wxruby users - Apr 2009 - Help on StyledTextCtrl''s hotspots

Hi

I want to implement a clickable link in StyledTextCtrl, seems hotspots
is the way to go (when mouse hove on hotspot, cursor changed to
''hand'',
can fire a click event).

My code (below) only works when a lexer is not set!

Is there a way to dynamically set certain text to be hotspots?

 def initialize

   set_lexer(STC_LEX_RUBY) # if set, the hotspot style is lost

   # ...
   set_hotspot_active_underline(true)
   style_set_hot_spot(STYLE_FUNCTION, true)
   evt_stc_hotspot_click(self.id) { |event| puts "clicked hotspot" }
   # ...
 end

 # calling from controller when ready
 def make_function_clickable(start_pos, length)
    @style_mask = 255
    self.start_styling(start_pos, @style_mask)
    self.set_styling(length, STYLE_FUNCTION)
 end

Thanks,
Zhimin
-- 
Posted via http://www.ruby-forum.com/.

Hi Zhimin

Zhimin Zhan wrote:
> I want to implement a clickable link in StyledTextCtrl, seems hotspots
> is the way to go (when mouse hove on hotspot, cursor changed to
''hand'',
> can fire a click event).
>
> My code (below) only works when a lexer is not set!
>
> Is there a way to dynamically set certain text to be hotspots?
To be honest, I''m not sure. I would look for help via Scintilla on this
- as you probably guessed, StyledTextCtrl is a pretty thin layer of this 
editing component.

This page here would suggest that if a lexer is present, it has control 
of setting hotspots:

http://www.mail-archive.com/scintilla-interest at lyra.org/msg00210.html

This may mean it''s not possible, or not possible without writing your 
own lexer. Whether this is possible in Ruby with StyledTextCtrl I don''t
know - I haven''t explored the (large) STC API enough to know. But it 
would be interesting....

alex

Thanks Alex.

The link you pointed out has most related information on this topic, it 
seems too low level for me, probably will be easier to write my own 
lexer.

Zhimin
-- 
Posted via http://www.ruby-forum.com/.

Zhimin Zhan wrote:
> The link you pointed out has most related information on this topic, it 
> seems too low level for me, probably will be easier to write my own 
> lexer.
In that case the following links might be helpful:

http://aspn.activestate.com/ASPN/Mail/Message/wxpython-users/3645151
http://www.scintilla.org/ScintillaDoc.html#SCN_STYLENEEDED

In wxRuby the form of event handling for custom lexing will look 
something like

    evt_stc_styleneeded(self) do | evt |
      start_pos = end_styled
      line_num  = line_from_position( start_pos )
      start_pos = position_from_line( line_num )
      # start styling at position
      start_styling(start_pos, 31)
      # do whatever styling is needed to text chunks
      set_styling(evt.position - start_pos, 2)
    end

good luck!

a