This is what I ended up with, almost identical what you provided.
The TextItem pulls values from a pandas column. There's also a vertical
line as an X axis highlighter. PlotIndicators is initiated in a Main
function (just a dict).
I haven't found a more intelligent way to hide the items when cursor is not
in the scene. Main.chart.add does plot.addItem(item) in
GraphicsLayoutWidget, refresh does 'clear' first.
class MousePosition(QObject):
def __init__(self, plot, name):
super().__init__()
self.plot = plot
self.name = name
self.proxy = pg.SignalProxy(plot.scene().sigMouseMoved, rateLimit=60,
slot=self.mouseMoved)
def mouseMoved(self, event):
pos = event[0]
if self.plot.sceneBoundingRect().contains(pos):
Main.plotIndicators.labels[self.name].show()
Main.plotIndicators.cross[self.name].show()
Main.plotIndicators.labelCoords(self.plot.vb.mapSceneToView(pos),
self.name)
else:
Main.plotIndicators.labels[self.name].hide()
Main.plotIndicators.cross[self.name].hide()
...
for name, val in self.plottedIndicators.items():
label = pg.TextItem('', color="#edede6", anchor
=(-0.3, 1.5),
border=pg.mkPen('#fcfcfc'),
fill="#443a2e")
self.labels[name] = Main.chart.add(val['plt'], label)
cross = pg.InfiniteLine(angle=90, movable=False,
pen={"color": "#8080ff"})
self.cross[name] = Main.chart.add(val['plt'], cross)
self.mp[val['plt']] = MousePosition(val['plt'], name)
def labelCoords(self, mp, name):
index = int(mp.x() + 0.5) - 1
col = self.plottedIndicators[name]['col']
self.labels[name].setText(f'{self._charts[col].iloc[index].astype(str
)}')
self.labels[name].setPos(mp)
self.cross[name].setPos(mp)
On Saturday, May 9, 2020 at 10:00:09 PM UTC+8, Edmondo Giovannozzi wrote:
>
> I have solved it this way:
>
> class MousePosition(QtCore.QObject):
> def __init__(self, status_bar, pl, labels):
> super().__init__()
> self.pl = pl
> self.status_bar = status_bar
> self.labels = labels
> self.proxy = pg.SignalProxy(pl.scene().sigMouseMoved, rateLimit=10
> , slot=self.mousemoved)
>
>
> def mousemoved(self, evt):
> pos = evt[0]
> if self.pl.sceneBoundingRect().contains(pos):
> mousePoint = self.pl.vb.mapSceneToView(pos)
> self.status_bar.set_x(mousePoint.x(),self.labels[0])
> self.status_bar.set_y(mousePoint.y(),self.labels[1])
>
> class StatusBarKK3:
> def __init__(self, window, plots):
> self.window = window
> self.plots = plots
> self.status_bar = window.statusBar()
>
> self.x_label = QtWidgets.QLabel("x: ")
> self.y_label = QtWidgets.QLabel("y: ")
>
> self.status_bar.addPermanentWidget(self.x_label)
> self.status_bar.addPermanentWidget(self.y_label)
> self.mouse_position = {}
> for (name,pl),labels in plots.items():
> self.mouse_position[pl] = MousePosition(self, pl, labels)
>
> def set_x(self, x, prefix='x'):
> self.x_label.setText(f"{prefix}: {x:8.5g} ")
>
> def set_y(self, y, prefix='y'):
> self.y_label.setText(f"{prefix}: {y:8.5g} ")
>
>
> Where *plots* is a dict with keys being (*name, plotItem*) and value a
> string that I want to show for the x and y coordinates on the status bar.
> At the moment *name *is not used and I may delete it.
>
> Cheers,
>
>
> Il giorno sabato 9 maggio 2020 00:59:35 UTC+2, Bertram Gilfoyle ha scritto:
>>
>> Is there a way to find out which viewbox or widget the current mouse
>> coordinates are on?
>>
>> I'm plotting multiple viewboxes, each with one widget inside, then using
>> SignalProxy to capture sigMouseMoved signals.
>> With one viewbox, it's simple but I'm pulling hairs on how to do it with
>> multiple. Goal is to display a simple tooltip (TextItem).
>>
>
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