avoid double call to mkPen when creating PlotCurveItem objects (#817)
* avoid double call to mkPen when creating PlotCurveItem objects * avoid unnecessary calls to mkPen in paint
This commit is contained in:
Daniel Hrisca
Ogi Moore
parent
3e7cace746
commit
297e1d95a5
@ -4,7 +4,7 @@ try:
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HAVE_OPENGL = True
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except:
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HAVE_OPENGL = False
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import numpy as np
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from .GraphicsObject import GraphicsObject
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from .. import functions as fn
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@ -15,51 +15,50 @@ from .. import debug
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__all__ = ['PlotCurveItem']
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class PlotCurveItem(GraphicsObject):
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"""
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Class representing a single plot curve. Instances of this class are created
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automatically as part of PlotDataItem; these rarely need to be instantiated
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directly.
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Features:
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- Fast data update
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- Fill under curve
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- Mouse interaction
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==================== ===============================================
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**Signals:**
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sigPlotChanged(self) Emitted when the data being plotted has changed
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sigClicked(self) Emitted when the curve is clicked
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==================== ===============================================
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"""
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sigPlotChanged = QtCore.Signal(object)
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sigClicked = QtCore.Signal(object)
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def __init__(self, *args, **kargs):
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"""
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Forwards all arguments to :func:`setData <pyqtgraph.PlotCurveItem.setData>`.
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Some extra arguments are accepted as well:
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============== =======================================================
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**Arguments:**
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parent The parent GraphicsObject (optional)
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clickable If True, the item will emit sigClicked when it is
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clickable If True, the item will emit sigClicked when it is
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clicked on. Defaults to False.
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============== =======================================================
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"""
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GraphicsObject.__init__(self, kargs.get('parent', None))
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self.clear()
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## this is disastrous for performance.
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#self.setCacheMode(QtGui.QGraphicsItem.DeviceCoordinateCache)
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self.metaData = {}
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self.opts = {
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'pen': fn.mkPen('w'),
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'shadowPen': None,
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'fillLevel': None,
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'brush': None,
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@ -70,21 +69,23 @@ class PlotCurveItem(GraphicsObject):
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'mouseWidth': 8, # width of shape responding to mouse click
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'compositionMode': None,
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}
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if 'pen' not in kargs:
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self.opts['pen'] = fn.mkPen('w')
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self.setClickable(kargs.get('clickable', False))
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self.setData(*args, **kargs)
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def implements(self, interface=None):
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ints = ['plotData']
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if interface is None:
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return ints
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return interface in ints
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def name(self):
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return self.opts.get('name', None)
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def setClickable(self, s, width=None):
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"""Sets whether the item responds to mouse clicks.
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The *width* argument specifies the width in pixels orthogonal to the
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curve that will respond to a mouse click.
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"""
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@ -92,41 +93,41 @@ class PlotCurveItem(GraphicsObject):
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if width is not None:
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self.opts['mouseWidth'] = width
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self._mouseShape = None
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self._boundingRect = None
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self._boundingRect = None
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def setCompositionMode(self, mode):
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"""Change the composition mode of the item (see QPainter::CompositionMode
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in the Qt documentation). This is useful when overlaying multiple items.
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============================================ ============================================================
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**Most common arguments:**
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QtGui.QPainter.CompositionMode_SourceOver Default; image replaces the background if it
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is opaque. Otherwise, it uses the alpha channel to blend
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the image with the background.
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QtGui.QPainter.CompositionMode_Overlay The image color is mixed with the background color to
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QtGui.QPainter.CompositionMode_Overlay The image color is mixed with the background color to
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reflect the lightness or darkness of the background.
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QtGui.QPainter.CompositionMode_Plus Both the alpha and color of the image and background pixels
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QtGui.QPainter.CompositionMode_Plus Both the alpha and color of the image and background pixels
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are added together.
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QtGui.QPainter.CompositionMode_Multiply The output is the image color multiplied by the background.
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============================================ ============================================================
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"""
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self.opts['compositionMode'] = mode
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self.update()
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def getData(self):
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return self.xData, self.yData
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def dataBounds(self, ax, frac=1.0, orthoRange=None):
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## Need this to run as fast as possible.
