Comments by Alexey Gapon (Top 20 by date)

yes you are right! But My "Ruler"s are OnPain() based. They flickered until i wrote in class constructor "this.DoubleBuffered = true" and it stoped. Hm i am confused.

http://msdn.microsoft.com/en-us/library/system.windows.forms.tabcontrol.doublebuffered(v=vs.100).aspx

Then what is this article about?

Well something strange my TabControls dose not have "DoubleBuffered" propertie, and i can`t set it it true, i think that is why it is flickering... I ma Using Microsoft Visual Studio Express 2010

No. I didn`t... i posted a code example and it became solved (((

I tried Suspend and Resum Layout it looks not very good. The best idea is:
1) Create Bitmap from paret area of the main form
2) hide all controls
3) put this Bitmap as background image
4) resize the form
5) set back ground image to bull
6) show all controls.

Is there a way to create a printscreen bitmap from parent area of main form?

Listen... all my controls are on tabControls! I did`t find any DoubleBuffered option for tabControls non for tabPage... so that is why all my controls are blinking and flickering and jumping... everything is double bufered but TabConrtols - not. Is there a solution solve this out?

Oh no :)) I already trieed it! It slows down my form twice. And i can see each repaint in each control step by step)))

I already did it. I allways set this property to true.

It wount help because i am writing an advanced image editor. And when the main form change it`s size I call "UpDate()" function for all custom controls Panels, Pictureboxes, TabControls, Animation sliers, Rulers and so on. And in the body of the calss i calculate the location and size then just "CustomControl.Size = new Size(x, y) and CustomControl.Location = new Point (x,y)". And while i am resizing my main form all controls "jumps" and flickering. I am using Refresh() after calculating size and location. It looked like the computer calculating and drawing controls slower then the Cursor moves. It is strange there no complex calculatings. All calculatin looks like "If (something) {control.size = new Size ( parent.Size.width-10, parent.Size.height - 10} else {{control.size = new Size ( parent.Size.width + 10, parent.Size.height + 10}}" i mean no complex calculation.In many articles other people suggest enable flags such as DoubleBufered but it dosen help with custom changeing Location and Size of the controls.

MainForm.OnSizeChange()

Actualy you a wrong because BitMiracle allows to read TIFF file withot loading file into memory.

I didnt ignore anything. I asked if there a way croping the JPEGs, course i found out how to crop TIFF files. That is all i asked here. You answered my quastion about reading JPEG. So now i understand that if the resolution is larger then 5000 * 5000 i should save it into TIFF format for my tasks. Thanks A lot for the help.

I will try BitMiracle for it... will post a code here if it will work!

Very Nice Solution! Well it is helped. But now there is a quastion how to breake the image into smaller parts? Without loading whole image into memory?

I mean without waiting couple of seconds or even minutes for redrawing image in viewport.