class ScatterPlotWidget(pg.QtGui.QSplitter):
"""
This is a high-level widget for exploring relationships in tabular data.
Given a multi-column record array, the widget displays a scatter plot of a
specific subset of the data. Includes controls for selecting the columns to
plot, filtering data, and determining symbol color and shape.
The widget consists of four components:
1) A list of column names from which the user may select 1 or 2 columns
to plot. If one column is selected, the data for that column will be
plotted in a histogram-like manner by using :func:`pseudoScatter()
<pyqtgraph.pseudoScatter>`. If two columns are selected, then the
scatter plot will be generated with x determined by the first column
that was selected and y by the second.
2) A DataFilter that allows the user to select a subset of the data by
specifying multiple selection criteria.
3) A ColorMap that allows the user to determine how points are colored by
specifying multiple criteria.
4) A PlotWidget for displaying the data.
"""
sigScatterPlotClicked = pg.QtCore.Signal(object, object, object)
def __init__(self, parent=None):
pg.QtGui.QSplitter.__init__(self, pg.QtCore.Qt.Horizontal)
self.ctrlPanel = pg.QtGui.QSplitter(pg.QtCore.Qt.Vertical)
self.addWidget(self.ctrlPanel)
self.fieldList = pg.QtGui.QListWidget()
self.fieldList.setSelectionMode(self.fieldList.ExtendedSelection)
self.ptree = pg.parametertree.ParameterTree(showHeader=False)
self.filter = DataFilterParameter()
self.colorMap = ColorMapParameter()
self.style = StyleMapParameter()
self.params = pg.parametertree.Parameter.create(name='params', type='group', children=[self.filter, self.colorMap, self.style])
self.ptree.setParameters(self.params, showTop=False)
self.plot = PlotWidget()
self.ctrlPanel.addWidget(self.fieldList)
self.ctrlPanel.addWidget(self.ptree)
self.addWidget(self.plot)
fg = pg.mkColor(pg.getConfigOption('foreground'))
fg.setAlpha(150)
self.filterText = pg.TextItem(border=pg.getConfigOption('foreground'), color=fg)
self.filterText.setPos(60,20)
self.filterText.setParentItem(self.plot.plotItem)
self.data = None
self.indices = None
self.mouseOverField = None
self.scatterPlot = None
self.selectionScatter = None
self.selectedIndices = []
self._visibleXY = None # currently plotted points
self._visibleData = None # currently plotted records
self._visibleIndices = None
self._indexMap = None
self.fieldList.itemSelectionChanged.connect(self.fieldSelectionChanged)
self.filter.sigFilterChanged.connect(self.filterChanged)
self.colorMap.sigColorMapChanged.connect(self.updatePlot)
self.style.sigStyleChanged.connect(self.updatePlot)
def setFields(self, fields, mouseOverField=None):
"""
Set the list of field names/units to be processed.
The format of *fields* is the same as used by
:func:`ColorMapWidget.setFields <pyqtgraph.widgets.ColorMapWidget.ColorMapParameter.setFields>`
"""
self.fields = OrderedDict(fields)
self.mouseOverField = mouseOverField
self.fieldList.clear()
for f,opts in fields:
item = pg.QtGui.QListWidgetItem(f)
item.opts = opts
item = self.fieldList.addItem(item)
self.filter.setFields(fields)
self.colorMap.setFields(fields)
self.style.setFields(fields)
def setSelectedFields(self, *fields):
self.fieldList.itemSelectionChanged.disconnect(self.fieldSelectionChanged)
try:
self.fieldList.clearSelection()
for f in fields:
i = list(self.fields.keys()).index(f)
item = self.fieldList.item(i)
item.setSelected(True)
finally:
self.fieldList.itemSelectionChanged.connect(self.fieldSelectionChanged)
self.fieldSelectionChanged()
def setData(self, data):
"""
Set the data to be processed and displayed.
Argument must be a numpy record array.
