wxpython入门(九)HTML和其他应用

wxpython入门(九)HTML和其他应用

参考书籍
http://wiki.woodpecker.org.cn/moin/WxPythonInAction

第十六章 应用中的HTML

显示HTML
example:

import wx.html

class MyHtmlFrame(wx.Frame):
    def __init__(self, parent, title):
        wx.Frame.__init__(self,parent,-1,title)
        html = wx.html.HtmlWindow(self)
        if "gtk2" in wx.PlatformInfo:
            html.SetStandardFonts()
        html.SetPage(
            "Here is some  <b>formatted</b>   <i><u>text</u></i>"
            "loaded from a  <font color=\"red\"> string </font>.")

app = wx.PySimpleApp()
frm = MyHtmlFrame(None, "Simple HTML")
frm.Show()
app.MainLoop()

从一个WEB页装载HTML，examples:

import wx
import wx.html

class MyHtmlFrame(wx.Frame):
    def __init__(self, parent, title):
        wx.Frame.__init__(self, parent, -1, title, size=(600,400))
        html = wx.html.HtmlWindow(self)
        if "gtk2" in wx.PlatformInfo:
            html.SetStandardFonts()
        wx.CallAfter(html.LoadPage,"http://www.wxpython.org")
app = wx.PySimpleApp()
frm = MyHtmlFrame(None, "Simple HTML Browser")
frm.Show()
app.MainLoop()

带有状态栏和标题栏的HTML窗口，examples:

import wx
import wx.html

class MyHtmlFrame(wx.Frame):
    def __init__(self, parent, title):
        wx.Frame.__init__(self, parent, -1, title, size=(600,400))
        self.CreateStatusBar()
        html = wx.html.HtmlWindow(self)
        if "gtk2" in wx.PlatformInfo:
            html.SetStandardFonts()
        html.SetRelatedFrame(self,self.GetTitle() + " -- %s")
        #关联HTML到框架
        html.SetRelatedStatusBar(0) #关联HTML到状态栏
        wx.CallAfter(html.LoadPage, "http://www.wxpython.org")

app = wx.PySimpleApp()
frm = MyHtmlFrame(None, "Simple HTML Browser")
frm.Show()
app.MainLoop()

如何增加对新标记的支持（略）

第十七章 wxPython的打印构架

（略）

第十八章 其它应用

剪贴板应用

examples:

import wx

t1_text = "test1"
t2_text = "test2"
class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self,None,title="Clipboard",size=(500,300))
        p = wx.Panel(self)
        # create the controls
        self.t1 = wx.TextCtrl(p,-1,t1_text,style=wx.TE_MULTILINE|wx.HSCROLL)
        self.t2 = wx.TextCtrl(p,-1,t2_text,style=wx.TE_MULTILINE|wx.HSCROLL)
        copy = wx.Button(p, -1, "Copy")
        paste = wx.Button(p, -1, "Paste")
        # setup the layout with sizers
        fgs = wx.FlexGridSizer(2, 2, 5, 5)
        fgs.AddGrowableRow(0)
        fgs.AddGrowableCol(0)
        fgs.AddGrowableCol(1)
        fgs.Add(self.t1, 0, wx.EXPAND)
        fgs.Add(self.t2, 0, wx.EXPAND)
        fgs.Add(copy, 0, wx.EXPAND)
        fgs.Add(paste, 0, wx.EXPAND)
        border = wx.BoxSizer()
        border.Add(fgs, 1, wx.EXPAND|wx.ALL, 5)
        p.SetSizer(border)
        # Bind events
        self.Bind(wx.EVT_BUTTON, self.OnDoCopy, copy)
        self.Bind(wx.EVT_BUTTON, self.OnDoPaste, paste)
    def OnDoCopy(self, evt):
        #Copy按钮的事件处理函数
        data = wx.TextDataObject()
        data.SetText(self.t1.GetValue())
        if wx.TheClipboard.Open():
            wx.TheClipboard.SetData(data)
            #将数据放置到剪贴板上
            wx.TheClipboard.Close()
        else:
            wx.MessageBox("Unable to open the clipboard", "Error")
    def OnDoPaste(self, evt):
        #Paste按钮的事件处理函数
        success = False
        data = wx.TextDataObject()
        if wx.TheClipboard.Open():
            success = wx.TheClipboard.GetData(data)
            #从剪贴板得到数据
            wx.TheClipboard.Close()
        if success:
            self.t2.SetValue(data.GetText())
            #更新文本控件
        else:
            wx.MessageBox(
                "There is no data in the clipboard in the required format",
                "Error")
app = wx.PySimpleApp()
frm = MyFrame()
frm.Show()
app.MainLoop()

