4951bd743e
* Replace main stanza with PyQt6 compatable variant * Use fn.mkQApp instead * remove needless comments
133 lines
4.4 KiB
Python
133 lines
4.4 KiB
Python
#!/usr/bin/python
|
|
# -*- coding: utf-8 -*-
|
|
"""
|
|
For testing rapid updates of ScatterPlotItem under various conditions.
|
|
|
|
(Scatter plots are still rather slow to draw; expect about 20fps)
|
|
"""
|
|
|
|
# Add path to library (just for examples; you do not need this)
|
|
import initExample
|
|
|
|
import numpy as np
|
|
import pyqtgraph as pg
|
|
from pyqtgraph.Qt import QtGui, QtCore, QtWidgets
|
|
from pyqtgraph.ptime import time
|
|
import pyqtgraph.parametertree as ptree
|
|
import pyqtgraph.graphicsItems.ScatterPlotItem
|
|
|
|
translate = QtCore.QCoreApplication.translate
|
|
|
|
app = pg.mkQApp()
|
|
param = ptree.Parameter.create(name=translate('ScatterPlot', 'Parameters'), type='group', children=[
|
|
dict(name='paused', title=translate('ScatterPlot', 'Paused: '), type='bool', value=False),
|
|
dict(name='count', title=translate('ScatterPlot', 'Count: '), type='int', limits=[1, None], value=500, step=100),
|
|
dict(name='size', title=translate('ScatterPlot', 'Size: '), type='int', limits=[1, None], value=10),
|
|
dict(name='randomize', title=translate('ScatterPlot', 'Randomize: '), type='bool', value=False),
|
|
dict(name='_USE_QRECT', title='_USE_QRECT: ', type='bool', value=pyqtgraph.graphicsItems.ScatterPlotItem._USE_QRECT),
|
|
dict(name='pxMode', title='pxMode: ', type='bool', value=True),
|
|
dict(name='useCache', title='useCache: ', type='bool', value=True),
|
|
dict(name='mode', title=translate('ScatterPlot', 'Mode: '), type='list', values={translate('ScatterPlot', 'New Item'): 'newItem', translate('ScatterPlot', 'Reuse Item'): 'reuseItem', translate('ScatterPlot', 'Simulate Pan/Zoom'): 'panZoom', translate('ScatterPlot', 'Simulate Hover'): 'hover'}, value='reuseItem'),
|
|
])
|
|
for c in param.children():
|
|
c.setDefault(c.value())
|
|
|
|
pt = ptree.ParameterTree(showHeader=False)
|
|
pt.setParameters(param)
|
|
p = pg.PlotWidget()
|
|
splitter = QtWidgets.QSplitter()
|
|
splitter.addWidget(pt)
|
|
splitter.addWidget(p)
|
|
splitter.show()
|
|
|
|
data = {}
|
|
item = pg.ScatterPlotItem()
|
|
hoverBrush = pg.mkBrush('y')
|
|
ptr = 0
|
|
lastTime = time()
|
|
fps = None
|
|
timer = QtCore.QTimer()
|
|
|
|
|
|
def mkDataAndItem():
|
|
global data, fps
|
|
scale = 100
|
|
data = {
|
|
'pos': np.random.normal(size=(50, param['count']), scale=scale),
|
|
'pen': [pg.mkPen(x) for x in np.random.randint(0, 256, (param['count'], 3))],
|
|
'brush': [pg.mkBrush(x) for x in np.random.randint(0, 256, (param['count'], 3))],
|
|
'size': (np.random.random(param['count']) * param['size']).astype(int)
|
|
}
|
|
data['pen'][0] = pg.mkPen('w')
|
|
data['size'][0] = param['size']
|
|
data['brush'][0] = pg.mkBrush('b')
|
|
bound = 5 * scale
|
|
p.setRange(xRange=[-bound, bound], yRange=[-bound, bound])
|
|
mkItem()
|
|
|
|
|
|
def mkItem():
|
|
global item
|
|
pyqtgraph.graphicsItems.ScatterPlotItem._USE_QRECT = param['_USE_QRECT']
|
|
item = pg.ScatterPlotItem(pxMode=param['pxMode'], **getData())
|
|
item.opts['useCache'] = param['useCache']
|
|
p.clear()
|
|
p.addItem(item)
|
|
|
|
|
|
def getData():
|
|
pos = data['pos']
|
|
pen = data['pen']
|
|
size = data['size']
|
|
brush = data['brush']
|
|
if not param['randomize']:
|
|
pen = pen[0]
|
|
size = size[0]
|
|
brush = brush[0]
|
|
return dict(x=pos[ptr % 50], y=pos[(ptr + 1) % 50], pen=pen, brush=brush, size=size)
|
|
|
|
|
|
def update():
|
|
global ptr, lastTime, fps
|
|
mode = param['mode']
|
|
if mode == 'newItem':
|
|
mkItem()
|
|
elif mode == 'reuseItem':
|
|
item.setData(**getData())
|
|
elif mode == 'panZoom':
|
|
item.viewTransformChanged()
|
|
item.update()
|
|
elif mode == 'hover':
|
|
pts = item.points()
|
|
old = pts[(ptr - 1) % len(pts)]
|
|
new = pts[ptr % len(pts)]
|
|
item.pointsAt(new.pos())
|
|
old.resetBrush() # reset old's brush before setting new's to better simulate hovering
|
|
new.setBrush(hoverBrush)
|
|
|
|
ptr += 1
|
|
now = time()
|
|
dt = now - lastTime
|
|
lastTime = now
|
|
if fps is None:
|
|
fps = 1.0 / dt
|
|
else:
|
|
s = np.clip(dt * 3., 0, 1)
|
|
fps = fps * (1 - s) + (1.0 / dt) * s
|
|
p.setTitle('%0.2f fps' % fps)
|
|
p.repaint()
|
|
# app.processEvents() # force complete redraw for every plot
|
|
|
|
|
|
mkDataAndItem()
|
|
for name in ['count', 'size']:
|
|
param.child(name).sigValueChanged.connect(mkDataAndItem)
|
|
for name in ['_USE_QRECT', 'useCache', 'pxMode', 'randomize']:
|
|
param.child(name).sigValueChanged.connect(mkItem)
|
|
param.child('paused').sigValueChanged.connect(lambda _, v: timer.stop() if v else timer.start())
|
|
timer.timeout.connect(update)
|
|
timer.start(0)
|
|
|
|
if __name__ == '__main__':
|
|
pg.mkQApp().exec_()
|