wxpython 不会在面板上绘制矩形 [英] wxpython won't draw rectangle on panel

问题描述

我正在尝试制作聊天客户端，在其中获取用户输入并将其显示在我尝试绘制的白色矩形上.我尝试在面板上绘制矩形，但出现此错误

I am trying to make chat client where I get the user input and display it on the white rectangle I am trying to draw. I try drawing the rectangle on the panel but I get this error

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()

推荐答案

我相信我已经在 OP 的 其他问题，和这个基本一样.

I believe I answered this already in the OP's other question, which is basically the same as this one.

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运行，除非碰巧.它适用于@user667648 的事实很奇怪.我会将其归档为错误.绘制到面板的正确方法是以上.

You want to draw to the panel, NOT the frame. In the OP's code, they are telling wx.PaintDC to draw to self, which refers to the frame. I don't know why this would work on one OS except by happenstance. The fact that it worked for @user667648 is weird. I would file that as a bug. The proper way to draw to the panel is the above.

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