[已解决]wxPython问题求助

A.Lyapunov

想实现一个画图板。运行下面的代码出现了一些问题：
Traceback (most recent call last):
  File "E:\Python\installation path\Pythondebug\SketchWindow.py", line 38, in OnLeftDown
    self.pos = event.GetPositionTuple() #5 得到鼠标的位置
AttributeError: 'MouseEvent' object has no attribute 'GetPositionTuple'

Traceback (most recent call last):
  File "E:\Python\installation path\Pythondebug\SketchWindow.py", line 49, in OnMotion
    dc = wx.BufferedDc(wx.ClientDC(self),self.buffer) #9 创建另一个缓存的上下文
AttributeError: module 'wx' has no attribute 'BufferedDc'

Traceback (most recent call last):
  File "E:\Python\installation path\Pythondebug\SketchWindow.py", line 46, in OnLeftUp
    self.ReleaseMouse() #7 释放鼠标
wx._core.wxAssertionError: C++ assertion ""!wxMouseCapture::stack.empty()"" failed at ..\..\src\common\wincmn.cpp(3370) in wxWindowBase::ReleaseMouse(): Releasing mouse capture but capture stack empty?

1. import wx
   
2. class SketchWindow(wx.Window):
   
3.     def __init__(self,parent,ID):
   
4.         wx.Window.__init__(self,parent,ID)
   
5.         self.SetBackgroundColour('White')
   
6.         self.color = 'Black'
   
7.         self.thickness = 1
   
8.         self.pen = wx.Pen(self.color,self.thickness,wx.SOLID) #1 创建一个wx.Pen对象
   
9.         self.lines = []
   
10.         self.curLine = []
    
11.         self.pos = (0,0)
    
12.         self.InitBuffer()
    
13.     #2 连接事件
    
14.         self.Bind(wx.EVT_LEFT_DOWN,self.OnLeftDown)
    
15.         self.Bind(wx.EVT_LEFT_UP,self.OnLeftUp)
    
16.         self.Bind(wx.EVT_MOTION,self.OnMotion)
    
17.         self.Bind(wx.EVT_SIZE,self.OnSize)
    
18.         self.Bind(wx.EVT_IDLE,self.OnIdle)
    
19.         self.Bind(wx.EVT_PAINT,self.OnPaint)
    
20.     def InitBuffer(self):
    
21.         size = self.GetClientSize()
    
22.     #3 创建一个缓存的设备上下文
    
23.         self.buffer = wx.Bitmap(size.width,size.height)
    
24.         dc = wx.BufferedDC(None,self.buffer)
    
25.     #4 使用设备上下文
    
26.         dc.SetBackground(wx.Brush(self.GetBackgroundColour()))
    
27.         dc.Clear()
    
28.         self.DrawLines(dc)
    
29.         self.reInitBuffer = False
    
30.     def GetLinesData(self):
    
31.         return self.lines[:]
    
32.     def SetLinesData(self,lines):
    
33.         self.lines = lines[:]
    
34.         self.InitBuffer()
    
35.         self.Refresh()
    
36.     def OnLeftDown(self,event):
    
37.         self.curLine = []
    
38.         self.pos = event.GetPositionTuple() #5 得到鼠标的位置
    
39.         self.CaptureMouse() #6 捕获鼠标
    
40.     def OnLeftUp(self,event):   
    
41.         if self.HasCapture():
    
42.             self.lines.append((self.color,
    
43.                                self.thickness,
    
44.                                self.curLine))
    
45.         self.curLine = []
    
46.         self.ReleaseMouse() #7 释放鼠标
    
47.     def OnMotion(self,event):
    
48.         if event.Dragging() and event.LeftIsDown(): #8确定是否在拖动
    
49.             dc = wx.BufferedDc(wx.ClientDC(self),self.buffer) #9 创建另一个缓存的上下文
    
50.             self.drawMotion(dc,event)
    
51.         event.Skip()
    
52.     #10 绘画到设备上下文
    
53.     def drawMotion(self,dc,event):
    
54.         dc.SetPen(self.pen)
    
55.         newPos = event.GetPositionTuple()
    
56.         coords = self.pos+newPos
    
57.         self.curLine.append(coords)
    
58.         dc.DrawLine(*coords)
    
59.         self.pos = newPos
    
60.     def OnSize(self,event):
    
61.         self.reInitBuffer = True #11 处理一个resize事件
    
62.     def OnIdle(self,event): #12 空闲时的处理
    
63.         if self.reInitBuffer:
    
64.             self.InitBuffer()
    
65.             self.Refresh(False)
    
66.     def OnPaint(self,event):
    
67.         dc = wx.BufferedPaintDC(self,self.buffer) #13 处理一个painta(描绘请求)事件
    
68.     #14 绘制所有的线条
    
69.     def DrawLines(self,dc):
    
70.         for colour,thickness,line in self.lines:
    
71.             pen = wx.Pen(colour,thickness,wx.SOLID)
    
72.             dc.SetPen(pen)
    
73.             for coords in line:
    
74.                 dc.DrawLine(*coords)
    
75.     def SetColor(self,color):
    
76.         self.color = color
    
77.         self.pen = wx.Pen(self.color,self.thickness,wx.SOLID)
    
78.     def SetThickness(self,num):
    
79.         self.thickness = num
    
80.         self.pen = wx.Pen(self.color,self.thickness,wx.SOLID)
    
81. class SketchFrame(wx.Frame):
    
82.     def __init__(self,parent):
    
83.         wx.Frame.__init__(self,parent,-1,'Sketch Frame',
    
84.                           size=(800,600))
    
85.         self.sketch =SketchWindow(self,-1)
    
86. if __name__ == '__main__':
    
87.     app = wx.App()
    
88.     frame = SketchFrame(None)
    
89.     frame.Show(True)
    
90.     app.MainLoop()
    
91.         
    
92.    
    
93.         
    

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最佳答案

月排行榜 / 总排行榜

zltzlt

2020-7-31 22:54:51

你这代码是网上找的吧。网上的代码大多都过时了

跳转到最佳答案楼层

zltzlt

你这代码是网上找的吧。网上的代码大多都过时了