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How to make a bitmap zoom in or out

Posted on 2002-05-06
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Last Modified: 2013-12-03
I have a picture box with a bitmap in it.
The bitmap is comprised of words.
How can I program a button so that when it is clicked, the bitmap zooms in or out making the print larger or smaller within the picbox.
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Question by:rbend
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13 Comments
 
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Expert Comment

by:n_narayanan
ID: 6992837
Here is the code for you

http://www.freevbcode.com/ShowCode.Asp?ID=432

Narayanan
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Author Comment

by:rbend
ID: 6993583
n narayanan:
this is a fine app but doesn't do the trick.
I just need the ENTIRE document to get incrementally larger or smaller (seprate buttons) within the image box.
This just does a portion of the document.
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LVL 22

Expert Comment

by:rspahitz
ID: 6994772
Transfer the image into an image control, set the Stretch  property=true, then change the size of the image control as needed:

Image1.Stretch=true
Set Image1.Picture=Picture1.picture
Image1.width=picture1.width * 2 ' stretch to double-width
Image1.height=picture1.height * 3 ' stretch to triple-height

(Fractional stretches are supported, but may *temporarily* distort the image.)

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LVL 22

Expert Comment

by:rspahitz
ID: 6994778
Furthermore, the image control may best be served within the picturebox container.  The have two buttons:

private const m_dblMagnifier as double = .10 ' 10%


Private sub cmdEnlarge()
  image1.move image1.left, image1.top, image1.width * m_dblMagnifier, image1.height * m_dblMagnifier
end sub

private sub cmdShrink()
  image1.move image1.left, image1.top, image1.width / m_dblMagnifier, image1.height / m_dblMagnifier
end sub
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Expert Comment

by:n_narayanan
ID: 6995520
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LVL 3

Expert Comment

by:n_narayanan
ID: 6995526
This is the opt link for you

http://www.a1vbcode.com/app.asp?ID=867

Cheers
Narayanan
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by:Moondancer
ID: 7017260
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LVL 16

Expert Comment

by:Richie_Simonetti
ID: 7090075
hearing...
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Accepted Solution

by:
Richie_Simonetti earned 50 total points
ID: 7093422
i did try n_narayanan's first link and it appears to do what you need (even with a little distort in the image)
That example shows complete picture zoom.
What's the problem with it?
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Expert Comment

by:rspahitz
ID: 7108204
Based on the comment selected as answer, it appears that n_narayanan's comment should have been selected.
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Expert Comment

by:Mindphaser
ID: 7108280
n_narayanan

I will post a separate 50p question for you in this TA.

** Mindphaser - Community Support Moderator **
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Expert Comment

by:Richie_Simonetti
ID: 7108479
rspahitz, problem solved in some extent >(
I hate this type of things.
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Expert Comment

by:Moondancer
ID: 7117162
Thanks, Mindphaser for adjusting this, and thanks to all, including rbend who returned and finalized this.
Moondancer - EE Moderator
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