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## check cache first:
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cache = self._boundsCache[ax]
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if cache is not None and cache[0] == (frac, orthoRange):
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return cache[1]
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(x, y) = self.getData()
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if x is None or len(x) == 0:
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return (None, None)
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if ax == 0:
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d = x
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d2 = y
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@ -139,7 +140,7 @@ class PlotCurveItem(GraphicsObject):
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mask = (d2 >= orthoRange[0]) * (d2 <= orthoRange[1])
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d = d[mask]
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#d2 = d2[mask]
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if len(d) == 0:
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return (None, None)
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@ -154,7 +155,7 @@ class PlotCurveItem(GraphicsObject):
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if len(d) == 0:
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return (None, None)
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b = (d.min(), d.max())
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elif frac <= 0.0:
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raise Exception("Value for parameter 'frac' must be > 0. (got %s)" % str(frac))
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else:
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@ -166,7 +167,7 @@ class PlotCurveItem(GraphicsObject):
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## adjust for fill level
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if ax == 1 and self.opts['fillLevel'] is not None:
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b = (min(b[0], self.opts['fillLevel']), max(b[1], self.opts['fillLevel']))
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## Add pen width only if it is non-cosmetic.
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pen = self.opts['pen']
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spen = self.opts['shadowPen']
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@ -174,10 +175,10 @@ class PlotCurveItem(GraphicsObject):
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b = (b[0] - pen.widthF()*0.7072, b[1] + pen.widthF()*0.7072)
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if spen is not None and not spen.isCosmetic() and spen.style() != QtCore.Qt.NoPen:
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b = (b[0] - spen.widthF()*0.7072, b[1] + spen.widthF()*0.7072)
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self._boundsCache[ax] = [(frac, orthoRange), b]
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return b
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def pixelPadding(self):
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pen = self.opts['pen']
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spen = self.opts['shadowPen']
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@ -196,11 +197,11 @@ class PlotCurveItem(GraphicsObject):
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(ymn, ymx) = self.dataBounds(ax=1)
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if xmn is None or ymn is None:
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return QtCore.QRectF()
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px = py = 0.0
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pxPad = self.pixelPadding()
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if pxPad > 0:
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# determine length of pixel in local x, y directions
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# determine length of pixel in local x, y directions
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px, py = self.pixelVectors()
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try:
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px = 0 if px is None else px.length()
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@ -210,68 +211,68 @@ class PlotCurveItem(GraphicsObject):
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py = 0 if py is None else py.length()
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except OverflowError:
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py = 0
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# return bounds expanded by pixel size
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px *= pxPad
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py *= pxPad
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#px += self._maxSpotWidth * 0.5
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#py += self._maxSpotWidth * 0.5
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self._boundingRect = QtCore.QRectF(xmn-px, ymn-py, (2*px)+xmx-xmn, (2*py)+ymx-ymn)
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return self._boundingRect
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def viewTransformChanged(self):
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self.invalidateBounds()
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self.prepareGeometryChange()
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#def boundingRect(self):
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#if self._boundingRect is None:
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#(x, y) = self.getData()
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#if x is None or y is None or len(x) == 0 or len(y) == 0:
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#return QtCore.QRectF()
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#if self.opts['shadowPen'] is not None:
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#lineWidth = (max(self.opts['pen'].width(), self.opts['shadowPen'].width()) + 1)
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#else:
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#lineWidth = (self.opts['pen'].width()+1)
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#pixels = self.pixelVectors()
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#if pixels == (None, None):
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#pixels = [Point(0,0), Point(0,0)]
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#xmin = x.min()
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#xmax = x.max()
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#ymin = y.min()
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#ymax = y.max()
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#if self.opts['fillLevel'] is not None:
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#ymin = min(ymin, self.opts['fillLevel'])
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#ymax = max(ymax, self.opts['fillLevel'])
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#xmin -= pixels[0].x() * lineWidth
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#xmax += pixels[0].x() * lineWidth
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#ymin -= abs(pixels[1].y()) * lineWidth
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#ymax += abs(pixels[1].y()) * lineWidth
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#self._boundingRect = QtCore.QRectF(xmin, ymin, xmax-xmin, ymax-ymin)
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#return self._boundingRect
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def invalidateBounds(self):
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self._boundingRect = None
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self._boundsCache = [None, None]
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def setPen(self, *args, **kargs):
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"""Set the pen used to draw the curve."""
