageWidget(self._widget, self.image_roi_callback, clear_on_click=True)
        layout.addWidget(self._image_widget)

        # Input field
        grid_layout = QGridLayout()
        layout.addLayout(grid_layout)

        self._info = QLineEdit()
        self._info.setDisabled(True)
        self._info.setText("Draw a rectangle on the screen to perform recognition of that ROI")
        layout.addWidget(self._info)

        # Bridge for opencv conversion
        self.bridge = CvBridge()

        # Set subscriber and service to None
        self._sub = None
        self._srv = None