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Thread: Changing Button Background and Text Colours

  1. Aug 17th, 2000, 08:14 AM #1
    Judd
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    A hardish one for you GDI people.

    I'm trying to change the text colour and background colour of a Button using API (I have reasons).

    I managed to change the text colour using BS_OWNERDRAW and SetTextColour. I also changed the colour of the box using
    CreateSolidBrush and FillRect however this leaves me with 2 problems:

    1). The Rect is now flat - the button no longer looks like a button.

    2). The text is invisible (the FillRect has filled over my Text!)

    Does anyone know how to change the background colour of a button while keeping it looking like an button AND keeping the text visible (like changing the system colour - but obviously not changing the system colours!!!)

    I need this pretty quick - so if anyone has the answer I'd be eternally grateful!

    Dan

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  2. Aug 17th, 2000, 08:54 AM #2
    Judd
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    OK...if I do the background first...the text stays visible, but I've still lost the 3d effect.

    Do I have to ownerdraw it?

    Dan

    Outside of a dog, a book is a man's best friend.
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  3. Aug 17th, 2000, 08:59 AM #3
    kedaman
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    You use Fillrect right? Then you could just make the rect smaller by 1 pixel at each border
    Use
    writing software in C++ is like driving rivets into steel beam with a toothpick.
    writing haskell makes your life easier:
    reverse (p (6*9)) where p x|x==0=""|True=chr (48+z): p y where (y,z)=divMod x 13
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  4. Aug 17th, 2000, 09:15 AM #4
    Judd
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    Lightbulb Kinda Works

    Kedaman,

    That sort of works but it draws the rect at client 0,0 (i.e. the top corner of the button). How can I adjust the DC to draw it at client (1,1) (Or whatever?)

    Dan

    Outside of a dog, a book is a man's best friend.
    Inside of a dog, it's too dark to read.
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  6. Aug 17th, 2000, 09:22 AM #5
    Judd
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    Its ok...I figured it out.

    Its in client coords so add to top and left, and minus from bottom and right.

    Do you know any way to adjust a colour value?

    A standard button is medium grey yes? and a pixel on the top and left is white, a pixel on the botom and right is dark grey.

    To complete the effect of what I'm doing, if I change the button colour to (Say) red, can I calculate a light red (red+white) for the top/left and a dark red (red+dark grey) for the bottom/right?

    Dan

    Outside of a dog, a book is a man's best friend.
    Inside of a dog, it's too dark to read.
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  7. Aug 17th, 2000, 10:19 AM #6
    kedaman
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    yep, you could change the color light by multiplying each colorcomponent by a constant

    Well not sure how you change the color, but you could use setpixel, a slightly slower than lineto, on the other hand you could blit i line you've drawn on a DC earlier
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    writing software in C++ is like driving rivets into steel beam with a toothpick.
    writing haskell makes your life easier:
    reverse (p (6*9)) where p x|x==0=""|True=chr (48+z): p y where (y,z)=divMod x 13
    To throw away OOP for low level languages is myopia, to keep OOP is hyperopia. To throw away OOP for a high level language is insight.
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  8. Aug 17th, 2000, 10:19 AM #7
    Judd
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    Got that too.

    To lighten: (R+255)/2,(G+255)/2,(B+255)/2
    To darken: (R)/2,(G)/2,(B)/2

    Dan

    Outside of a dog, a book is a man's best friend.
    Inside of a dog, it's too dark to read.
    Reply With Quote Reply With Quote
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