[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?

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()
        
    
        

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