80 lines
2.1 KiB
Python
80 lines
2.1 KiB
Python
"""Pop-up menus."""
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try:
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import Tkinter as tk
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except ImportError:
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# python 3
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try:
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import tkinter as tk
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except ImportError:
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pass
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import logging
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class PopupMenu:
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"""The popup-menu."""
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def __init__(self):
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"""Initialize."""
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# menu widget
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self.root = tk.Tk()
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self.root.withdraw()
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self.menu = tk.Menu(self.root)
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# internal state
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self._item_count = 0
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self._clicked_item = None
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self._active = False
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# bind event of popup getting closed by clicking outside of its area
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self.menu.bind('<Unmap>',
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lambda event: self.root.after_idle(
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self._dismiss_callback))
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def add_menuitem(self, menuitem, callback=None):
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"""Add menu items."""
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item_count = self._item_count
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def click_callback():
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# call internal callback with item index
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self._item_callback(item_count)
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# default to internal callback
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if callback is None:
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callback = click_callback
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self.menu.add_command(label=menuitem,
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command=callback)
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# track item index
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self._item_count += 1
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def _item_callback(self, which_item):
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"""Menu item click callback."""
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logging.debug('popup: item callback: {}'.format(which_item))
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self._clicked_item = which_item
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self.root.destroy()
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self._active = False
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def _dismiss_callback(self):
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"""Menu dismissed."""
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logging.debug('popup: menu dismissed')
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if self._active is True:
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self._clicked_item = None
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self.root.destroy()
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def show(self, event):
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"""Show popup."""
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self._clicked_item = None
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self.menu.tk_popup(event['x'], event['y']-50)
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self._active = True
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self.root.mainloop()
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return self._clicked_item
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def create_and_show_menu(event, *menuitems):
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"""Create a menu object and show."""
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menu_obj = PopupMenu()
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for menuitem in menuitems:
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menu_obj.add_menuitem(*menuitem)
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return menu_obj.show(event)
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