"Ian Ward" <[email protected]> ha scritto nel messaggio news:[email protected]... > Hello! > > ft2010 wrote on 2011-04-09 12:53: >> Hi, I'm new to Urwid (and Python too). I started a python-urwid program >> to >> essentially display items in two listBox objects as the body in an >> urwid.Frame (the layout is similar to most of IDEs). To have more control >> in >> listboxes I created a control to display a multicolumn listbox with an >> optional column's header (and in the future with optional horizontal and >> vertical scrollbars). >> >> The new listbox is a urwid.Filler that wrap a simple urwid.ListBox with >> urwid.SimpleListWalker with items implemented as urwid.Text widgets, so >> the >> listbox is really a simple urwid listbox. If the option 'header_visible' >> is >> true the widget will be a urwid.Filler that wrap a urwid.Pile with an >> urwid.Text for listbox header in the first row and the previos widgets on >> the second row. >> >> Now, to calculate column widths (configurable) I need to know the width >> of >> the whole implemented widget (Filler) or at least the width of the >> contained >> ListBox. This will help in calculating the horizontal scrollbar (if I >> will >> implement it). For the vertical scrollbar I will need the height of the >> Filler. > > Have you read the "widgets in Urwid typically have no size" part of the > manual? > > http://excess.org/urwid/wiki/WidgetMethods#WidgetMethods >
ehm, I readed it but forget it when I started coding... > You know the size of a widget only when it's being rendered or handling > a keyboard or mouse event. Does that not work in your case? > > I've had a plan for an Urwid-way to implement scrollbars for a number of > years, but I haven't wanted scroll bars enough to actually implement > them yet. You could have a look at what I was planning here: > > http://excess.org/urwid/wiki/MoreWidgets > > Ian Probably my approach to this library is wrong, I have to understand the internals to know if I can use it like other libraries (TVision in C++, to mention one or a low level ncurses wrap). Urwid is good if used for web browser like display, it has a very good unicode support and color management. Perhaps there is a way to use it to develop an UI to manage widgets (controls), like in a GUI, by re-implementing all high level widgets as box widgets (they should have a method to ask their size), I will try this path, if it works I will tell you my progress. Thanks for your answer _______________________________________________ Urwid mailing list [email protected] http://lists.excess.org/mailman/listinfo/urwid
