问题描述
所以这里的目标是从用户那里获取输入并显示来自 Excel 工作表的相关数据。 我们的问题是一个相当小但令人恼火的问题...... 当输入没有从数据库中获得匹配项时,我们将显示一条消息,指出输入号码无效。我们使用辅助函数将输出格式化为 this
这是格式化代码:
def makeRMAString(self,RMAnum,DMRnum,serial,status,cdate,udate):
rma_string = 'RMA#\t: {}\nDMR#\t: {} \nSerial#\t: {}\nStatus\t: {}\nCreated\t: {}\nUpdate\t: {}'
return rma_string.format(RMAnum,udate)
屏幕截图显示,当输入与数据库中的某些内容匹配时,一切正常。如果没有,我们执行以下行:
self.rmaData.Label = self.makeRMAString('Invalid RMA number','','')
这就是问题发生的地方; 'Invalid RMA number' 被推到下一行,而不是格式很好的输出,就好像添加了下一行: like this
我从命令提示符启动以查看输出,在那里看起来很好。 Here's proof
我们使用 wxpython 的 BoxSizer 来帮助:
self.rmaData = wx.StaticText(self.panel,wx.ID_ANY,self.makeRMAString('',''))
self.sizer_rmaHoriz = wx.BoxSizer(wx.HORIZONTAL)
self.sizer_rmaHoriz.Add(self.rmaData,4,wx.ALIGN_LEFT|wx.CENTER,15)
self.rmaData.SetFont(font)
我们使用的是 python 2.7.10
解决方法
应要求提供 Grid sizer 演示。
我选择了 GridBagSizer
,它似乎最适合您的要求。
import wx
data = [
["99550","539761","016833-0695","Shipped","03/27/20","Unknown"],["99551","xxxxxx-xxxx","03/22/20",["99554","Warehouse 1","01/12/19",['Invalid RMA number','',''],["99555","777777-0695","Warehouse 2","02/27/20",["99556","016833-XXXX","03/24/20"],'']
]
class Example(wx.Frame):
def __init__(self,parent,title):
super(Example,self).__init__(parent,title = title)
self.InitUI()
self.Centre()
self.Show()
def InitUI(self):
self.idx = 0
panel = wx.Panel(self)
sizer = wx.GridBagSizer(0,0)
self.rma = wx.TextCtrl(panel,style=wx.TE_PROCESS_ENTER)
sizer.Add(self.rma,pos = (0,1),flag = wx.ALIGN_CENTRE_VERTICAL)
EnterB = wx.Button(panel,label = "Enter RMA")
sizer.Add(EnterB,2),flag = wx.ALL,border = 5)
text = wx.StaticText(panel,label = "RMA :")
sizer.Add(text,pos = (1,0),flag = wx.ALIGN_CENTRE_VERTICAL|wx.ALL,border = 5)
self.tc = wx.TextCtrl(panel,style=wx.TE_READONLY,size=(150,-1))
sizer.Add(self.tc,flag = wx.EXPAND)
text1 = wx.StaticText(panel,label = "DMR :")
sizer.Add(text1,pos = (2,border = 5)
self.tc1 = wx.TextCtrl(panel,style=wx.TE_READONLY)
sizer.Add(self.tc1,flag = wx.EXPAND)
text2 = wx.StaticText(panel,label = "Serial :")
sizer.Add(text2,pos = (3,border = 5)
self.tc2 = wx.TextCtrl(panel,style=wx.TE_READONLY)
sizer.Add(self.tc2,flag = wx.EXPAND)
text3 = wx.StaticText(panel,label = "Status :")
sizer.Add(text3,pos = (4,border = 5)
self.tc3 = wx.TextCtrl(panel,style=wx.TE_READONLY)
sizer.Add(self.tc3,flag = wx.EXPAND)
text4 = wx.StaticText(panel,label = "Created:")
sizer.Add(text4,pos = (5,border = 5)
self.tc4 = wx.TextCtrl(panel,style=wx.TE_READONLY)
sizer.Add(self.tc4,flag = wx.EXPAND)
text5 = wx.StaticText(panel,label = "Update :")
sizer.Add(text5,pos = (6,flag = wx.ALIGN_CENTRE_VERTICAL)
self.tc5 = wx.TextCtrl(panel,style=wx.TE_READONLY)
sizer.Add(self.tc5,flag = wx.EXPAND)
Next = wx.Button(panel,label = "Demo")
sizer.Add(Next,pos = (7,1))
panel.SetSizerAndFit(sizer)
EnterB.Bind(wx.EVT_BUTTON,self.OnRma)
self.rma.Bind(wx.EVT_TEXT_ENTER,self.OnRma)
Next.Bind(wx.EVT_BUTTON,self.OnNext)
def OnRma(self,event):
rma = self.rma.GetValue()
idx = [i for i,e in enumerate(data) if e[0] == rma]
if idx:
self.idx = idx[0]
self.OnNext(None)
else:
self.tc.SetValue('Invalid RMA number')
self.tc1.SetValue('')
self.tc2.SetValue('')
self.tc3.SetValue('')
self.tc4.SetValue('')
self.tc5.SetValue('')
def OnNext(self,event):
self.rma.SetValue('')
self.tc.SetValue(data[self.idx][0])
self.tc1.SetValue(data[self.idx][1])
self.tc2.SetValue(data[self.idx][2])
self.tc3.SetValue(data[self.idx][3])
self.tc4.SetValue(data[self.idx][4])
self.tc5.SetValue(data[self.idx][5])
self.idx += 1
if self.idx > len(data) - 1:
self.idx = 0
app = wx.App()
Example(None,title = 'GridBag Demo')
app.MainLoop()
用途:
- 输入 RMA 编号(99550、99551、99554、99555 或 99556),然后按 Enter 或
Enter Rma
按钮 - 输入一些无效的 RMA 并按 Enter 或
Enter Rma
按钮 - 点击
Demo
按钮,它将滚动浏览数据