listbox method select()

[incisor]

I would like to set a listbox to show a specific value that may change at run time .Can I preset the list box to display any of the avaiable list choices with the select() method. The help file definition seems like it should do this.'
#handle SELECT(n) - Set the current selection to be the nth item.
or would this just be setting the value in memory.

[StefanPendl]

SELECT(N) will select the item at index N and highlight it, so the user knows, that this is the current selection.

[incisor]

Could you show a simple example, the proper syntax is escaping me.

[incisor]

Tried the example but...


************************
dim colorChoices$(2)
colorChoices$(0) = "red"
colorChoices$(1) = "green"
colorChoices$(2) = "blue"

print "Choose a color and click Accept."

listbox #colors, colorChoices$(), 3
#colors select(1)

print
link #acceptColor, "Accept", [accept]
print
wait

[accept]

'#colors select(1)

print "You chose "; #colors selection$()
print "You chose "; #colors selection()


wait

****************
... not what I was expecting for results and the there is no highlight on any of the list box values as expected.

results
You chose 1
You chose 1

I am confuzzeled.

[incisor]

Also the above was done without making a selectoin from the list.. just clicked accept.

[StefanPendl]

It seems, that there is the second syntax for the select command missing from the help file.

The below code gives the expected result for a list box that uses a string array.


dim colorChoices$(2)
colorChoices$(0) = "red"
colorChoices$(1) = "green"
colorChoices$(2) = "blue"

print "Choose a color and click Accept."

listbox #colors, colorChoices$(), 3
#colors select("green")

print
print "I chose "; #colors selection$()
print "I chose "; #colors selection()
print
link #acceptColor, "Accept", [accept]
print
wait

[accept]
print
print "You chose "; #colors selection$()
print "You chose "; #colors selection()
end


[Psycho]

I'm a little late on this but changing this one line on your original code should get the expected result:

#colors select(colorChoices$(1))

where you choose the desired array index number. Prior to that, your code did not clearly show what index 1 was for.
Below is your original code with updated line:

 dim colorChoices$(2)
colorChoices$(0) = "red"
colorChoices$(1) = "green"
colorChoices$(2) = "blue"

print "Choose a color and click Accept."

listbox #colors, colorChoices$(), 3
#colors select(colorChoices$(1))

print
link #acceptColor, "Accept", [accept]
print
wait

[accept]

'#colors select(1)

print "You chose "; #colors selection$()
print "You chose "; #colors selection()


wait

John "Psycho" Siejkowski

[colinmac]

Hello All,
I have tried various combinations of the code above, and the code form the help file example, and I cannot get #listbox selection() method to return anything sensible. It will normally return 0, else it returns the last value set with #listbox select(). It is not responsive to user interaction.

Is this method broken? I am using 1.0.1 build 2.44

Colin

[StefanPendl]

SELECTION() is only meant to be used with list boxes containing numerical data.
For list boxes with string data you need to use SELECTION$().

[colinmac]

Ok Stefan,

I will revert to my old method of building the listbox array with an index at the start of each element and reading with val(#listbox selection()). Pity though!

Colin

[StefanPendl]

You don't need VAL(), since SELECTION() already returns a number.