Question

我使用的是wxPython 2.8，在我的应用程序中，当触发指定事件时，我使用wx.ListBox添加一些字符串。每次触发该事件时，我需要在wx.ListBox的顶部添加一个字符串（其他字符串随后放置）。

如果我最初是带有以下字符串的wx.ListBox：

version: '3.3'

networks:
  kafka_example:
    driver: overlay

services:
  zookeeper-1:
    image: confluentinc/cp-zookeeper:5.0.1
    volumes:
      - '/volumedockerkafka/zookeeper-1/zookeeper_data:/var/lib/zookeeper:rw'  # mount point
      - '/volumedockerkafka/zookeeper-1/zookeeper_etc:/etc/zookeeper:rw'  # mount point
    environment:
      ZOOKEEPER_SERVER_ID: 1
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_SERVERS: zookeeper-1:2888:3888;zookeeper-2:2888:3888;zookeeper-3:2888:3888
      ZOOKEEPER_TICK_TIME: 2000
      ZOOKEEPER_INIT_LIMIT: 5
      ZOOKEEPER_SYNC_LIMIT: 2
    networks:
      - kafka_example

  zookeeper-2:
    image: confluentinc/cp-zookeeper:5.0.1
    volumes:
      - '/volumedockerkafka/zookeeper-2/zookeeper_data:/var/lib/zookeeper:rw'  # mount point
      - '/volumedockerkafka/zookeeper-2/zookeeper_etc:/etc/zookeeper:rw'  # mount point
    environment:
      ZOOKEEPER_SERVER_ID: 2
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_SERVERS: zookeeper-1:2888:3888;zookeeper-2:2888:3888;zookeeper-3:2888:3888
      ZOOKEEPER_TICK_TIME: 2000
      ZOOKEEPER_INIT_LIMIT: 5
      ZOOKEEPER_SYNC_LIMIT: 2
    networks:
      - kafka_example

  zookeeper-3:
    image: confluentinc/cp-zookeeper:5.0.1
    volumes:
      - '/volumedockerkafka/zookeeper-3/zookeeper_data:/var/lib/zookeeper:rw'  # mount point
      - '/volumedockerkafka/zookeeper-3/zookeeper_etc:/etc/zookeeper:rw'  # mount point
    environment:
      ZOOKEEPER_SERVER_ID: 3
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_SERVERS: zookeeper-1:2888:3888;zookeeper-2:2888:3888;zookeeper-3:2888:3888
      ZOOKEEPER_TICK_TIME: 2000
      ZOOKEEPER_INIT_LIMIT: 5
      ZOOKEEPER_SYNC_LIMIT: 2
    networks:
      - kafka_example

  message_queue_kafka-1:
    image: confluentinc/cp-kafka:5.0.1
    volumes:
      - '/volumedockerkafka/kafka-1/kafka_data:/var/lib/kafka/data:rw'  # mount point
      - '/volumedockerkafka/kafka-1/kafka_etc:/etc/kafka:rw'
    environment:
      KAFKA_ZOOKEEPER_CONNECT: 'zookeeper-1:2181,zookeeper-2:2181,zookeeper-3:2181'
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://message_queue_kafka-1:9092
      KAFKA_BROKER_ID: 1
      KAFKA_SESSION_TIMEOUT_MS: 60000
      KAFKA_HEARTBEAT_INTERVAL_MS: 20000
      KAFKA_REBALANCE_TIMEOUT_MS: 300000
    depends_on:
      - zookeeper-1
      - zookeeper-2
      - zookeeper-3
    networks:
      - kafka_example

  message_queue_kafka-2:
    image: confluentinc/cp-kafka:5.0.1
    volumes:
      - '/volumedockerkafka/kafka-2/kafka_data:/var/lib/kafka/data:rw'  # mount point
      - '/volumedockerkafka/kafka-2/kafka_etc:/etc/kafka:rw'
    environment:
      KAFKA_ZOOKEEPER_CONNECT: 'zookeeper-1:2181,zookeeper-2:2181,zookeeper-3:2181'
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://message_queue_kafka-2:9092
      KAFKA_BROKER_ID: 2
      KAFKA_SESSION_TIMEOUT_MS: 60000
      KAFKA_HEARTBEAT_INTERVAL_MS: 20000
      KAFKA_REBALANCE_TIMEOUT_MS: 300000
    depends_on:
      - zookeeper-1
      - zookeeper-2
      - zookeeper-3
    networks:
      - kafka_example

  message_queue_kafka-3:
    image: confluentinc/cp-kafka:5.0.1
    volumes:
      - '/volumedockerkafka/kafka-3/kafka_data:/var/lib/kafka/data:rw'  # mount point
      - '/volumedockerkafka/kafka-3/kafka_etc:/etc/kafka:rw'
    environment:
      KAFKA_ZOOKEEPER_CONNECT: 'zookeeper-1:2181,zookeeper-2:2181,zookeeper-3:2181'
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://message_queue_kafka-3:9092
      KAFKA_BROKER_ID: 3
      KAFKA_SESSION_TIMEOUT_MS: 60000
      KAFKA_HEARTBEAT_INTERVAL_MS: 20000
      KAFKA_REBALANCE_TIMEOUT_MS: 300000
    depends_on:
      - zookeeper-1
      - zookeeper-2
      - zookeeper-3
    networks:
      - kafka_example

，下一个事件在列表框中存储字符串“ Hello”；结果必须是：

World

有可能吗？我还没有找到任何简单的方法。

谢谢

Answer 1

仅使用InsertItems(list,pos)，其中pos为0-添加的项目将插入到声明的任何位置。即

import wx

class MainPanel(wx.Panel):
    def __init__(self, parent):
        wx.Panel.__init__(self, parent)
        initial_items = ['A reasonably long item that should cause a scrollbar to appear xxxxxx', 'another line', 'and another']
        self.listbox = wx.ListBox(self, style=wx.LB_HSCROLL)
        self.listbox.InsertItems(initial_items, 0)
        self.AddBtn = wx.Button(self, -1, "Add Item")
        self.AddBtn.Bind(wx.EVT_BUTTON, self.OnAdd)
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.listbox, 1, wx.EXPAND)
        sizer.Add(self.AddBtn, 0, wx.EXPAND)
        self.SetSizer(sizer)

    def OnAdd(self,evt):
        self.listbox.InsertItems(['Hello World'], 0) #add at position zero

class MainWindow(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, "ListBox", size=(400, 400))

        main_sizer = wx.BoxSizer(wx.VERTICAL)
        main_sizer.Add(MainPanel(self), 1, wx.EXPAND)
        self.SetSizer(main_sizer)

        self.Layout()
        self.Center()
        self.Show(True)


app = wx.App()
mw = MainWindow()
app.MainLoop()

在wx.ListBox开头添加字符串

1 个答案: