2013-12-22 07:08:39 +00:00
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from ..Qt import QtGui, QtCore
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from ..Point import Point
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from .GraphicsObject import GraphicsObject
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from .TextItem import TextItem
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from .ViewBox import ViewBox
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2013-12-22 07:08:39 +00:00
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from .. import functions as fn
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2012-03-02 02:55:32 +00:00
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import numpy as np
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import weakref
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__all__ = ['InfiniteLine']
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class InfiniteLine(GraphicsObject):
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"""
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**Bases:** :class:`GraphicsObject <pyqtgraph.GraphicsObject>`
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2012-03-02 02:55:32 +00:00
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Displays a line of infinite length.
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This line may be dragged to indicate a position in data coordinates.
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2012-04-25 17:12:40 +00:00
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=============================== ===================================================
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2014-02-12 20:25:31 +00:00
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**Signals:**
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2012-04-25 17:12:40 +00:00
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sigDragged(self)
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sigPositionChangeFinished(self)
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sigPositionChanged(self)
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=============================== ===================================================
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"""
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2012-03-02 02:55:32 +00:00
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sigDragged = QtCore.Signal(object)
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sigPositionChangeFinished = QtCore.Signal(object)
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sigPositionChanged = QtCore.Signal(object)
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def __init__(self, pos=None, angle=90, pen=None, movable=False, bounds=None,
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hoverPen=None, label=False, textColor=None, textFill=None,
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textLocation=[0.05,0.5], textFormat="{:.3f}",
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suffix=None, name='InfiniteLine'):
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"""
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=============== ==================================================================
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**Arguments:**
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pos Position of the line. This can be a QPointF or a single value for
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vertical/horizontal lines.
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angle Angle of line in degrees. 0 is horizontal, 90 is vertical.
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pen Pen to use when drawing line. Can be any arguments that are valid
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for :func:`mkPen <pyqtgraph.mkPen>`. Default pen is transparent
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yellow.
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movable If True, the line can be dragged to a new position by the user.
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hoverPen Pen to use when drawing line when hovering over it. Can be any
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arguments that are valid for :func:`mkPen <pyqtgraph.mkPen>`.
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Default pen is red.
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bounds Optional [min, max] bounding values. Bounds are only valid if the
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line is vertical or horizontal.
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label if True, a label is displayed next to the line to indicate its
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location in data coordinates
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textColor color of the label. Can be any argument fn.mkColor can understand.
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textFill A brush to use when filling within the border of the text.
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textLocation list where list[0] defines the location of the text (if
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vertical, a 0 value means that the textItem is on the bottom
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axis, and a 1 value means that thet TextItem is on the top
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axis, same thing if horizontal) and list[1] defines when the
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text shifts from one side to the other side of the line.
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textFormat Any new python 3 str.format() format.
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suffix If not None, corresponds to the unit to show next to the label
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name name of the item
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=============== ==================================================================
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"""
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GraphicsObject.__init__(self)
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if bounds is None: ## allowed value boundaries for orthogonal lines
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self.maxRange = [None, None]
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else:
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self.maxRange = bounds
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self.moving = False
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self.setMovable(movable)
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self.mouseHovering = False
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self.p = [0, 0]
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self.setAngle(angle)
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if textColor is None:
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textColor = (200, 200, 100)
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self.textColor = textColor
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self.textFill = textFill
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self.textLocation = textLocation
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self.suffix = suffix
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if (self.angle == 0 or self.angle == 90) and label:
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self.textItem = TextItem(fill=textFill)
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self.textItem.setParentItem(self)
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else:
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self.textItem = None
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self.anchorLeft = (1., 0.5)
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self.anchorRight = (0., 0.5)
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self.anchorUp = (0.5, 1.)
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self.anchorDown = (0.5, 0.)
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if pos is None:
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pos = Point(0,0)
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self.setPos(pos)
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if pen is None:
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pen = (200, 200, 100)
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self.setPen(pen)
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if hoverPen is None:
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self.setHoverPen(color=(255,0,0), width=self.pen.width())
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else:
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self.setHoverPen(hoverPen)
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self.currentPen = self.pen
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self.format = textFormat
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self._name = name
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# Cache complex value for drawing speed-up (#PR267)
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self._line = None
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self._boundingRect = None
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def setMovable(self, m):
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"""Set whether the line is movable by the user."""
