On September 2, 2005 03:49 am, Gergely Kontra wrote: > Hi! > > I'm trying to implement an editable cell in a treeview. > It's a CellRendererText, but in the model it is actually not a > string, but has string representation. When the user edits the > cell, I must check it. > If the check fails, it shouldn't allow me to leave the field, > but tell me what's wrong. Can I suggest that you consider other possibilities to achieve the same aim? I've just been going through the whole area of field validation myself so I can appreciate how much you have thought about this yourself and how difficult it can be. My current preferred method is to check the value as the focus leaves the field and leave behind a visual clue as to its validity (e.g. change the text colour and display the problem in an adjacent label or support some sort of error popup on hovering over the cell). As far as I am concerned the worst thing you can do is simply to refuse to allow the focus to move out; if you do that then make sure you only do it when the focus is moving into something else within your application. > > So, I begin to edit the cell, type in a lot of cool stuff. > Then, I try to leave the cell, but the cell's content is not > valid. Falling back to the last good value is not a solution > for me, I want to get a message about the invalid entry and > keep editing the field. How can I achieve this? > Assuming that you have decided that you need to do this you will need to add code so that you can track where the focus is currently, trap attempts to change the focus from that field to another widget in your application and do it then. That is going to be further complicated if you want to pop up an error dialog because, of course, you must let the focus move to the error dialog but not to another field. Please note that I am new to doing this sort of stuff but I expect you can do something with gtk_widget_grab_focus. > In fact, it is a Regexp, and I'm coding in ruby, but that's > not the point. -- > +-[ Gergely Kontra <kgergely@xxxxxx> > http://www.mcl.hu/~kgergely ]------+ > > | PhD Student (Room:IB113) PGP ID: 0x7E3846BF Mobile:(+36 > | 20)356 9656 | Budapest University of Technology and > | Economics ICQ# 175564914 | > > +------------- "Olyan langesz vagyok, hogy poroltoval kellene > jarnom!" -+ _______________________________________________ > > gtk-list@xxxxxxxxx > http://mail.gnome.org/mailman/listinfo/gtk-list -- Bill Medland mailto:billmedland@xxxxxxxxxxxxxxxx http://webhome.idirect.com/~kbmed _______________________________________________ gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