"""
self.data = data
self.indices = np.arange(len(data))
self.filtered = None
self.filteredIndices = None
self.updatePlot()
def setSelectedIndices(self, inds):
"""Mark the specified indices as selected.
Must be a sequence of integers that index into the array given in setData().
"""
self.selectedIndices = inds
self.updateSelected()
def setSelectedPoints(self, points):
"""Mark the specified points as selected.
Must be a list of points as generated by the sigScatterPlotClicked signal.
"""
self.setSelectedIndices([pt.originalIndex for pt in points])
def fieldSelectionChanged(self):
sel = self.fieldList.selectedItems()
if len(sel) > 2:
self.fieldList.blockSignals(True)
try:
for item in sel[1:-1]:
item.setSelected(False)
finally:
self.fieldList.blockSignals(False)
self.updatePlot()
def filterChanged(self, f):
self.filtered = None
self.updatePlot()
desc = self.filter.describe()
if len(desc) == 0:
self.filterText.setVisible(False)
else:
self.filterText.setText('\n'.join(desc))
self.filterText.setVisible(True)
def updatePlot(self):
self.plot.clear()
if self.data is None or len(self.data) == 0:
return
if self.filtered is None:
mask = self.filter.generateMask(self.data)
self.filtered = self.data[mask]
self.filteredIndices = self.indices[mask]
data = self.filtered
if len(data) == 0:
return
colors = np.array([pg.mkBrush(*x) for x in self.colorMap.map(data)])
style = self.style.map(data)
## Look up selected columns and units
sel = list([str(item.text()) for item in self.fieldList.selectedItems()])
units = list([item.opts.get('units', '') for item in self.fieldList.selectedItems()])
if len(sel) == 0:
self.plot.setTitle('')
return
if len(sel) == 1:
self.plot.setLabels(left=('N', ''), bottom=(sel[0], units[0]), title='')
if len(data) == 0:
return
#x = data[sel[0]]
#y = None
xy = [data[sel[0]], None]
elif len(sel) == 2:
self.plot.setLabels(left=(sel[1],units[1]), bottom=(sel[0],units[0]))
if len(data) == 0:
return
xy = [data[sel[0]], data[sel[1]]]
#xydata = []
#for ax in [0,1]:
#d = data[sel[ax]]
### scatter catecorical values just a bit so they show up better in the scatter plot.
##if sel[ax] in ['MorphologyBSMean', 'MorphologyTDMean', 'FIType']:
##d += np.random.normal(size=len(cells), scale=0.1)
#xydata.append(d)
#x,y = xydata
## convert enum-type fields to float, set axis labels
enum = [False, False]
for i in [0,1]:
axis = self.plot.getAxis(['bottom', 'left'][i])
if xy[i] is not None and (self.fields[sel[i]].get('mode', None) == 'enum' or xy[i].dtype.kind in ('S', 'O')):
vals = self.fields[sel[i]].get('values', list(set(xy[i])))
xy[i] = np.array([vals.index(x) if x in vals else len(vals) for x in xy[i]], dtype=float)
axis.setTicks([list(enumerate(vals))])
enum[i] = True
else:
axis.setTicks(None) # reset to automatic ticking
## mask out any nan values
mask = np.ones(len(xy[0]), dtype=bool)
if xy[0].dtype.kind == 'f':
mask &= np.isfinite(xy[0])
if xy[1] is not None and xy[1].dtype.kind == 'f':
mask &= np.isfinite(xy[1])
xy[0] = xy[0][mask]
for k in style.keys():
if style[k] is None:
continue
style[k] = style[k][mask]
style['symbolBrush'] = colors[mask]
data = data[mask]
indices = self.filteredIndices[mask]
## Scatter y-values for a histogram-like appearance
if xy[1] is None:
## column scatter plot
xy[1] = pg.pseudoScatter(xy[0])
