172 lines
5.8 KiB
Python
172 lines
5.8 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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"""
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Apply various palettes to an existing plot
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"""
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## Add path to library (just for examples; you do not need this)
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import initExample
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import numpy as np
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from pyqtgraph.Qt import mkQApp, QtCore, QtWidgets
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from pyqtgraph.ptime import time
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import pyqtgraph as pg
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class MainWindow(QtWidgets.QMainWindow):
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""" example application main window """
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def __init__(self, *args, **kwargs):
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super(MainWindow, self).__init__(*args, **kwargs)
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pg.setConfigOption('imageAxisOrder', 'row-major')
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main_wid = QtWidgets.QWidget()
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self.setCentralWidget(main_wid)
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self.setWindowTitle('pyqtgraph example: Palette demonstration')
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self.resize(600,600)
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# test_palette = pg.palette.get('system')
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pg.palette.get('relaxed_dark').apply()
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main_layout = QtWidgets.QGridLayout( main_wid )
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gr_wid = pg.GraphicsLayoutWidget(show=True)
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main_layout.addWidget( gr_wid, 0,0, 1,5 )
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btn = QtWidgets.QPushButton('continuous')
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btn.clicked.connect(self.handle_button_timer_on)
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main_layout.addWidget(btn, 1,0, 1,1 )
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btn = QtWidgets.QPushButton('stop updates')
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btn.clicked.connect(self.handle_button_timer_off)
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main_layout.addWidget(btn, 2,0, 1,1 )
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palette_buttons = (
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('apply <legacy>', 1,2, self.handle_button_pal1 ),
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('legacy fg/bg 1', 1,3, self.handle_button_leg1 ),
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('legacy fg/bg 2', 1,4, self.handle_button_leg2 ),
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('apply <mono green>', 2,2, self.handle_button_mono1 ),
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('apply <mono amber>', 3,2, self.handle_button_mono2 ),
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('apply <relaxed-dark>' , 2,3, self.handle_button_pal2 ),
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('apply <relaxed-light>', 2,4, self.handle_button_pal3 ),
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('apply <pastels>' , 3,3, self.handle_button_pal4 ),
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('apply <synthwave>' , 3,4, self.handle_button_pal5 ),
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)
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for text, row, col, func in palette_buttons:
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btn = QtWidgets.QPushButton(text)
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btn.clicked.connect(func)
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main_layout.addWidget(btn, row,col, 1,1 )
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self.plt = gr_wid.addPlot()
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self.plt.enableAutoRange(False)
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self.plt.setYRange( -7,7 )
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self.plt.setXRange( 0, 15 ) #500 )
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self.plt.setLabel('bottom', 'Index', units='B')
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self.data1 = +3 + np.random.normal(size=(15)) #500))
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self.data2 = -3 + np.random.normal(size=(15)) #500))
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self.curve1 = pg.ScatterPlotItem(
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symbol='o', symbolSize=12, symbolPen='p1', symbolBrush=('p2',127),
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hoverable=True, hoverPen='gr_acc', hoverBrush='gr_reg')
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self.plt.addItem(self.curve1)
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self.curve2 = pg.PlotCurveItem(pen='p3', brush=('p3',128))
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self.curve2.setFillLevel(0)
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self.plt.addItem(self.curve2)
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self.show()
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self.pal_1 = pg.palette.get('legacy')
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self.pal_2 = pg.palette.get('relaxed_dark')
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self.pal_3 = pg.palette.get('relaxed_light')
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self.pal_4 = pg.palette.get('pastels')
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self.pal_5 = pg.palette.get('synthwave')
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self.mpal_1 = pg.palette.get('monochrome','green')
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self.mpal_2 = pg.palette.get('monochrome','amber')
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self.lastTime = time()
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self.fps = None
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self.timer = QtCore.QTimer(singleShot=False)
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self.timer.timeout.connect( self.timed_update )
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self.timed_update()
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def testSignal(self, val):
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""" demonstrate use of PaletteChanged signal """
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print('"Palette changed" signal was received with value', val)
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def handle_button_timer_on(self):
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""" (re-)activate timer """
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self.timer.start(1)
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def handle_button_timer_off(self):
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""" de-activate timer """
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self.timer.stop()
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def handle_button_pal1(self):
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""" apply palette 1 on request """
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self.pal_1.apply()
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def handle_button_pal2(self):
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""" apply palette 2 on request """
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self.pal_2.apply()
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def handle_button_pal3(self):
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""" apply palette 1 on request """
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self.pal_3.apply()
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def handle_button_pal4(self):
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""" apply palette 1 on request """
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self.pal_4.apply()
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def handle_button_pal5(self):
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""" apply palette 1 on request """
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self.pal_5.apply()
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def handle_button_mono1(self):
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""" apply monochrome palette 1 on request """
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self.mpal_1.apply()
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def handle_button_mono2(self):
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""" apply monochrome palette 2 on request """
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self.mpal_2.apply()
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def handle_button_leg1(self):
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""" test legacy background / foreground overrides """
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pg.setConfigOption('background', '#800000')
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pg.setConfigOption('foreground', '#0000ff')
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def handle_button_leg2(self):
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""" test legacy background / foreground overrides """
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pg.setConfigOption('background', '#8080ff')
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pg.setConfigOption('foreground', '#ff0000')
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def timed_update(self):
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""" update loop, called by timer """
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self.data1[:-1] = self.data1[1:]
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self.data1[-1] = +3 + np.random.normal()
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xdata = np.arange( len(self.data1) )
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self.curve1.setData( x=xdata, y=self.data1 )
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self.data2[:-1] = self.data2[1:]
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self.data2[-1] = -3 + np.random.normal()
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self.curve2.setData( y=self.data2 )
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now = time()
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dt = now - self.lastTime
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self.lastTime = now
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if self.fps is None:
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self.fps = 1.0/dt
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else:
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s = np.clip(dt*3., 0, 1)
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self.fps = self.fps * (1-s) + (1.0/dt) * s
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self.plt.setTitle('%0.2f fps' % self.fps)
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QtWidgets.QApplication.processEvents() ## force complete redraw for every plot
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mkQApp("Palette test and design application")
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main_window = MainWindow()
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## Start Qt event loop
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if __name__ == '__main__':
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pg.mkQApp().exec_()
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