python - 如何在 gtk.ScrolledWindow 内的 GtkTreeView 中显示列标题？

Question

我在 Gtk.Treeview 和 Gtk.ScrolledWindow 中遇到问题。我有大量数据，这些数据不适合我的正常窗口几何图形，所以我将我的 Treeview 放在 ScrolledWindow 中，这似乎是正常的方式。这个解决方案的问题是，当我滚动时，我的列标题消失了。这种行为对我来说似乎还可以，因为 ScrolledWindow 应该关心其中的小部件。

那么，如何使我的 Treeview 可滚动并始终在第一行显示列标题？

我修改了 basictreeview.py 示例来表示我的问题:

#!/usr/bin/env python

# example basictreeview.py

import pygtk
pygtk.require('2.0')
import gtk

class BasicTreeViewExample:

    # close the window and quit
    def delete_event(self, widget, event, data=None):
        gtk.main_quit()
        return False

    def __init__(self):
        # Create a new window
        self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
        self.window.set_title("Basic TreeView Example")
        self.window.set_size_request(200, 200)
        self.window.connect("delete_event", self.delete_event)

        # create a TreeStore with one string column to use as the model
        self.liststore = gtk.ListStore(str)

        # we'll add some data now - 4 rows with 3 child rows each
        for i in range(10):
            self.liststore.append([str(i)])

        # create the TreeView using treestore
        self.treeview = gtk.TreeView(self.liststore)

        # create the TreeViewColumn to display the data
        self.tvcolumn = gtk.TreeViewColumn("Column-Name", gtk.CellRendererText(), text=0)

        # add tvcolumn to treeview
        self.treeview.append_column(self.tvcolumn)

        # make it searchable
        self.treeview.set_search_column(0)

        # Allow sorting on the column
        self.tvcolumn.set_sort_column_id(0)

        # Allow drag and drop reordering of rows
        self.treeview.set_reorderable(True)

        # Add Treeview to a ScrolledWindow
        self.scrolledwindow = gtk.ScrolledWindow(hadjustment=None, vadjustment=None)
        self.scrolledwindow.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
        self.scrolledwindow.add_with_viewport(self.treeview)

        self.window.add(self.scrolledwindow)

        self.window.show_all()

def main():
    gtk.main()

if __name__ == "__main__":
    tvexample = BasicTreeViewExample()
    main()

Answer 1

将 self.scrolledwindow.add_with_viewport 更改为 self.scrolledwindow.add 即可。来自 the documentation :

The add_with_viewport() method is used to add a widget (specified by child) without native scrolling capabilities to the scrolled window. This is a convenience function that is equivalent to adding child to a gtk.Viewport, then adding the viewport to the scrolled window. If a child has native scrolling (e.g. gtk.TextView, gtk.TreeView, gtk.Layout), use gtk.Container.add() instead of this method.

gtk.TreeView 的“ native 滚动”将列标题保持在顶部，但是如果您首先将整个 TreeView 小部件放在 gtk.Viewport 中，那么整个小部件将滚动。