else:
xy[1] = xy[1][mask]
## beeswarm plots
for ax in [0,1]:
if not enum[ax]:
continue
imax = int(xy[ax].max()) if len(xy[ax]) > 0 else 0
for i in range(imax+1):
keymask = xy[ax] == i
scatter = pg.pseudoScatter(xy[1-ax][keymask], bidir=True)
if len(scatter) == 0:
continue
smax = np.abs(scatter).max()
if smax != 0:
scatter *= 0.2 / smax
xy[ax][keymask] += scatter
if self.scatterPlot is not None:
try:
self.scatterPlot.sigPointsClicked.disconnect(self.plotClicked)
except:
pass
self._visibleXY = xy
self._visibleData = data
self._visibleIndices = indices
self._indexMap = None
self.scatterPlot = self.plot.plot(xy[0], xy[1], data=data, **style)
self.scatterPlot.sigPointsClicked.connect(self.plotClicked)
self.updateSelected()
def updateSelected(self):
if self._visibleXY is None:
return
# map from global index to visible index
indMap = self._getIndexMap()
inds = [indMap[i] for i in self.selectedIndices if i in indMap]
x,y = self._visibleXY[0][inds], self._visibleXY[1][inds]
if self.selectionScatter is not None:
self.plot.plotItem.removeItem(self.selectionScatter)
if len(x) == 0:
return
self.selectionScatter = self.plot.plot(x, y, pen=None, symbol='s', symbolSize=12, symbolBrush=None, symbolPen='y')
def _getIndexMap(self):
# mapping from original data index to visible point index
if self._indexMap is None:
self._indexMap = {j:i for i,j in enumerate(self._visibleIndices)}
return self._indexMap
def plotClicked(self, plot, points, ev):
# Tag each point with its index into the original dataset
for pt in points:
pt.originalIndex = self._visibleIndices[pt.index()]
self.sigScatterPlotClicked.emit(self, points, ev)
def do_GET(self):
self.thread = thread = OSCThread()
thread.daemon = True
thread.start()
actors = list()
is_item1 = True
is_item2 = True
is_item3 = True
def setPositions():
for ix, item in enumerate(actors):
item.setPos(0, ix * 6)
def scale_data(data, ix, max_items):
scale = 254 / max_items * ix
return [value / max_items + scale for value in data]
try:
self.path = re.sub('[^.a-zA-Z0-9]', "", str(self.path))
if self.path == "" or self.path == None or self.path[:1] == ".":
return
if self.path.endswith(".html"):
f = open(curdir + sep + self.path)
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
self.wfile.write(f.read())
f.close()
elif self.path.endswith(".mjpeg"):
data_points = 1000
self.send_response(200)
plot_data1 = data = deque([0] * data_points)
plot_data2 = data = deque([0] * data_points)
plot_data3 = data = deque([0] * data_points)
plt = PlotWidget(title="<h1>EKG</h1>", name="Merle")
plt.hide()
plotItem1 = pg.PlotCurveItem(pen=pg.mkPen('r', width=2),
name="bjoern")
plotItem2 = pg.PlotCurveItem(pen=pg.mkPen('g', width=2),
name="merle")
plotItem3 = pg.PlotCurveItem(pen=pg.mkPen('b', width=2),
name="uwe")
print type(plotItem1)
pen = pg.mkPen(254, 254, 254)
plotItem1.setShadowPen(pen=pen, width=6, cosmetic=True)
plotItem2.setShadowPen(pen=pen, width=6, cosmetic=True)
plotItem3.setShadowPen(pen=pen, width=6, cosmetic=True)
actors.append(plotItem1)
actors.append(plotItem2)
actors.append(plotItem3)
plotItem1.setPos(0, 0 * 6)
plotItem2.setPos(0, 1 * 6)
plotItem3.setPos(0, 2 * 6)
plt.addItem(plotItem1)
plt.addItem(plotItem2)
plt.addItem(plotItem3)
plt.setLabel('left', "<h2>Amplitude</h2>")