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self.opts['pen'] = fn.mkPen(*args, **kargs)
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self.invalidateBounds()
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self.update()
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def setShadowPen(self, *args, **kargs):
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"""Set the shadow pen used to draw behind tyhe primary pen.
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This pen must have a larger width than the primary
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This pen must have a larger width than the primary
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pen to be visible.
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"""
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self.opts['shadowPen'] = fn.mkPen(*args, **kargs)
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@ -283,7 +284,7 @@ class PlotCurveItem(GraphicsObject):
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self.opts['brush'] = fn.mkBrush(*args, **kargs)
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self.invalidateBounds()
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self.update()
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def setFillLevel(self, level):
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"""Set the level filled to when filling under the curve"""
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self.opts['fillLevel'] = level
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@ -295,11 +296,11 @@ class PlotCurveItem(GraphicsObject):
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"""
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=============== ========================================================
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**Arguments:**
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x, y (numpy arrays) Data to show
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x, y (numpy arrays) Data to show
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pen Pen to use when drawing. Any single argument accepted by
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:func:`mkPen <pyqtgraph.mkPen>` is allowed.
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shadowPen Pen for drawing behind the primary pen. Usually this
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is used to emphasize the curve by providing a
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is used to emphasize the curve by providing a
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high-contrast border. Any single argument accepted by
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:func:`mkPen <pyqtgraph.mkPen>` is allowed.
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fillLevel (float or None) Fill the area 'under' the curve to
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@ -317,18 +318,18 @@ class PlotCurveItem(GraphicsObject):
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to be drawn. "finite" causes segments to be omitted if
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they are attached to nan or inf values. For any other
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connectivity, specify an array of boolean values.
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compositionMode See :func:`setCompositionMode
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compositionMode See :func:`setCompositionMode
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<pyqtgraph.PlotCurveItem.setCompositionMode>`.
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=============== ========================================================
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If non-keyword arguments are used, they will be interpreted as
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setData(y) for a single argument and setData(x, y) for two
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arguments.
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"""
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self.updateData(*args, **kargs)
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def updateData(self, *args, **kargs):
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profiler = debug.Profiler()
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@ -340,12 +341,12 @@ class PlotCurveItem(GraphicsObject):
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elif len(args) == 2:
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kargs['x'] = args[0]
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kargs['y'] = args[1]
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if 'y' not in kargs or kargs['y'] is None:
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kargs['y'] = np.array([])
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if 'x' not in kargs or kargs['x'] is None:
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kargs['x'] = np.arange(len(kargs['y']))
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for k in ['x', 'y']:
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data = kargs[k]
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if isinstance(data, list):
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@ -355,9 +356,9 @@ class PlotCurveItem(GraphicsObject):
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raise Exception("Plot data must be 1D ndarray.")
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if 'complex' in str(data.dtype):
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raise Exception("Can not plot complex data types.")
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profiler("data checks")
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#self.setCacheMode(QtGui.QGraphicsItem.NoCache) ## Disabling and re-enabling the cache works around a bug in Qt 4.6 causing the cached results to display incorrectly
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## Test this bug with test_PlotWidget and zoom in on the animated plot
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self.invalidateBounds()
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@ -365,24 +366,24 @@ class PlotCurveItem(GraphicsObject):
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self.informViewBoundsChanged()
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self.yData = kargs['y'].view(np.ndarray)
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self.xData = kargs['x'].view(np.ndarray)
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profiler('copy')
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if 'stepMode' in kargs:
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self.opts['stepMode'] = kargs['stepMode']
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if self.opts['stepMode'] is True:
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if len(self.xData) != len(self.yData)+1: ## allow difference of 1 for step mode plots
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raise Exception("len(X) must be len(Y)+1 since stepMode=True (got %s and %s)" % (self.xData.shape, self.yData.shape))
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else:
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if self.xData.shape != self.yData.shape: ## allow difference of 1 for step mode plots
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raise Exception("X and Y arrays must be the same shape--got %s and %s." % (self.xData.shape, self.yData.shape))
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self.path = None
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self.fillPath = None
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self._mouseShape = None
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#self.xDisp = self.yDisp = None
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if 'name' in kargs:
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self.opts['name'] = kargs['name']
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if 'connect' in kargs:
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@ -397,14 +398,14 @@ class PlotCurveItem(GraphicsObject):
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self.setBrush(kargs['brush'])
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if 'antialias' in kargs:
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self.opts['antialias'] = kargs['antialias']
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profiler('set')
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self.update()
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profiler('update')
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self.sigPlotChanged.emit(self)
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profiler('emit')
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def generatePath(self, x, y):
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if self.opts['stepMode']:
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## each value in the x/y arrays generates 2 points.