简单的一个拖放源，examples:

import wx
class DragController(wx.Control):
    """
    Just a little control to handle dragging the text from a text
    control.We use a separate control so as to not interfere with
    the native drag-select functionality of the native text control.
    """
    def __init__(self, parent, source, size=(25,25)):
        wx.Control.__init__(self,parent,-1,size=size,style=wx.SIMPLE_BORDER)
        self.source = source
        self.SetMinSize(size)
        self.Bind(wx.EVT_PAINT, self.OnPaint)
        self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown)
    def OnPaint(self, evt):
        # draw a simple arrow
        dc = wx.BufferedPaintDC(self)
        dc.SetBackground(wx.Brush(self.GetBackgroundColour()))
        dc.Clear()
        w, h = dc.GetSize()
        y = h/2
        dc.SetPen(wx.Pen("dark blue", 2))
        dc.DrawLine(w/8,   y,  w-w/8, y)
        dc.DrawLine(w-w/8, y,  w/2,   h/4)
        dc.DrawLine(w-w/8, y,  w/2,   3*h/4)
    def OnLeftDown(self, evt):
        text = self.source.GetValue()
        data = wx.TextDataObject(text)
        dropSource = wx.DropSource(self)#创建释放源
        dropSource.SetData(data)#设置数据
        result = dropSource.DoDragDrop(wx.Drag_AllowMove)#执行释放
        # if the user wants to move the data then we should delete it
        # from the source
        if result == wx.DragMove:
            self.source.SetValue("")#如果需要的话，删除源中的数据
class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="Drop Source")
        p = wx.Panel(self)
        # create the controls
        label1 = wx.StaticText(p, -1, "Put some text in this control:")
        label2 = wx.StaticText(p, -1,
           "Then drag from the neighboring bitmap and\n"
           "drop in an application that accepts dropped\n"
           "text, such as MS Word.")
        text = wx.TextCtrl(p, -1, "sillycat")
        dragctl = DragController(p, text)
        # setup the layout with sizers
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(label1, 0, wx.ALL, 5)
        hrow = wx.BoxSizer(wx.HORIZONTAL)
        hrow.Add(text, 1, wx.RIGHT, 5)
        hrow.Add(dragctl, 0)
        sizer.Add(hrow, 0, wx.EXPAND|wx.ALL, 5)
        sizer.Add(label2, 0, wx.ALL, 5)
        p.SetSizer(sizer)
        sizer.Fit(self)
app = wx.PySimpleApp()
frm = MyFrame()
frm.Show()
app.MainLoop()

文件拖放到目标的代码示例，examples:

import wx
class MyFileDropTarget(wx.FileDropTarget):
    #声明释放到的目标
    def __init__(self, window):
        wx.FileDropTarget.__init__(self)
        self.window = window
    def OnDropFiles(self, x, y, filenames):#释放文件处理函数数据
        self.window.AppendText("\n%d file(s) dropped at (%d,%d):\n" % (len(filenames),x,y))
        for file in filenames:
            self.window.AppendText("\t%s\n" % file)
class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self,None,title="DropTarget",size=(500,300))
        p = wx.Panel(self)
        # create the controls
        label = wx.StaticText(p,-1,"Drop some files here:")
        text = wx.TextCtrl(p,-1,"",style=wx.TE_MULTILINE|wx.HSCROLL)
        # setup the layout with sizers
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(label, 0, wx.ALL, 5)
        sizer.Add(text, 1, wx.EXPAND|wx.ALL, 5)
        p.SetSizer(sizer)
        # make the text control be a drop target
        dt = MyFileDropTarget(text)#将文本控件作为释放到的目标
        text.SetDropTarget(dt)
app = wx.PySimpleApp()
frm = MyFrame()
frm.Show()
app.MainLoop()

