class qwtchart(chart):
colours = {'red' : Qt.red,
'green' : Qt.green,
'blue' : Qt.blue,
'yellow' : Qt.yellow,
'magenta': Qt.magenta,
'black' : Qt.black}
styles = {'-' : Qt.SolidLine,
'--': Qt.DashLine,
':' : Qt.DotLine,
'-.': Qt.DashDotLine}
def getPen(self, colour, style):
return QPen(self.colours[colour], 1, self.styles[style])
def __init__(self, spurset, fef, parent):
chart.__init__(self, spurset, fef, parent)
self.plot = QwtPlot(parent)
self.plot.setAxisScale(xaxis, self.spurset.RFmin,
self.spurset.RFmax)
self.plot.setAxisScale(yaxis, -self.spurset.dspan/2,
self.spurset.dspan/2)
self.plot.setCanvasBackground(Qt.white)
grid = QwtPlotGrid()
grid.setMajPen(QPen(Qt.black, 1, Qt.DotLine))
grid.attach(self.plot)
self.plot.insertLegend(QwtLegend(self.parent), QwtPlot.ExternalLegend)
# a picker to be used for the front-end filter parallelogram
self.picker = QwtPlotPicker(xaxis, yaxis,
QwtPicker.PointSelection,
QwtPlotPicker.NoRubberBand,
QwtPicker.AlwaysOff,
self.plot.canvas())
# gonna need this to implement ondrop()
self._mouseRelease = self.picker.widgetMouseReleaseEvent
self._picked_obj = None
self.picker.connect(self.picker, SIGNAL('appended(const QPoint&)'),
self.onpick)
self.picker.connect(self.picker, SIGNAL('moved(const QPoint&)'),
self.ondrag)
# all about the monkey-patching
self.picker.widgetMouseReleaseEvent = self.ondrop
def redraw(self):
xscale = self.plot.axisScaleDiv(xaxis)
yscale = self.plot.axisScaleDiv(yaxis)
#TODO check if it hurts to just set the scales every time, as in mpl
if (xscale.lowerBound() != self.spurset.RFmin or
xscale.upperBound() != self.spurset.RFmax):
self.plot.setAxisScale(xaxis, self.spurset.RFmin,
self.spurset.RFmax)
if (yscale.lowerBound() != -self.spurset.dspan/2 or
yscale.upperBound() != self.spurset.dspan/2):
self.plot.setAxisScale(yaxis, -self.spurset.dspan/2,
self.spurset.dspan/2)
self.plot.replot()
def mkline(self, xdata, ydata, style=('black','-'), title=''):
line = QwtPlotCurve(title)
if title is '':
# don't display it in the legend
# kind of ugly, that the title variable is doing double duty
line.setItemAttribute(QwtPlotItem.Legend, False)
pen = self.getPen(*style)
line.setPen(pen)
line.setRenderHint(QwtPlotItem.RenderAntialiased)
line.setData(xdata, ydata)
return line
def add_line(self, line):
line.attach(self.plot)
def del_line(self, line):
line.detach()
def legend(self):
return self.plot.legend()
def _xval(self, pos):
# from a QPoint referring to a pixel on the plot, find the x value
return self.plot.invTransform(xaxis, pos.x())
def _yval(self, pos):
# from a QPoint referring to a pixel on the plot, find the y value
return self.plot.invTransform(yaxis, pos.y())
def onpick(self, pos):
# for now, we only worry about picking the two vertical lines of the
# front-end filter parallelogram. Other clicks are no-ops.
if abs(pos.x() - self.plot.transform(xaxis, self.fef.start)) <= 10:
# TODO check pos.y() as well
self._picked_obj = self.fef.startline
self.pick(self.fef.startline, self._xval(pos), self._yval(pos))
elif abs(pos.x() - self.plot.transform(xaxis, self.fef.stop)) <= 10:
self._picked_obj = self.fef.stopline
self.pick(self.fef.stopline, self._xval(pos), self._yval(pos))
else:
