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Thread: Effects of various RGBA values

  1. Dec 9th, 2003, 02:04 AM #1
    Cule85
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    Angry Effects of various RGBA values

    Hi everyone.
    well, i have this exercise where i have to show the effects of various RGBA values on the color produced.
    i got 4 scroll bars for the red, green, blue, and alpha values respectively. I have to displya the output color in a filled rectangle each time the user changes the value of one the scroll bars.
    i already create the rectangle, but i dont know how to change the color...of the rectangle with the scroll bars...

    well guys, i hope u can help me!

    thanks ahead!
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  2. Dec 9th, 2003, 03:49 AM #2
    Lunatic3
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    set the color to: Color.FromArgb(alpha,red,green,blue) where alpha, red, green, blue are 0-255 integers.
    'Heading for the automatic overload'
    Marillion, Brave, The Great Escape, 1994

    'How will WE stand the FIRE TOMORROW?'
    Eloy, Silent Cries and Mighty Echoes, The Vision - Burning, 1979
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  3. Dec 9th, 2003, 04:43 AM #3
    Cule85
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    thanks,
    but i already did that, ,
    the thing is to change the color in the rectangle!...
    ....


    thanks.
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  4. Dec 9th, 2003, 04:46 AM #4
    Lunatic3
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    Fill it with new color.
    'Heading for the automatic overload'
    Marillion, Brave, The Great Escape, 1994

    'How will WE stand the FIRE TOMORROW?'
    Eloy, Silent Cries and Mighty Echoes, The Vision - Burning, 1979
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  6. Dec 9th, 2003, 05:10 AM #5
    Cule85
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    but that's the thing...
    how??
    i have no idea how to do it...

    thanks...
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  7. Dec 9th, 2003, 05:22 AM #6
    Lunatic3
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    How you draw a rectangle? do you know that? The same way you can file a rectangle. For example in a paint event:
    VB Code:
    1. Dim br As New SolidBrush(Color.FromArgb(a, r, g, b))

    2. e.Graphics.FillRectangle(br, New RectangleF(0, 0, 100, 100))
    'Heading for the automatic overload'
    Marillion, Brave, The Great Escape, 1994

    'How will WE stand the FIRE TOMORROW?'
    Eloy, Silent Cries and Mighty Echoes, The Vision - Burning, 1979
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  8. Dec 9th, 2003, 08:27 AM #7
    Cule85
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    Thanks for your help
    , ,
    i really appreciate...it.

    take caer...

    see ya
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