從Tkinter中的Entry小部件將參數傳遞給動態創建的Button

Question

我正在尋找一種方法，如何將條目小部件的內容傳遞給按鈕。 對我而言，最復雜的部分是從給定的XML結構動態創建的按鈕和輸入小部件（請參見“ xmlString”），其中描述了具有按鈕和參數的GUI，按鈕和參數的數量是可變的。

我簡化了XML並制作了演示代碼。 我知道lambda函數，但是我不知道如何使用動態創建的條目窗口小部件來執行此操作。

from Tkinter import *
import xml.etree.ElementTree as ET


rootframe = Tk()

def runScript(text = 'default text'):
    print 'runScript %s'%text

xmlString = '''
<window>
      <Tab id="tabpage5" name="Debugging" type="custom">
        <command dest="1" mode="CONFIG" unit="4" id="SET_TIMEOUT" type="COMMAND">
          <initiator name="Set Timeout" type="button" />
          <parameter editable="true" param_name="PARAM1">31536000</parameter>
        </command>
        <command dest="1" mode="CONFIG" unit="4" id="SET_thing" type="COMMAND">
          <initiator name="Set Timeout" type="button" />
          <parameter param_name="PARAM1" >31536000</parameter>
          <parameter param_name="PARAM2">5</parameter>
        </command>
        <command />
        </Tab>        
</window>
'''

xmlRoot  = ET.fromstring(xmlString)

for tab in xmlRoot.iter('Tab'):
    row = 0
    column = 0

    for command in tab.iter('command'):
        for tag in command.iter() :
            #not sure why command tag is here but skipping it
            if tag.tag == 'command':
                pass
                continue
            if tag.tag == 'initiator' and tag.attrib['type'] == 'button':
                    button = Button(rootframe, text=tag.attrib['name'], command=lambda : runScript('nondefault text'))
                    button.grid(row=row, column=column, sticky='w')
                    column +=1
            elif tag.tag == 'parameter':
                    entry = Entry(rootframe)
                    entry.insert(0,tag.text)
                    entry.grid(row=row, column=column)
                    column +=1
        row +=1
        column = 0

rootframe.mainloop()

Answer 1

您可以保留所有創建條目的2D列表。 然后，當您要訪問它們時，只需插入行號。 實施示例：

from Tkinter import *
import xml.etree.ElementTree as ET


rootframe = Tk()

def runScript(text = 'default text', row=None):
    entries = entries_by_row[row] if row is not None else []
    print 'runScript {}. Contents of entries: {}'.format(text, [entry.get() for entry in entries])

xmlString = '''
<window>
      <Tab id="tabpage5" name="Debugging" type="custom">
        <command dest="1" mode="CONFIG" unit="4" id="SET_TIMEOUT" type="COMMAND">
          <initiator name="Set Timeout" type="button" />
          <parameter editable="true" param_name="PARAM1">31536000</parameter>
        </command>
        <command dest="1" mode="CONFIG" unit="4" id="SET_thing" type="COMMAND">
          <initiator name="Set Timeout" type="button" />
          <parameter param_name="PARAM1" >31536000</parameter>
          <parameter param_name="PARAM2">5</parameter>
        </command>
        <command />
        </Tab>        
</window>
'''

xmlRoot  = ET.fromstring(xmlString)

entries_by_row = []

for tab in xmlRoot.iter('Tab'):
    row = 0
    column = 0

    for command in tab.iter('command'):
        entries_by_row.append([])
        for tag in command.iter() :
            #not sure why command tag is here but skipping it
            if tag.tag == 'command':
                pass
                continue
            if tag.tag == 'initiator' and tag.attrib['type'] == 'button':
                    button = Button(rootframe, text=tag.attrib['name'], command=lambda row=row: runScript('nondefault text', row))
                    button.grid(row=row, column=column, sticky='w')
                    column +=1
            elif tag.tag == 'parameter':
                    entry = Entry(rootframe)
                    entry.insert(0,tag.text)
                    entry.grid(row=row, column=column)
                    column +=1
                    entries_by_row[-1].append(entry)
        row +=1
        column = 0

rootframe.mainloop()

單擊每個按鈕后的結果：

runScript nondefault text. Contents of entries: ['31536000']
runScript nondefault text. Contents of entries: ['31536000', '5']