wxPython实现画图板

本文实例为大家分享了wxPython画图板展示的具体代码，供大家参考，具体内容如下

#coding:GBK
'''
Created on 2012-3-22
@author: cWX53049
'''
import wx
import time
from bsddb.test.test_pickle import cPickle
import os

_formatStr="%Y-%m-%d %H:%M:%S"

class SkethWindow(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)#创建一个pen
    self.lines=[]
    self.curLine=[]
    self.pos=(0,0)
    self.InitBuffer()
    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_SIZE, self.OnSize)
    self.Bind(wx.EVT_IDLE,self.OnIdle)
    self.Bind(wx.EVT_PAINT, self.OnPaint)
  def InitBuffer(self):
    size = self.GetClientSize()
    self.buffer=wx.EmptyBitmap(size.width,size.height)
    dc = wx.BufferedDC(None,self.buffer)
    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()#得到鼠标的位置
    self.CaptureMouse()#捕获鼠标
  def OnLeftUp(self,event):
    if self.HasCapture():
      self.lines.append((self.color,
               self.thickness,
               self.curLine))
      self.curLine=[]
      self.ReleaseMouse()#释放鼠标
  def OnMotion(self,event):
    if event.Dragging() and event.LeftIsDown():#确定是否在拖动
      dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)#创建另一个
      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#处理一个resize事件
  def OnIdle(self,event):
    if self.reInitBuffer:
      self.InitBuffer()
      self.Refresh()
  def OnPaint(self,event):
    wx.BufferedPaintDC(self,self.buffer)
  def DrawLines(self,dc):
    for colur,thickness,line in self.lines:
      pen = wx.Pen(colur,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 SkethFrame(wx.Frame):
  def __init__(self,parent):
    self.title="绘画窗体"
    wx.Frame.__init__(self,parent,-1,self.title,size=(500,500))
    self.sketh=SkethWindow(self,-1)
    self.InitStatusBar()
    self.sketh.Bind(wx.EVT_MOTION, self.showPosition)
    self.initMenuBar()
    self.wildcard="Sketch file(*.sketch)|All files(*.*)|*.*"
    self.fileName=""

  def OnNew(self,event):
    pass
  def OnOpen(self,event):
    pass
  def OnSave(self,event):
    if not self.fileName:
      self.OnSaveAs(event)
    else:
      self.SaveFile()

  def SaveFile(self):
    if self.fileName:
      data = self.sketh.GetLinesData()
      f = open(self.fileName,'w')
      cPickle.dump(data, f)
      f.close()
  def OnSaveAs(self,event):
    dlf = wx.FileDialog(self,"Sketch file",os.getcwd(),style=wx.SAVE|wx.OVERWRITE_PROMPT)
    if dlf.ShowModal()==wx.ID_OK:
      fileName = dlf.GetPath()
      if not os.path.splitext(fileName)[1]:
        fileName=fileName+'.sketch'
        self.fileName=fileName
        self.SaveFile()
    self.SetTitle(self.title+'--'+self.fileName)
    dlf.Destroy()
  def OnColor(self,event):
    pass
  def OnCloseWindow(self,event):
    self.Destroy()
  def menuData(self):
    return [("&File",(
         ("&New","New Sketch file",self.OnNew),
         ("&Open","open sketch file",self.OnOpen),
         ("&Save","save sktech file",self.OnSave),
         ("","",""),
         ("&Color",(
         ("&Black","",self.OnColor,wx.ITEM_RADIO),
         ("&Red","",self.OnColor,wx.ITEM_RADIO),
         ("&Red","",self.OnColor,wx.ITEM_RADIO),
         ("&Blue","",self.OnColor,wx.ITEM_RADIO))),
         ("","",""),
         ("&Quit","quit sketch ",self.OnCloseWindow)))]  

  def initMenuBar(self):
    menuBar=wx.MenuBar()
    for eachMenu in self.menuData():
      eachMenuLabel = eachMenu[0]
      eachMenuItems = eachMenu[1]
      menuBar.Append(self.createMenu(eachMenuItems),eachMenuLabel)
    self.SetMenuBar(menuBar)   

  def createMenu(self,menuData):
    menu = wx.Menu()
    for eachMenu in menuData:
      if len(eachMenu)==2:
        label = eachMenu[0]
        subBar =self.createMenu(eachMenu[1])
        menu.AppendMenu(wx.NewId(),label,subBar)
      else:
        self.createMenuItem(menu,*eachMenu)
    return menu

  def createMenuItem(self,menu,label,status,handler,kind=wx.ITEM_NORMAL):
    if not label:
      menu.AppendSeparator()
      return
    menuItem=menu.Append(-1,label,status,kind)
    self.Bind(wx.EVT_MENU,handler,menuItem)    

  def InitStatusBar(self):
    self.statusBar=self.CreateStatusBar()
    self.statusBar.SetFieldsCount(4)
    self.statusBar.SetStatusWidths([-1,-2,-2,-2])
    self.timer=wx.Timer(self)
    self.Bind(wx.EVT_TIMER, self.updateTime, self.timer)
    self.timer.Start(1000)
    self.statusBar.SetStatusText("Time is %s"%time.strftime(_formatStr,time.localtime()),3)
    self.statusBar.SetStatusText("Pos (0,0)",1)
    self.statusBar.SetStatusText("Cur Line 0",2)
    self.statusBar.SetStatusText("Lines 0" ,3)

  def showPosition(self,event):
    self.statusBar.SetStatusText("Pos %s"%str(event.GetPositionTuple()),0)
    self.statusBar.SetStatusText("Cur Line %s"%len(self.sketh.curLine),1)
    self.statusBar.SetStatusText("Lines %s"%len(self.sketh.lines),2)
    event.Skip() 

  def updateTime(self,event):
    self.statusBar.SetStatusText("Time is %s"%time.strftime(_formatStr,time.localtime()),3)

if __name__=="__main__":
  app = wx.PySimpleApp(False)
  frame=SkethFrame(None)
  frame.Center()
  frame.Show(True)
  app.MainLoop() 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。