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"""A CallTip window class for Tkinter/IDLE.
After ToolTip.py, which uses ideas gleaned from PySol
Used by the CallTips IDLE extension.
"""
from Tkinter import *
class CallTip:
def __init__(self, widget):
self.widget = widget
self.tipwindow = None
self.id = None
self.x = self.y = 0
def showtip(self, text):
" Display text in calltip window"
# truncate overly long calltip
if len(text) >= 79:
text = text[:75] + ' ...'
self.text = text
if self.tipwindow or not self.text:
return
self.widget.see("insert")
x, y, cx, cy = self.widget.bbox("insert")
x = x + self.widget.winfo_rootx() + 2
y = y + cy + self.widget.winfo_rooty()
self.tipwindow = tw = Toplevel(self.widget)
# XXX 12 Dec 2002 KBK The following command has two effects: It removes
# the calltip window border (good) but also causes (at least on
# Linux) the calltip to show as a top level window, burning through
# any other window dragged over it. Also, shows on all viewports!
tw.wm_overrideredirect(1)
tw.wm_geometry("+%d+%d" % (x, y))
try:
# This command is only needed and available on Tk >= 8.4.0 for OSX
# Without it, call tips intrude on the typing process by grabbing
# the focus.
tw.tk.call("::tk::unsupported::MacWindowStyle", "style", tw._w,
"help", "noActivates")
except TclError:
pass
label = Label(tw, text=self.text, justify=LEFT,
background="#ffffe0", relief=SOLID, borderwidth=1,
font = self.widget['font'])
label.pack()
def hidetip(self):
tw = self.tipwindow
self.tipwindow = None
if tw:
tw.destroy()
###############################
#
# Test Code
#
class container: # Conceptually an editor_window
def __init__(self):
root = Tk()
text = self.text = Text(root)
text.pack(side=LEFT, fill=BOTH, expand=1)
text.insert("insert", "string.split")
root.update()
self.calltip = CallTip(text)
text.event_add("<<calltip-show>>", "(")
text.event_add("<<calltip-hide>>", ")")
text.bind("<<calltip-show>>", self.calltip_show)
text.bind("<<calltip-hide>>", self.calltip_hide)
text.focus_set()
root.mainloop()
def calltip_show(self, event):
self.calltip.showtip("Hello world")
def calltip_hide(self, event):
self.calltip.hidetip()
def main():
# Test code
c=container()
if __name__=='__main__':
main()
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