owspectra.py 文件源码

def __init__(self, graph):
        ViewBox.__init__(self, enableMenu=False)
        self.graph = graph
        self.setMouseMode(self.PanMode)
        self.zoomstartpoint = None
        self.current_selection = None
        self.action = PANNING
        self.y_padding = 0.02
        self.x_padding = 0

        # line for marking selection
        self.selection_line = pg.PlotCurveItem()
        self.selection_line.setPen(pg.mkPen(color=QColor(Qt.black), width=2, style=Qt.DotLine))
        self.selection_line.setZValue(1e9)
        self.selection_line.hide()
        self.addItem(self.selection_line, ignoreBounds=True)

        # yellow marker for ending the polygon
        self.selection_poly_marker = pg.ScatterPlotItem()
        self.selection_poly_marker.setPen(pg.mkPen(color=QColor(Qt.yellow), width=2))
        self.selection_poly_marker.setSize(SELECT_POLYGON_TOLERANCE*2)
        self.selection_poly_marker.setBrush(None)
        self.selection_poly_marker.setZValue(1e9+1)
        self.selection_poly_marker.hide()
        self.selection_poly_marker.mouseClickEvent = lambda x: x  # ignore mouse clicks
        self.addItem(self.selection_poly_marker, ignoreBounds=True)