在我正在开发的 wxPython 应用程序中,我需要很多数字输入字段(整数和浮点数),所以我尝试使用 wx.lib.masked.NumCtrl,但我的用户现在告诉我,使用它非常不舒服(并且我同意他们的观点)。
是否有我可以使用的替代小部件实现,或者我应该从裸露的 TextCtrl 开始自己推出?
(wxPython 2.8.9.1)
编辑
为了完整起见,这里有一个“不舒服”的例子:
给定带有
selectOnEntry
和 fractionWidth > 0
的 NumCtrl,当您切换到字段的小数部分时,它会被正确选择,但按数字不会执行任何操作,您必须先删除字段的内容。
在通常的 wxPython 发行版中,有 IntCtrl,还有一些其他 GUI 控件,如 Slider、Spin、FloatSpin 和 KnobCtrl。
还有 Enthought Traits 方法,其中的 GUI 部分似乎将相当多的重点放在数字输入和显示上,例如 对数滑块、浮点数组编辑器等。即使你不走这条路,他们的设计也可能会给你一些灵感。
另外,还不清楚为什么你不喜欢屏蔽的 NumCtrl,但是编写你自己的 NumCtrl 很容易,所以如果你想要一些特定的东西,这可能就是要走的路。
您可以使用 TxtCtrl 并检查按下的用户键代码并仅添加数字键代码。 我亲自做到了这一点并管理了字段 ecc 的所有选择部分。
用途:
self.__MyTxtCtrl.Bind(wx.EVT_CHAR, self.__on_change_text_check_is_int_value)
def __on_change_text_check_is_int_value(self, evt):
KeyboardEventUtils.on_change_text_check_is_int_value(self, evt)
单例类utils中的监听器:
from pyglet.window import key
FLOAT_POINT = "."
ENTRY_ID = "id"
ENTRY_KEY_EVENT = "keyEvent"
ENTRY_SELECTION_EVENT = "selectionEvent"
MASK_STARTED_RIGHT_SELECTION = 1
MASK_STARTED_LEFT_SELECTION = -1
class KeyboardEventUtils(object):
__mLastEvt = {}
def check_input_key_only_numeric_value(value, strng):
return value.isnumeric() or (value == FLOAT_POINT and not FLOAT_POINT in strng and len(strng) > 0)
def on_change_text_check_is_int_value(self, evt):
txt = evt.GetEventObject()
value = chr(evt.GetUnicodeKey())
if KeyboardEventUtils.__mLastEvt != None and len(KeyboardEventUtils.__mLastEvt) > 0 and KeyboardEventUtils.__mLastEvt[ENTRY_ID] != txt.GetId():
self._mLastEvt = {}
if check_input_key_only_numeric_value(value, txt.GetValue()):
pos = txt.GetInsertionPoint()
txt.SetValue(txt.GetValue()[:pos] + value + txt.GetValue()[pos:])
txt.SetInsertionPoint(pos + 1)
elif (evt.GetModifiers() == 4 or evt.GetModifiers() == key.MOD_SHIFT) and evt.GetRawKeyCode() == key.LEFT: # 4 (?) key.MOD_SHIFT (?) TO FIX
pos = txt.GetInsertionPoint()
rng = list(txt.GetSelection())
if rng[0] == rng[1] and ENTRY_SELECTION_EVENT in KeyboardEventUtils.__mLastEvt:
del KeyboardEventUtils.__mLastEvt[ENTRY_SELECTION_EVENT]
if ENTRY_SELECTION_EVENT in KeyboardEventUtils.__mLastEvt and KeyboardEventUtils.__mLastEvt[ENTRY_SELECTION_EVENT] == MASK_STARTED_RIGHT_SELECTION:
rng[1] = rng[1] - 1
else:
KeyboardEventUtils.__mLastEvt[ENTRY_SELECTION_EVENT] = MASK_STARTED_LEFT_SELECTION
rng[0] = rng[0] - 1
txt.SetSelection(rng[0], rng[1])
elif (evt.GetModifiers() == 4 or evt.GetModifiers() == key.MOD_SHIFT): # 4 (?) key.MOD_SHIFT (?) TO FIX
pos = txt.GetInsertionPoint()
rng = list(txt.GetSelection())
if rng[0] == rng[1] and ENTRY_SELECTION_EVENT in KeyboardEventUtils.__mLastEvt:
del KeyboardEventUtils.__mLastEvt[ENTRY_SELECTION_EVENT]
if ENTRY_SELECTION_EVENT in KeyboardEventUtils.__mLastEvt and KeyboardEventUtils.__mLastEvt[ENTRY_SELECTION_EVENT] == MASK_STARTED_LEFT_SELECTION:
rng[0] = rng[0] + 1
else:
KeyboardEventUtils.__mLastEvt[ENTRY_SELECTION_EVENT] = MASK_STARTED_RIGHT_SELECTION
rng[1] = rng[1] + 1
txt.SetSelection(rng[0], rng[1])
elif evt.GetRawKeyCode() == key.LEFT:
rng = list(txt.GetSelection())
if rng[0] != rng[1]:
txt.SetInsertionPoint(rng[0])
else:
txt.SetInsertionPoint(txt.GetInsertionPoint() - 1)
elif evt.GetRawKeyCode() == key.RIGHT:
rng = list(txt.GetSelection())
if rng[0] != rng[1]:
txt.SetInsertionPoint(rng[1])
else:
txt.SetInsertionPoint(txt.GetInsertionPoint() + 1)
elif evt.GetRawKeyCode() == key.UP or evt.GetRawKeyCode() == key.DOWN:
pass
elif evt.GetRawKeyCode() == key.BACKSPACE:
pos = txt.GetInsertionPoint()
if txt.GetStringSelection() == "":
txt.SetValue(txt.GetValue()[:pos-1] + txt.GetValue()[pos:])
txt.SetInsertionPoint(pos - 0x1)
else:
r = txt.GetSelection()
txt.SetValue(txt.GetValue()[:r[0]] + txt.GetValue()[r[1]:])
txt.SetInsertionPoint(pos)
elif evt.GetRawKeyCode() == key.DELETE:
pos = txt.GetInsertionPoint()
if txt.GetStringSelection() == "":
txt.SetValue(txt.GetValue()[:pos] + txt.GetValue()[pos+1:])
else:
r = txt.GetSelection()
txt.SetValue(txt.GetValue()[:r[0]] + txt.GetValue()[r[1]:])
txt.SetInsertionPoint(pos)
elif evt.GetModifiers() == key.MOD_CTRL and evt.GetRawKeyCode() == key.A:
txt.SelectAll()
else:
KeyboardEventUtils.__mLastEvt[ENTRY_ID] = txt.GetId()
KeyboardEventUtils.__mLastEvt[ENTRY_KEY_EVENT] = evt
return False
KeyboardEventUtils.__mLastEvt[ENTRY_ID] = txt.GetId()
KeyboardEventUtils.__mLastEvt[ENTRY_KEY_EVENT] = evt
return True
希望能帮到你^^