This is an extension for the Button class of Tkinter. This class creates a tip-window when the mouse is entering a button widget.
Python, 66 lines
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from Tkinter import *
tipDelay = 1000
class TipButton(Button):
def __init__(self,parent=None,tip='',**kw):
Button.__init__(self,parent,kw)
self.bind('<Enter>',self._delayedshow)
self.bind('<Button-1>',self._leave)
self.bind('<Leave>',self._leave)
self.frame = Toplevel(self,bd=1,bg="black")
self.frame.withdraw()
self.frame.overrideredirect(1)
self.frame.transient()
l=Label(self.frame,text=tip,bg="yellow",justify='left')
l.update_idletasks()
l.pack()
l.update_idletasks()
self.tipwidth = l.winfo_width()
self.tipheight = l.winfo_height()
def _delayedshow(self,event):
self.focus_set()
self.request=self.after(tipDelay,self._show)
def _show(self):
self.update_idletasks()
FixX = self.winfo_rootx()+self.winfo_width()
FixY = self.winfo_rooty()+self.winfo_height()
if FixX + self.tipwidth > self.winfo_screenwidth():
FixX = FixX-self.winfo_width()-self.tipwidth
if FixY + self.tipheight > self.winfo_screenheight():
FixY = FixY-self.winfo_height()-self.tipheight
self.frame.geometry('+%d+%d'%(FixX,FixY))
self.frame.deiconify()
# print self.frame.geometry()
# print self.winfo_screenwidth()
def _leave(self,event):
self.frame.withdraw()
self.after_cancel(self.request)
#--- testing ---
if __name__ == '__main__':
def log(a):
print a
main = Tk()
b1 = TipButton(main,"tip1",text="Example1",\
command=(lambda e="tip1": log(e)))
b2 = TipButton(main,"tip2",text="Example2",\
command=(lambda e="tip2": log(e)))
b1.pack()
b2.pack()
main.mainloop()
### end module ###
|
For the behaviour of this widget is considered that the tip will be visible again when the widget will be moved to the bottom/right border of the screen.
A more generic design would be to incorporate the following features: - the tip delay as part of the constructor - the foreground/background color of the tip-window as part of the constructor - disabeling the tip when an empty tip-string is given to the constructor
This should be simple to deal.
Tags: ui
