wxPython:菜单介绍

本节看看菜单的创建及使用，直接看代码。 ~~~ #!/usr/bin/env python # -*- coding: utf-8 -*- ''' Function:绘图 Input：NONE Output: NONE author: socrates blog:http://www.cnblogs.com/dyx1024/ date:2012-07-13 ''' 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) #状态栏 self.paint.Bind(wx.EVT_MOTION, self.OnPaintMotion) self.InitStatusBar() #创建菜单 self.CreateMenuBar() def InitStatusBar(self): self.statusbar = self.CreateStatusBar() #将状态栏分割为3个区域,比例为1:2:3 self.statusbar.SetFieldsCount(3) self.statusbar.SetStatusWidths([-1, -2, -3]) def OnPaintMotion(self, event): #设置状态栏1内容 self.statusbar.SetStatusText(u"鼠标位置：" + str(event.GetPositionTuple()), 0) #设置状态栏2内容 self.statusbar.SetStatusText(u"当前线条长度：%s" % len(self.paint.curLine), 1) #设置状态栏3内容 self.statusbar.SetStatusText(u"线条数目：%s" % len(self.paint.lines), 2) event.Skip() def MenuData(self): ''' 菜单数据 ''' #格式：菜单数据的格式现在是(标签, (项目))，其中：项目组成为：标签, 描术文字, 处理器, 可选的kind #标签长度为2，项目的长度是3或4 return [("&File", ( #一级菜单项 ("&New", "New paint file", self.OnNew), #二级菜单项 ("&Open", "Open paint file", self.OnOpen), ("&Save", "Save paint file", self.OnSave), ("", "", ""), #分隔线 ("&Color", ( ("&Black", "", self.OnColor, wx.ITEM_RADIO), #三级菜单项，单选 ("&Red", "", self.OnColor, wx.ITEM_RADIO), ("&Green", "", self.OnColor, wx.ITEM_RADIO), ("&Blue", "", self.OnColor, wx.ITEM_RADIO))), ("", "", ""), ("&Quit", "Quit", self.OnCloseWindow))) ] def CreateMenuBar(self): ''' 创建菜单 ''' menuBar = wx.MenuBar() for eachMenuData in self.MenuData(): menuLabel = eachMenuData[0] menuItems = eachMenuData[1] menuBar.Append(self.CreateMenu(menuItems), menuLabel) self.SetMenuBar(menuBar) def CreateMenu(self, menuData): ''' 创建一级菜单 ''' menu = wx.Menu() for eachItem in menuData: if len(eachItem) == 2: label = eachItem[0] subMenu = self.CreateMenu(eachItem[1]) menu.AppendMenu(wx.NewId(), label, subMenu) #递归创建菜单项 else: self.CreateMenuItem(menu, *eachItem) return menu def CreateMenuItem(self, menu, label, status, handler, kind = wx.ITEM_NORMAL): ''' 创建菜单项内容 ''' if not label: menu.AppendSeparator() return menuItem = menu.Append(-1, label, status, kind) self.Bind(wx.EVT_MENU, handler,menuItem) def OnNew(self, event): pass def OnOpen(self, event): pass def OnSave(self, event): pass def OnColor(self, event): ''' 更改画笔内容 ''' menubar = self.GetMenuBar() itemid = event.GetId() item = menubar.FindItemById(itemid) color = item.GetLabel() #获取菜单项内容 self.paint.SetColor(color) def OnCloseWindow(self, event): self.Destroy() if __name__ == '__main__': app = wx.PySimpleApp() frame = PaintFrame(None) frame.Show(True) app.MainLoop() ~~~ 测试：