I figured out how to do this. I wrote a new class inheriting the
LegendItem class and overriding two functions. in paint() I changed
color/opacity of the background and boarder and in addItem() I changed the
label color to change the font color.
Then to add to plot use:
self.legend1 = myLegend(offset=(-100,50))
self.legend1.setParentItem(self.plt1.graphicsItem())
Where self.plt1 is a plotWidget
Here is the code:
from pyqtgraph import LegendItem, PlotDataItem, ScatterPlotItem, LabelItem
from pyqtgraph.Qt import QtCore, QtGui
from pyqtgraph.graphicsItems.ScatterPlotItem import drawSymbol
from pyqtgraph.graphicsItems.LegendItem import ItemSample
import pyqtgraph.functions as fn
class myLegend(LegendItem):
def __init__(self, size=None, offset=None):
LegendItem.__init__(self, size, offset)
def paint(self, p, *args):
p.setPen(fn.mkPen(0,0,0)) # outline
p.setBrush(fn.mkBrush(255,255,255)) # background
p.drawRect(self.boundingRect())
def addItem(self, item, name):
"""
Add a new entry to the legend.
============== ========================================================
**Arguments:**
item A PlotDataItem from which the line and point style
of the item will be determined or an instance of
ItemSample (or a subclass), allowing the item display
to be customized.
title The title to display for this item. Simple HTML allowed.
============== ========================================================
"""
label = LabelItem(name, color=(0,0,0))
if isinstance(item, ItemSample):
sample = item
else:
sample = ItemSample(item)
row = self.layout.rowCount()
self.items.append((sample, label))
self.layout.addItem(sample, row, 0)
self.layout.addItem(label, row, 1)
self.updateSize()
On Monday, July 17, 2017 at 3:04:37 PM UTC-6, Patrick Kreitzberg wrote:
>
> Hi,
>
> I want to change the plot legend to have a solid white background, is this
> possible?
>
> Thanks
>
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