[Gambas-user] [Gambas Bug Tracker] Bug #753: Rich text editor

[Fabien Bodard]

2015-09-22 18:32 GMT+02:00 Benoît Minisini <gambas at ...1...>:
> Le 22/09/2015 18:22, Fabien Bodard a écrit :
>> 2015-09-22 18:08 GMT+02:00 Benoît Minisini <gambas at ...1...>:
>>> Le 22/09/2015 18:03, Benoît Minisini a écrit :
>>>> Le 22/09/2015 17:49, Moviga Technologies a écrit :
>>>>>> yes :-)... and maybe with a better synthax. But for that i think you
>>>>>> will wait or do it yourself.
>>>>>
>>>>> (Since you reply by mail, and not in the bugtracker, I reply you also by
>>>>> mail)
>>>>>
>>>>> I am afraid my competence is not enough to undertake such a task. I have
>>>>> been trying to look at the gb.form.editor code, and it is a bit hard to
>>>>> get a hold on, and there are very few comments explaining what is going
>>>>> on.
>>>>>
>>>>
>>>> It won't help you a lot. TextEditor is really made and optimized for
>>>> displaying and editing text using a monospace font. Automatic
>>>> line-breaking was added recently, and is a sort of hack.
>>>>
>>>> Making a rich-text editor is a bit like programming something like
>>>> LibreOffice Writer, with less features.
>>>>
>>>> You must have paragraphs, using any font, size, colours, style...
>>>> applied to any group of characters in the paragraph.
>>>>
>>>> Then you need a layouting routine that handle where and how to display
>>>> paragraph.
>>>>
>>>> Then you need to display a cursor, the selected text.
>>>>
>>>> You need to be able to transform any mouse position in the editor window
>>>> into a position in the text.
>>>>
>>>> You have to implement an undo/redo system.
>>>>
>>>> Only the rest is similar to what exists in TextEditor: keyboard
>>>> handling, shortcuts, saving and loading. It's the simpler.
>>>>
>>>> Maybe if I have time I will make a library that implement the paragraph
>>>> stuff on top of a vectorial canvas (i.e. a sort of DrawingArea that
>>>> contains vectorial objects).
>>>>
>>>> It's interesting to have a "canvas" layer between the paragraphs and the
>>>> final ScrollArea. Because after you can "easily" add other objects, like
>>>> images, tables, vectorial drawings... until you have a real text processor.
>>>>
>>>> Interesting project if you have at least six months.
>>>>
>> 5 years for me
>>>
>>> And there is (of course) many technical problems like : displaying fonts
>>> correctly in all situations when format changes. LibreOffice is now able
>>> to do that yet.
>>>
>>> For example, Gambas paint methods need more feature to be able to
>>> displaying text using no hinting whatever how the font system is configured.
>>>
>>> And you need handle right-to-left languages too!
>>>
>>> And you need to handle paragraphs having left-to-right and right-to-left
>>> languages mixed!
>>>
>>> ...etc.
>> Well i will concentrate my effort on my term :-) for now.
>>
>> ... and grappe cutting because it's time... 3 weeks of hard work at least.
>
>
> Good luck! With my family we have just picked almost half a ton of
> apples on just three apple trees. It's time too...

Well so now you have just to press it... fermenting apple juce to
obtain cider... distillate it and you will have a fabulous Calva !!
:-P hip!... i love Calva !


>
> --
> Benoît Minisini
>
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-- 
Fabien Bodard