diff --git a/piker/ui/qt/quantdom/charts.py b/piker/ui/qt/quantdom/charts.py index 3b81e6ba..6a87ce2d 100644 --- a/piker/ui/qt/quantdom/charts.py +++ b/piker/ui/qt/quantdom/charts.py @@ -66,14 +66,14 @@ class PriceAxis(pg.AxisItem): def __init__(self): super().__init__(orientation='right') - # self.setStyle(**{ - # 'textFillLimits': [(0, 0.8)], - # # 'tickTextWidth': 5, - # # 'tickTextHeight': 5, - # # 'autoExpandTextSpace': True, - # # 'maxTickLength': -20, - # }) - # self.setLabel(**{'font-size':'10pt'}) + self.setStyle(**{ + 'textFillLimits': [(0, 0.8)], + # 'tickTextWidth': 5, + # 'tickTextHeight': 5, + # 'autoExpandTextSpace': True, + # 'maxTickLength': -20, + }) + self.setLabel(**{'font-size': '10pt'}) self.setTickFont(_font) # XXX: drop for now since it just eats up h space @@ -224,6 +224,8 @@ class XAxisLabel(AxisLabel): def tick_to_string(self, tick_pos): # TODO: change to actual period tpl = self.parent.tick_tpl['D1'] + if tick_pos > len(Quotes): + return 'Unknown Time' return fromtimestamp(Quotes[round(tick_pos)].time).strftime(tpl) def boundingRect(self): # noqa @@ -280,50 +282,6 @@ class ChartView(pg.ViewBox): # disable vertical scrolling self.setMouseEnabled(x=True, y=False) - # assign callback for rescaling y-axis automatically - # based on y-range contents - self.chart.sigXRangeChanged.connect(self._update_yrange_limits) - - def _update_yrange_limits(self): - """Callback for each y-range update. - - This adds auto-scaling like zoom on the scroll wheel such - that data always fits nicely inside the current view of the - data set. - """ - # TODO: this can likely be ported in part to the built-ins: - # self.setYRange(Quotes.low.min() * .98, Quotes.high.max() * 1.02) - # self.setMouseEnabled(x=True, y=False) - # self.setXRange(Quotes[0].id, Quotes[-1].id) - # self.setAutoVisible(x=False, y=True) - # self.enableAutoRange(x=False, y=True) - - chart = self.chart - chart_parent = chart.parent - - vr = self.chart.viewRect() - lbar, rbar = int(vr.left()), int(vr.right()) - - if chart_parent.signals_visible: - chart_parent._show_text_signals(lbar, rbar) - - bars = Quotes[lbar:rbar] - ylow = bars.low.min() * 0.98 - yhigh = bars.high.max() * 1.02 - - std = np.std(bars.close) - chart.setLimits(yMin=ylow, yMax=yhigh, minYRange=std) - chart.setYRange(ylow, yhigh) - - for i, d in chart_parent.indicators: - # ydata = i.plotItem.items[0].getData()[1] - ydata = d[lbar:rbar] - ylow = ydata.min() * 0.98 - yhigh = ydata.max() * 1.02 - std = np.std(ydata) - i.setLimits(yMin=ylow, yMax=yhigh, minYRange=std) - i.setYRange(ylow, yhigh) - def wheelEvent(self, ev, axis=None): """Override "center-point" location for scrolling. @@ -343,10 +301,11 @@ class ChartView(pg.ViewBox): s = 1.02 ** (ev.delta() * self.state['wheelScaleFactor']) s = [(None if m is False else s) for m in mask] - # XXX: scroll "around" the right most element in the view # center = pg.Point( # fn.invertQTransform(self.childGroup.transform()).map(ev.pos()) # ) + + # XXX: scroll "around" the right most element in the view furthest_right_coord = self.boundingRect().topRight() center = pg.Point( fn.invertQTransform( @@ -372,10 +331,130 @@ class ChartPlotWidget(pg.PlotWidget): (Could be replaced with a ``pg.GraphicsLayoutWidget`` if we eventually want multiple plots managed together). """ - sig_mouse_leave = QtCore.Signal(object) sig_mouse_enter = QtCore.Signal(object) + def __init__( + self, + split_charts, + **kwargs, + # parent=None, + # background='default', + # plotItem=None, + # **kargs + ): + """Configure chart display settings. + """ + + super().