我在TraitsUI包中的表格适配器中遇到了问题...
我一直试图自己解决这个问题太久了，所以我想向这里的专家寻求一些友好的建议:)
我将添加我的程序的一部分来说明我的问题，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 将表编辑器生成到一个 dtype 数组中，它工作得很好，除了：
1） 每当我更改元素的 #（标识为"断裂数："）时，数组都会调整大小，但直到我单击其中一个元素后，表格才会反映更改。 我想发生的是，在我释放 # 的断裂滑块后，行（断裂）的 # 会发生变化。 这可行吗？
2）我遇到的第二个问题是，如果数组在被.configure_traits（）显示之前被调整大小（当Number_of_fractures被修改时由通知程序显示），我可以缩小数组的大小，但我不能增加它超过新的大小。
2b） 我以为我已经找到了一种方法让表编辑器显示完整的数组，即使它增加了代码中的 5 集（就在调用 .trait_configure（））之前），但我被愚弄了:(我尝试在vertical_fracture_group前面添加另一个 Group（），这样表格就不会首先显示。 这更接近于我的整个程序。 当我这样做时，我被锁定在新的较小大小的阵列中，我无法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
在下面我与克里斯的讨论中，他提出了一些到目前为止对我不起作用的建议:( 以下是我这个测试代码的"当前"版本，以便 Chris（或任何其他希望插话的人）可以看到我是否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
有两个
代码细节导致了您所描述的问题。首先，vertical_frac_array不是特征，因此表格编辑器无法监视其更改。因此，仅当您手动与之交互时，表才会刷新。其次，特征不监视数组的内容是否有更改，而是监视数组的标识。因此，不会检测到调整大小并将值分配到数组中。
解决此问题的一种方法是首先使vertical_frac_array并Array特征。 例如 vertical_frac_array = Array(dtype=vertical_frac_dtype) .然后，在 _Number_Of_Fractures_changed 中，不要resize vertical_frac_array并就地修改它。相反，复制vertical_frac_array，调整其大小，修改内容，然后将操作的副本重新分配给vertical_frac_array。这样，表将看到数组的标识已更改，并将刷新视图。
另一种选择是将vertical_frac_array设为List而不是Array。这避免了上述复制和重新分配技巧，因为特征确实监视列表的内容。
编辑
我的解决方案如下。我没有在Number_Of_Fractures更改时调整vertical_frac_array的大小，而是重新创建数组。我还通过 _vertical_frac_array_default 方法提供了vertical_frac_array的默认值。（我也从视图中不必要的代码中删除了。
# -*- 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 dtype, zeros
from traits.api import HasTraits, Range, Array
from traitsui.api import View, Item
#-- FileDialogDemo Class -------------------------------------------------------
max_cracks = 15 #maximum number of Fracs/cracks to allow
vertical_frac_dtype = dtype([('Fracture', 'int'), ('x', 'float'), ('y', 'float'),
('z', 'float'), ('Horiz Length', 'float'), ('Vert Length', 'float')
, ('z-axis Rotation, degrees', 'float')])
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_array = Array(dtype=vertical_frac_dtype)
view = View(
Item('Number_Of_Fractures'),
Item(
'vertical_frac_array',
show_label=False,
editor=TabularEditor(
adapter=VertFractureAdapter(),
),
width=0.5,
height=0.5,
),
width=0.60,
height=0.50,
title='****** Setup',
resizable=True,
)
#-- Traits Defaults -------------------------------------------------------
def _vertical_frac_array_default(self):
""" Creates the default value of the `vertical_frac_array`. """
return self._calculate_frac_array()
#-- Traits Event Handlers -------------------------------------------------
def _Number_Of_Fractures_changed(self):
""" Update `vertical_frac_array` when `Number_Of_Fractures` changes """
print "I've changed the # of Fractures to " + repr(self.Number_Of_Fractures)
#if not self.user_StartingUp:
self.vertical_frac_array = self._calculate_frac_array()
#-- Private Interface -----------------------------------------------------
def _calculate_frac_array(self):
arr = zeros(self.Number_Of_Fractures, dtype=vertical_frac_dtype)
for crk in range(self.Number_Of_Fractures):
arr[crk]['Fracture'] = crk+1
arr[crk]['x'] = crk
arr[crk]['y'] = crk
arr[crk]['z'] = crk
return arr
# Run the program (if invoked from the command line):
if __name__ == '__main__':
# Create the dialog:
fileDialog = SetupDialog()
fileDialog.configure_traits()