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@ -423,9 +424,9 @@ class PlotCurveItem(GraphicsObject):
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y = y2.reshape(y2.size)[1:-1]
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y[0] = self.opts['fillLevel']
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y[-1] = self.opts['fillLevel']
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path = fn.arrayToQPath(x, y, connect=self.opts['connect'])
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return path
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@ -438,7 +439,7 @@ class PlotCurveItem(GraphicsObject):
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self.path = self.generatePath(*self.getData())
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self.fillPath = None
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self._mouseShape = None
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return self.path
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@debug.warnOnException ## raising an exception here causes crash
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@ -446,27 +447,27 @@ class PlotCurveItem(GraphicsObject):
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profiler = debug.Profiler()
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if self.xData is None or len(self.xData) == 0:
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return
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if HAVE_OPENGL and getConfigOption('enableExperimental') and isinstance(widget, QtOpenGL.QGLWidget):
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self.paintGL(p, opt, widget)
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return
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x = None
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y = None
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path = self.getPath()
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profiler('generate path')
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if self._exportOpts is not False:
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aa = self._exportOpts.get('antialias', True)
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else:
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aa = self.opts['antialias']
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p.setRenderHint(p.Antialiasing, aa)
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cmode = self.opts['compositionMode']
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if cmode is not None:
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p.setCompositionMode(cmode)
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if self.opts['brush'] is not None and self.opts['fillLevel'] is not None:
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if self.fillPath is None:
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if x is None:
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@ -477,14 +478,14 @@ class PlotCurveItem(GraphicsObject):
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p2.lineTo(x[0], y[0])
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p2.closeSubpath()
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self.fillPath = p2
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profiler('generate fill path')
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p.fillPath(self.fillPath, self.opts['brush'])
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profiler('draw fill path')
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sp = fn.mkPen(self.opts['shadowPen'])
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cp = fn.mkPen(self.opts['pen'])
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sp = self.opts['shadowPen']
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cp = self.opts['pen']
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## Copy pens and apply alpha adjustment
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#sp = QtGui.QPen(self.opts['shadowPen'])
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#cp = QtGui.QPen(self.opts['pen'])
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@ -495,9 +496,7 @@ class PlotCurveItem(GraphicsObject):
