GetRValue RGBToColor  do not work!
lazarus / 9-Editor

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DanNineOne · 2009-01-01 22:55

Got these errors:

Error: Identifier not found "GetRValue"
Error: Identifier not found "RGBToColor"

                            (also happens wth g and b values)

if I type "Graphics.<(dot)" then I see them in the list, I can type
out the function name and watch the list narrow down until its just
one function (Get[R/G/B]Value) and one letter missing when I type the
last letter (e) it disapears from the list. ?????

how do I get the (ignorant ) compiler to recognise that these are
valid functions?

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Phil · 2009-01-01 22:58

Did you include Graphics in the uses list?

Thanks.

-Phil

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DanNineOne · 2009-01-02 11:14

Graphics is in my uses list of the unit that is calling the function.

Should I have it anywhere else?

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Paul Ishenin · 2009-01-02 12:47

yes, LCLIntf I suppose.

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DanNineOne · 2009-01-02 13:35

I am sort of new to lazarus, (switched to it from delphi 2006) it
reminded me of delphi 5 but its still completely different.

So as I am new I have'nt much of an idea of what LCLIntf is, I have
gathered that it is something to do with "Lazarus Component Library"
but thats it.

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Paul Ishenin · 2009-01-02 13:56

LCLIntf is a windows compatibility unit. It contains some popular
functions which windows unit has.

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DanNineOne · 2009-01-02 16:32

If you are suggesting that I should add graphics to the uses list in
LCLintf...

Quote from: DanNineOne on January 02, 2009, 12:14:47 pmGraphics is in
my uses list of the unit that is calling the function.

Should I have it anywhere else?

Quote from: Paul Ishenin on January 02, 2009, 01:47:18 pmyes, LCLIntf
I suppose.

It just makes a circular reference.

Is the Get[R/G/B]Value problem a bug in the fpc compiler?
Or is it a bug in the lazarus IDE?

 It must be some kind of bug!    I would guess that it is a compiler
bug?

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Phil · 2009-01-02 16:53

GetRValue is a Win API function. To use this function cross-platform,
include the LclIntf unit as Paul suggested. Don't use the Windows unit
or your app won't be compilable on OS X or Linux.

RGBToColor is a function in the Graphics unit. It doesn't have a
Delphi equivalent  I don't think.

If this doesn't help, please post the code that you're having trouble
compiling.

Thanks.

-Phil

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DanNineOne · 2009-01-02 19:06

It works now, thanks! i got a bit confused as to what to put in wich
uses list.
Great help, thanks again!