FXRuby: overload FXSlider

[Martin]

Hi all,

I want to create a custom control which changes the background color
of the slider
whenever an update happens. What's the best way to do this? The
control should behave exactly like FXSilder, so I can not use
connect(). And while I am at it: why doesn't connect() support
multiple message handlers?

regards,
Martin

 

[Martinus]

In that case you could subclass FXSlider and override the default

messages handlers for the SEL_MOTION, SEL_LEFTBUTTONPRESS and
SEL_LEFTBUTTONRELEASE messages.

using connect(), or is there another way?

This may be changed in the near future; someone has recently posted some
code to the fxruby-users mailing list which address that very problem.

I have written a simple solution, which works quite well for me. It
took me exactly 10 minutes - yet another example how elegant Ruby is


class MultiConnectSlider < FXSlider
def initialize(*params)
super(*params)
@sigHandler = Hash.new do |h, n|
h[n] = Array.new
end
end

def connect(signal)
@sigHandler[signal].push Proc.new
super(signal) do |sender, selector, data|
@sigHandler[signal].each do |proc|
proc.call(sender, selector, data)
end
end
end
end

 

[Martinus]

No, you'd need to use the FXMAPFUNC() method to intercept those messages

Thanks!

Martin