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 formatted text"
"loaded from a string .")

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()