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"""
This example demonstrates the SpinBox widget, which is an extension of
QDoubleSpinBox providing some advanced features:
* SI-prefixed units
* Non-linear stepping modes
* Bounded/unbounded values
"""
import ast
import pyqtgraph as pg
from pyqtgraph.Qt import QtWidgets
app = pg.mkQApp("SpinBox Example")
spins = [
("Floating-point spin box, min=0, no maximum.<br>Non-finite values (nan, inf) are permitted.",
pg.SpinBox(value=5.0, bounds=[0, None], finite=False)),
("Integer spin box, dec stepping<br>(1-9, 10-90, 100-900, etc), decimals=4",
pg.SpinBox(value=10, int=True, dec=True, minStep=1, step=1, decimals=4)),
("Float with SI-prefixed units<br>(n, u, m, k, M, etc)",
pg.SpinBox(value=0.9, suffix='V', siPrefix=True)),
("Float with SI-prefixed units,<br>dec step=0.1, minStep=0.1",
pg.SpinBox(value=1.0, suffix='PSI', siPrefix=True, dec=True, step=0.1, minStep=0.1)),
("Float with SI-prefixed units,<br>dec step=0.5, minStep=0.01",
pg.SpinBox(value=1.0, suffix='V', siPrefix=True, dec=True, step=0.5, minStep=0.01)),
("Float with SI-prefixed units,<br>dec step=1.0, minStep=0.001",
pg.SpinBox(value=1.0, suffix='V', siPrefix=True, dec=True, step=1.0, minStep=0.001)),
("Float with SI prefix but no suffix",
pg.SpinBox(value=1e9, siPrefix=True)),
("Float with custom formatting",
pg.SpinBox(value=23.07, format='${value:0.02f}',
regex='\$?(?P<number>(-?\d+(\.\d+)?)|(-?\.\d+))$')),
("Int with suffix",
pg.SpinBox(value=999, step=1, int=True, suffix="V")),
("Int with custom formatting",
pg.SpinBox(value=4567, step=1, int=True, bounds=[0,None], format='0x{value:X}',
regex='(0x)?(?P<number>[0-9a-fA-F]+)$',
evalFunc=lambda s: ast.literal_eval('0x'+s))),
("Integer with bounds=[10, 20] and wrapping",
pg.SpinBox(value=10, bounds=[10, 20], int=True, minStep=1, step=1, wrapping=True)),
]
win = QtWidgets.QMainWindow()
win.setWindowTitle('pyqtgraph example: SpinBox')
cw = QtWidgets.QWidget()
layout = QtWidgets.QGridLayout()
cw.setLayout(layout)
win.setCentralWidget(cw)
win.show()
#win.resize(300, 600)
changingLabel = QtWidgets.QLabel() ## updated immediately
changedLabel = QtWidgets.QLabel() ## updated only when editing is finished or mouse wheel has stopped for 0.3sec
changingLabel.setMinimumWidth(200)
font = changingLabel.font()
font.setBold(True)
font.setPointSize(14)
changingLabel.setFont(font)
changedLabel.setFont(font)
labels = []
def valueChanged(sb):
changedLabel.setText("Final value: %s" % str(sb.value()))
def valueChanging(sb, value):
changingLabel.setText("Value changing: %s" % str(sb.value()))
for text, spin in spins:
label = QtWidgets.QLabel(text)
labels.append(label)
layout.addWidget(label)
layout.addWidget(spin)
spin.sigValueChanged.connect(valueChanged)
spin.sigValueChanging.connect(valueChanging)
layout.addWidget(changingLabel, 0, 1)
layout.addWidget(changedLabel, 2, 1)
#def mkWin():
#win = QtWidgets.QMainWindow()
#g = QtWidgets.QFormLayout()
#w = QtWidgets.QWidget()
#w.setLayout(g)
#win.setCentralWidget(w)
#s1 = SpinBox(value=5, step=0.1, bounds=[-1.5, None], suffix='units')
#t1 = QtWidgets.QLineEdit()
#g.addRow(s1, t1)
#s2 = SpinBox(value=10e-6, dec=True, step=0.1, minStep=1e-6, suffix='A', siPrefix=True)
#t2 = QtWidgets.QLineEdit()
#g.addRow(s2, t2)
#s3 = SpinBox(value=1000, dec=True, step=0.5, minStep=1e-6, bounds=[1, 1e9], suffix='Hz', siPrefix=True)
#t3 = QtWidgets.QLineEdit()
#g.addRow(s3, t3)
#s4 = SpinBox(int=True, dec=True, step=1, minStep=1, bounds=[-10, 1000])
#t4 = QtWidgets.QLineEdit()
#g.addRow(s4, t4)
#win.show()
#import sys
#for sb in [s1, s2, s3,s4]:
##QtCore.QObject.connect(sb, QtCore.SIGNAL('valueChanged(double)'), lambda v: sys.stdout.write(str(sb) + " valueChanged\n"))
##QtCore.QObject.connect(sb, QtCore.SIGNAL('editingFinished()'), lambda: sys.stdout.write(str(sb) + " editingFinished\n"))
#sb.sigValueChanged.connect(valueChanged)
#sb.sigValueChanging.connect(valueChanging)
#sb.editingFinished.connect(lambda: sys.stdout.write(str(sb) + " editingFinished\n"))
#return win, w, [s1, s2, s3, s4]
#a = mkWin()
#def test(n=100):
#for i in range(n):
#win, w, sb = mkWin()
#for s in sb:
#w.setParent(None)
#s.setParent(None)
#s.valueChanged.disconnect()
#s.editingFinished.disconnect()
if __name__ == '__main__':
pg.exec()
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