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self.movable = m
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self.setAcceptHoverEvents(m)
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def setBounds(self, bounds):
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"""Set the (minimum, maximum) allowable values when dragging."""
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self.maxRange = bounds
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self.setValue(self.value())
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2014-02-28 21:16:13 +00:00
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def setPen(self, *args, **kwargs):
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"""Set the pen for drawing the line. Allowable arguments are any that are valid
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for :func:`mkPen <pyqtgraph.mkPen>`."""
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self.pen = fn.mkPen(*args, **kwargs)
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if not self.mouseHovering:
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self.currentPen = self.pen
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self.update()
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def setHoverPen(self, *args, **kwargs):
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"""Set the pen for drawing the line while the mouse hovers over it.
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Allowable arguments are any that are valid
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for :func:`mkPen <pyqtgraph.mkPen>`.
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2014-05-10 18:19:27 +00:00
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If the line is not movable, then hovering is also disabled.
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2014-05-10 18:19:27 +00:00
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Added in version 0.9.9."""
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self.hoverPen = fn.mkPen(*args, **kwargs)
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if self.mouseHovering:
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self.currentPen = self.hoverPen
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self.update()
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def setAngle(self, angle):
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"""
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Takes angle argument in degrees.
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0 is horizontal; 90 is vertical.
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Note that the use of value() and setValue() changes if the line is
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not vertical or horizontal.
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"""
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self.angle = ((angle+45) % 180) - 45 ## -45 <= angle < 135
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self.resetTransform()
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self.rotate(self.angle)
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self.update()
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def setPos(self, pos):
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if type(pos) in [list, tuple]:
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newPos = pos
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elif isinstance(pos, QtCore.QPointF):
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newPos = [pos.x(), pos.y()]
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else:
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if self.angle == 90:
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newPos = [pos, 0]
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elif self.angle == 0:
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newPos = [0, pos]
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else:
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raise Exception("Must specify 2D coordinate for non-orthogonal lines.")
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## check bounds (only works for orthogonal lines)
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if self.angle == 90:
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if self.maxRange[0] is not None:
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newPos[0] = max(newPos[0], self.maxRange[0])
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if self.maxRange[1] is not None:
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newPos[0] = min(newPos[0], self.maxRange[1])
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elif self.angle == 0:
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if self.maxRange[0] is not None:
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newPos[1] = max(newPos[1], self.maxRange[0])
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if self.maxRange[1] is not None:
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newPos[1] = min(newPos[1], self.maxRange[1])
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if self.p != newPos:
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self.p = newPos
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self._invalidateCache()
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GraphicsObject.setPos(self, Point(self.p))
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if self.textItem is not None and self.getViewBox() is not None and isinstance(self.getViewBox(), ViewBox):
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self.updateTextPosition()
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self.update()
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self.sigPositionChanged.emit(self)
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def updateTextPosition(self):
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"""
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Update the location of the textItem. Called only if a textItem is
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requested and if the item has already been added to a PlotItem.
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"""
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rangeX, rangeY = self.getViewBox().viewRange()
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xmin, xmax = rangeX
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ymin, ymax = rangeY
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if self.angle == 90: # vertical line
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diffMin = self.value()-xmin
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limInf = self.textLocation[1]*(xmax-xmin)
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ypos = ymin+self.textLocation[0]*(ymax-ymin)
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if diffMin < limInf:
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self.textItem.anchor = Point(self.anchorRight)
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else:
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self.textItem.anchor = Point(self.anchorLeft)
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fmt = " x = " + self.format
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if self.suffix is not None:
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fmt = fmt + self.suffix
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self.textItem.setText(fmt.format(self.value()), color=self.textColor)
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elif self.angle == 0: # horizontal line
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diffMin = self.value()-ymin
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limInf = self.textLocation[1]*(ymax-ymin)
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xpos = xmin+self.textLocation[0]*(xmax-xmin)
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if diffMin < limInf:
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self.textItem.anchor = Point(self.anchorUp)
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else:
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self.textItem.anchor = Point(self.anchorDown)
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fmt = " y = " + self.format
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if self.suffix is not None:
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fmt = fmt + self.suffix
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self.textItem.setText(fmt.format(self.value()), color=self.textColor)
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def getXPos(self):
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return self.p[0]
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def getYPos(self):
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return self.p[1]
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def getPos(self):
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return self.p
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def value(self):
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"""Return the value of the line. Will be a single number for horizontal and
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vertical lines, and a list of [x,y] values for diagonal lines."""
