wxPython实现绘图小例子

本文实例为大家分享了wxPython绘图小例子的具体实现代码，供大家参考，具体内容如下

一个绘图的例子：

#!/usr/bin/env python# -*- coding: utf-8 -*- '''  Function:绘图  Input：NONE  Output: NONE  author: socrates  blog:http://www.cnblogs.com/dyx1024/  date:2012-07-11'''  import wx class PaintWindow(wx.Window):    def __init__(self, parent, id):      wx.Window.__init__(self, parent, id)      self.SetBackgroundColour("Red")      self.color = "Green"      self.thickness = 10          #创建一个画笔      self.pen = wx.Pen(self.color, self.thickness, wx.SOLID)      self.lines = []      self.curLine = []      self.pos = (0, 0)      self.InitBuffer()          #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()            #创建缓存的设备上下文      self.buffer = wx.EmptyBitmap(size.width, size.height)      dc = wx.BufferedDC(None, self.buffer)            #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 = []            #获取鼠标位置      self.pos = event.GetPositionTuple()      self.CaptureMouse()          def OnLeftUp(self, event):      if self.HasCapture():        self.lines.append((self.color,                  self.thickness,                  self.curLine))        self.curLine = []        self.ReleaseMouse()            def OnMotion(self, event):      if event.Dragging() and event.LeftIsDown():        dc = wx.BufferedDC(wx.ClientDC(self), self.buffer)        self.drawMotion(dc, event)      event.Skip()        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        def OnIdle(self, event):      if self.reInitBuffer:        self.InitBuffer()        self.Refresh(False)        def OnPaint(self, event):      dc = wx.BufferedPaintDC(self, self.buffer)          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 PaintFrame(wx.Frame):  def __init__(self, parent):    wx.Frame.__init__(self, parent, -1, "Panit Frame", size = (800, 600))    self.paint = PaintWindow(self, -1)    if __name__ == '__main__':  app = wx.PySimpleApp()  frame = PaintFrame(None)  frame.Show(True)  app.MainLoop()