How to Make a PictureBox Scrollable[Improved]

Question

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Note: Question is improved.

Hey everyone.

I've 2 buttons, 1 PictureBox and 1 Panel.
PictureBox's inside of the Panel and Panel's AutoScroll property is set to "true". Also PictureBox Dock property is set to "Fill".

1. Button draws a Rectangle into the pictureBox, 2. one makes it bigger whose size is bigger than the pictureBox itself. So, I need pictureBox to be scrollable.

How can I make it? Any example for this thread?

My Best Regards...

Important: Please don't give advise using existing files! I'm not using them.

Improved Version:

Considering the same situation:

Let's say when we click the second button and the rectangle and scroll bars appeared and it becomes bigger than the picturebox, but it doesn't show all the parts of the rectangle. I mean the scroolbars doesn't change dynamically so the dynamically scaled image(bigger rectangle) can't be seem properly.

How can I control set the scrollbars to control if image is bigger or not, so I can see the bigger rectangle?

Posted 23-May-11 23:30pm

Un_NaMeD

Updated 24-May-11 1:09am

v3

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2 solutions

Solution 1

Set the PictureBox's Dock property to none. If the PictureBox is set to resize with the Panel, then scroll bars have no need to become visible. So the PB must be static size and the Panel can be Docked to the form.

Posted 23-May-11 23:55pm

kornakar

Comments

Un_NaMeD 24-May-11 6:25am

I don't get this sentence.
"if the PictureBox is set to resize with the Panel, then scroll bars have no need to become visible".
I did Dock to none, but scroll bars didn't appear.
Can you make it clear?

kornakar 24-May-11 6:47am

I'm sorry if I was unclear. First you must make the PB and the Panel as big as you wish. Then when you make the panel smaller than the PB, the scroll bars will appear.

Un_NaMeD 24-May-11 6:57am

I see it now.
But there's another thing I editted in the question.
Please have a look if you have time.

kornakar 24-May-11 7:21am

Maybe you should set PictureBox's SizeMode to AutoSize (or resize it manually)?

Un_NaMeD 24-May-11 7:28am

I did, but it didn't changed.
But Thanks for sharing your time..

Sergey Alexandrovich Kryukov 24-May-11 14:51pm

This answer is basically correct (I voted 5), but may be you did not take into account something else..?

Please see my answer. If it still don't work, please notify me. I never had problem with this kind of functionality.
--SA

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-05-24T08:50:00

Solution 2

Maybe you change some properties such as the Picture box size and do not update it. Make sure you're calling System.Windows.Forms.ScrollableControl.AdjustFormScrollbars on your panel. Also, check up all other AutoScroll... properties.

[EDIT]
For example, you have Panel picturePanel, and it is a parent of you PictureBox myPicture.

C#

Panel picturePanel; 
PictureBox myPicture; //child of picturePanel

//...

myPicture.ClientSize = new Size(xSize, ySize); //changed
myPicture.Image = (Image)MyImage; //changes
//any change which potentially breaks the scroll position

//needs immediate fix:
picturePanel.AdjustFormScrollbars();

—SA

Posted 24-May-11 8:50am

Sergey Alexandrovich Kryukov

Updated 24-May-11 22:15pm

v2

Comments

Un_NaMeD 24-May-11 16:09pm

Hi SA.
Do you mean a changing like this?
<pre>
bmp = new Bitmap(pictureBox.Width, pictureBox.Height);
</pre>
Where do I have to call System.Windows.Forms.ScrollableControl.AdjustFormScrollbars?
Couldn't get it clearly :/

Sergey Alexandrovich Kryukov 24-May-11 23:16pm

Exactly, this is what I mean. You do something like that -- do AdjustFormScrollbars on a panel which is a parent to the bitmap. Please try it.
--SA

Un_NaMeD 25-May-11 3:14am

SA, maybe I'm getting on your nerves but, as saying "do AdjustFormScrollbars on a panel which is a parent to the bitmap"; a parent to Bitmap? and where will I put the code? Can you show a little pseudo code?

Sergey Alexandrovich Kryukov 25-May-11 4:09am

It's OK, sorry if I was not clear. I thought you've shown a pseudo-code yourself...
--SA

Sergey Alexandrovich Kryukov 25-May-11 4:15am

Added a sample. Can you try it?
--SA

Un_NaMeD 25-May-11 18:29pm

Thank you. it helped a lot.
By the way, Hail the answers with codes :)

Sergey Alexandrovich Kryukov 25-May-11 20:42pm

Oh, great. Did you finally put your scroll in order?
If it helps, will you consider formally accepting this answer (green button)?
Thank you.
--SA