Hi,
I wrote a small application which uses a panel with autoscroll, on which I draw a image. The image can be painted at diferent zoom values, and when I zoom in, a specified point from the image must be in the center of the panel ( that is, I zoom the image and the center of the picture will be always found in the center of the panel). To achieve this, when the zoom value is changed, I also modify the AutoScrollMinSize and AutoScrollPosition properties, to match the scrolls to the new image size and position.

The problem is that when I set the AutoScrollPosition property, the image found on the panel is automaticaly scrolled by the framework, to accomodate the new change of position of the scrolls. And this causes flicker on the image.

How can I stop the automatic scrolling of the image found on the panel ?

then it may be simple enough - make bool field, let say

private bool DisablePaint = false;

and before you start changing scroller values set it to TRUE, after values changed set it to FALSE.

In OnPaint() method simply check:

if(DisablePaint)

If you want to get rid of flicker - set property DoubleBuffered = true.

It's not about double buffering here ( with double buffer activated is even worse ).

The problem is that the framework is scrolling automaticaly the contents of the panel when I change the values of the scroll bars, and right after I change the values of scrolls, I repaint the panel. So the panel is painted once by the framework with the old picture at different zoom and at the new position, and I am repainting once again with the new image at the new zoom.

So I want to disable the repainting made by the framework, when I change the values of the scrolls.

then it may be simple enough - make bool field, let say

private bool DisablePaint = false;

and before you start changing scroller values set it to TRUE, after values changed set it to FALSE.

In OnPaint() method simply check:

if(DisablePaint)