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Showing only one image in a TSpeedButton

Posted on 2001-09-15
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Last Modified: 2010-04-06
Hi

When I load a glyph into a TSpeedButton at runtime, and it contains more than one image, it wants to display them all at the same time.  How do I get the button to display only the first image?

John
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Question by:jdthedj
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9 Comments
 
LVL 27

Expert Comment

by:kretzschmar
ID: 6484439
adjust the numglyphs property to the count of images of your bitmap
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Expert Comment

by:TOndrej
ID: 6484442
set NumGlyphs to 4, I guess
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LVL 3

Expert Comment

by:marcoszorrilla
ID: 6484445
Perhaps with this code?

These lines of code load a four-image bitmap into the Glyph property of a speed button, and specify the appropriate value for the NumGlyphs property:

SpeedButton1.Glyph.LoadFromFile('MYBITMAP.BMP');

SpeedButton1.NumGlyphs := 4;
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LVL 3

Author Comment

by:jdthedj
ID: 6485074
Thanks for the replies.

I have tried using the NumGlyphs property, but I still find that the speedbutton tries to load all the images at once.  This is my code:

GlyphBtn[UpTo].NumGlyphs := 1;
GlyphBtn[UpTo].Glyph.LoadFromFile(DirInfo.Name);

(I am using FindFirst etc to locate the bitmaps). I also tried setting NumGlyphs after loading the image, but I still get the same result.  Any ideas?

John
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LVL 27

Expert Comment

by:kretzschmar
ID: 6485082
to repeat

>adjust the numglyphs property to the count of images of your bitmap

contains your bitmap 4 pictures then set NumGlyphs to 4 -> one image is shown on the speedbutton
contains your bitmap 2 pictures then set NumGlyphs to 2 -> one image is shown on the speedbutton

meikl ;-)

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Author Comment

by:jdthedj
ID: 6485330
Thanks Meikl

How do I know how many images there are in the bitmap?

John
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Accepted Solution

by:
Fraction earned 20 total points
ID: 6485773
Suppose the glyphs width and height are the same, then you might do something like this:

NumGlyph := round(Bitmap.Width / Bitmap.Height);
0
 
LVL 3

Author Comment

by:jdthedj
ID: 6491729
Hello Fraction

I never realised it would be so complicated!  You gave me the right idea.  I divided the width by 24 (an average size) and used the integer result as the answer.  It seem to work OK.  I am surprised there is not a property called ImageCount or something.

John
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LVL 27

Expert Comment

by:kretzschmar
ID: 6492527
i guessed you more clever, my mistake
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