__init__(**kwargs) + # label = pg.LabelItem(justify='left') + # self.addItem(label) + # label.setText("Yo yoyo") + # label.setText("x=") + self.parent = split_charts + + # show only right side axes + self.hideAxis('left') + self.showAxis('right') + + # show background grid + self.showGrid(x=True, y=True, alpha=0.4) + + # use cross-hair for cursor + self.setCursor(QtCore.Qt.CrossCursor) + + # set panning limits + min_points_to_show = 20 + min_bars_in_view = 10 + max_lookahead = min_points_to_show - min_bars_in_view + last = Quotes[-1].id + self.setLimits( + xMin=Quotes[0].id, + xMax=last + max_lookahead, + minXRange=min_points_to_show, + # maxYRange=highest-lowest, + yMin=Quotes.low.min() * 0.98, + yMax=Quotes.high.max() * 1.02, + ) + + # show last 50 points on startup + self.plotItem.vb.setXRange(last - 50, last + max_lookahead) + + # assign callback for rescaling y-axis automatically + # based on y-range contents + self.sigXRangeChanged.connect(self._update_yrange_limits) + self._update_yrange_limits() + + def bars_range(self): + """Return a range tuple for the bars present in view. + """ + + vr = self.viewRect() + lbar, rbar = int(vr.left()), int(min(vr.right(), len(Quotes) - 1)) + return lbar, rbar + + def draw_ohlc( + self, + style: ChartType = ChartType.BAR, + ) -> None: + """Draw OHLC datums to chart. + """ + + # adds all bar/candle graphics objects for each + # data point in the np array buffer to + # be drawn on next render cycle + self.addItem(_get_chart_points(style)) + + def draw_curve( + self, + data: np.ndarray, + ) -> None: + # draw the indicator as a plain curve + curve = pg.PlotDataItem(data, antialias=True) + ind_chart.addItem(curve) + + def _update_yrange_limits(self): + """Callback for each y-range update. + + This adds auto-scaling like zoom on the scroll wheel such + that data always fits nicely inside the current view of the + data set. + """ + # TODO: this can likely be ported in part to the built-ins: + # self.setYRange(Quotes.low.min() * .98, Quotes.high.max() * 1.02) + # self.setMouseEnabled(x=True, y=False) + # self.setXRange(Quotes[0].id, Quotes[-1].id) + # self.setAutoVisible(x=False, y=True) + # self.enableAutoRange(x=False, y=True) + + chart = self + chart_parent = self.parent + + lbar, rbar = self.bars_range() + # vr = chart.viewRect() + # lbar, rbar = int(vr.left()), int(vr.right()) + + if chart_parent.signals_visible: + chart_parent._show_text_signals(lbar, rbar) + + bars = Quotes[lbar:rbar] + ylow = bars.low.min() * 0.98 + yhigh = bars.high.max() * 1.02 + + std = np.std(bars.close) + chart.setLimits(yMin=ylow, yMax=yhigh, minYRange=std) + chart.setYRange(ylow, yhigh) + + for i, d in chart_parent.indicators: + # ydata = i.plotItem.items[0].getData()[1] + ydata = d[lbar:rbar] + ylow = ydata.min() * 0.98 + yhigh = ydata.max() * 1.02 + std = np.std(ydata) + i.setLimits(yMin=ylow, yMax=yhigh, minYRange=std) + i.setYRange(ylow, yhigh) + + def enterEvent(self, ev): # noqa # pg.PlotWidget.enterEvent(self, ev) self.sig_mouse_enter.emit(self) @@ -525,7 +604,7 @@ class