plt.setLabel('bottom', "<h2>Time</h2>")
plt.showGrid(True, True)
ba = plt.getAxis("bottom")
bl = plt.getAxis("left")
ba.setTicks([])
bl.setTicks([])
plt.setYRange(0, 254)
self.wfile.write(
"Content-Type: multipart/x-mixed-replace; boundary=--aaboundary"
)
self.wfile.write("\r\n\r\n")
plt.resize(1280, 720)
while 1:
while 1:
try:
osc_address, args = queue.get_nowait()
except Queue.Empty:
break
value = args[0]
if osc_address == "/bjoern/ekg":
plot_data1.append(value)
plot_data1.popleft()
try:
plotItem1.setData(y=np.array(
scale_data(plot_data1,
actors.index(plotItem1),
len(actors))),
clear=True)
except ValueError:
pass
elif osc_address == "/merle/ekg":
plot_data2.append(value)
plot_data2.popleft()
try:
plotItem2.setData(y=np.array(
scale_data(plot_data2,
actors.index(plotItem2),
len(actors))),
clear=True)
except ValueError:
pass
elif osc_address == "/uwe/ekg":
plot_data3.append(value)
plot_data3.popleft()
try:
plotItem3.setData(y=np.array(
scale_data(plot_data3,
actors.index(plotItem3),
len(actors))),
clear=True)
except ValueError:
pass
elif osc_address == "/plot/uwe":
if value == 1 and is_item3 == False:
print "uwe on"
plt.addItem(plotItem3)
is_item3 = True
actors.append(plotItem3)
setPositions()
elif value == 0 and is_item3 == True:
print "uwe off"
plt.removeItem(plotItem3)
is_item3 = False
actors.remove(plotItem3)
setPositions()
elif osc_address == "/plot/merle":
if value == 1 and is_item2 == False:
print "merle on"
plt.addItem(plotItem2)
is_item2 = True
actors.append(plotItem2)
setPositions()
elif value == 0 and is_item2 == True:
print "merle off"
plt.removeItem(plotItem2)
is_item2 = False
actors.remove(plotItem2)
setPositions()
elif osc_address == "/plot/bjoern":
if value == 1 and is_item1 == False:
print "bjoern on"
plt.addItem(plotItem1)
is_item1 = True
actors.append(plotItem1)
setPositions()
elif value == 0 and is_item1 == True:
print "bjoern off"
plt.removeItem(plotItem1)
is_item1 = False
actors.remove(plotItem1)
setPositions()
exporter = pg.exporters.ImageExporter.ImageExporter(
plt.plotItem)
img = exporter.export("tmpfile", True)
buffer = QBuffer()
buffer.open(QIODevice.WriteOnly)
img.save(buffer, "JPG", 100)
JpegData = buffer.data()
del buffer
self.wfile.write(
"--aaboundary\r\nContent-Type: image/jpeg\r\nContent-length: %d\r\n\r\n%s\r\n\r\n\r\n"
% (len(JpegData), JpegData))
elif self.path.endswith(".jpeg"):
f = open(curdir + sep + self.path)
self.send_response(200)
self.send_header('Content-type', 'image/jpeg')
self.end_headers()
self.wfile.write(f.read())
f.close()
return
except (KeyboardInterrupt, SystemError):
thread.running = False
thread.join()
except IOError:
self.send_error(404, 'File Not Found: %s' % self.path)
class EkgPlotWidget(QMainWindow):
def __init__(self, args, parent=None):
self.args = args
QMainWindow.__init__(self, parent)
self.mcount = 0
self.osc_sock = QUdpSocket(self)
logger.info("osc bind localhost %d", self.args.client_port)
self.osc_sock.bind(QHostAddress(self.args.client_host), self.args.client_port)
self.osc_sock.readyRead.connect(self.got_message)
self.osc_sock.error.connect(self.handle_osc_error)
self.subscribe()
self.plot_widget = PlotWidget()
self.setCentralWidget(self.plot_widget)
self.resize(args.client_width, args.client_height)
colors = ["r", "g", "b"]
self.active_actors = list()
