visual_stimulus - GitPress.io

Example Python program visual_stimulus.py This program creates a PyQt GUI

Modules

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

Classes

class SSVEPWindow(QWidget):

Methods

def init(self):
def set_stimuli(self, hz):
def set_new_stimuli(self, value):
def initUI(self):
def change_color(self):

Code

Example Python PyQt program :

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class SSVEPWindow(QWidget):
    def __init__(self):
        super().__init__()
        self.title = '画面チカチカ君'
        self.width = 1200
        self.height = 800

        # parameters
        self.timer = QTimer()
        self.timer.timeout.connect(self.change_color)
        self.light = False

        self.initUI()

    def set_stimuli(self, hz):
        self.stimuli_hz = hz
        self.stimuli_int_ms = 500 / self.stimuli_hz
        self.timer.setInterval(self.stimuli_int_ms)
        self.freq_text.setText('freq: {} Hz'.format(hz))

    def set_new_stimuli(self, value):
        self.set_stimuli(value / 10)

    def initUI(self):
        self.setWindowTitle(self.title)
        self.setGeometry(0, 0, self.width, self.height)

        # setup UI
        self.start_button = QPushButton('Start!!')
        self.start_button.clicked.connect(self.timer.start)
        self.stop_button = QPushButton('Stop...')
        self.stop_button.clicked.connect(self.timer.stop)

        self.paint_area = QWidget()
        self.paint_area.setAutoFillBackground(True)

        self.freq_slider = QSlider(Qt.Horizontal)
        self.freq_slider.setMinimum(10)
        self.freq_slider.setMaximum(200)
        self.freq_slider.valueChanged.connect(self.set_new_stimuli)
        self.freq_text = QLabel()

        self.layout = QGridLayout()
        self.layout.addWidget(self.start_button, 0, 0, 1, 3)
        self.layout.addWidget(self.stop_button, 0, 3, 1, 3)
        self.layout.addWidget(self.paint_area, 1, 0, 1, 6)
        self.layout.addWidget(self.freq_slider, 2, 0, 1, 5)
        self.layout.addWidget(self.freq_text, 2, 5, 1, 1)
        self.setLayout(self.layout)

        self.set_stimuli(1.0)
        self.change_color()
        self.show()

    def change_color(self):
        self.light = not self.light
        palette = QPalette()
        if self.light:
            palette.setColor(QPalette.Window, QColor(255,255,255))
        else:
            palette.setColor(QPalette.Window, QColor('black'))
        self.paint_area.setPalette(palette)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    gui = SSVEPWindow()
    sys.exit(app.exec_())

Useful Links

Articles: https://python-commandments.org/
PyQt: https://pythonpyqt.com/
Tutorial: https://pythonprogramminglanguage.com/