def show3dB(self, freq):
label = "-3 dB at f = %.3g" % freq
text = Qwt.QwtText(label)
text.setFont(QFont("Helvetica", 10, QFont.Bold))
text.setColor(Qt.green)
self.d_marker1.setValue(freq, 0.0)
self.d_marker1.setLabel(text)
def showPeak(self, freq, amplitude):
label = "Peak: %.3g dB" % amplitude
text = Qwt.QwtText(label)
text.setFont(QFont("Helvetica", 10, QFont.Bold))
text.setColor(QColor(200, 150, 0))
self.d_marker2.setValue(freq, amplitude)
self.d_marker2.setLabel(text)