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Viewing changes to Demo/tkinter/ttk/treeview_multicolumn.py

  • Committer: Bazaar Package Importer
  • Author(s): Matthias Klose
  • Date: 2009-03-23 00:01:27 UTC
  • Revision ID: james.westby@ubuntu.com-20090323000127-5fstfxju4ufrhthq
Tags: upstream-3.1~a1+20090322
Import upstream version 3.1~a1+20090322

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Demo/tkinter/ttk/treeview_multicolumn.py
 
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"""Demo based on the demo mclist included with tk source distribution."""
 
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import tkinter
 
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import tkinter.font
 
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from tkinter import ttk
 
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tree_columns = ("country", "capital", "currency")
 
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tree_data = [
 
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    ("Argentina",      "Buenos Aires",     "ARS"),
 
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    ("Australia",      "Canberra",         "AUD"),
 
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    ("Brazil",         "Brazilia",         "BRL"),
 
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    ("Canada",         "Ottawa",           "CAD"),
 
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    ("China",          "Beijing",          "CNY"),
 
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    ("France",         "Paris",            "EUR"),
 
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    ("Germany",        "Berlin",           "EUR"),
 
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    ("India",          "New Delhi",        "INR"),
 
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    ("Italy",          "Rome",             "EUR"),
 
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    ("Japan",          "Tokyo",            "JPY"),
 
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    ("Mexico",         "Mexico City",      "MXN"),
 
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    ("Russia",         "Moscow",           "RUB"),
 
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    ("South Africa",   "Pretoria",         "ZAR"),
 
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    ("United Kingdom", "London",           "GBP"),
 
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    ("United States",  "Washington, D.C.", "USD")
 
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    ]
 
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def sortby(tree, col, descending):
 
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    """Sort tree contents when a column is clicked on."""
 
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    # grab values to sort
 
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    data = [(tree.set(child, col), child) for child in tree.get_children('')]
 
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    # reorder data
 
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    data.sort(reverse=descending)
 
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    for indx, item in enumerate(data):
 
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        tree.move(item[1], '', indx)
 
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    # switch the heading so that it will sort in the opposite direction
 
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    tree.heading(col,
 
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        command=lambda col=col: sortby(tree, col, int(not descending)))
 
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class App(object):
 
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    def __init__(self):
 
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        self.tree = None
 
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        self._setup_widgets()
 
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        self._build_tree()
 
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    def _setup_widgets(self):
 
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        msg = ttk.Label(wraplength="4i", justify="left", anchor="n",
 
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            padding=(10, 2, 10, 6),
 
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            text=("Ttk is the new Tk themed widget set. One of the widgets it "
 
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                  "includes is a tree widget, which can be configured to "
 
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                  "display multiple columns of informational data without "
 
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                  "displaying the tree itself. This is a simple way to build "
 
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                  "a listbox that has multiple columns. Clicking on the "
 
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                  "heading for a column will sort the data by that column. "
 
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                  "You can also change the width of the columns by dragging "
 
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                  "the boundary between them."))
 
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        msg.pack(fill='x')
 
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        container = ttk.Frame()
 
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        container.pack(fill='both', expand=True)
 
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        # XXX Sounds like a good support class would be one for constructing
 
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        #     a treeview with scrollbars.
 
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        self.tree = ttk.Treeview(columns=tree_columns, show="headings")
 
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        vsb = ttk.Scrollbar(orient="vertical", command=self.tree.yview)
 
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        hsb = ttk.Scrollbar(orient="horizontal", command=self.tree.xview)
 
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        self.tree.configure(yscrollcommand=vsb.set, xscrollcommand=hsb.set)
 
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        self.tree.grid(column=0, row=0, sticky='nsew', in_=container)
 
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        vsb.grid(column=1, row=0, sticky='ns', in_=container)
 
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        hsb.grid(column=0, row=1, sticky='ew', in_=container)
 
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        container.grid_columnconfigure(0, weight=1)
 
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        container.grid_rowconfigure(0, weight=1)
 
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    def _build_tree(self):
 
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        for col in tree_columns:
 
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            self.tree.heading(col, text=col.title(),
 
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                command=lambda c=col: sortby(self.tree, c, 0))
 
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            # XXX tkFont.Font().measure expected args are incorrect according
 
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            #     to the Tk docs
 
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            self.tree.column(col, width=tkinter.font.Font().measure(col.title()))
 
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        for item in tree_data:
 
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            self.tree.insert('', 'end', values=item)
 
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            # adjust columns lenghts if necessary
 
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            for indx, val in enumerate(item):
 
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                ilen = tkinter.font.Font().measure(val)
 
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                if self.tree.column(tree_columns[indx], width=None) < ilen:
 
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                    self.tree.column(tree_columns[indx], width=ilen)
 
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def main():
 
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    root = tkinter.Tk()
 
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    root.wm_title("Multi-Column List")
 
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    root.wm_iconname("mclist")
 
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    import plastik_theme
 
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    try:
 
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        plastik_theme.install('~/tile-themes/plastik/plastik')
 
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    except Exception:
 
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        import warnings
 
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        warnings.warn("plastik theme being used without images")
 
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    app = App()
 
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    root.mainloop()
 
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if __name__ == "__main__":
 
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    main()