return
# TODO decide if a pick should also trigger a drag.
# TODO this may be duplicated somewhere...
self.ondrag(pos)
def ondrag(self, pos):
# no dragging action if we haven't already successfully picked something
if self._picked_obj is not None:
self.drag(self._picked_obj, self._xval(pos), self._yval(pos))
def ondrop(self, evt):
# need to make sure we're only triggering on left button releases
if evt.button() == Qt.LeftButton and self._picked_obj is not None:
self.drop(self._picked_obj, self._xval(evt), self._yval(evt))
self._picked_obj = None
# also important to let the original event handler happen
self._mouseRelease(evt)
class qwtchart(chart):
colours = {
'red': Qt.red,
'green': Qt.green,
'blue': Qt.blue,
'yellow': Qt.yellow,
'magenta': Qt.magenta,
'black': Qt.black
}
styles = {
'-': Qt.SolidLine,
'--': Qt.DashLine,
':': Qt.DotLine,
'-.': Qt.DashDotLine
}
def getPen(self, colour, style):
return QPen(self.colours[colour], 1, self.styles[style])
def __init__(self, spurset, fef, parent):
chart.__init__(self, spurset, fef, parent)
self.plot = QwtPlot(parent)
self.plot.setAxisScale(xaxis, self.spurset.RFmin, self.spurset.RFmax)
self.plot.setAxisScale(yaxis, -self.spurset.dspan / 2,
self.spurset.dspan / 2)
self.plot.setCanvasBackground(Qt.white)
grid = QwtPlotGrid()
grid.setMajPen(QPen(Qt.black, 1, Qt.DotLine))
grid.attach(self.plot)
self.plot.insertLegend(QwtLegend(self.parent), QwtPlot.ExternalLegend)
# a picker to be used for the front-end filter parallelogram
self.picker = QwtPlotPicker(xaxis, yaxis, QwtPicker.PointSelection,
QwtPlotPicker.NoRubberBand,
QwtPicker.AlwaysOff, self.plot.canvas())
# gonna need this to implement ondrop()
self._mouseRelease = self.picker.widgetMouseReleaseEvent
self._picked_obj = None
self.picker.connect(self.picker, SIGNAL('appended(const QPoint&)'),
self.onpick)
self.picker.connect(self.picker, SIGNAL('moved(const QPoint&)'),
self.ondrag)
# all about the monkey-patching
self.picker.widgetMouseReleaseEvent = self.ondrop
def redraw(self):
xscale = self.plot.axisScaleDiv(xaxis)
yscale = self.plot.axisScaleDiv(yaxis)
#TODO check if it hurts to just set the scales every time, as in mpl
if (xscale.lowerBound() != self.spurset.RFmin
or xscale.upperBound() != self.spurset.RFmax):
self.plot.setAxisScale(xaxis, self.spurset.RFmin,
self.spurset.RFmax)
if (yscale.lowerBound() != -self.spurset.dspan / 2
or yscale.upperBound() != self.spurset.dspan / 2):
self.plot.setAxisScale(yaxis, -self.spurset.dspan / 2,
self.spurset.dspan / 2)
self.plot.replot()
def mkline(self, xdata, ydata, style=('black', '-'), title=''):
line = QwtPlotCurve(title)
if title is '':
# don't display it in the legend
# kind of ugly, that the title variable is doing double duty
line.setItemAttribute(QwtPlotItem.Legend, False)
pen = self.getPen(*style)
line.setPen(pen)
line.setRenderHint(QwtPlotItem.RenderAntialiased)
line.setData(xdata, ydata)
return line
def add_line(self, line):
line.attach(self.plot)
def del_line(self, line):
line.detach()
def legend(self):
return self.plot.legend()
def _xval(self, pos):
# from a QPoint referring to a pixel on the plot, find the x value
return self.plot.invTransform(xaxis, pos.x())
def _yval(self, pos):
# from a QPoint referring to a pixel on the plot, find the y value
return self.plot.invTransform(yaxis, pos.y())
def onpick(self, pos):
# for now, we only worry about picking the two vertical lines of the
# front-end filter parallelogram. Other clicks are no-ops.
if abs(pos.x() - self.plot.transform(xaxis, self.fef.start)) <= 10:
# TODO check pos.y() as well
self._picked_obj = self.fef.startline
self.pick(self.fef.startline, self._xval(pos), self._yval(pos))
elif abs(pos.x() - self.plot.transform(xaxis, self.fef.stop)) <= 10:
self._picked_obj = self.fef.stopline
self.pick(self.fef.stopline, self._xval(pos), self._yval(pos))
else:
return
# TODO decide if a pick should also trigger a drag.
# TODO this may be duplicated somewhere...
self.ondrag(pos)
def ondrag(self, pos):
# no dragging action if we haven't already successfully picked something
if self._picked_obj is not None:
self.drag(self._picked_obj, self._xval(pos), self._yval(pos))
def ondrop(self, evt):
# need to make sure we're only triggering on left button releases
if evt.button() == Qt.LeftButton and self._picked_obj is not None:
self.drop(self._picked_obj, self._xval(evt), self._yval(evt))
self._picked_obj = None
# also important to let the original event handler happen
self._mouseRelease(evt)