使用DC即時繪製wx.BitMapButtons？

Question

我目前能夠得到這個去做大部分我想要的。它根據文本文件中的行繪製按鈕，並處理不同按鈕狀態的外觀。現在真正絆倒我的是當self.input寫入文本文件時，我不知道如何讓它重新繪製所有內容以基於新文本添加或更新按鈕。我試過Update,Refresh,Show (False)然後Show(True)，我很難過。

import wx 
import mmap 
import re 

class pt: 
    with open('note.txt', "r+") as Note: 
     buf = mmap.mmap(Note.fileno(), 0) 
     TL = 0 
     readline = buf.readline 
     while readline(): 
      TL += 1 
    Note.closed 

class MainWindow(wx.Frame): 

    def __init__(self, parent, title): 
     w, h = wx.GetDisplaySize() 
     x = w * 0 
     y = h - bdepth 

     wx.Frame.__init__(self, parent, title = title, pos = (x, y), size = (200,bdepth), style = wx.STAY_ON_TOP) 

     self.input = wx.TextCtrl(self, -1, "", (6, pt.TL * 64 + 4), (184, 24)) 
     self.Bind(wx.EVT_TEXT_ENTER, self.OnEnter, self.input) 

     self.__DoButtons()    

     self.Show(True) 

    def __DoButtons(self): 

     Note = open('note.txt', "r+") 

     for i, line in enumerate(Note): 

      strip = line.rstrip() 
      todo = strip.lstrip('!') 

      self.check = re.match('!', strip) 
      self.priority = re.search('(\!$)', strip) 

      checkmark = wx.Image('check.bmp', wx.BITMAP_TYPE_BMP) 
      bullet = wx.Image('bullet.bmp', wx.BITMAP_TYPE_BMP) 
      exclaim = wx.Image('exclaim.bmp', wx.BITMAP_TYPE_BMP) 

      solid = wx.EmptyBitmap(200,64,-1) 
      dc = wx.MemoryDC() 
      dc.SelectObject(solid) 
      solidpen = wx.Pen(wx.Colour(75,75,75),wx.SOLID) 
      dc.SetPen(solidpen) 
      dc.DrawRectangle(0, 0, 200, 64) 
      dc.SetTextForeground(wx.Colour(255, 255, 255)) 
      dc.DrawBitmap(wx.BitmapFromImage(bullet, 32), 10, 28) 
      dc.DrawText(todo, 30, 24) 
      dc.SelectObject(wx.NullBitmap) 

      checked = wx.EmptyBitmap(200,64,-1) 
      dc = wx.MemoryDC() 
      dc.SelectObject(checked) 
      checkedpen = wx.Pen(wx.Colour(50,50,50),wx.SOLID) 
      dc.SetPen(checkedpen) 
      dc.DrawRectangle(0, 0, 200, 50) 
      dc.SetTextForeground(wx.Colour(200, 255, 0)) 
      dc.DrawBitmap(wx.BitmapFromImage(checkmark, 32), 6, 24) 
      dc.DrawText(todo, 30, 24) 
      dc.SelectObject(wx.NullBitmap) 

      hover = wx.EmptyBitmap(200,64,-1) 
      dc = wx.MemoryDC() 
      dc.SelectObject(hover) 
      hoverpen = wx.Pen(wx.Colour(100,100,100),wx.SOLID) 
      dc.SetPen(hoverpen) 
      dc.DrawRectangle(0, 0, 200, 64) 
      dc.SetTextForeground(wx.Colour(255, 255, 255)) 
      dc.DrawBitmap(wx.BitmapFromImage(bullet, 32), 10, 28) 
      dc.DrawText(todo, 30, 24) 
      dc.SelectObject(wx.NullBitmap) 

      important = wx.EmptyBitmap(200,64,-1) 
      dc = wx.MemoryDC() 
      dc.SelectObject(important) 
      importantpen = wx.Pen(wx.Colour(75,75,75),wx.SOLID) 
      dc.SetPen(importantpen) 
      dc.DrawRectangle(0, 0, 200, 50) 
      dc.SetTextForeground(wx.Colour(255, 180, 0)) 
      dc.DrawBitmap(wx.BitmapFromImage(exclaim, 32), 6, 24) 
      dc.DrawText(todo, 30, 24) 
      dc.SelectObject(wx.NullBitmap) 

      importanthover = wx.EmptyBitmap(200,64,-1) 
      dc = wx.MemoryDC() 
      dc.SelectObject(importanthover) 
      importanthoverpen = wx.Pen(wx.Colour(100,100,100),wx.SOLID) 
      dc.SetPen(importanthoverpen) 
      dc.DrawRectangle(0, 0, 200, 50) 
      dc.SetTextForeground(wx.Colour(255, 180, 0)) 
      dc.DrawBitmap(wx.BitmapFromImage(exclaim, 32), 6, 24) 
      dc.DrawText(todo, 30, 24) 
      dc.SelectObject(wx.NullBitmap) 

      if self.check is None and self.priority is None: 
       bmp = solid 
      elif self.priority is None: 
       bmp = checked 
      else: 
       bmp = important  

      b = wx.BitmapButton(self, i + 800, bmp, (0, i * 64), (solid.GetWidth(), solid.GetHeight()), style = wx.NO_BORDER) 
      b.SetBitmapDisabled(checked) 

      if self.check is None and self.priority is None: 
       b.SetBitmapHover(hover) 
      elif self.priority is None: 
       b.SetBitmapHover(checked) 
      else: 
       b.SetBitmapHover(importanthover) 

     Note.closed 

    def OnClick(self, event): 
     button = event.GetEventObject() 
     button.None 
     print('cheese') 

    def OnEnter(self, event): 
     editnote = open('note.txt', 'r+') 
     editnote.write(self.input.GetValue()) 
     editnote.close() 
     self.Update() 

bdepth = pt.TL * 64 + 32 
app = wx.App(False) 
frame = MainWindow(None, "Sample editor") 
app.MainLoop() 

Answer 1

Theres沒有意思要自己調用Update() Refresh()等。他們不會自動創建你的按鈕，你需要這樣做。

對於初學者我會重構你__DoButtons()分爲兩個方法，一個創建你的按鈕，另外從你的文件中獲得您的按鈕數據，並將其格式化爲合適的數據結構-a list（並處理相應的如果需要的話）然後你可以傳遞給你的新的__DoButtons方法（它實際上是創建按鈕）。

在你onEnter()你需要打電話給你__DoButtons()方法，並通過適當的數據，如果你只需要添加新的按鈕，你爲什麼不直接從textEntry部件獲取數據並保存自己的閱讀麻煩它來自文件。