我在 TraitsUI 包中遇到了 TabularAdapter 的问题...
我一直在尝试自己解决这个问题太久了，所以我想在这里向专家寻求一些友好的建议:)
我将添加一段我的程序来说明我的问题，我希望有人可以查看它并说“啊哈！......这是你的问题”（我的手指交叉）。
基本上，我可以使用 TabularAdapter 将表格编辑器生成到 dtypes 数组中，它工作得很好，除了：
1) 每当我更改元素的数量（标识为“骨折数：”）时，数组都会调整大小，但在我单击其中一个元素之前，表格不会反映更改。我想要发生的是，在我释放骨折数滑块后，行数（骨折数）会发生变化。这是可行的吗？
2）我遇到的第二个问题是，如果数组在 .configure_traits() 显示之前被调整大小（当 Number_of_fractures 被修改时由通知程序），我可以缩小数组的大小，但我不能增加它超过新尺寸。
2b）我以为我找到了一种方法让表编辑器显示完整数组，即使它增加了代码中的 5 个集合（就在调用 .trait_configure() 之前），但我被愚弄了:( 我尝试添加另一个Group() 在 vertical_fracture_group 前面，所以表格不是第一个显示的东西。这更接近地模拟了我的整个程序。当我这样做时，我被锁定在新的较小大小的数组中，我不能再将其大小增加到最大 15。我正在修改代码以反映此问题。
这是我的示例代码：
# -*- coding: utf-8 -*-
"""
This is a first shot at developing a ****** User Interface using Canopy by
Enthought. Canopy is a distribution of the Python language which has a lot of
scientific and engineering features 'built-in'.
"""
#-- Imports --------------------------------------------------------------------
from traitsui.api import TabularEditor
from traitsui.tabular_adapter import TabularAdapter
from numpy import zeros, dtype
from traits.api import HasTraits, Range
from traitsui.api import View, Group, Item
#-- FileDialogDemo Class -------------------------------------------------------
max_cracks = 15 #maximum number of Fracs/cracks to allow
class VertFractureAdapter(TabularAdapter):
columns = [('Frac #',0), ('X Cen',1), ('Y Cen',2), ('Z Cen',3),
('Horiz',4), ('Vert',5), ('Angle',6)]
class SetupDialog ( HasTraits ):
Number_Of_Fractures = Range(1, max_cracks) # line 277
vertical_frac_dtype = dtype([('Fracture', 'int'), ('x', 'float'), ('y', 'float'),
('z', 'float'), ('Horiz Length', 'float'), ('Vert Length', 'float')
, ('z-axis Rotation, degrees', 'float')])
vertical_frac_array = zeros((max_cracks), dtype=vertical_frac_dtype)
vertical_fracture_group = Group(
Item(name = 'vertical_frac_array',
show_label = False,
editor = TabularEditor(adapter = VertFractureAdapter()),
width = 0.5,
height = 0.5,
)
)
#-- THIS is the actual 'View' that gets put on the screen
view = View(
#Note: When as this group 'displays' before the one with the Table, I'm 'locked' into my new maximum table display size of 8 (not my original/desired maximum of 15)
Group(
Item( name = 'Number_Of_Fractures'),
),
#Note: If I place this Group() first, my table is free to grow to it's maximum of 15
Group(
Item( name = 'Number_Of_Fractures'),
vertical_fracture_group,
),
width = 0.60,
height = 0.50,
title = '****** Setup',
resizable=True,
)
#-- Traits Event Handlers --------------------------------------------------
def _Number_Of_Fractures_changed(self):
""" Handles resizing arrays if/when the number of Fractures is changed"""
print "I've changed the # of Fractures to " + repr(self.Number_Of_Fractures)
#if not self.user_StartingUp:
self.vertical_frac_array.resize(self.Number_Of_Fractures, refcheck=False)
for crk in range(self.Number_Of_Fractures):
self.vertical_frac_array[crk]['Fracture'] = crk+1
self.vertical_frac_array[crk]['x'] = crk
self.vertical_frac_array[crk]['y'] = crk
self.vertical_frac_array[crk]['z'] = crk
# Run the program (if invoked from the command line):
if __name__ == '__main__':
# Create the dialog:
fileDialog = SetupDialog()
fileDialog.configure_traits()
fileDialog.Number_Of_Fractures = 8
在下面我与 Chris 的讨论中，他提出了一些迄今为止对我没有用的建议：（以下是我的“当前”版本的测试代码，以便 Chris（或其他任何希望加入的人）可以查看我是否我犯了一些明显的错误。
# -*- coding: utf-8 -*-
"""
This is a first shot at developing a ****** User Interface using Canopy by
Enthought. Canopy is a distribution of the Python language which has a lot of
scientific and engineering features 'built-in'.
"""
#-- Imports --------------------------------------------------------------------
from traitsui.api import TabularEditor
from traitsui.tabular_adapter import TabularAdapter
from numpy import zeros, dtype
from traits.api import HasTraits, Range, Array, List
from traitsui.api import View, Group, Item
#-- FileDialogDemo Class -------------------------------------------------------
max_cracks = 15 #maximum number of Fracs/cracks to allow
class VertFractureAdapter(TabularAdapter):
columns = [('Frac #',0), ('X Cen',1), ('Y Cen',2), ('Z Cen',3),
('Horiz',4), ('Vert',5), ('Angle',6)]
even_bg_color = 0xf4f4f4 # very light gray
class SetupDialog ( HasTraits ):
Number_Of_Fractures = Range(1, max_cracks) # line 277
dummy = Range(1, max_cracks)
vertical_frac_dtype = dtype([('Fracture', 'int'), ('x', 'float'), ('y', 'float'),
('z', 'float'), ('Horiz Length', 'float'), ('Vert Length', 'float')
, ('z-axis Rotation, degrees', 'float')])
vertical_frac_array = Array(dtype=vertical_frac_dtype)
vertical_fracture_group = Group(
Item(name = 'vertical_frac_array',
show_label = False,
editor = TabularEditor(adapter = VertFractureAdapter()),
width = 0.5,
height = 0.5,
)
)
#-- THIS is the actual 'View' that gets put on the screen
view = View(
Group(
Item( name = 'dummy'),
),
Group(
Item( name = 'Number_Of_Fractures'),
vertical_fracture_group,
),
width = 0.60,
height = 0.50,
title = '****** Setup',
resizable=True,
)
#-- Traits Event Handlers --------------------------------------------------
def _Number_Of_Fractures_changed(self, old, new):
""" Handles resizing arrays if/when the number of Fractures is changed"""
print "I've changed the # of Fractures to " + repr(self.Number_Of_Fractures)
vfa = self.vertical_frac_array
vfa.resize(self.Number_Of_Fractures, refcheck=False)
for crk in range(self.Number_Of_Fractures):
vfa[crk]['Fracture'] = crk+1
vfa[crk]['x'] = crk
vfa[crk]['y'] = crk
vfa[crk]['z'] = crk
self.vertical_frac_array = vfa
# Run the program (if invoked from the command line):
if __name__ == '__main__':
# Create the dialog:
fileDialog = SetupDialog()
# put the actual dialog up...if I put it up 'first' and then resize the array, I seem to get my full range back :)
fileDialog.configure_traits()
#fileDialog.Number_Of_Fractures = 8