标签:event-handling wxpython python
考虑以下代码:
import wx
class MyFrame(wx.Frame):
def __init__(self, *args, **kwds):
wx.Frame.__init__(self, *args, **kwds)
self.cb1 = wx.CheckBox(self, -1, "CheckBox 1")
self.cb2 = wx.CheckBox(self, -1, "CheckBox 2")
self.cb3 = wx.CheckBox(self, -1, "CheckBox 3")
sizer = wx.BoxSizer(wx.VERTICAL)
sizer.Add(self.cb1, 0, wx.ADJUST_MINSIZE, 0)
sizer.Add(self.cb2, 0, wx.ADJUST_MINSIZE, 0)
sizer.Add(self.cb3, 0, wx.ADJUST_MINSIZE, 0)
self.SetSizer(sizer)
self.Layout()
self.Bind(wx.EVT_CHECKBOX, self.OnCb1, self.cb1)
self.Bind(wx.EVT_CHECKBOX, self.OnCb2, self.cb2)
def OnCb1(self, evt):
self.cb2.SetValue(evt.IsChecked())
def OnCb2(self, evt):
self.cb3.SetValue(evt.IsChecked())
if __name__ == "__main__":
app = wx.PySimpleApp(0)
frame = MyFrame(None, -1, "")
app.SetTopWindow(frame)
frame.Show()
app.MainLoop()
在这里,我有3个复选框绑定在一起,因此cb1进行检查时cb2被检查,而cb2进行检查时cb3被检查.但是,当我在OnCb1例程中设置cb2的值时,不会触发cb2复选框事件,并且cb3复选框保持未选中状态.因此,我想找到一种方法来手动触发cb2事件,以便在仅检查cb1时一次检查所有3个框.如果有人给我提示,我将不胜感激.
解决方法:
使用wx.PostEvent …像这样:
class launcherWindow(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, parent=None, title='New Window')
#now add the main body, start with a panel
panel = wx.Panel(self)
#instantiate a new dropdown
self.productDropDown = wx.ComboBox(panel, size=wx.DefaultSize, style = wx.CB_READONLY)
#get the products and product subtypes
self.productDict = self.getProductsAndSubtypes()
#setup subtypes first, just in case, since onProductSelection will reference this
self.productSubtypeDropDown = wx.ComboBox(panel, size=wx.DefaultSize, style = wx.CB_READONLY)
#add products
for product in self.productDict.keys():
self.productDropDown.Append(product)
#bind selection event
self.productDropDown.Bind(wx.EVT_COMBOBOX, self.onProductSelection)
#set default selection
self.productDropDown.SetSelection(0)
#pretend that we clicked the product selection, so it's event gets called
wx.PostEvent(self.productDropDown, wx.CommandEvent(wx.wxEVT_COMMAND_COMBOBOX_SELECTED))
#now add the dropdown to a sizer, set the sizer for the panel, fit the panel, etc...
def onProductSelection(self, event):
productSelected = self.productDropDown.GetStringSelection()
productSubtypes = self.productDict[productSelected]
#clear any existing product subtypes, since each product may have different ones
self.productSubtypeDropDown.Clear()
for productSubtype in productSubtypes:
self.productSubtypeDropDown.Append(productSubtype)
#select the first item by default
self.productSubtypeDropDown.SetSelection(0)
标签:event-handling,wxpython,python 来源: https://codeday.me/bug/20191101/1984542.html
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