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How to bind a key event for widget?
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jyf1987
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How to bind a key event for widget?
i want to bind a key event function for a input widget
to check if user has press the enter key
so how to do that??
Cheers
jyf
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| 09-13-2008 11:45 PM |
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MrBill
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RE: How to bind a key event for widget?
do widget= fltk:Fl_Input(0,0,0,0,"")
widget:callback(input_cb)
widget:when(8) -- this is the constant for the Enter key
Don't use that code exactly as its missing dimensions and labels
But the widget:when(8) is what you are looking for.
There is a list of constants for events and I always forget where they are, either somewhere in the forums, in murgaLua examples, or maybe in Mikshaws widget example.
I use Fluid and then convert to lua so thats how I get it done, usually.
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| 09-14-2008 07:03 AM |
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JohnMurga
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RE: How to bind a key event for widget?
I use Fluid and then convert to lua so thats how I get it done, usually.
You just beat me to it :-)
The verbose version would be :
widget:when(fltk.FL_WHEN_ENTER_KEY_ALWAYS)
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| 09-14-2008 07:22 AM |
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jyf1987
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RE: How to bind a key event for widget?
thank you very much
when i dont get the answer i use set_event_handler to solver the problem
the code is
function quit_callback(msg)
if fltk.fl_choice("Are you sure you want to EXIT ?", "No", "Yes", nil) >= 1 then
w:hide()
os.exit()
end
end
function all_event(event)
if(Fl:event_key(FL_Enter) and murgaLua.getFltkEventText(event)=="FL_SHORTCUT") then
msgout:add(msgin:value())
msgout:bottomline(msgout:size())
msgin:value("")
end
end
ww,wh,wt=300,280,"Simple IRC Client - Powered by jyf1987"
w= fltk:Fl_Window(ww,wh,wt)
w:callback(quit_callback)
msgout= fltk:Fl_Browser(5, 5, 290, 240)
msgin= fltk:Fl_Input(5, 250, 290, 25)
w:show()
Fl.set_event_handler(all_event)
Fl:start_event_handler()
Fl:run()
also it's easy to use widget:when(fltk.FL_WHEN_ENTER_KEY_ALWAYS)
here is the new code
function quit_callback(msg)
if fltk.fl_choice("Are you sure you want to EXIT ?", "No", "Yes", nil) >= 1 then
w:hide()
os.exit()
end
end
ww,wh,wt=300,280,"Simple IRC Client - Powered by jyf1987"
w= fltk:Fl_Window(ww,wh,wt)
w:callback(quit_callback)
msgout= fltk:Fl_Browser(5, 5, 290, 240)
msgin= fltk:Fl_Input(5, 250, 290, 25)
msgin:callback(
function()
msgout:add(msgin:value())
msgout:bottomline(msgout:size())
msgin:value("")
end
)
msgin:when(fltk.FL_WHEN_ENTER_KEY_ALWAYS)
w:show()
Fl:run()
Cheers
jyf
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| 09-14-2008 12:55 PM |
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JohnMurga
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RE: How to bind a key event for widget?
thank you very much
when i dont get the answer i use set_event_handler to solver the problem
Great examples, thanks :-)
The only problem with using the event handler is that input fields will absorb the enter key (as a tab to next field) unless you mess around with when (say a when(0)).
Another tip is to use event_inside(widget), as this allows you (when using the event_handler) to know what widget you where in when the event occured.
Cheers
JohnM
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| 09-15-2008 12:13 AM |
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jyf1987
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RE: How to bind a key event for widget?
thx for the tip
so anyother secret? 
Cheers
jyf
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| 09-15-2008 10:37 PM |
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jyf1987
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RE: How to bind a key event for widget?
i'am looking forward fltk2 to be support
for displaying chinese chars,any way,even that wont be support the murgalua is still a powerful tool for me,good works
Cheers
jyf
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| 09-15-2008 10:42 PM |
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JohnMurga
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RE: How to bind a key event for widget?
thx for the tip
so anyother secret?
Lots ... That's why I have to write some updated docs :-)
Cheers
JohnM
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| 09-15-2008 11:37 PM |
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mikshaw
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RE: How to bind a key event for widget?
Although I'm not sure how well this would work for your needs, if at all, you could try using decimal codes to display the Chinese characters. It isn't ideal, of course, since it will not translate to other machines that don't have the exact font, and without some special magic it is probably useful only for static strings.
Here is a script that will display 256 characters available in the FL_SCREEN font. You'll need to add a set_font line to get your desired font:
Fl:set_font(fltk.FL_SCREEN,"my_font_name")
Optionally change bro:textfont() to a different constant.
EDIT: Then again, maybe just changing the font would provide the same level of usefulness/uselessness
odd=nil
ww=500; wh=350
win=fltk:Fl_Window(ww,wh,"decimal codes")
bro=fltk:Fl_Browser(10,10,ww/2-20,wh-20)
bro:textfont(fltk.FL_SCREEN)
for i=0,255 do
if i<10 then t=" " elseif i<100 then t=" " else t="" end
if odd then odd=nil; col="@B52@." else odd=1; col="" end
bro:add(col..t..i.."\t"..string.format('%c',i))
end
box=fltk:Fl_Multiline_Output(ww/2,10,ww/2-10,wh-20)
box:textsize(12)
box:set_output()
box:value([[
When including an escaped string of
1, 2, or 3 decimals as part of a Lua
string, those decimals will be read
as the character matching that code.
For example, \64 shows '@' and \10 is
a newline character on systems that
use ASCII:97
In this particular demo, the lines in
the browser were added programatically
rather than being provided as a full
string. Concatenating an escape character
to the string it is intended to escape
is seemingly impossible, but you can get
the same result with string.format:
string.format('%c',number)
Results may vary depending on your
system's configuration or chosen font.
]])
win:show()
Fl:run()
This post was last modified: 09-15-2008 11:44 PM by mikshaw.
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| 09-15-2008 11:39 PM |
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jyf1987
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RE: How to bind a key event for widget?
it is cool ,but chinese char use 2 bytes so 256 will not enough
Cheers
jyf
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| 09-16-2008 12:21 AM |
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