class ScrubberDemo(HasTraits):
# Define some sample ranges and values:
simple_integer = Range(0, 100)
rollover_float = Range(-10.0, 10.0)
bordered_unbounded = Float
themed_dynamic_low = Range(high=-0.01, value=-10.0)
themed_dynamic_high = Range(low=0.01, value=10.0)
themed_dynamic_value = Range('themed_dynamic_low', 'themed_dynamic_high',
0.0)
# Define the demo view:
view = View(HGroup(
VGroup(Item('simple_integer', editor=ScrubberEditor()),
Item('rollover_float',
editor=ScrubberEditor(hover_color=0xFFFFFF,
active_color=0xA0CD9E)),
Item('bordered_unbounded',
editor=ScrubberEditor(hover_color=0xFFFFFF,
active_color=0xA0CD9E,
border_color=0x808080)),
TItem('themed_dynamic_low'),
TItem('themed_dynamic_high'),
TItem('themed_dynamic_value'),
show_border=True,
label='Scrubber Editors'),
VGroup(Item('simple_integer'),
Item('rollover_float'),
Item('bordered_unbounded'),
Item('themed_dynamic_low'),
Item('themed_dynamic_high'),
Item('themed_dynamic_value'),
show_border=True,
label='Default Editors'), spring),
title='Scrubber Editor Demo')
from enthought.traits.api import \
Str, Float, HasTraits, Property, cached_property, Range, Instance, on_trait_change, Enum
from enthought.chaco.api import Plot, AbstractPlotData, ArrayPlotData, VPlotContainer
from enthought.traits.ui.api import \
Item, View, VGroup, HSplit, ScrubberEditor, VSplit
from enthought.enable.api import Component, ComponentEditor
from enthought.chaco.tools.api import PanTool, ZoomTool
import numpy as np
# 鼠标拖动修改值的控件的样式
scrubber = ScrubberEditor(hover_color=0xFFFFFF,
active_color=0xA0CD9E,
border_color=0x808080)
# 取FFT计算的结果freqs中的前n项进行合成，返回合成结果，计算loops个周期的波形
def fft_combine(freqs, n, loops=1):
length = len(freqs) * loops
data = np.zeros(length)
index = loops * np.arange(0, length, 1.0) / length * (2 * np.pi)
for k, p in enumerate(freqs[:n]):
if k != 0: p *= 2 # 除去直流成分之外，其余的系数都*2
data += np.real(p) * np.cos(k * index) # 余弦成分的系数为实数部
data -= np.imag(p) * np.sin(k * index) # 正弦成分的系数为负的虚数部
return index, data
def scrubber(inc):
'''创建不同增量的ScrubberEditor'''
return ScrubberEditor(hover_color=0xFFFFFF,
active_color=0xA0CD9E,
border_color=0x808080,
increment=inc)
class TItem(Item):
editor = ScrubberEditor()
item_theme = ATheme('@std:LG')