value_extractor_views.py 文件源码

def __init__(self, parent, model):
        super(ExtractorWidget, self).__init__(parent)
        self.setAttribute(Qt.WA_DeleteOnClose)              # This is required to stop background timers!

        self.on_remove = lambda: None

        self._model = model

        self._update_timer = QTimer(self)
        self._update_timer.setSingleShot(False)
        self._update_timer.timeout.connect(self._update)
        self._update_timer.start(200)

        self._delete_button = make_icon_button('trash-o', 'Remove this extractor', self, on_clicked=self._do_remove)

        self._color_button = make_icon_button('paint-brush', 'Change plot color', self, on_clicked=self._change_color)
        self._color_button.setFlat(True)
        _set_color(self._color_button, QPalette.Button, model.color)

        self._extraction_expression_box = QLineEdit(self)
        self._extraction_expression_box.setToolTip('Extraction expression')
        self._extraction_expression_box.setFont(get_monospace_font())
        self._extraction_expression_box.setText(model.extraction_expression.source)
        self._extraction_expression_box.textChanged.connect(self._on_extraction_expression_changed)
        self._extraction_expression_box.setCompleter(
            _make_expression_completer(self._extraction_expression_box, model.data_type_name))

        self._error_label = make_icon_button('warning', 'Extraction error count; click to reset', self,
                                             on_clicked=self._reset_errors)
        self._reset_errors()

        def box(text, tool_tip):
            w = QLineEdit(self)
            w.setReadOnly(True)
            w.setFont(get_monospace_font())
            w.setText(str(text))
            w.setToolTip(tool_tip)
            fm = QFontMetrics(w.font())
            magic_number = 10
            text_size = fm.size(0, w.text())
            w.setMinimumWidth(text_size.width() + magic_number)
            return w

        layout = QHBoxLayout(self)
        layout.addWidget(self._delete_button)
        layout.addWidget(self._color_button)
        layout.addWidget(box(model.data_type_name, 'Message type name'))
        layout.addWidget(box(' AND '.join([x.source for x in model.filter_expressions]), 'Filter expressions'))
        layout.addWidget(self._extraction_expression_box, 1)
        layout.addWidget(self._error_label)
        layout.setContentsMargins(0, 0, 0, 0)
        self.setLayout(layout)