bottom viewbox on PlotWidget and legend issues

[dhabbyc]

Hello,

 I have a PlotWidget on which I have added a ViewBox instance on the bottom of the layout. The idea is to place the legend there.

 So far I have two issues:

1. The legend box doesnt fit the viewbox height... No matter what I do... I've tried to force the box size, to set manually the widget geometry and nothing works...
2. I havent been able to "center" the legend below the main plot. When I try to manually set the position of it (setPos) i cant compute correctly the appropiate coordinates. If I use the viewbox center minus the coordinates of the center of the legend, the result is biased to the left.

Here is an example of what I'm doing:

import pyqtgraph as pg

from pyqtgraph.Qt import QtCore, QtGui

import numpy as np

app = QtGui.QApplication([])

mw = QtGui.QMainWindow()

cw = QtGui.QWidget()

mw.setCentralWidget(cw)

l = QtGui.QVBoxLayout()

cw.setLayout(l)

pw = pg.PlotWidget(name='Plot1')

l.addWidget(pw)

vb = pg.ViewBox(parent = pw.plotItem)

pw.plotItem.layout.addItem(vb, 4, 1, 1, 4)

lg = pg.LegendItem()

lg.setParentItem(vb)

curve = pg.PlotCurveItem(y = np.random.normal(size=100)*1e0)

pw.plotItem.addItem(curve)

lg.addItem(curve, 'test')

mw.show()

if __name__ == '__main__':

    import sys

    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):

        QtGui.QApplication.instance().exec_()  

 Thanks in advance.

D.