[Gambas-user] Picture/Image with correct aspect ratio (G2)

[Matti]

Hi Rolf,

sorry - what I remembered was how I worked with thumbnails. But they have a 
fixed size, and so I could use a square PictureBox of the same size.

When I have larger images and/or don't know the dimensions, I use 'stretched' 
PictureBoxes and calculate their widht/height, just like you did.


Am 16.03.2012 10:34, schrieb Rolf-Werner Eilert:
> Hi Matti,
>
> You are right, but only if the photo is as large as the PictureBox or
> smaller. If it's larger, the photo's center will be shown, but at its
> original size, i. e. you will see part of the photo only.
>
> After some fiddling, my father and I found a formular based on the size
> of the PictureBox (133 x 133) in my program. The PictureBox is named
> Foto, b means Width:
>
> DIM b, h AS Integer
> DIM xy AS Float
> DIM bild AS NEW Image
>
>       bild = Image.Load(ldsv.dateipfadModelle()&/ basisDaten[0])
>       b = bild.Width
>       h = bild.Height
>       IF b>  h AND b>  133 THEN
>         xy = b / h
>         h = h - ((b - 133) / xy)
>         b = 133
>       ELSE IF h>  b AND h>  133 THEN
>         xy = h / b
>         b = b - ((h - 133) / xy)
>         h = 133
>       END IF
>       Foto.Picture = bild.Picture
>       Foto.Width = b
>       Foto.Height = h
>       Foto.Stretch = TRUE
>
> This way I tried it with 200 x 300 px photos in landscape and portrait,
> everyting running perfectly. What do you think?
>
> Rolf
>
>
> Am 15.03.2012 20:18, schrieb Matti:
>> Hi Rolf,
>>
>> Square PictureBox is correct.
>> Stretched has to be set to false.
>> Then just set Alignment to Center (in code: 3).
>> That's all.
>>
>> Matti
>>
>> Am 15.03.2012 10:14, schrieb Rolf-Werner Eilert:
>>> Hi folks, this is in Gambas2:
>>>
>>> On a form, I have a PictureBox which shall show photos in landscape and
>>> portrait. So I drew a square PictureBox.
>>>
>>> I expected that if the photo has not the same aspect ratio, it will be
>>> shown with bars of the background color, but when I say Stretched =
>>> True, the picture will be shown as fitted into the complete PictureBox.
>>>
>>> Is there any way to avoid this? Or is the only way to achieve an aspect
>>> ratio correct display, changing the PictureBox's Height and Width?
>>>
>>> Thanks for your answers.
>>>
>>> Rolf
>>
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>
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