wxPython问题求助
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?
import wx
class SketchWindow(wx.Window):
def __init__(self,parent,ID):
wx.Window.__init__(self,parent,ID)
self.SetBackgroundColour('White')
self.color = 'Black'
self.thickness = 1
self.pen = wx.Pen(self.color,self.thickness,wx.SOLID) #1 创建一个wx.Pen对象
self.lines = []
self.curLine = []
self.pos = (0,0)
self.InitBuffer()
#2 连接事件
self.Bind(wx.EVT_LEFT_DOWN,self.OnLeftDown)
self.Bind(wx.EVT_LEFT_UP,self.OnLeftUp)
self.Bind(wx.EVT_MOTION,self.OnMotion)
self.Bind(wx.EVT_SIZE,self.OnSize)
self.Bind(wx.EVT_IDLE,self.OnIdle)
self.Bind(wx.EVT_PAINT,self.OnPaint)
def InitBuffer(self):
size = self.GetClientSize()
#3 创建一个缓存的设备上下文
self.buffer = wx.Bitmap(size.width,size.height)
dc = wx.BufferedDC(None,self.buffer)
#4 使用设备上下文
dc.SetBackground(wx.Brush(self.GetBackgroundColour()))
dc.Clear()
self.DrawLines(dc)
self.reInitBuffer = False
def GetLinesData(self):
return self.lines[:]
def SetLinesData(self,lines):
self.lines = lines[:]
self.InitBuffer()
self.Refresh()
def OnLeftDown(self,event):
self.curLine = []
self.pos = event.GetPositionTuple() #5 得到鼠标的位置
self.CaptureMouse() #6 捕获鼠标
def OnLeftUp(self,event):
if self.HasCapture():
self.lines.append((self.color,
self.thickness,
self.curLine))
self.curLine = []
self.ReleaseMouse() #7 释放鼠标
def OnMotion(self,event):
if event.Dragging() and event.LeftIsDown(): #8确定是否在拖动
dc = wx.BufferedDc(wx.ClientDC(self),self.buffer) #9 创建另一个缓存的上下文
self.drawMotion(dc,event)
event.Skip()
#10 绘画到设备上下文
def drawMotion(self,dc,event):
dc.SetPen(self.pen)
newPos = event.GetPositionTuple()
coords = self.pos+newPos
self.curLine.append(coords)
dc.DrawLine(*coords)
self.pos = newPos
def OnSize(self,event):
self.reInitBuffer = True #11 处理一个resize事件
def OnIdle(self,event): #12 空闲时的处理
if self.reInitBuffer:
self.InitBuffer()
self.Refresh(False)
def OnPaint(self,event):
dc = wx.BufferedPaintDC(self,self.buffer) #13 处理一个painta(描绘请求)事件
#14 绘制所有的线条
def DrawLines(self,dc):
for colour,thickness,line in self.lines:
pen = wx.Pen(colour,thickness,wx.SOLID)
dc.SetPen(pen)
for coords in line:
dc.DrawLine(*coords)
def SetColor(self,color):
self.color = color
self.pen = wx.Pen(self.color,self.thickness,wx.SOLID)
def SetThickness(self,num):
self.thickness = num
self.pen = wx.Pen(self.color,self.thickness,wx.SOLID)
class SketchFrame(wx.Frame):
def __init__(self,parent):
wx.Frame.__init__(self,parent,-1,'Sketch Frame',
size=(800,600))
self.sketch =SketchWindow(self,-1)
if __name__ == '__main__':
app = wx.App()
frame = SketchFrame(None)
frame.Show(True)
app.MainLoop()
你这代码是网上找的吧。网上的代码大多都过时了
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