wxPython实现绘图小例子

更新时间：2020-08-08 15:00:01 作者：startmvc

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

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()

测试：