CrossHairItem(pg.GraphicsObject): evt_post=pos, point_view=mouse_point_ind ) else: - # vertial position of the mouse is inside and main chart + # vertial position of the mouse is inside the main chart self.hline.setY(mouse_point.y()) self.yaxis_label.update_label( evt_post=pos, point_view=mouse_point @@ -627,66 +706,6 @@ class CandlestickItem(BarItem): p.drawRects(*rects[Quotes.close < Quotes.open]) -def _configure_chart( - chart: ChartPlotWidget, -) -> None: - """Configure a chart with common settings. - """ - # show only right side axes - chart.hideAxis('left') - chart.showAxis('right') - - # highest = Quotes.high.max() * 1.02 - # lowest = Quotes.low.min() * 0.98 - - # set panning limits - chart.setLimits( - xMin=Quotes[0].id, - xMax=Quotes[-1].id, - minXRange=40, - # maxYRange=highest-lowest, - yMin=Quotes.low.min() * 0.98, - yMax=Quotes.high.max() * 1.02, - ) - # show background grid - chart.showGrid(x=True, y=True, alpha=0.4) - - # use cross-hair for cursor - chart.setCursor(QtCore.Qt.CrossCursor) - - -def _configure_quotes_chart( - chart: ChartPlotWidget, - style: ChartType = ChartType.BAR, -) -> None: - """Update and format a chart with quotes data. - """ - _configure_chart(chart) - - # adds all bar/candle graphics objects for each - # data point in the np array buffer to - # be drawn on next render cycle - chart.addItem(_get_chart_points(style)) - - -def _configure_ind_charts( - indicators: List[Tuple[ChartPlotWidget, np.ndarray]], - xlink_to_chart: ChartPlotWidget, -) -> None: - for ind_chart, d in indicators: - # link chart x-axis to main quotes chart - ind_chart.setXLink(xlink_to_chart) - - # default config - _configure_chart(ind_chart) - - curve = pg.PlotDataItem(d, pen='b', antialias=True) - ind_chart.addItem(curve) - - # XXX: never do this lol - # ind.setAspectLocked(1) - - class SplitterChart(QtGui.QWidget): long_pen = pg.mkPen('#006000') @@ -711,12 +730,12 @@ class SplitterChart(QtGui.QWidget): else: self.xaxis_ind.setStyle(showValues=False) - self.layout = QtGui.QVBoxLayout(self) - self.layout.setContentsMargins(0, 0, 0, 0) - self.splitter = QtGui.QSplitter(QtCore.Qt.Vertical) self.splitter.setHandleWidth(5) + self.layout = QtGui.QVBoxLayout(self) + self.layout.setContentsMargins(0, 0, 0, 0) + self.layout.addWidget(self.splitter) def _show_text_signals(self, lbar, rbar): @@ -749,6 +768,7 @@ class SplitterChart(QtGui.QWidget): def plot(self, symbol): self.digits = symbol.digits self.chart = ChartPlotWidget( + split_charts=self, parent=self.splitter, axisItems={'bottom': self.xaxis, 'right': PriceAxis()}, viewBox=ChartView, @@ -766,6 +786,7 @@ class SplitterChart(QtGui.QWidget): for d in inds: ind = ChartPlotWidget( + split_charts=self, parent=self.splitter, axisItems={'bottom': self.xaxis_ind, 'right': PriceAxis()}, # axisItems={'top': self.xaxis_ind, 'right': PriceAxis()}, @@ -778,13 +799,17 @@ class SplitterChart(QtGui.QWidget): # self.splitter.addWidget(ind) self.indicators.append((ind, d)) - _configure_quotes_chart( - self.chart, - ) - _configure_ind_charts( - self.indicators, - xlink_to_chart=self.chart - ) + self.chart.draw_ohlc() + + for ind_chart, d in self.indicators: + + # link chart x-axis to main quotes chart + ind_chart.setXLink(self.chart) + + # XXX: never do this lol + # ind.setAspectLocked(1) + ind_chart.draw_curve(d) + self._update_sizes() ch = CrossHairItem(