定时器应用
简单的数据时钟，examples:

import wx
import time
class ClockWindow(wx.Window):
    def __init__(self, parent):
        wx.Window.__init__(self, parent)
        self.Bind(wx.EVT_PAINT,self.OnPaint)
        self.timer = wx.Timer(self)
        #创建定时器
        self.Bind(wx.EVT_TIMER,self.OnTimer,self.timer)
        #绑定一个定时器事件
        self.timer.Start(1000)#设定时间间隔
    def Draw(self, dc):
        #绘制当前时间
        t = time.localtime(time.time())
        st = time.strftime("%I:%M:%S", t)
        w, h = self.GetClientSize()
        dc.SetBackground(wx.Brush(self.GetBackgroundColour()))
        dc.Clear()
        dc.SetFont(wx.Font(30, wx.SWISS, wx.NORMAL, wx.NORMAL))
        tw, th = dc.GetTextExtent(st)
        dc.DrawText(st, (w-tw)/2, (h)/2 - th/2)
    def OnTimer(self, evt):
        #显示时间事件处理函数
        dc = wx.BufferedDC(wx.ClientDC(self))
        self.Draw(dc)
    def OnPaint(self, evt):
        dc = wx.BufferedPaintDC(self)
        self.Draw(dc)
class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="wx.Timer")
        ClockWindow(self)
       

app = wx.PySimpleApp()
frm = MyFrame()
frm.Show()
app.MainLoop()

多线程应用，examples:

import wx
import threading
import random
class WorkerThread(threading.Thread):
    """
    This just simulates some long-running task that periodically sends
    a message to the GUI thread.
    """
    def __init__(self, threadNum, window):
        threading.Thread.__init__(self)
        self.threadNum = threadNum
        self.window = window
        self.timeToQuit = threading.Event()
        self.timeToQuit.clear()
        self.messageCount = random.randint(10,20)
        self.messageDelay = 0.1 + 2.0 * random.random()
    def stop(self):
        self.timeToQuit.set()
    def run(self):#运行一个线程
        msg = "Thread %d iterating %d times with a delay of %1.4f\n" \
              % (self.threadNum, self.messageCount, self.messageDelay)
        wx.CallAfter(self.window.LogMessage, msg)
        for i in range(1, self.messageCount+1):
            self.timeToQuit.wait(self.messageDelay)
            if self.timeToQuit.isSet():
                break
            msg = "Message %d from thread %d\n" % (i, self.threadNum)
            wx.CallAfter(self.window.LogMessage, msg)
        else:#这里不懂，为啥要用else
            wx.CallAfter(self.window.ThreadFinished, self)
        #当循环“自然”终结（循环条件为假）时 else 从句会被执行一次，
        #而当循环是由 break 语句中断时，else从句就不被执行。
class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="Multi-threaded GUI")
        self.threads = []
        self.count = 0
        panel = wx.Panel(self)
        startBtn = wx.Button(panel, -1, "Start a thread")
        stopBtn  = wx.Button(panel, -1, "Stop all threads")
        self.tc = wx.StaticText(panel, -1, "Worker Threads: 00")
        self.log = wx.TextCtrl(panel,-1,"",style=wx.TE_RICH|wx.TE_MULTILINE)

        inner = wx.BoxSizer(wx.HORIZONTAL)
        inner.Add(startBtn, 0, wx.RIGHT, 15)
        inner.Add(stopBtn, 0, wx.RIGHT, 15)
        inner.Add(self.tc, 0, wx.ALIGN_CENTER_VERTICAL)
        main = wx.BoxSizer(wx.VERTICAL)
        main.Add(inner, 0, wx.ALL, 5)
        main.Add(self.log, 1, wx.EXPAND|wx.ALL, 5)
        panel.SetSizer(main)
        self.Bind(wx.EVT_BUTTON, self.OnStartButton, startBtn)
        self.Bind(wx.EVT_BUTTON, self.OnStopButton, stopBtn)
        self.Bind(wx.EVT_CLOSE,  self.OnCloseWindow)
        self.UpdateCount()
    def OnStartButton(self, evt):
        self.count += 1
        thread = WorkerThread(self.count, self)#创建一个线程
        self.threads.append(thread)
        self.UpdateCount()
        thread.start()#启动线程
    def OnStopButton(self, evt):
        self.StopThreads()
        self.UpdateCount()
    def OnCloseWindow(self, evt):
        self.StopThreads()
        self.Destroy()
    def StopThreads(self):#从池中删除线程
        while self.threads:
            thread = self.threads[0]
            thread.stop()
            self.threads.remove(thread)
    def UpdateCount(self):
        self.tc.SetLabel("Worker Threads: %d" % len(self.threads))
    def LogMessage(self, msg):#注册一个消息
        self.log.AppendText(msg)
    def ThreadFinished(self, thread):#删除线程
        self.threads.remove(thread)
        self.UpdateCount()
app = wx.PySimpleApp()
frm = MyFrame()
frm.Show()
app.MainLoop()