Unable to select range in CurveWidget

[qusuda]

When embedding CurveWidget in to a QT window i am not able to select ranges.

If initiated as standalone dialog it work as expected

from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout
from guiqwt.plot import CurveWidget
from guiqwt.builder import make
import numpy as np

app = QApplication([])
window = QWidget()
layout = QVBoxLayout()
cw = CurveWidget()
cw.parent = layout
layout.addWidget(cw)
window.setLayout(layout)

x = np.zeros(500)
y = np.zeros(len(x))

for i in range(0, 500):
    x[i] = i
    y[i] = np.random.randint(500)

curve = make.curve(x, y, "test")
range1 = make.range(x[200], x[300])
disp0 = make.range_info_label(range1, 'TR', "x = %.1f + %.1f ms", lambda x, dx: ((x-dx), (2*dx)), title="Selected range")

disp2 = make.computations(range1, "TL",
                            [
                            (curve, "min=%.3f mA", lambda x, y: y.min()),
                            (curve, "max=%.3f mA", lambda x, y: y.max()),
                            (curve, "avg=%.3f mA", lambda x, y: y.mean())
                            ],
                            title="Measurements")
cw.plot.add_item(curve)
cw.plot.add_item(disp0)
cw.plot.add_item(disp2)
cw.plot.add_item(range1)
window.show()
app.exec_()

[PierreRaybaut]

Just add:

cw.register_all_curve_tools()

after cw = CurveWidget().

And add curve item specifying z to ensure it's in background:

cw.plot.add_item(curve, z=-1)

So, the full working code is the following:

from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout
from guiqwt.plot import CurveWidget
from guiqwt.builder import make
import numpy as np

app = QApplication([])
window = QWidget()
layout = QVBoxLayout()
cw = CurveWidget()
cw.register_all_curve_tools()
cw.parent = layout
layout.addWidget(cw)
window.setLayout(layout)

x = np.zeros(500)
y = np.zeros(len(x))

for i in range(0, 500):
    x[i] = i
    y[i] = np.random.randint(500)

curve = make.curve(x, y, "test")
range1 = make.range(x[200], x[300])
disp0 = make.range_info_label(
    range1,
    "TR",
    "x = %.1f + %.1f ms",
    lambda x, dx: ((x - dx), (2 * dx)),
    title="Selected range",
)

disp2 = make.computations(
    range1,
    "TL",
    [
        (curve, "min=%.3f mA", lambda x, y: y.min()),
        (curve, "max=%.3f mA", lambda x, y: y.max()),
        (curve, "avg=%.3f mA", lambda x, y: y.mean()),
    ],
    title="Measurements",
)
cw.plot.add_item(curve, z=-1)
cw.plot.add_item(disp0)
cw.plot.add_item(disp2)
cw.plot.add_item(range1)
window.show()
app.exec_()