Extend level line interaction
Support tracking the mouse cursor using a new `on_tracked_sources()` callback method. Make hovered highlight a bit thicker and highlight when click-dragged. Add a delete method for removing from the scene along with label.basic_alerts
Tyler Goodlet
parent
edbbcbf954
commit
14dad08d98
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@ -33,8 +33,6 @@ from .._axes import YSticky
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class LevelLabel(YSticky):
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line_pen = pg.mkPen(hcolor('bracket'))
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_w_margin = 4
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_h_margin = 3
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level: float = 0
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@ -43,13 +41,15 @@ class LevelLabel(YSticky):
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self,
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chart,
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*args,
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color: str = 'bracket',
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orient_v: str = 'bottom',
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orient_h: str = 'left',
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**kwargs
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) -> None:
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super().__init__(chart, *args, **kwargs)
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self._pen = self.line_pen
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# TODO: this is kinda cludgy
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self._pen = self.pen = pg.mkPen(hcolor(color))
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# orientation around axis options
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self._orient_v = orient_v
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@ -77,7 +77,7 @@ class LevelLabel(YSticky):
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br = self.boundingRect()
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h, w = br.height(), br.width()
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# this triggers ``.pain()`` implicitly?
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# this triggers ``.paint()`` implicitly?
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self.setPos(QPointF(
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self._h_shift * w - offset,
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abs_pos.y() - (self._v_shift * h) - offset
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@ -118,11 +118,10 @@ class LevelLabel(YSticky):
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self.update()
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def unhighlight(self):
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self._pen = self.line_pen
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self._pen = self.pen
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self.update()
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class L1Label(LevelLabel):
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size: float = 0
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@ -192,52 +191,124 @@ class L1Labels:
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class LevelLine(pg.InfiniteLine):
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# TODO: fill in these slots for orders
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# .sigPositionChangeFinished.emit(self)
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def __init__(
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self,
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chart: 'ChartPlotWidget', # type: ignore # noqa
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label: LevelLabel,
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highlight_color: str = 'default_light',
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**kwargs,
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) -> None:
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self.label = label
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super().__init__(**kwargs)
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self.sigPositionChanged.connect(self.set_level)
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self._chart = chart
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# use slightly thicker highlight
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self.setHoverPen(
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color=(255, 0, 0),
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width=self.pen.width() + 1
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)
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pen = pg.mkPen(hcolor(highlight_color))
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pen.setWidth(2)
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self.setHoverPen(pen)
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self._track_cursor: bool = False
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def set_level(self, value: float) -> None:
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self.label.update_from_data(0, self.value())
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def on_tracked_source(
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self,
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x: int,
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y: float
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) -> None:
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self.movable = True
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self.setPos(y) # implictly calls ``.set_level()``
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self.update()
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def setMouseHover(self, hover: bool) -> None:
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"""Mouse hover callback.
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"""
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if self.mouseHovering == hover:
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return
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self.mouseHovering = hover
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chart = self._chart
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if hover:
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self.currentPen = self.hoverPen
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self.label.highlight(self.hoverPen)
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# add us to cursor state
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chart._cursor.add_hovered(self)
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# # hide y-crosshair
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# chart._cursor.graphics[chart]['hl'].hide()
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else:
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self.currentPen = self.pen
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self.label.unhighlight()
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chart._cursor._hovered.remove(self)
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# highlight any attached label
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# self.setCursor(QtCore.Qt.OpenHandCursor)
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# self.setCursor(QtCore.Qt.DragMoveCursor)
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self.update()
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def mouseDragEvent(self, ev):
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chart = self._chart
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# hide y-crosshair
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chart._cursor.graphics[chart]['hl'].hide()
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# highlight
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self.currentPen = self.hoverPen
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self.label.highlight(self.hoverPen)
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# normal tracking behavior
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super().mouseDragEvent(ev)
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# This is the final position in the drag
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if ev.isFinish():
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# show y-crosshair again
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chart = self._chart
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chart._cursor.graphics[chart]['hl'].show()
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def mouseDoubleClickEvent(
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self,
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ev: QtGui.QMouseEvent,
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) -> None:
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print(f'double click {ev}')
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# def mouseMoved(
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# self,
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# ev: Tuple[QtGui.QMouseEvent],
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# ) -> None:
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# pos = evt[0]
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# print(pos)
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def delete(self) -> None:
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"""Remove this line from containing chart/view/scene.
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"""
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scene = self.scene()
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if scene:
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# self.label.parent.scene().removeItem(self.label)
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scene.removeItem(self.label)
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self._chart.plotItem.removeItem(self)
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def level_line(
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chart: 'ChartPlogWidget', # noqa
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level: float,
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digits: int = 1,
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color: str = 'default',
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# size 4 font on 4k screen scaled down, so small-ish.
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font_size_inches: float = _down_2_font_inches_we_like,
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@ -254,11 +325,13 @@ def level_line(
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parent=chart.getAxis('right'),
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# TODO: pass this from symbol data
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digits=digits,
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opacity=1,
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opacity=0.666,
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font_size_inches=font_size_inches,
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color=color,
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# TODO: make this take the view's bg pen
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bg_color='papas_special',
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fg_color='default',
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fg_color=color,
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**linelabelkwargs
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)
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label.update_from_data(0, level)
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@ -267,12 +340,16 @@ def level_line(
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label._size_br_from_str(label.label_str)
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line = LevelLine(
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chart,
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label,
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# lookup "highlight" equivalent
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highlight_color=color + '_light',
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movable=True,
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angle=0,
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)
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line.setValue(level)
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line.setPen(pg.mkPen(hcolor('default')))
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line.setPen(pg.mkPen(hcolor(color)))
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# activate/draw label
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line.setValue(level)
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