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e72f05d5fb
Rev 1.4 SF bug 546078: IDLE calltips cause application error. Assorted crashes on Windows and Linux when trying to display a very long calltip, most likely a Tk bug. Wormed around by clamping the calltip display to a maximum of 79 characters (why 79? why not ...). Bugfix candidate, for all Python releases. Rev 1.5 Remove unnecessary imports
76 lines
2.1 KiB
Python
76 lines
2.1 KiB
Python
# A CallTip window class for Tkinter/IDLE.
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# After ToolTip.py, which uses ideas gleaned from PySol
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# Used by the CallTips IDLE extension.
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from Tkinter import *
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class CallTip:
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def __init__(self, widget):
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self.widget = widget
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self.tipwindow = None
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self.id = None
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self.x = self.y = 0
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def showtip(self, text):
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# SF bug 546078: IDLE calltips cause application error.
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# There were crashes on various Windows flavors, and even a
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# crashing X server on Linux, with very long calltips.
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if len(text) >= 79:
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text = text[:75] + ' ...'
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self.text = text
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if self.tipwindow or not self.text:
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return
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self.widget.see("insert")
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x, y, cx, cy = self.widget.bbox("insert")
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x = x + self.widget.winfo_rootx() + 2
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y = y + cy + self.widget.winfo_rooty()
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self.tipwindow = tw = Toplevel(self.widget)
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tw.wm_overrideredirect(1)
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tw.wm_geometry("+%d+%d" % (x, y))
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label = Label(tw, text=self.text, justify=LEFT,
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background="#ffffe0", relief=SOLID, borderwidth=1,
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font = self.widget['font'])
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label.pack()
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def hidetip(self):
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tw = self.tipwindow
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self.tipwindow = None
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if tw:
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tw.destroy()
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###############################
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#
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# Test Code
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#
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class container: # Conceptually an editor_window
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def __init__(self):
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root = Tk()
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text = self.text = Text(root)
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text.pack(side=LEFT, fill=BOTH, expand=1)
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text.insert("insert", "string.split")
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root.update()
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self.calltip = CallTip(text)
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text.event_add("<<calltip-show>>", "(")
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text.event_add("<<calltip-hide>>", ")")
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text.bind("<<calltip-show>>", self.calltip_show)
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text.bind("<<calltip-hide>>", self.calltip_hide)
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text.focus_set()
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# root.mainloop() # not in idle
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def calltip_show(self, event):
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self.calltip.showtip("Hello world")
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def calltip_hide(self, event):
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self.calltip.hidetip()
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def main():
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# Test code
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c=container()
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if __name__=='__main__':
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main()
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