# general purpose 'tooltip' routines - currently unused in idlefork
# (although the 'calltips' extension is partly based on this code)
# may be useful for some purposes in (or almost in ;) the current project scope
# Ideas gleaned from PySol
from tkinter import *
class ToolTipBase:
def __init__(self, button):
self.button = button
self.tipwindow = None
self.id = None
self.x = self.y = 0
self._id1 = self.button.bind("<Enter>", self.enter)
self._id2 = self.button.bind("<Leave>", self.leave)
self._id3 = self.button.bind("<ButtonPress>", self.leave)
def enter(self, event=None):
self.schedule()
def leave(self, event=None):
self.unschedule()
self.hidetip()
def schedule(self):
self.unschedule()
self.id = self.button.after(1500, self.showtip)
def unschedule(self):
id = self.id
self.id = None
if id:
self.button.after_cancel(id)
def showtip(self):
if self.tipwindow:
return
# The tip window must be completely outside the button;
# otherwise when the mouse enters the tip window we get
# a leave event and it disappears, and then we get an enter
# event and it reappears, and so on forever :-(
x = self.button.winfo_rootx() + 20
y = self.button.winfo_rooty() + self.button.winfo_height() + 1
self.tipwindow = tw = Toplevel(self.button)
tw.wm_overrideredirect(1)
tw.wm_geometry("+%d+%d" % (x, y))
self.showcontents()
def showcontents(self, text="Your text here"):
# Override this in derived class
label = Label(self.tipwindow, text=text, justify=LEFT,
background="#ffffe0", relief=SOLID, borderwidth=1)
label.pack()
def hidetip(self):
tw = self.tipwindow
self.tipwindow = None
if tw:
tw.destroy()
class ToolTip(ToolTipBase):
def __init__(self, button, text):
ToolTipBase.__init__(self, button)
self.text = text
def showcontents(self):
ToolTipBase.showcontents(self, self.text)
class ListboxToolTip(ToolTipBase):
def __init__(self, button, items):
ToolTipBase.__init__(self, button)
self.items = items
def showcontents(self):
listbox = Listbox(self.tipwindow, background="#ffffe0")
listbox.pack()
for item in self.items:
listbox.insert(END, item)
def main():
# Test code
root = Tk()
b = Button(root, text="Hello", command=root.destroy)
b.pack()
root.update()
tip = ListboxToolTip(b, ["Hello", "world"])
root.mainloop()
if __name__ == '__main__':
main()
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