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if self.angle%180 == 0:
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return self.getYPos()
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elif self.angle%180 == 90:
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return self.getXPos()
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else:
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return self.getPos()
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def setValue(self, v):
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"""Set the position of the line. If line is horizontal or vertical, v can be
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a single value. Otherwise, a 2D coordinate must be specified (list, tuple and
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QPointF are all acceptable)."""
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self.setPos(v)
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## broken in 4.7
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#def itemChange(self, change, val):
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#if change in [self.ItemScenePositionHasChanged, self.ItemSceneHasChanged]:
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#self.updateLine()
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#print "update", change
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#print self.getBoundingParents()
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#else:
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#print "ignore", change
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#return GraphicsObject.itemChange(self, change, val)
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def _invalidateCache(self):
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self._line = None
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self._boundingRect = None
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def boundingRect(self):
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if self._boundingRect is None:
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#br = UIGraphicsItem.boundingRect(self)
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br = self.viewRect()
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## add a 4-pixel radius around the line for mouse interaction.
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px = self.pixelLength(direction=Point(1,0), ortho=True) ## get pixel length orthogonal to the line
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if px is None:
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px = 0
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w = (max(4, self.pen.width()/2, self.hoverPen.width()/2)+1) * px
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br.setBottom(-w)
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br.setTop(w)
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br = br.normalized()
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self._boundingRect = br
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self._line = QtCore.QLineF(br.right(), 0.0, br.left(), 0.0)
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return self._boundingRect
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def paint(self, p, *args):
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p.setPen(self.currentPen)
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2016-02-04 02:28:59 +00:00
|
|
|
p.drawLine(self._line)
|
2016-01-15 15:10:24 +00:00
|
|
|
|
2012-05-08 21:56:55 +00:00
|
|
|
def dataBounds(self, axis, frac=1.0, orthoRange=None):
|
2012-03-02 02:55:32 +00:00
|
|
|
if axis == 0:
|
|
|
|
return None ## x axis should never be auto-scaled
|
|
|
|
else:
|
|
|
|
return (0,0)
|
|
|
|
|
|
|
|
def mouseDragEvent(self, ev):
|
|
|
|
if self.movable and ev.button() == QtCore.Qt.LeftButton:
|
|
|
|
if ev.isStart():
|
|
|
|
self.moving = True
