Tkinter的ToolTip控件，tkintertooltip,Tkinter的Tool

Tkinter的ToolTip控件，tkintertooltip,Tkinter的Tool

Tkinter的ToolTip控件实现代码：

from Tkinter import *from time import time, localtime, strftimeclass ToolTip( Toplevel ):    """    Provides a ToolTip widget for Tkinter.    To apply a ToolTip to any Tkinter widget, simply pass the widget to the    ToolTip constructor    """     def __init__( self, wdgt, msg=None, msgFunc=None, delay=1, follow=True ):        """        Initialize the ToolTip        Arguments:          wdgt: The widget this ToolTip is assigned to          msg:  A static string message assigned to the ToolTip          msgFunc: A function that retrieves a string to use as the ToolTip text          delay:   The delay in seconds before the ToolTip appears(may be float)          follow:  If True, the ToolTip follows motion, otherwise hides        """        self.wdgt = wdgt        self.parent = self.wdgt.master                                          # The parent of the ToolTip is the parent of the ToolTips widget        Toplevel.__init__( self, self.parent, bg='black', padx=1, pady=1 )      # Initalise the Toplevel        self.withdraw()                                                         # Hide initially        self.overrideredirect( True )                                           # The ToolTip Toplevel should have no frame or title bar        self.msgVar = StringVar()                                               # The msgVar will contain the text displayed by the ToolTip                if msg == None:                                                                     self.msgVar.set( 'No message provided' )        else:            self.msgVar.set( msg )        self.msgFunc = msgFunc        self.delay = delay        self.follow = follow        self.visible = 0        self.lastMotion = 0        Message( self, textvariable=self.msgVar, bg='#FFFFDD',                 aspect=1000 ).grid()                                           # The test of the ToolTip is displayed in a Message widget        self.wdgt.bind( '<Enter>', self.spawn, '+' )                            # Add bindings to the widget.  This will NOT override bindings that the widget already has        self.wdgt.bind( '<Leave>', self.hide, '+' )        self.wdgt.bind( '<Motion>', self.move, '+' )    def spawn( self, event=None ):        """        Spawn the ToolTip.  This simply makes the ToolTip eligible for display.        Usually this is caused by entering the widget        Arguments:          event: The event that called this funciton        """        self.visible = 1        self.after( int( self.delay * 1000 ), self.show )                       # The after function takes a time argument in miliseconds    def show( self ):        """        Displays the ToolTip if the time delay has been long enough        """        if self.visible == 1 and time() - self.lastMotion > self.delay:            self.visible = 2        if self.visible == 2:            self.deiconify()    def move( self, event ):        """        Processes motion within the widget.        Arguments:          event: The event that called this function        """        self.lastMotion = time()        if self.follow == False:                                                # If the follow flag is not set, motion within the widget will make the ToolTip dissapear            self.withdraw()            self.visible = 1        self.geometry( '+%i+%i' % ( event.x_root+10, event.y_root+10 ) )        # Offset the ToolTip 10x10 pixes southwest of the pointer        try:            self.msgVar.set( self.msgFunc() )                                   # Try to call the message function.  Will not change the message if the message function is None or the message function fails        except:            pass        self.after( int( self.delay * 1000 ), self.show )    def hide( self, event=None ):        """        Hides the ToolTip.  Usually this is caused by leaving the widget        Arguments:          event: The event that called this function        """        self.visible = 0        self.withdraw()def xrange2d( n,m ):    """    Returns a generator of values in a 2d range    Arguments:      n: The number of rows in the 2d range      m: The number of columns in the 2d range    Returns:      A generator of values in a 2d range    """    return ( (i,j) for i in xrange(n) for j in xrange(m) )def range2d( n,m ):    """    Returns a list of values in a 2d range    Arguments:      n: The number of rows in the 2d range      m: The number of columns in the 2d range    Returns:      A list of values in a 2d range    """    return [(i,j) for i in range(n) for j in range(m) ]def print_time():    """    Prints the current time in the following format:    HH:MM:SS.00    """    t = time()    timeString = 'time='    timeString += strftime( '%H:%M:', localtime(t) )    timeString += '%.2f' % ( t%60, )    return timeStringdef main():    root = Tk()    btnList = []    for (i,j) in range2d( 6, 4 ):        text = 'delay=%i\n' % i        delay = i        if j >= 2:            follow=True            text += '+follow\n'        else:            follow = False            text += '-follow\n'        if j % 2 == 0:            msg = None            msgFunc = print_time            text += 'Message Function'        else:            msg = 'Button at %s' % str( (i,j) )            msgFunc = None            text += 'Static Message'        btnList.append( Button( root, text=text ) )        ToolTip( btnList[-1], msg=msg, msgFunc=msgFunc, follow=follow, delay=delay)        btnList[-1].grid( row=i, column=j, sticky=N+S+E+W )    root.mainloop()if __name__ == '__main__':    main()

注意：上面的ToolTip在有框架的窗体中不能正常工作。