fxruby users - Jun 2006 - Problems with FXIconList and Icons

Hi list,
I am writing a small program where I want to display some objects in an
IconList. For a better looking a choose an an .png and created a
FXPNGIcon instance of it.
When the program starts it creates an empty FXIconList and the Icons
will initialized too.
While using the program it should be possible to add some objects to the
list.
But if I run the program is crashes with this message:

"FXDCWindow::drawIcon: illegal icon specified."

I do not now what I had made wrong.
Because if I insert some objects to the iconlist during the
initialization (in de initialize method) it works great!


The code looks like:
def initialize()
....
@iconNonterm = loadIcon("tb_buttonbx01.png")
...
@nonterminallist
FXIconList.new(nonterminalgroupbox,nil,0,LAYOUT_FILL_X|LAYOUT_FILL_Y|ICONLIST_MINI_ICONS|ICONLIST_EXTENDEDSELECT|ICONLIST_SINGLESELECT|ICONLIST_ROWS|ICONLIST_DETAILED)
@nonterminallist.connect(SEL_RIGHTBUTTONPRESS,method(:onRightNonterm))
...
end
def onRightNonterm(sender,sel,ptr)
    if !ptr.moved
    menu = FXMenuPane.new(sender)
    FXMenuCommand.new(menu,"Neu",nil,sender).connect(SEL_COMMAND,
method(:onAddNonterm))
    newI = FXIconItem.new("Bla", at iconNonterm, at iconNonterm)
    @nonterminallist.appendItem(newI)
...
end

Thanks a lot
Alexander Jede

On Thursday 22 June 2006 06:03, Alexander Jede wrote:
> Hi list,
> I am writing a small program where I want to display some objects in an
> IconList. For a better looking a choose an an .png and created a
> FXPNGIcon instance of it.
> When the program starts it creates an empty FXIconList and the Icons
> will initialized too.
> While using the program it should be possible to add some objects to the
> list.
> But if I run the program is crashes with this message:
> 
> "FXDCWindow::drawIcon: illegal icon specified."
> 
> I do not now what I had made wrong.
> Because if I insert some objects to the iconlist during the
> initialization (in de initialize method) it works great!
> 
> 
> The code looks like:
> def initialize()
> ....
> @iconNonterm = loadIcon("tb_buttonbx01.png")
> ...
> @nonterminallist >
FXIconList.new(nonterminalgroupbox,nil,0,LAYOUT_FILL_X|LAYOUT_FILL_Y|ICONLIST_MINI_ICONS|ICONLIST_EXTENDEDSELECT|ICONLIST_SINGLESELECT|ICONLIST_ROWS|ICONLIST_DETAILED)
> @nonterminallist.connect(SEL_RIGHTBUTTONPRESS,method(:onRightNonterm))
> ...
> end
> def onRightNonterm(sender,sel,ptr)
>     if !ptr.moved
>     menu = FXMenuPane.new(sender)
>     FXMenuCommand.new(menu,"Neu",nil,sender).connect(SEL_COMMAND,
> method(:onAddNonterm))
>     newI = FXIconItem.new("Bla", at iconNonterm, at iconNonterm)
>     @nonterminallist.appendItem(newI)
> ...
> end
> 
> Thanks a lot
> Alexander Jede
Its in the FAQ: http://www.fox-toolkit.org/faq.html#ILLEGALICON.


		- Jeroen


-- 
+----------------------------------------------------------------------------+
| Copyright (C) 23:30 03/30/2006 Jeroen van der Zijp.   All Rights Reserved. |
+----------------------------------------------------------------------------+

With some help I found the problem at:

http://www.fox-toolkit.org/faq.html#ILLEGALICON

Alexander Jede

Jeroen van der Zijp wrote:
>>"FXDCWindow::drawIcon: illegal icon specified."
> Its in the FAQ: http://www.fox-toolkit.org/faq.html#ILLEGALICON.
Thats a good explanation, thanks for the pointer. I would not have
thought of the subclassing problem.

How about automatic creation? Methods that need "created" widgets
could
check if their parameters are already created, and if they are not, call
create on them.

Fox C++ library might not be the right place to do this. After all,
you''d expect C++ interfaces to have (and enforce) very strict rules. I
believe it would fit more into the FXRuby layer, and would probably be
very easy to achieve with a nice metaprogramming hack.

What do you think?

How do you set the bakcground color of a combobox ?
I have a Combobox, which should have a white background
color, yet it somewhat strangely inherits the gray
color of the frame it sits in.
I have tried to correct this by setting

p = $settingsFrame
p.recursive{|w|
			# w.baseColor=STD_BACK_COLOR
			next if w.kind_of? TextField
			next if w.backColor==HEADER_COLOR
                        if /ComboBox/.match(w.type.to_s)
                    	 w.baseColor=WHITE_BACK_COLOR
                         w.backColor=WHITE_BACK_COLOR
                        
                        else
                          w.backColor=STD_BACK_COLOR
                        end
          	}


for WHITE_BACK_COLOR=FXRGB(255,255,255),
and STD_BACK_COLR=FXRGB(128,128,128)

but this changes the background color from gray to white only if I click on
the combobox to show a dropdown of them. Then , everything becomes
white, but after that, it turns to gray again.

Thank you for your help,

Axel 


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