|
2016-02-03 11:52:01 +00:00
|
|
|
self.cursorOffset = self.pos() - self.mapToParent(ev.buttonDownPos())
|
|
|
|
self.startPosition = self.pos()
|
2012-03-02 02:55:32 +00:00
|
|
|
ev.accept()
|
2016-01-15 15:10:24 +00:00
|
|
|
|
2012-03-02 02:55:32 +00:00
|
|
|
if not self.moving:
|
|
|
|
return
|
2016-01-15 15:10:24 +00:00
|
|
|
|
2016-02-03 11:52:01 +00:00
|
|
|
self.setPos(self.cursorOffset + self.mapToParent(ev.pos()))
|
2012-03-02 02:55:32 +00:00
|
|
|
self.sigDragged.emit(self)
|
|
|
|
if ev.isFinish():
|
|
|
|
self.moving = False
|
|
|
|
self.sigPositionChangeFinished.emit(self)
|
2016-01-15 15:10:24 +00:00
|
|
|
|
2012-03-02 02:55:32 +00:00
|
|
|
def mouseClickEvent(self, ev):
|
|
|
|
if self.moving and ev.button() == QtCore.Qt.RightButton:
|
|
|
|
ev.accept()
|
|
|
|
self.setPos(self.startPosition)
|
|
|
|
self.moving = False
|
|
|
|
self.sigDragged.emit(self)
|
|
|
|
self.sigPositionChangeFinished.emit(self)
|
|
|
|
|
|
|
|
def hoverEvent(self, ev):
|
2012-04-03 05:01:33 +00:00
|
|
|
if (not ev.isExit()) and self.movable and ev.acceptDrags(QtCore.Qt.LeftButton):
|
2012-04-04 13:29:35 +00:00
|
|
|
self.setMouseHover(True)
|
|
|
|
else:
|
|
|
|
self.setMouseHover(False)
|
|
|
|
|
|
|
|
def setMouseHover(self, hover):
|
2014-05-10 18:19:27 +00:00
|
|
|
## Inform the item that the mouse is (not) hovering over it
|
2012-04-04 13:29:35 +00:00
|
|
|
if self.mouseHovering == hover:
|
|
|
|
return
|
|
|
|
self.mouseHovering = hover
|
|
|
|
if hover:
|
2014-05-10 18:19:27 +00:00
|
|
|
self.currentPen = self.hoverPen
|
2012-03-02 02:55:32 +00:00
|
|
|
else:
|
|
|
|
self.currentPen = self.pen
|
|
|
|
self.update()
|
2016-01-15 15:10:24 +00:00
|
|
|
|
2016-02-03 11:52:01 +00:00
|
|
|
def viewTransformChanged(self):
|
|
|
|
"""
|
|
|
|
Called whenever the transformation matrix of the view has changed.
|
|
|
|
(eg, the view range has changed or the view was resized)
|
|
|
|
"""
|
2016-02-04 02:28:59 +00:00
|
|
|
self._invalidateCache()
|
|
|
|
|
2016-02-03 11:52:01 +00:00
|
|
|
if self.getViewBox() is not None and isinstance(self.getViewBox(), ViewBox) and self.textItem is not None:
|
|
|
|
self.updateTextPosition()
|
2016-01-15 15:10:24 +00:00
|
|
|
|
|
|
|
def showLabel(self, state):
|
|
|
|
"""
|
|
|
|
Display or not the label indicating the location of the line in data
|
|
|
|
coordinates.
|
|
|
|
|
2016-02-05 10:54:00 +00:00
|
|
|
============== ======================================================
|
2016-01-15 15:10:24 +00:00
|
|
|
**Arguments:**
|
|
|
|
state If True, the label is shown. Otherwise, it is hidden.
|
2016-02-05 10:54:00 +00:00
|
|
|
============== ======================================================
|
2016-01-15 15:10:24 +00:00
|
|
|
"""
|
|
|
|
if state:
|
2016-02-03 11:52:01 +00:00
|
|
|
self.textItem = TextItem(fill=self.textFill)
|
|
|
|
self.textItem.setParentItem(self)
|
|
|
|
self.viewTransformChanged()
|
2016-01-15 15:10:24 +00:00
|
|
|
else:
|
2016-02-03 11:52:01 +00:00
|
|
|
self.textItem = None
|
2016-01-15 15:10:24 +00:00
|
|
|
|
|
|
|
|
2016-02-03 11:52:01 +00:00
|
|
|
def setTextLocation(self, loc):
|
2016-01-15 15:10:24 +00:00
|
|
|
"""
|
2016-02-03 11:52:01 +00:00
|
|
|
Set the parameters that defines the location of the textItem with respect
|
|
|
|
to a specific axis. If the line is vertical, the location is based on the
|
|
|
|
normalized range of the yaxis. Otherwise, it is based on the normalized
|
|
|
|
range of the xaxis.
|
|
|
|
loc[0] defines the location of the text along the infiniteLine
|
|
|
|
loc[1] defines the location when the label shifts from one side of then
|
|
|
|
infiniteLine to the other.
|
2016-01-15 15:10:24 +00:00
|
|
|
"""
|
2016-02-03 11:52:01 +00:00
|
|
|
self.textLocation = [np.clip(loc[0], 0, 1), np.clip(loc[1], 0, 1)]
|
2016-01-15 15:10:24 +00:00
|
|
|
self.update()
|
|
|
|
|
|
|
|
def setName(self, name):
|
|
|
|
self._name = name
|
|
|
|
|
|
|
|
def name(self):
|
|
|
|
return self._name
|