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#c.setAlpha(c.alpha() * self.opts['alphaHint'])
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#pen.setColor(c)
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##pen.setCosmetic(True)
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if sp is not None and sp.style() != QtCore.Qt.NoPen:
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p.setPen(sp)
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p.drawPath(path)
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@ -507,29 +506,29 @@ class PlotCurveItem(GraphicsObject):
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else:
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p.drawPath(path)
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profiler('drawPath')
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#print "Render hints:", int(p.renderHints())
|
||||
#p.setPen(QtGui.QPen(QtGui.QColor(255,0,0)))
|
||||
#p.drawRect(self.boundingRect())
|
||||
|
||||
|
||||
def paintGL(self, p, opt, widget):
|
||||
p.beginNativePainting()
|
||||
import OpenGL.GL as gl
|
||||
|
||||
|
||||
## set clipping viewport
|
||||
view = self.getViewBox()
|
||||
if view is not None:
|
||||
rect = view.mapRectToItem(self, view.boundingRect())
|
||||
#gl.glViewport(int(rect.x()), int(rect.y()), int(rect.width()), int(rect.height()))
|
||||
|
||||
|
||||
#gl.glTranslate(-rect.x(), -rect.y(), 0)
|
||||
|
||||
|
||||
gl.glEnable(gl.GL_STENCIL_TEST)
|
||||
gl.glColorMask(gl.GL_FALSE, gl.GL_FALSE, gl.GL_FALSE, gl.GL_FALSE) # disable drawing to frame buffer
|
||||
gl.glDepthMask(gl.GL_FALSE) # disable drawing to depth buffer
|
||||
gl.glStencilFunc(gl.GL_NEVER, 1, 0xFF)
|
||||
gl.glStencilOp(gl.GL_REPLACE, gl.GL_KEEP, gl.GL_KEEP)
|
||||
|
||||
gl.glStencilFunc(gl.GL_NEVER, 1, 0xFF)
|
||||
gl.glStencilOp(gl.GL_REPLACE, gl.GL_KEEP, gl.GL_KEEP)
|
||||
|
||||
## draw stencil pattern
|
||||
gl.glStencilMask(0xFF)
|
||||
gl.glClear(gl.GL_STENCIL_BUFFER_BIT)
|
||||
@ -541,12 +540,12 @@ class PlotCurveItem(GraphicsObject):
|
||||
gl.glVertex2f(rect.x()+rect.width(), rect.y())
|
||||
gl.glVertex2f(rect.x(), rect.y()+rect.height())
|
||||
gl.glEnd()
|
||||
|
||||
|
||||
gl.glColorMask(gl.GL_TRUE, gl.GL_TRUE, gl.GL_TRUE, gl.GL_TRUE)
|
||||
gl.glDepthMask(gl.GL_TRUE)
|
||||
gl.glStencilMask(0x00)
|
||||
gl.glStencilFunc(gl.GL_EQUAL, 1, 0xFF)
|
||||
|
||||
|
||||
try:
|
||||
x, y = self.getData()
|
||||
pos = np.empty((len(x), 2))
|
||||
@ -571,7 +570,7 @@ class PlotCurveItem(GraphicsObject):
|
||||
gl.glDisableClientState(gl.GL_VERTEX_ARRAY)
|
||||
finally:
|
||||
p.endNativePainting()
|
||||
|
||||
|
||||
def clear(self):
|
||||
self.xData = None ## raw values
|
||||
self.yData = None
|
||||
@ -587,7 +586,7 @@ class PlotCurveItem(GraphicsObject):
|
||||
def mouseShape(self):
|
||||
"""
|
||||
Return a QPainterPath representing the clickable shape of the curve
|
||||
|
||||
|
||||
"""
|
||||
if self._mouseShape is None:
|
||||
view = self.getViewBox()
|
||||
@ -600,14 +599,14 @@ class PlotCurveItem(GraphicsObject):
|
||||
mousePath = stroker.createStroke(path)
|
||||
self._mouseShape = self.mapFromItem(view, mousePath)
|
||||
return self._mouseShape
|
||||
|
||||
|
||||
def mouseClickEvent(self, ev):
|
||||
if not self.clickable or ev.button() != QtCore.Qt.LeftButton:
|
||||
return
|
||||
if self.mouseShape().contains(ev.pos()):
|
||||
ev.accept()
|
||||
self.sigClicked.emit(self)
|
||||
|
||||
|
||||
|
||||
|
||||
class ROIPlotItem(PlotCurveItem):
|
||||
@ -622,7 +621,7 @@ class ROIPlotItem(PlotCurveItem):
|
||||
#roi.connect(roi, QtCore.SIGNAL('regionChanged'), self.roiChangedEvent)
|
||||
roi.sigRegionChanged.connect(self.roiChangedEvent)
|
||||
#self.roiChangedEvent()
|
||||
|
||||
|
||||
def getRoiData(self):
|
||||
d = self.roi.getArrayRegion(self.roiData, self.roiImg, axes=self.axes)
|
||||
if d is None:
|
||||
@ -630,7 +629,7 @@ class ROIPlotItem(PlotCurveItem):
|
||||
while d.ndim > 1:
|
||||
d = d.mean(axis=1)
|
||||
return d
|
||||
|
||||
|
||||
def roiChangedEvent(self):
|
||||
d = self.getRoiData()
|
||||
self.updateData(d, self.xVals)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user