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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):
# SF bug 546078: IDLE calltips cause application error.
# There were crashes on various Windows flavors, and even a
# crashing X server on Linux, with very long calltips.
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)
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() # not in idle
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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