self.actors = dict()
self.max_value = 255
actor_names = ["merle", "uwe", "bjoern"]
self.max_actors = len(actor_names)
self.actor_height = self.max_value / self.max_actors
self.fps = 12.5
self.num_data = 100
self.plot_widget.showGrid(False, False)
self.plot_widget.setYRange(0, 255)
self.plot_widget.setXRange(0, self.num_data)
self.plot_widget.resize(args.client_width, args.client_height)
bottom_axis = self.plot_widget.getAxis("bottom")
left_axis = self.plot_widget.getAxis("left")
bottom_axis.setTicks([])
left_axis.setTicks([])
bottom_axis.hide()
left_axis.hide()
for ix, (actor_name, color) in enumerate(zip(actor_names, colors)):
self.add_actor(actor_name, self.num_data, color, ix, self.max_actors, self.actor_height)
self.set_positions()
self.ekg_regex = re.compile("^/(.*?)/ekg$")
self.heartbeat_regex = re.compile("^/(.*?)/heartbeat$")
self.timer = QtCore.QTimer()
self.timer.timeout.connect(self.render_image)
self.timer.start(50)
def subscribe(self):
logger.info("subscribe")
msg = OSCMessage("/subscribe")
msg.appendTypedArg(self.args.client_host, "s")
msg.appendTypedArg(self.args.client_port, "i")
msg.appendTypedArg(self.args.authenticate, "s")
if self.args.subscriber_label is not None:
msg.appendTypedArg(self.args.subscriber_label, "s")
self.osc_sock.writeDatagram(QByteArray(msg.encode_osc()), QHostAddress(self.args.chaosc_host),
self.args.chaosc_port)
def unsubscribe(self):
logger.info("unsubscribe")
msg = OSCMessage("/unsubscribe")
msg.appendTypedArg(self.args.client_host, "s")
msg.appendTypedArg(self.args.client_port, "i")
msg.appendTypedArg(self.args.authenticate, "s")
self.osc_sock.writeDatagram(QByteArray(msg.encode_osc()), QHostAddress(self.args.chaosc_host),
self.args.chaosc_port)
def handle_osc_error(self, error):
logger.info("osc socket error %d", error)
def closeEvent(self, event):
logger.info("closeEvent %r", event)
self.unsubscribe()
event.accept()
def pubdir(self):
return os.path.dirname(os.path.abspath(__file__))
def add_actor(self, actor_name, num_data, color, ix, max_actors, actor_height):
actor_obj = Actor(actor_name, num_data, color, ix, max_actors, actor_height)
self.actors[actor_name] = actor_obj
self.plot_widget.addItem(actor_obj.plotItem)
self.plot_widget.addItem(actor_obj.plotPoint)
self.active_actors.append(actor_obj)
def set_positions(self):
for ix, actor_obj in enumerate(self.active_actors):
actor_obj.plotItem.setPos(0, ix * 2)
actor_obj.plotPoint.setPos(0, ix * 2)
def active_actor_count(self):
return self.max_actors
def update(self, osc_address, args):
res = self.ekg_regex.match(osc_address)
if res:
self.mcount += 1
actor_name = res.group(1)
actor_obj = self.actors[actor_name]
actor_obj.add_value(args[0])
logger.info("actor: %r, %r", actor_name, args)
def render_image(self):
for actor_obj in self.active_actors:
actor_obj.add_value(actor_obj.osci.next())
actor_obj.render()
@QtCore.pyqtSlot()
def render_image(self):
for actor_obj in self.active_actors:
actor_obj.render()
print self.mcount
def got_message(self):
while self.osc_sock.hasPendingDatagrams():
data, address, port = self.osc_sock.readDatagram(self.osc_sock.pendingDatagramSize())
try:
osc_address, typetags, args = decode_osc(data, 0, len(data))
self.update(osc_address, args)
except ValueError, error:
logger.exception(error)
