57 lines
1.4 KiB
Python
57 lines
1.4 KiB
Python
# -*- coding: utf-8 -*-
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"""
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JoystickButton is a button with x/y values. When the button is depressed and the
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mouse dragged, the x/y values change to follow the mouse.
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When the mouse button is released, the x/y values change to 0,0 (rather like
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letting go of the joystick).
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"""
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import initExample ## Add path to library (just for examples; you do not need this)
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from pyqtgraph.Qt import QtGui, QtCore
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import pyqtgraph as pg
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app = QtGui.QApplication([])
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mw = QtGui.QMainWindow()
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mw.resize(300,50)
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mw.setWindowTitle('pyqtgraph example: JoystickButton')
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cw = QtGui.QWidget()
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mw.setCentralWidget(cw)
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layout = QtGui.QGridLayout()
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cw.setLayout(layout)
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mw.show()
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l1 = pg.ValueLabel(siPrefix=True, suffix='m')
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l2 = pg.ValueLabel(siPrefix=True, suffix='m')
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jb = pg.JoystickButton()
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jb.setFixedWidth(30)
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jb.setFixedHeight(30)
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layout.addWidget(l1, 0, 0)
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layout.addWidget(l2, 0, 1)
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layout.addWidget(jb, 0, 2)
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x = 0
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y = 0
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def update():
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global x, y, l1, l2, jb
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dx, dy = jb.getState()
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x += dx * 1e-3
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y += dy * 1e-3
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l1.setValue(x)
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l2.setValue(y)
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timer = QtCore.QTimer()
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timer.timeout.connect(update)
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timer.start(30)
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## Start Qt event loop unless running in interactive mode or using pyside.
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if __name__ == '__main__':
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import sys
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if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
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QtGui.QApplication.instance().exec_()
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