[Tkinter-discuss] tag insertion while writing

[Alessandro Magni]

Hi list, hi Michael, > Hi everybody, > I'm looking for some directions, while programming a very simple > editor (supporting basic formatting) > > The window where the user writes is a Text widget (named: text), where > I put a tag 'b' to set the text where this tag applies to bold. > > This is not a problem when I apply the bold to a selection: > > text.tag_add('b', SEL_FIRST,SEL_LAST) > > I have instead two problems when I just want to switch on/off the bold > while typing. To switch it on the only way I found is this: > > text.insert(INSERT, ' ', 'b' ) > text.mark_set("insert", INSERT+'-1c') > > notice that I have to insert TWO spaces. If I insert one, the bold > doesnt apply. If I insert '', my cursor goes back one char! > > My second problem is how to switch it off, when I'm writing within a > bolded region - and for this I havent the slightest idea... After different attempts at it, I realized that the following works perfectly for deselecting the currently active bold tag. It still suffers from the problem that when I 'switch on' the tag it adds a space - but I can live with it...     l=text.tag_names('insert')         if l==() or l[0]!='b':   # select bold           text.insert(INSERT, '  ', 'b' )           text.mark_set('insert', 'insert-1c')         else:                    # deselect bold           text.insert(INSERT, ' ' )           text.tag_remove ('b','insert-1c')           text.mark_set('insert', 'insert-1c') thanks! alessandro -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ / Dr.Alessandro Magni \ Electromagnetics Division / INRiM Strada delle Cacce 91, 10135 Torino (ITALIA) \ Email ma...@inrim.it / Tel: 0039-011-3919821 Fax: 0039-011-3919834 \ URL http://www.inrim.it/~magni / Our business in life is not to succeed but to continue to fail \ in high spirits. -- Robert Louis Stevenson ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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