Question

我正在尝试创建聊天客户端，我获取用户输入并将其显示在我想要绘制的白色矩形上。我尝试在面板上绘制矩形但是我收到此错误

Traceback (most recent call last):
  File "C:\Python27\client with gui.py", line 26, in <module>
    frame = WindowFrame(None, 'ChatClient')
  File "C:\Python27\client with gui.py", line 12, in __init__
    self.panel.Bind(wx.EVT_PAINT, self.OnPaint)
AttributeError: 'WindowFrame' object has no attribute 'panel'


import socket
import wx

class WindowFrame(wx.Frame):
    def __init__(self, parent, title):
        wx.Frame.__init__(self, parent, title = title, size=(500, 400))
        panel=wx.Panel(self)
        panel.SetBackgroundColour("#E6E6E6")
        self.control = wx.TextCtrl(panel, style = wx.TE_MULTILINE, size =(410, 28), pos=(0,329))

        sendbutton=wx.Button(panel, label ="Send", pos =(414,325), size=(65,35))
        self.panel.Bind(wx.EVT_PAINT, self.OnPaint)

        self.Centre()
        self.Show()


    def OnPaint(self, event):
        dc = wx.PaintDC(self)
        dc.SetPen(wx.Pen('#d4d4d4'))
        dc.SetBrush(wx.Brush('#c56c00'))
        dc.DrawRectangle(10, 15, 90, 60)
        self.Show(True)
if __name__=="__main__": 
    app = wx.App(False)
    frame = WindowFrame(None, 'ChatClient')
    app.MainLoop()

Answer 1

我相信我已经在OP的other question中回答了这个问题，这与此基本相同。

def OnPaint(self, event):
    dc = wx.PaintDC(self.panel)  # <<< This was changed
    dc.SetPen(wx.Pen('#d4d4d4'))
    dc.SetBrush(wx.Brush('#c56c00'))
    dc.DrawRectangle(10, 15, 90, 60)

您想要绘制到面板，而不是框架。在OP的代码中，他们告诉wx.PaintDC绘制到self，它指的是框架。我不知道为什么这会在一个操作系统上起作用，除非偶然。它对@ user667648起作用的事实很奇怪。我会把它归档为bug。绘制到面板的正确方法是上面的。

Answer 2

这一行：

    self.panel.Bind(wx.EVT_PAINT, self.OnPaint)

应该是：

    panel.Bind(wx.EVT_PAINT, self.OnPaint)

您的类没有属性panel，但它在init中有一个名为panel的局部变量。

或者，您可以考虑将面板设为属性：

import socket
import wx

class WindowFrame(wx.Frame):
    def __init__(self, parent, title):
        wx.Frame.__init__(self, parent, title = title, size=(500, 400))
        self.panel=wx.Panel(self)
        self.panel.SetBackgroundColour("#E6E6E6")
        self.control = wx.TextCtrl(self.panel, style = wx.TE_MULTILINE, size =(410, 28), pos=(0,329))

        sendbutton=wx.Button(self.panel, label ="Send", pos =(414,325), size=(65,35))
        self.panel.Bind(wx.EVT_PAINT, self.OnPaint)

        self.Centre()
        self.Show()


    def OnPaint(self, event):
        dc = wx.PaintDC(self)
        dc.SetPen(wx.Pen('#d4d4d4'))
        dc.SetBrush(wx.Brush('#c56c00'))
        dc.DrawRectangle(10, 15, 90, 60)
        self.Show(True)
if __name__=="__main__": 
    app = wx.App(False)
    frame = WindowFrame(None, 'ChatClient')
    app.MainLoop()

enter image description here

编辑：正如迈克指出绘图程序还有另一个问题。有趣的是我的电脑没有抱怨这个......

wxpython不会在面板上绘制矩形

2 个答案: